fix no_valid_proc (#5774)

Co-authored-by: Kim Kulling <kimkulling@users.noreply.github.com>

.coveralls.yml

@@ -1,2 +0,0 @@
-service_name: travis-pro
-repo_token: GZXuNlublKFy7HAewHAZLk5ZwgipTFAOA

.github/dependabot.yml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+- package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "gitsubmodule"
+    directory: "/"  # the .gitmodules file must be placed at the top-level directory of a git working tree
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 15  # Assimp has 15 dependencies

.github/workflows/ccpp.yml

@@ -6,14 +6,142 @@ on:
   pull_request:
     branches: [ master ]
 
+permissions:
+  contents: write # to fetch code (actions/checkout),and release
+
 jobs:
-  job:
+  build:
     name: ${{ matrix.name }}-build-and-test
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        name: [ubuntu-latest-g++, macos-latest-clang++, windows-latest-cl.exe, ubuntu-latest-clang++, ubuntu-gcc-hunter, macos-clang-hunter, windows-msvc-hunter, ubuntu-latest-gcov]
+        name: [ubuntu-latest-g++, macos-latest-clang++, windows-latest-cl.exe, ubuntu-latest-clang++]
+        # For Windows msvc, for Linux and macOS let's use the clang compiler, use gcc for Linux.
+        include:
+          - name: windows-latest-cl.exe
+            os: windows-latest
+            cxx: cl.exe
+            cc: cl.exe
+          - name: ubuntu-latest-clang++
+            os: ubuntu-latest
+            cxx: clang++
+            cc: clang
+          - name: macos-latest-clang++
+            os: macos-latest
+            cxx: clang++
+            cc: clang
+          - name: ubuntu-latest-g++
+            os: ubuntu-latest
+            cxx: g++
+            cc: gcc
+
+    steps:
+    - name: ccache
+      uses: hendrikmuhs/ccache-action@v1.2
+      
+    - uses: actions/checkout@v4
+      with:
+          submodules: true
+          
+    - uses: lukka/get-cmake@latest
+    
+    - uses: ilammy/msvc-dev-cmd@v1
+    
+    - name: Set Compiler Environment
+      uses: lukka/set-shell-env@v1
+      with:
+        CXX: ${{ matrix.cxx }}
+        CC: ${{ matrix.cc }}
+
+    - name: Cache DX SDK
+      id: dxcache
+      if: contains(matrix.name, 'windows')
+      uses: actions/cache@v4
+      with:
+        path: '${{ github.workspace }}/DX_SDK'
+        key: ${{ runner.os }}-DX_SDK
+        restore-keys: |
+          ${{ runner.os }}-DX_SDK
+
+    - name: Download DXSetup
+      if: contains(matrix.name, 'windows') && steps.dxcache.outputs.cache-hit != 'true'
+      run: |
+        curl -s -o DXSDK_Jun10.exe --location https://download.microsoft.com/download/A/E/7/AE743F1F-632B-4809-87A9-AA1BB3458E31/DXSDK_Jun10.exe
+        cmd.exe /c start /wait .\DXSDK_Jun10.exe /U /O /F /S /P "${{ github.workspace }}\DX_SDK"
+
+    - name: Set Windows specific CMake arguments
+      if: contains(matrix.name, 'windows')
+      id: windows_extra_cmake_args
+      run: echo ":set-output name=args::=-DASSIMP_BUILD_ASSIMP_TOOLS=1 -DASSIMP_BUILD_ASSIMP_VIEW=1" >> $GITHUB_OUTPUT
+    
+    - name: Set Hunter specific CMake arguments
+      if: contains(matrix.name, 'hunter')
+      id: hunter_extra_cmake_args
+      run: echo "args=-DBUILD_SHARED_LIBS=OFF -DASSIMP_HUNTER_ENABLED=ON -DCMAKE_TOOLCHAIN_FILE=${{ github.workspace }}/cmake/polly/${{ matrix.toolchain }}.cmake" >> $GITHUB_OUTPUT
+
+    - name: configure and build
+      uses: lukka/run-cmake@v3
+      env:
+        DXSDK_DIR: '${{ github.workspace }}/DX_SDK'
+
+      with:
+        cmakeListsOrSettingsJson: CMakeListsTxtAdvanced
+        cmakeListsTxtPath: '${{ github.workspace }}/CMakeLists.txt'
+        cmakeAppendedArgs: '-GNinja -DCMAKE_BUILD_TYPE=Release ${{ steps.windows_extra_cmake_args.outputs.args }} ${{ steps.hunter_extra_cmake_args.outputs.args }}'
+        buildWithCMakeArgs: '--parallel 24 -v'
+        buildDirectory: '${{ github.workspace }}/build/'
+        
+    - name: Exclude certain tests in Hunter specific builds
+      if: contains(matrix.name, 'hunter')
+      id: hunter_extra_test_args
+      run: echo "args=--gtest_filter=-utOpenGEXImportExport.Importissue1340_EmptyCameraObject:utColladaZaeImportExport.importBlenFromFileTest" >> $GITHUB_OUTPUT
+
+    - name: test
+      run: cd build/bin && ./unit ${{ steps.hunter_extra_test_args.outputs.args }}
+      shell: bash
+
+    - uses: actions/upload-artifact@v4
+      if: matrix.name == 'windows-msvc'
+      with:
+        name: 'assimp-bins-${{ matrix.name }}'
+        path: build/bin/assimp*.exe
+        
+    - uses: marvinpinto/action-automatic-releases@latest
+      if: contains(matrix.name, 'windows-msvc-hunter')
+      with:
+        repo_token: "${{ secrets.GITHUB_TOKEN }}"
+        automatic_release_tag: "master"
+        prerelease: true
+        title: "AutoRelease"
+        files: |
+          build/bin/assimp*.exe
+
+  create-release:
+    needs: [build]
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/tags/')
+    steps:
+      - id: create-release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: '${{secrets.GITHUB_TOKEN}}'
+        with:
+          tag_name: '${{github.ref}}'
+          release_name: 'Release ${{github.ref}}'
+          draft: false
+          prerelease: true
+      - run: |
+          echo '${{steps.create-release.outputs.upload_url}}' > release_upload_url.txt
+      - uses: actions/upload-artifact@v4
+        with:
+          name: create-release
+          path: release_upload_url.txt
+
+  upload-release:
+    strategy:
+      matrix:
+        name: [ubuntu-latest-g++, macos-latest-clang++, windows-latest-cl.exe, ubuntu-latest-clang++, ubuntu-gcc-hunter, macos-clang-hunter, windows-msvc-hunter]
         # For Windows msvc, for Linux and macOS let's use the clang compiler, use gcc for Linux.
         include:
           - name: windows-latest-cl.exe
@@ -41,102 +169,24 @@ jobs:
           - name: windows-msvc-hunter
             os: windows-latest
             toolchain: ninja-vs-win64-cxx17
-          - name: ubuntu-latest-gcov
-            os: ubuntu-latest
-            cxx: g++
-            cc: gcc
-
+            
+    needs: [create-release]
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/tags/')
     steps:
-    - uses: actions/checkout@v2
-    
-    - uses: lukka/get-cmake@latest
-    
-    - uses: ilammy/msvc-dev-cmd@v1
-    
-    - name: Set Compiler Environment
-      if: "!endsWith(matrix.name, 'hunter')"
-      uses: lukka/set-shell-env@v1
-      with:
-        CXX: ${{ matrix.cxx }}
-        CC: ${{ matrix.cc }}
-
-    - name: Set Compiler Environment for Hunter on Windows
-      if: startsWith(matrix.name, 'windows') && endsWith(matrix.name, 'hunter')
-      uses: lukka/set-shell-env@v1
-      with:
-        VS160COMNTOOLS: C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\Tools
-
-    - name: Checkout Hunter toolchains
-      if: endsWith(matrix.name, 'hunter')
-      uses: actions/checkout@v2
-      with:
-        repository: cpp-pm/polly
-        path: cmake/polly 
-
-    - name: Install  lcov
-      uses: danielealbano/lcov-action@v1
-      
-    - name: Remove contrib directory for Hunter builds
-      if: contains(matrix.name, 'hunter')
-      uses: JesseTG/rm@v1.0.2
-      with:
-        path: contrib
-
-    - name: Cache DX SDK
-      id: dxcache
-      if: contains(matrix.name, 'windows')
-      uses: actions/cache@v2
-      with:
-        path: '${{ github.workspace }}/DX_SDK'
-        key: ${{ runner.os }}-DX_SDK
-        restore-keys: |
-          ${{ runner.os }}-DX_SDK
-
-    - name: Download DXSetup
-      if: contains(matrix.name, 'windows') && steps.dxcache.outputs.cache-hit != 'true'
-      run: |
-        curl -s -o DXSDK_Jun10.exe --location https://download.microsoft.com/download/A/E/7/AE743F1F-632B-4809-87A9-AA1BB3458E31/DXSDK_Jun10.exe
-        cmd.exe /c start /wait .\DXSDK_Jun10.exe /U /O /F /S /P "${{ github.workspace }}\DX_SDK"
-
-    - name: Set Windows specific CMake arguments
-      if: contains(matrix.name, 'windows')
-      id: windows_extra_cmake_args
-      run: echo "::set-output name=args::-DASSIMP_BUILD_ASSIMP_TOOLS=1 -DASSIMP_BUILD_ASSIMP_VIEW=1"
-    
-    - name: Set Hunter specific CMake arguments
-      if: contains(matrix.name, 'hunter')
-      id: hunter_extra_cmake_args
-      run: echo "::set-output name=args::-DBUILD_SHARED_LIBS=OFF -DASSIMP_HUNTER_ENABLED=ON -DCMAKE_TOOLCHAIN_FILE=${{ github.workspace }}/cmake/polly/${{ matrix.toolchain }}.cmake -DASSIMP_COVERALLS=ON"
-
-    - name: configure and build
-      uses: lukka/run-cmake@v3
-      env:
-        DXSDK_DIR: '${{ github.workspace }}/DX_SDK'
-
-      with:
-        cmakeListsOrSettingsJson: CMakeListsTxtAdvanced
-        cmakeListsTxtPath: '${{ github.workspace }}/CMakeLists.txt'
-        cmakeAppendedArgs: '-GNinja -DCMAKE_BUILD_TYPE=Release ${{ steps.windows_extra_cmake_args.outputs.args }} ${{ steps.hunter_extra_cmake_args.outputs.args }}'
-        buildWithCMakeArgs: '-- -v'
-        buildDirectory: '${{ github.workspace }}/build/'
-        
-    - name: Exclude certain tests in Hunter specific builds
-      if: contains(matrix.name, 'hunter')
-      id: hunter_extra_test_args
-      run: echo "::set-output name=args::--gtest_filter=-utOpenGEXImportExport.Importissue1340_EmptyCameraObject:utColladaZaeImportExport.importBlenFromFileTest"
-
-    - name: test
-      run: cd build/bin && ./unit ${{ steps.hunter_extra_test_args.outputs.args }}
-      shell: bash
-      
-    - name: Coveralls
-      uses: coverallsapp/github-action@master
-      with:
-        github-token: ${{ secrets.GITHUB_TOKEN }}
-        cmakeAppendedArgs: '-DASSIMP_COVERALLS=ON'
-
-    - uses: actions/upload-artifact@v2
-      if: matrix.name == 'windows-msvc'
-      with:
-        name: 'assimp-bins-${{ matrix.name }}-${{ github.sha }}'
-        path: build/bin
+      - uses: softprops/action-gh-release@v2
+        with:
+          name: create-release
+      - id: upload-url
+        run: |
+          echo "url=$(cat create-release/release_upload_url.txt)" >> $GITHUB_OUTPUT
+      - uses: actions/download-artifact@v4
+        with:
+          name: 'assimp-bins-${{ matrix.name }}-${{ github.sha }}'
+      - uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: '${{secrets.GITHUB_TOKEN}}'
+        with:
+          files: |
+            *.zip
+ 

.github/workflows/cifuzz.yml

@@ -0,0 +1,26 @@
+name: CIFuzz
+on: [pull_request]
+jobs:
+  Fuzzing:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Build Fuzzers
+      id: build
+      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
+      with:
+        oss-fuzz-project-name: 'assimp'
+        dry-run: false
+        language: c++
+    - name: Run Fuzzers
+      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
+      with:
+        oss-fuzz-project-name: 'assimp'
+        fuzz-seconds: 300
+        dry-run: false
+        language: c++
+    - name: Upload Crash
+      uses: actions/upload-artifact@v4
+      if: failure() && steps.build.outcome == 'success'
+      with:
+        name: artifacts
+        path: ./out/artifacts

.github/workflows/inno_setup

@@ -0,0 +1,51 @@
+name: Build Windows Installer
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+jobs:
+  build:
+    name: Build the Inno Setup Installer
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: lukka/get-cmake@latest
+      - uses: ilammy/msvc-dev-cmd@v1
+
+
+      - name: Cache DX SDK
+        id: dxcache
+        uses: actions/cache@v4
+        with:
+          path: '${{ github.workspace }}/DX_SDK'
+          key: ${{ runner.os }}-DX_SDK
+          restore-keys: |
+            ${{ runner.os }}-DX_SDK
+
+      - name: Download DXSetup
+        run: |
+          curl -s -o DXSDK_Jun10.exe --location https://download.microsoft.com/download/A/E/7/AE743F1F-632B-4809-87A9-AA1BB3458E31/DXSDK_Jun10.exe
+          cmd.exe /c start /wait .\DXSDK_Jun10.exe /U /O /F /S /P "${{ github.workspace }}\DX_SDK"
+
+      - name: Set Windows specific CMake arguments
+        id: windows_extra_cmake_args
+        run: echo "::set-output name=args::-DASSIMP_BUILD_ASSIMP_TOOLS=1 -DASSIMP_BUILD_ASSIMP_VIEW=1 -DASSIMP_BUILD_ZLIB=1"
+
+      - name: configure and build
+        uses: lukka/run-cmake@v3
+        env:
+          DXSDK_DIR: '${{ github.workspace }}/DX_SDK'
+
+        with:
+          cmakeListsOrSettingsJson: CMakeListsTxtAdvanced
+          cmakeListsTxtPath: '${{ github.workspace }}/CMakeLists.txt'
+          cmakeAppendedArgs: '-GNinja -DCMAKE_BUILD_TYPE=Release ${{ steps.windows_extra_cmake_args.outputs.args }} ${{ steps.hunter_extra_cmake_args.outputs.args }}'
+          buildWithCMakeArgs: '--parallel 24 -v'
+          buildDirectory: '${{ github.workspace }}/build/'
+
+      - name: Compile .ISS to .EXE Installer
+        uses: Minionguyjpro/Inno-Setup-Action@v1.2.2
+        with:
+          path: packaging/windows-innosetup/script_x64.iss
+          options: /O+

.github/workflows/sanitizer.yml

@@ -6,12 +6,15 @@ on:
   pull_request:
     branches: [ master ]
 
+permissions:
+  contents: read # to fetch code (actions/checkout)
+
 jobs:
   job1:
     name: adress-sanitizer
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: lukka/get-cmake@latest    
     - uses: lukka/set-shell-env@v1
       with:
@@ -35,7 +38,7 @@ jobs:
     name: undefined-behavior-sanitizer
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: lukka/get-cmake@latest    
     - uses: lukka/set-shell-env@v1
       with:
@@ -43,7 +46,7 @@ jobs:
         CC: clang
     
     - name: configure and build
-      uses: lukka/run-cmake@v2
+      uses: lukka/run-cmake@v3
       with:
         cmakeListsOrSettingsJson: CMakeListsTxtAdvanced
         cmakeListsTxtPath: '${{ github.workspace }}/CMakeLists.txt'
@@ -54,3 +57,13 @@ jobs:
     - name: test
       run: cd build/bin && ./unit
       shell: bash
+
+  job3:
+    name: printf-sanitizer
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: run scan_printf script
+      run: ./scripts/scan_printf.sh
+      shell: bash

.gitignore

@@ -120,3 +120,7 @@ tools/assimp_qt_viewer/ui_mainwindow.h
 
 #Generated directory
 generated/*
+
+# 3rd party cloned repos/tarballs etc
+# tinyusdz repo, automatically cloned via CMake
+contrib/tinyusdz/autoclone

.travis.sh

@@ -1,67 +0,0 @@
-#---------------------------------------------------------------------------
-#Open Asset Import Library (assimp)
-#---------------------------------------------------------------------------
-# Copyright (c) 2006-2020, assimp team
-#
-# License see LICENSE file
-#
-function generate() {
-    OPTIONS="-DASSIMP_WERROR=ON"
-    OPTIONS="$OPTIONS -DASSIMP_NO_EXPORT=NO"
-    
-    if [ "$DISABLE_EXPORTERS" = "YES" ] ; then
-        OPTIONS="$OPTIONS -DASSIMP_NO_EXPORT=YES"
-    else
-        OPTIONS="$OPTIONS -DASSIMP_NO_EXPORT=NO"
-    fi
-
-    if [ "$SHARED_BUILD" = "ON" ] ; then
-        OPTIONS="$OPTIONS -DBUILD_SHARED_LIBS=ON"
-    else
-        OPTIONS="$OPTIONS -DBUILD_SHARED_LIBS=OFF"
-    fi
-
-    if [ "$ENABLE_COVERALLS" = "ON" ] ; then
-        OPTIONS="$OPTIONS -DASSIMP_COVERALLS=ON"
-    else
-        OPTIONS="$OPTIONS -DASSIMP_COVERALLS=OFF"
-    fi
-
-    if [ "$ASAN" = "ON" ] ; then
-        OPTIONS="$OPTIONS -DASSIMP_ASAN=ON"
-    else
-        OPTIONS="$OPTIONS -DASSIMP_ASAN=OFF"
-    fi
-
-    if [ "$UBSAN" = "ON" ] ; then
-        OPTIONS="$OPTIONS -DASSIMP_UBSAN=ON"
-    fi
-
-    cmake -G "Unix Makefiles" $OPTIONS
-}
-# build and run unittests, if not android
-if [ $ANDROID ]; then
-    ant -v -Dmy.dir=${TRAVIS_BUILD_DIR} -f ${TRAVIS_BUILD_DIR}/port/jassimp/build.xml ndk-jni
-fi
-if [ "$TRAVIS_OS_NAME" = "linux" ]; then
-  if [ $ANALYZE = "ON" ] ; then
-    if [ "$CC" = "clang" ]; then
-        scan-build cmake -G "Unix Makefiles" -DBUILD_SHARED_LIBS=OFF -DASSIMP_BUILD_TESTS=OFF
-        scan-build --status-bugs make -j2
-    else
-        cppcheck --version
-        generate \
-        && cppcheck --error-exitcode=1 -j2 -Iinclude -Icode code 2> cppcheck.txt
-        if [ -s cppcheck.txt ]; then
-            cat cppcheck.txt
-            exit 1
-        fi
-    fi
-  else
-    generate \
-    && make -j4 \
-    && sudo make install \
-    && sudo ldconfig \
-    && (cd test/unit; ../../bin/unit)
-  fi
-fi

.travis.yml

@@ -1,78 +0,0 @@
-sudo: required
-language: cpp
-
-cache: ccache
-
-before_install:
-  - if [ "$TRAVIS_OS_NAME" = "linux" ]; then sudo apt-get update -qq && sudo apt-get install cmake cppcheck && sudo apt-get install cmake python3 && sudo apt-get install -qq freeglut3-dev libxmu-dev libxi-dev ; echo -n | openssl s_client -connect scan.coverity.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' | sudo tee -a /etc/ssl/certs/ca- ; fi
-  - 'if [ "$TRAVIS_OS_NAME" = "osx" ];  then
-       if brew ls --versions cmake > /dev/null; then
-         echo cmake already installed.;
-       else
-         brew install cmake;
-       fi;
-       brew install python3;
-       brew install homebrew/x11/freeglut; 
-    fi'
-  - echo -e "#ifndef A_R_H_INC\n#define A_R_H_INC\n#define GitVersion ${TRAVIS_JOB_ID}\n#define GitBranch \"${TRAVIS_BRANCH}\"\n#endif // A_R_H_INC" > revision.h
-  # install latest LCOV (1.9 was failing)
-  - if [ "$TRAVIS_OS_NAME" = "linux" ]; then cd ${TRAVIS_BUILD_DIR} && wget http://ftp.de.debian.org/debian/pool/main/l/lcov/lcov_1.11.orig.tar.gz && tar xf lcov_1.11.orig.tar.gz && sudo make -C lcov-1.11/ install && gem install coveralls-lcov && lcov --version && g++ --version ; fi
-
-os:
-  - linux
-
-compiler:
-  - gcc
-  - clang
-
-env:
-  global:
-    - secure: "lZ7pHQvl5dpZWzBQAaIMf0wqrvtcZ4wiZKeIZjf83TEsflW8+z0uTpIuN30ZV6Glth/Sq1OhLnTP5+N57fZU/1ebA5twHdvP4bS5CIUUg71/CXQZNl36xeaqvxsG/xRrdpKOsPdjAOsQ9KPTQulsX43XDLS7CasMiLvYOpqKcPc="
-    - PV=r8e PLATF=linux-x86_64 NDK_HOME=${TRAVIS_BUILD_DIR}/android-ndk-${PV} PATH=${PATH}:${NDK_HOME}
-
-git:
-  depth: 1
-
-matrix:
-  include:
-    - os: linux
-      compiler: clang
-      env: ASAN=ON
-    - os: linux
-      compiler: clang
-      env: UBSAN=ON
-    - os: linux
-      compiler: clang
-      env: SHARED_BUILD=ON
-    - os: linux
-      compiler: gcc
-      env: ANALYZE=ON
-    - os: linux
-      compiler: gcc
-      env: ENABLE_COVERALLS=ON
-    - os: linux
-      compiler: gcc
-      env: SHARED_BUILD=ON
-
-install:
-  - if [ $ANDROID ]; then wget -c http://dl.google.com/android/ndk/android-ndk-${PV}-${PLATF}.tar.bz2 && tar xf android-ndk-${PV}-${PLATF}.tar.bz2 ; fi
-
-before_script:
-  cmake . -DASSIMP_ENABLE_BOOST_WORKAROUND=YES
-
-script:
-  - export COVERALLS_SERVICE_NAME=travis-ci
-  - export COVERALLS_REPO_TOKEN=abc12345
-  - . ./.travis.sh
- 
-after_success:
-  - if [ "$TRAVIS_OS_NAME" = "linux" ]; then cd ${TRAVIS_BUILD_DIR} && lcov --directory . --capture --output-file coverage.info && lcov --remove coverage.info '/usr/*' 'contrib/*' 'test/*' --output-file coverage.info && lcov --list coverage.info && coveralls-lcov --source-encoding=ISO-8859-1 --repo-token=${COVERALLS_TOKEN} coverage.info ; fi
-
-addons:
-  coverity_scan:
-    project:
-      name: "assimp/assimp"
-    notification_email: kim.kulling@googlemail.com
-    build_command_prepend: "cmake ./"
-    build_command: "make -j4"
-    branch_pattern: coverity_scan

BUILDBINARIES_EXAMPLE.bat

@@ -10,16 +10,15 @@
 :: Also see: https://github.com/assimp/assimp/pull/2646
 
 SET SOURCE_DIR=.
+SET GENERATOR=Visual Studio 16 2019
 
-:: For generators see "cmake --help"
-SET GENERATOR=Visual Studio 15 2017
-
-SET BINARIES_DIR="./BINARIES/Win32"
-cmake CMakeLists.txt -G "%GENERATOR%" -S %SOURCE_DIR% -B %BINARIES_DIR%
+SET BINARIES_DIR="./build/Win32"
+cmake . -G "%GENERATOR%" -A Win32 -S %SOURCE_DIR% -B %BINARIES_DIR%
+cmake --build %BINARIES_DIR% --config debug
 cmake --build %BINARIES_DIR% --config release
 
-SET BINARIES_DIR="./BINARIES/x64"
-cmake CMakeLists.txt -G "%GENERATOR% Win64" -S %SOURCE_DIR% -B %BINARIES_DIR%
+SET BINARIES_DIR="./build/x64"
+cmake . -G "%GENERATOR%" -A x64 -S %SOURCE_DIR% -B %BINARIES_DIR%
 cmake --build %BINARIES_DIR% --config debug
 cmake --build %BINARIES_DIR% --config release
 

Build.md

@@ -7,14 +7,15 @@ You can download and install assimp using the [vcpkg](https://github.com/Microso
     cd vcpkg
     ./bootstrap-vcpkg.sh
     ./vcpkg integrate install
-    vcpkg install assimp
+    ./vcpkg install assimp
 ```
 The assimp port in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please [create an issue or pull request](https://github.com/Microsoft/vcpkg) on the vcpkg repository.
 
 ## Install on Ubuntu
 You can install the Asset-Importer-Lib via apt:
 ```
-sudo apt-get install assimp
+sudo apt-get update
+sudo apt-get install libassimp-dev
 ```
 
 ## Install pyassimp
@@ -26,7 +27,7 @@ pip install pyassimp
 ## Manual build instructions
 
 ### Install CMake
-Asset-Importer-Lib can be build for a lot of different platforms. We are using cmake to generate the build environment for these via cmake. So you have to make sure that you have a working cmake-installation on your system. You can download it at https://cmake.org/ or for linux install it via
+Asset-Importer-Lib can be built for a lot of different platforms. We are using cmake to generate the build environment for these via cmake. So you have to make sure that you have a working cmake-installation on your system. You can download it at https://cmake.org/ or for linux install it via
 ```bash
 sudo apt-get install cmake
 ```
@@ -42,15 +43,16 @@ cd assimp
 cmake CMakeLists.txt 
 cmake --build .
 ```
+Note that by default this builds a shared library into the `bin` directory. If you want to build it as a static library see the build options at the bottom of this file.
 
 ### Build instructions for Windows with Visual-Studio
 
-First you have to install Visual-Studio on your windows-system. You can get the Community-Version for free here: https://visualstudio.microsoft.com/de/downloads/
+First, you have to install Visual-Studio on your windows-system. You can get the Community-Version for free here: https://visualstudio.microsoft.com/de/downloads/
 To generate the build environment for your IDE open a command prompt, navigate to your repo and type:
 ```bash
 cmake CMakeLists.txt
 ```
-This will generate the project files for the visual studio. All dependencies used to build Asset-IMporter-Lib shall be part of the repo. If you want to use you own zlib.installation this is possible as well. Check the options for it.
+This will generate the project files for the visual studio. All dependencies used to build Asset-Importer-Lib shall be part of the repo. If you want to use you own zlib installation this is possible as well. Check the options for it.
 
 ### Build instructions for Windows with UWP
 See <https://stackoverflow.com/questions/40803170/cmake-uwp-using-cmake-to-build-universal-windows-app>
@@ -62,9 +64,9 @@ Open a terminal and got to your repository. You can generate the makefiles and b
 cmake CMakeLists.txt
 make -j4
 ```
-The option -j descripes the number of parallel processes for the build. In this case make will try to use 4 cores for the build.
+The option -j describes the number of parallel processes for the build. In this case make will try to use 4 cores for the build.
 
-If you want to use a IDE for linux you can try QTCreator for instance. 
+If you want to use an IDE for linux you can try QTCreator for instance. 
 
 ### Build instructions for MinGW
  Older versions of MinGW's compiler (e.g. 5.1.0) do not support the -mbig_obj flag 
@@ -84,23 +86,28 @@ Besides the toolchain, compilation should be the same as for Linux / Unix.
 
 ### CMake build options
 The cmake-build-environment provides options to configure the build. The following options can be used:
-- **BUILD_SHARED_LIBS ( default ON )**: Generation of shared libs ( dll for windows, so for Linux ). Set this to OFF to get a static lib.
-- **BUILD_FRAMEWORK ( default OFF, MacOnly)**: Build package as Mac OS X Framework bundle
-- **ASSIMP_DOUBLE_PRECISION( default OFF )**: All data will be stored as double values.
-- **ASSIMP_OPT_BUILD_PACKAGES ( default OFF)**: Set to ON to generate CPack configuration files and packaging targets
-- **ASSIMP_ANDROID_JNIIOSYSTEM ( default OFF )**: Android JNI IOSystem support is active
-- **ASSIMP_NO_EXPORT ( default OFF )**: Disable Assimp's export functionality
-- **ASSIMP_BUILD_ZLIB ( default OFF )**: Build your own zlib
-- **ASSIMP_BUILD_ASSIMP_TOOLS ( default ON )**: If the supplementary tools for Assimp are built in addition to the library.
-- **ASSIMP_BUILD_SAMPLES ( default OFF )**: If the official samples are built as well (needs Glut).
-- **ASSIMP_BUILD_TESTS ( default ON )**: If the test suite for Assimp is built in addition to the library.
-- **ASSIMP_COVERALLS ( default OFF )**: Enable this to measure test coverage.
-- **ASSIMP_ERROR_MAX( default OFF)**: Enable all warnings.
-- **ASSIMP_WERROR( default OFF )**: Treat warnings as errors.
-- **ASSIMP_ASAN ( default OFF )**: Enable AddressSanitizer.
-- **ASSIMP_UBSAN ( default OFF )**: Enable Undefined Behavior sanitizer.
-- **SYSTEM_IRRXML ( default OFF )**: Use system installed Irrlicht/IrrXML library.
-- **BUILD_DOCS ( default OFF )**: Build documentation using Doxygen.
-- **INJECT_DEBUG_POSTFIX( default ON )**: Inject debug postfix in .a/.so lib names
-- **IGNORE_GIT_HASH ( default OFF )**: Don't call git to get the hash.
-- **ASSIMP_INSTALL_PDB ( default ON )**: Install MSVC debug files.
+- **ASSIMP_HUNTER_ENABLED (default OFF)**: Enable Hunter package manager support.
+- **BUILD_SHARED_LIBS (default ON)**: Generation of shared libs (dll for windows, so for Linux). Set this to OFF to get a static lib.
+- **ASSIMP_BUILD_FRAMEWORK (default OFF, MacOnly)**: Build package as Mac OS X Framework bundle.
+- **ASSIMP_DOUBLE_PRECISION (default OFF)**: All data will be stored as double values.
+- **ASSIMP_OPT_BUILD_PACKAGES (default OFF)**: Set to ON to generate CPack configuration files and packaging targets.
+- **ASSIMP_ANDROID_JNIIOSYSTEM (default OFF)**: Android JNI IOSystem support is active.
+- **ASSIMP_NO_EXPORT (default OFF)**: Disable Assimp's export functionality.
+- **ASSIMP_BUILD_ZLIB (default OFF)**: Build our own zlib.
+- **ASSIMP_BUILD_ALL_EXPORTERS_BY_DEFAULT (default ON)**: Build Assimp with all exporters enabled.
+- **ASSIMP_BUILD_ALL_IMPORTERS_BY_DEFAULT (default ON)**: Build Assimp with all importers enabled.
+- **ASSIMP_BUILD_ASSIMP_TOOLS (default OFF)**: If the supplementary tools for Assimp are built in addition to the library.
+- **ASSIMP_BUILD_SAMPLES (default OFF)**: If the official samples are built as well (needs Glut).
+- **ASSIMP_BUILD_TESTS (default ON)**: If the test suite for Assimp is built in addition to the library.
+- **ASSIMP_COVERALLS (default OFF)**: Enable this to measure test coverage.
+- **ASSIMP_INSTALL (default ON)**: Install Assimp library. Disable this if you want to use Assimp as a submodule.
+- **ASSIMP_WARNINGS_AS_ERRORS (default ON)**: Treat all warnings as errors.
+- **ASSIMP_ASAN (default OFF)**: Enable AddressSanitizer.
+- **ASSIMP_UBSAN (default OFF)**: Enable Undefined Behavior sanitizer.
+- **ASSIMP_BUILD_DOCS (default OFF)**: Build documentation using Doxygen. OBSOLETE, see https://github.com/assimp/assimp-docs
+- **ASSIMP_INJECT_DEBUG_POSTFIX (default ON)**: Inject debug postfix in .a/.so/.lib/.dll lib names
+- **ASSIMP_IGNORE_GIT_HASH (default OFF)**: Don't call git to get the hash.
+- **ASSIMP_INSTALL_PDB (default ON)**: Install MSVC debug files.
+- **USE_STATIC_CRT (default OFF)**: Link against the static MSVC runtime libraries.
+- **ASSIMP_BUILD_DRACO (default OFF)**: Build Draco libraries. Primarily for glTF.
+- **ASSIMP_BUILD_ASSIMP_VIEW (default ON, if DirectX found, OFF otherwise)**: Build Assimp view tool (requires DirectX).

CMakeLists.txt

@@ -1,6 +1,6 @@
 # Open Asset Import Library (assimp)
 # ----------------------------------------------------------------------
-# Copyright (c) 2006-2021, assimp team
+# Copyright (c) 2006-2024, assimp team
 #
 # All rights reserved.
 #
@@ -38,9 +38,25 @@ SET(CMAKE_POLICY_DEFAULT_CMP0012 NEW)
 SET(CMAKE_POLICY_DEFAULT_CMP0074 NEW)
 SET(CMAKE_POLICY_DEFAULT_CMP0092 NEW)
 
-CMAKE_MINIMUM_REQUIRED( VERSION 3.10 )
+CMAKE_MINIMUM_REQUIRED( VERSION 3.22 )
 
-# Disabled importers: m3d for 5.1
+# Experimental USD importer: disabled, need to opt-in
+# Note: assimp github PR automatic checks will fail the PR due to compiler warnings in
+# the external, 3rd party tinyusdz code which isn't technically part of the PR since it's
+# auto-cloned during build; so MUST disable the feature or the PR will be rejected
+option(ASSIMP_BUILD_USD_IMPORTER "Enable USD file import" off)
+option(ASSIMP_BUILD_USD_VERBOSE_LOGS "Enable verbose USD import debug logging" off)
+option(ASSIMP_BUILD_USE_CCACHE "Use ccache to speed up compilation." on)
+
+if(ASSIMP_BUILD_USE_CCACHE)
+  find_program(CCACHE_PATH ccache)
+  if (CCACHE_PATH)
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ${CCACHE_PATH})
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ${CCACHE_PATH})
+  endif()
+endif()
+
+# Disabled importers: m3d for 5.1 or later
 ADD_DEFINITIONS( -DASSIMP_BUILD_NO_M3D_IMPORTER)
 ADD_DEFINITIONS( -DASSIMP_BUILD_NO_M3D_EXPORTER)
 # Toggles the use of the hunter package manager
@@ -49,14 +65,13 @@ option(ASSIMP_HUNTER_ENABLED "Enable Hunter package manager support" OFF)
 IF(ASSIMP_HUNTER_ENABLED)
   include("cmake-modules/HunterGate.cmake")
   HunterGate(
-    URL "https://github.com/cpp-pm/hunter/archive/v0.23.311.tar.gz"
-    SHA1 "1a82b9b73055879181cb1466b2ab5d48ee8ae410"
+    URL "https://github.com/cpp-pm/hunter/archive/v0.25.5.tar.gz"
+    SHA1 "a20151e4c0740ee7d0f9994476856d813cdead29"
   )
-
   add_definitions(-DASSIMP_USE_HUNTER)
 ENDIF()
 
-PROJECT(Assimp VERSION 5.1.0)
+PROJECT(Assimp VERSION 5.4.3)
 
 # All supported options ###############################################
 
@@ -84,13 +99,9 @@ OPTION( ASSIMP_NO_EXPORT
   "Disable Assimp's export functionality."
   OFF
 )
-OPTION( ASSIMP_BUILD_ZLIB
-  "Build your own zlib"
-  OFF
-)
 OPTION( ASSIMP_BUILD_ASSIMP_TOOLS
   "If the supplementary tools for Assimp are built in addition to the library."
-  ON
+  OFF
 )
 OPTION ( ASSIMP_BUILD_SAMPLES
   "If the official samples are built as well (needs Glut)."
@@ -108,9 +119,9 @@ OPTION( ASSIMP_INSTALL
   "Disable this if you want to use assimp as a submodule."
   ON
 )
-OPTION ( ASSIMP_ERROR_MAX
-  "Enable all warnings."
-  OFF
+OPTION ( ASSIMP_WARNINGS_AS_ERRORS
+  "Treat all warnings as errors."
+  ON
 )
 OPTION ( ASSIMP_ASAN
   "Enable AddressSanitizer."
@@ -134,22 +145,45 @@ OPTION ( ASSIMP_IGNORE_GIT_HASH
    OFF
 )
 
-IF ( WIN32 )
-  # Use subset of Windows.h
+IF (WIN32)
+  OPTION( ASSIMP_BUILD_ZLIB
+    "Build your zlib"
+    ON
+  )
+ELSE()
+  OPTION( ASSIMP_BUILD_ZLIB
+    "Build your zlib"
+    OFF
+  )
+ENDIF()
+
+IF (WIN32)
+  # Use a subset of Windows.h
   ADD_DEFINITIONS( -DWIN32_LEAN_AND_MEAN )
 
   IF(MSVC)
-    OPTION ( ASSIMP_BUILD_ASSIMP_VIEW
-      "If the Assimp view tool is built. (requires DirectX)"
-      OFF )
-
     OPTION( ASSIMP_INSTALL_PDB
-      "Install MSVC debug files."
+      "Create MSVC debug symbol files and add to Install target."
       ON )
     IF(NOT (MSVC_VERSION LESS 1900))
-      # Multibyte character set is deprecated since at least MSVC2015 (possibly earlier)
+      # Multibyte character set has been deprecated since at least MSVC2015 (possibly earlier)
       ADD_DEFINITIONS( -DUNICODE -D_UNICODE )
     ENDIF()
+
+    # Link statically against c/c++ lib to avoid missing redistributable such as
+    # "VCRUNTIME140.dll not found. Try reinstalling the app.", but give users
+    # a choice to opt for the shared runtime if they want.
+    option(USE_STATIC_CRT "Link against the static runtime libraries." OFF)
+
+    # The CMAKE_CXX_FLAGS vars can be overridden by some Visual Studio generators, so we use an alternative
+    # global method here:
+    if (${USE_STATIC_CRT})
+      add_compile_options(
+          $<$<CONFIG:>:/MT>
+          $<$<CONFIG:Debug>:/MTd>
+          $<$<CONFIG:Release>:/MT>
+      )
+    endif()
   ENDIF()
 ENDIF()
 
@@ -169,6 +203,7 @@ ENDIF()
 IF(NOT BUILD_SHARED_LIBS)
   MESSAGE(STATUS "Shared libraries disabled")
   SET(LINK_SEARCH_START_STATIC TRUE)
+  SET(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_STATIC_LIBRARY_SUFFIX} ${CMAKE_FIND_LIBRARY_SUFFIXES})
 ELSE()
   MESSAGE(STATUS "Shared libraries enabled")
 ENDIF()
@@ -181,10 +216,9 @@ SET (ASSIMP_VERSION ${ASSIMP_VERSION_MAJOR}.${ASSIMP_VERSION_MINOR}.${ASSIMP_VER
 SET (ASSIMP_SOVERSION 5)
 
 SET( ASSIMP_PACKAGE_VERSION "0" CACHE STRING "the package-specific version used for uploading the sources" )
-if(NOT ASSIMP_HUNTER_ENABLED)
-  # Enable C++11 support globally
-  set_property( GLOBAL PROPERTY CXX_STANDARD 11 )
-endif()
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_C_STANDARD 99)
 
 IF(NOT ASSIMP_IGNORE_GIT_HASH)
   # Get the current working branch
@@ -214,16 +248,6 @@ IF(ASSIMP_DOUBLE_PRECISION)
   ADD_DEFINITIONS(-DASSIMP_DOUBLE_PRECISION)
 ENDIF()
 
-CONFIGURE_FILE(
-  ${CMAKE_CURRENT_LIST_DIR}/revision.h.in
-  ${CMAKE_CURRENT_BINARY_DIR}/revision.h
-)
-
-CONFIGURE_FILE(
-  ${CMAKE_CURRENT_LIST_DIR}/include/assimp/config.h.in
-  ${CMAKE_CURRENT_BINARY_DIR}/include/assimp/config.h
-)
-
 INCLUDE_DIRECTORIES( BEFORE
   ./
   code/
@@ -241,108 +265,136 @@ SET(ASSIMP_LIBRARY_SUFFIX "" CACHE STRING "Suffix to append to library names")
 IF( UNIX )
   # Use GNUInstallDirs for Unix predefined directories
   INCLUDE(GNUInstallDirs)
+  # Ensure that we do not run into issues like http://www.tcm.phy.cam.ac.uk/sw/inodes64.html on 32 bit Linux
+  IF(NOT ${OPERATING_SYSTEM} MATCHES "Android")
+    IF ( CMAKE_SIZEOF_VOID_P EQUAL 4) # only necessary for 32-bit Linux
+      ADD_DEFINITIONS(-D_FILE_OFFSET_BITS=64 )
+    ENDIF()
+  ENDIF()
 ENDIF()
 
 # Grouped compiler settings ########################################
-IF ((CMAKE_C_COMPILER_ID MATCHES "GNU") AND NOT CMAKE_COMPILER_IS_MINGW)
+IF ((CMAKE_C_COMPILER_ID MATCHES "GNU") AND NOT MINGW AND NOT HAIKU)
   IF(NOT ASSIMP_HUNTER_ENABLED)
-    SET(CMAKE_CXX_STANDARD 11)
     SET(CMAKE_POSITION_INDEPENDENT_CODE ON)
   ENDIF()
+
+  IF(CMAKE_CXX_COMPILER_VERSION GREATER_EQUAL 13)
+    MESSAGE(STATUS "GCC13 detected disabling \"-Wdangling-reference\" in Cpp files as it appears to be a false positive")
+    ADD_COMPILE_OPTIONS("$<$<COMPILE_LANGUAGE:CXX>:-Wno-dangling-reference>")
+  ENDIF()
   # hide all not-exported symbols
   IF(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "mips64" )
-	SET(CMAKE_CXX_FLAGS "-mxgot -fvisibility=hidden -fno-strict-aliasing -Wall ${CMAKE_CXX_FLAGS}")
-	SET(CMAKE_C_FLAGS "-fno-strict-aliasing ${CMAKE_C_FLAGS}")
-	SET(LIBSTDC++_LIBRARIES -lstdc++)
+    SET(CMAKE_CXX_FLAGS "-mxgot -fvisibility=hidden -fno-strict-aliasing -Wall ${CMAKE_CXX_FLAGS}")
+    SET(CMAKE_C_FLAGS "-fno-strict-aliasing ${CMAKE_C_FLAGS}")
+    SET(LIBSTDC++_LIBRARIES -lstdc++)
   ELSE()
-	SET(CMAKE_CXX_FLAGS "-fvisibility=hidden -fno-strict-aliasing -Wall ${CMAKE_CXX_FLAGS}")
-	SET(CMAKE_C_FLAGS "-fno-strict-aliasing ${CMAKE_C_FLAGS}")
-	SET(LIBSTDC++_LIBRARIES -lstdc++)
+    SET(CMAKE_CXX_FLAGS "-fvisibility=hidden -fno-strict-aliasing -Wall ${CMAKE_CXX_FLAGS}")
+    SET(CMAKE_C_FLAGS "-fno-strict-aliasing ${CMAKE_C_FLAGS}")
+    SET(LIBSTDC++_LIBRARIES -lstdc++)
   ENDIF()
 ELSEIF(MSVC)
   # enable multi-core compilation with MSVC
   IF(CMAKE_CXX_COMPILER_ID MATCHES "Clang" ) # clang-cl
-    ADD_COMPILE_OPTIONS(/bigobj /W4 /WX )
+    ADD_COMPILE_OPTIONS(/bigobj)
   ELSE() # msvc
-    ADD_COMPILE_OPTIONS(/MP /bigobj /W4 /WX)
+    ADD_COMPILE_OPTIONS(/MP /bigobj)
   ENDIF()
+
   # disable "elements of array '' will be default initialized" warning on MSVC2013
   IF(MSVC12)
-    ADD_COMPILE_OPTIONS(/wd4351)	
+    ADD_COMPILE_OPTIONS(/wd4351)
   ENDIF()
-  ADD_COMPILE_OPTIONS(/wd4244) #supress warning for double to float conversion if Double precission is activated
+  # supress warning for double to float conversion if Double precision is activated
+  ADD_COMPILE_OPTIONS(/wd4244)
   SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /D_DEBUG /Zi /Od")
-  SET(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Zi")
-  SET(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /DEBUG:FULL /PDBALTPATH:%_PDB% /OPT:REF /OPT:ICF")
+  # Allow user to disable PDBs
+  if(ASSIMP_INSTALL_PDB)
+    SET(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Zi")
+    SET(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /DEBUG:FULL /PDBALTPATH:%_PDB% /OPT:REF /OPT:ICF")
+  elseif((GENERATOR_IS_MULTI_CONFIG) OR (CMAKE_BUILD_TYPE MATCHES Release))
+    message("-- MSVC PDB generation disabled. Release binary will not be debuggable.")
+  endif()
+  # Source code is encoded in UTF-8
+  ADD_COMPILE_OPTIONS(/source-charset:utf-8)
 ELSEIF (CMAKE_CXX_COMPILER_ID MATCHES "Clang" )
   IF(NOT ASSIMP_HUNTER_ENABLED)
-    SET(CMAKE_CXX_STANDARD 11)
     SET(CMAKE_POSITION_INDEPENDENT_CODE ON)
   ENDIF()
   SET(CMAKE_CXX_FLAGS "-fvisibility=hidden -fno-strict-aliasing -Wall -Wno-long-long ${CMAKE_CXX_FLAGS}" )
   SET(CMAKE_C_FLAGS "-fno-strict-aliasing ${CMAKE_C_FLAGS}")
-ELSEIF( CMAKE_COMPILER_IS_MINGW )
+ELSEIF( MINGW )
   IF (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0)
     message(FATAL_ERROR "MinGW is too old to be supported. Please update MinGW and try again.")
   ELSEIF(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.3)
     message(WARNING "MinGW is old, if you experience errors, update MinGW.")
   ENDIF()
   IF(NOT ASSIMP_HUNTER_ENABLED)
-    SET(CMAKE_CXX_FLAGS "-std=c++11 ${CMAKE_CXX_FLAGS}")
+    SET(CMAKE_CXX_FLAGS "-std=gnu++17 ${CMAKE_CXX_FLAGS}")
     SET(CMAKE_C_FLAGS "-fPIC ${CMAKE_C_FLAGS}")
   ENDIF()
-  SET(CMAKE_CXX_FLAGS "-fvisibility=hidden -fno-strict-aliasing -Wall -Wno-long-long -Wa,-mbig-obj -O3 ${CMAKE_CXX_FLAGS}")
-  SET(CMAKE_C_FLAGS "-fno-strict-aliasing ${CMAKE_C_FLAGS}")
-  ADD_DEFINITIONS( -U__STRICT_ANSI__ )
+    IF (CMAKE_BUILD_TYPE STREQUAL "Debug")
+      SET(CMAKE_CXX_FLAGS "-fvisibility=hidden -fno-strict-aliasing -Wno-dangling-reference -Wall -Wno-long-long -Wa,-mbig-obj -g ${CMAKE_CXX_FLAGS}")
+    ELSE()
+      SET(CMAKE_CXX_FLAGS "-fvisibility=hidden -fno-strict-aliasing -Wno-dangling-reference -Wall -Wno-long-long -Wa,-mbig-obj -O3 ${CMAKE_CXX_FLAGS}")
+    ENDIF()
+    SET(CMAKE_C_FLAGS "-fno-strict-aliasing ${CMAKE_C_FLAGS}")
 ENDIF()
 
 IF ( IOS AND NOT ASSIMP_HUNTER_ENABLED)
   IF (CMAKE_BUILD_TYPE STREQUAL "Debug")
-    SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fembed-bitcode -Og")
+    SET(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -fembed-bitcode -Og")
     SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fembed-bitcode -Og")
   ELSE()
-    SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fembed-bitcode -O3")
+    SET(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -fembed-bitcode -O3")
     SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fembed-bitcode -O3")
-    # Experimental for pdb generation
   ENDIF()
 ENDIF()
 
 IF (ASSIMP_COVERALLS)
   MESSAGE(STATUS "Coveralls enabled")
+
   INCLUDE(Coveralls)
   SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage")
   SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -O0 -fprofile-arcs -ftest-coverage")
 ENDIF()
 
-IF (ASSIMP_ERROR_MAX)
-  MESSAGE(STATUS "Turning on all warnings")
-  IF (MSVC)
-    ADD_COMPILE_OPTIONS(/W4) # NB: there is a /Wall option, pedantic mode
-  ELSE()
-    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
-    SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
-  ENDIF()
-ENDIF()
-
 IF (ASSIMP_ASAN)
   MESSAGE(STATUS "AddressSanitizer enabled")
+
   SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address")
-  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address")
+  SET(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -fsanitize=address")
 ENDIF()
 
 IF (ASSIMP_UBSAN)
   MESSAGE(STATUS "Undefined Behavior sanitizer enabled")
+
   SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined,shift,shift-exponent,integer-divide-by-zero,unreachable,vla-bound,null,return,signed-integer-overflow,bounds,float-divide-by-zero,float-cast-overflow,nonnull-attribute,returns-nonnull-attribute,bool,enum,vptr,pointer-overflow,builtin -fno-sanitize-recover=all")
-  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=undefined,shift,shift-exponent,integer-divide-by-zero,unreachable,vla-bound,null,return,signed-integer-overflow,bounds,float-divide-by-zero,float-cast-overflow,nonnull-attribute,returns-nonnull-attribute,bool,enum,vptr,pointer-overflow,builtin -fno-sanitize-recover=all")
+  SET(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -fsanitize=undefined,shift,shift-exponent,integer-divide-by-zero,unreachable,vla-bound,null,return,signed-integer-overflow,bounds,float-divide-by-zero,float-cast-overflow,nonnull-attribute,returns-nonnull-attribute,bool,enum,vptr,pointer-overflow,builtin -fno-sanitize-recover=all")
 ENDIF()
 
 INCLUDE (FindPkgMacros)
 INCLUDE (PrecompiledHeader)
 
 # Set Assimp project output directory variables.
-SET(ASSIMP_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin" CACHE STRING "Path for runtime output files")
-SET(ASSIMP_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin" CACHE STRING "Path for library output files")
-SET(ASSIMP_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/lib" CACHE STRING "Path for archive output files")
+# Will respect top-level CMAKE_*_OUTPUT_DIRECTORY variables if any are set.
+IF(NOT DEFINED CMAKE_RUNTIME_OUTPUT_DIRECTORY)
+  SET(ASSIMP_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin" CACHE STRING "Path for runtime output files")
+ELSE()
+  SET(ASSIMP_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_RUNTIME_OUTPUT_DIRECTORY} CACHE STRING "Path for runtime output files")
+ENDIF()
+
+IF(NOT DEFINED CMAKE_LIBRARY_OUTPUT_DIRECTORY)
+  SET(ASSIMP_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin" CACHE STRING "Path for library output files")
+ELSE()
+  SET(ASSIMP_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_LIBRARY_OUTPUT_DIRECTORY} CACHE STRING "Path for runtime output files")
+ENDIF()
+
+IF(NOT DEFINED CMAKE_ARCHIVE_OUTPUT_DIRECTORY)
+  SET(ASSIMP_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/lib" CACHE STRING "Path for library output files")
+ELSE()
+  SET(ASSIMP_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_ARCHIVE_OUTPUT_DIRECTORY} CACHE STRING "Path for runtime output files")
+ENDIF()
 
 # Macro used to set the output directories of a target to the
 # respective Assimp output directories.
@@ -369,13 +421,6 @@ IF (NOT TARGET uninstall AND ASSIMP_INSTALL)
   ADD_CUSTOM_TARGET(uninstall "${CMAKE_COMMAND}" -P "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake")
 ENDIF()
 
-# cmake configuration files
-if(${BUILD_SHARED_LIBS})
-  set(BUILD_LIB_TYPE SHARED)
-else()
-  set(BUILD_LIB_TYPE STATIC)
-endif()
-
 IF( UNIX )
   # Use GNUInstallDirs for Unix predefined directories
   INCLUDE(GNUInstallDirs)
@@ -430,18 +475,20 @@ configure_package_config_file(
     INSTALL_DESTINATION "${CONFIG_INSTALL_DIR}"
 )
 
-install(
-    FILES "${PROJECT_CONFIG}" "${VERSION_CONFIG}"
-    DESTINATION "${CONFIG_INSTALL_DIR}"
-    COMPONENT ${LIBASSIMP-DEV_COMPONENT}
-)
+if(ASSIMP_INSTALL)
+  install(
+      FILES "${PROJECT_CONFIG}" "${VERSION_CONFIG}"
+      DESTINATION "${CONFIG_INSTALL_DIR}"
+      COMPONENT ${LIBASSIMP-DEV_COMPONENT}
+  )
 
-install(
-    EXPORT "${TARGETS_EXPORT_NAME}"
-    NAMESPACE "${NAMESPACE}"
-    DESTINATION "${CONFIG_INSTALL_DIR}"
-    COMPONENT ${LIBASSIMP-DEV_COMPONENT}
-)
+  install(
+      EXPORT "${TARGETS_EXPORT_NAME}"
+      NAMESPACE "${NAMESPACE}"
+      DESTINATION "${CONFIG_INSTALL_DIR}"
+      COMPONENT ${LIBASSIMP-DEV_COMPONENT}
+  )
+endif()
 
 IF( ASSIMP_BUILD_DOCS )
   ADD_SUBDIRECTORY(doc)
@@ -459,7 +506,7 @@ IF(ASSIMP_HUNTER_ENABLED)
   set(ASSIMP_BUILD_MINIZIP TRUE)
 ELSE()
   # If the zlib is already found outside, add an export in case assimpTargets can't find it.
-  IF( ZLIB_FOUND )
+  IF( ZLIB_FOUND AND ASSIMP_INSTALL)
     INSTALL( TARGETS zlib zlibstatic
         EXPORT "${TARGETS_EXPORT_NAME}")
   ENDIF()
@@ -468,7 +515,11 @@ ELSE()
     FIND_PACKAGE(ZLIB)
   ENDIF()
 
-  IF( NOT ZLIB_FOUND )
+  IF ( NOT ZLIB_FOUND AND NOT ASSIMP_BUILD_ZLIB )
+    message( FATAL_ERROR
+      "Build configured with -DASSIMP_BUILD_ZLIB=OFF but unable to find zlib"
+    )
+  ELSEIF( NOT ZLIB_FOUND )
     MESSAGE(STATUS "compiling zlib from sources")
     INCLUDE(CheckIncludeFile)
     INCLUDE(CheckTypeSize)
@@ -537,11 +588,15 @@ SET ( ASSIMP_BUILD_NONFREE_C4D_IMPORTER OFF CACHE BOOL
 )
 
 IF (ASSIMP_BUILD_NONFREE_C4D_IMPORTER)
-  IF ( MSVC )
-    SET(C4D_INCLUDES "${CMAKE_CURRENT_SOURCE_DIR}/contrib/Cineware/includes")
+  SET(C4D_INCLUDES "${CMAKE_CURRENT_SOURCE_DIR}/contrib/Cineware/includes")
 
+  IF (WIN32)
     # pick the correct prebuilt library
-    IF(MSVC15)
+    IF(MSVC143)
+      SET(C4D_LIB_POSTFIX "_2022")
+    ELSEIF(MSV142)
+      SET(C4D_LIB_POSTFIX "_2019")
+    ELSEIF(MSVC15)
       SET(C4D_LIB_POSTFIX "_2017")
     ELSEIF(MSVC14)
       SET(C4D_LIB_POSTFIX "_2015")
@@ -553,7 +608,7 @@ IF (ASSIMP_BUILD_NONFREE_C4D_IMPORTER)
       SET(C4D_LIB_POSTFIX "_2010")
     ELSE()
       MESSAGE( FATAL_ERROR
-        "C4D is currently only supported with MSVC 10, 11, 12, 14"
+        "C4D for Windows is currently only supported with MSVC 10, 11, 12, 14, 14.2, 14.3"
       )
     ENDIF()
 
@@ -571,15 +626,30 @@ IF (ASSIMP_BUILD_NONFREE_C4D_IMPORTER)
     # winsock and winmm are necessary (and undocumented) dependencies of Cineware SDK because
     # it can be used to communicate with a running Cinema 4D instance
     SET(C4D_EXTRA_LIBRARIES WSock32.lib Winmm.lib)
+  ELSEIF (APPLE)
+    SET(C4D_LIB_BASE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/contrib/Cineware/libraries/osx")
+
+    SET(C4D_DEBUG_LIBRARIES
+      "${C4D_LIB_BASE_PATH}/debug/libcinewarelib.a"
+      "${C4D_LIB_BASE_PATH}/debug/libjpeglib.a"
+    )
+    SET(C4D_RELEASE_LIBRARIES
+      "${C4D_LIB_BASE_PATH}/release/libcinewarelib.a"
+      "${C4D_LIB_BASE_PATH}/release/libjpeglib.a"
+    )
   ELSE ()
     MESSAGE( FATAL_ERROR
-      "C4D is currently only available on Windows with Cineware SDK installed in contrib/Cineware"
+      "C4D is currently only available on Windows and macOS with Cineware SDK installed in contrib/Cineware"
     )
   ENDIF ()
 ELSE ()
   ADD_DEFINITIONS( -DASSIMP_BUILD_NO_C4D_IMPORTER )
 ENDIF ()
 
+if(ASSIMP_BUILD_DRACO_STATIC)
+  set(ASSIMP_BUILD_DRACO ON)
+endif()
+
 # Draco requires cmake 3.12
 IF (DEFINED CMAKE_VERSION AND "${CMAKE_VERSION}" VERSION_LESS "3.12")
   message(NOTICE "draco requires cmake 3.12 or newer, cmake is ${CMAKE_VERSION} . Draco is disabled")
@@ -589,7 +659,7 @@ ELSE()
   IF ( ASSIMP_BUILD_DRACO )
     # Primarily for glTF v2
     # Enable Draco glTF feature set
-    set(DRACO_GLTF ON CACHE BOOL "" FORCE)
+    set(DRACO_GLTF_BITSTREAM ON CACHE BOOL "" FORCE)
     # Disable unnecessary or omitted components
     set(DRACO_JS_GLUE OFF CACHE BOOL "" FORCE)
     set(DRACO_WASM OFF CACHE BOOL "" FORCE)
@@ -615,22 +685,29 @@ ELSE()
           "-Wno-sign-compare"
           "-Wno-unused-local-typedefs"
         )
-        # Draco 1.4.1 does not explicitly export any symbols under GCC/clang
-        list(APPEND DRACO_CXX_FLAGS
-          "-fvisibility=default"
-        )
+
+        if(NOT ASSIMP_BUILD_DRACO_STATIC)
+          # Draco 1.4.1 does not explicitly export any symbols under GCC/clang
+          list(APPEND DRACO_CXX_FLAGS
+            "-fvisibility=default"
+          )
+        endif()
       ENDIF()
 
       # Don't build or install all of Draco by default
       ADD_SUBDIRECTORY( "contrib/draco" EXCLUDE_FROM_ALL )
 
+      if(ASSIMP_BUILD_DRACO_STATIC)
+        set_property(DIRECTORY "contrib/draco" PROPERTY BUILD_SHARED_LIBS OFF)
+      endif()
+
       if(MSVC OR WIN32)
         set(draco_LIBRARIES "draco")
       else()
-        if(BUILD_SHARED_LIBS)
-          set(draco_LIBRARIES "draco_shared")
-        else()
+        if(ASSIMP_BUILD_DRACO_STATIC)
           set(draco_LIBRARIES "draco_static")
+        else()
+          set(draco_LIBRARIES "draco_shared")
         endif()
       endif()
 
@@ -638,13 +715,13 @@ ELSE()
       set_target_properties(draco_encoder draco_decoder PROPERTIES
         EXCLUDE_FROM_ALL TRUE
         EXCLUDE_FROM_DEFAULT_BUILD TRUE
-        )
+      )
 
       # Do build the draco shared library
       set_target_properties(${draco_LIBRARIES} PROPERTIES
         EXCLUDE_FROM_ALL FALSE
         EXCLUDE_FROM_DEFAULT_BUILD FALSE
-        )
+      )
 
       TARGET_USE_COMMON_OUTPUT_DIRECTORY(${draco_LIBRARIES})
       TARGET_USE_COMMON_OUTPUT_DIRECTORY(draco_encoder)
@@ -653,29 +730,34 @@ ELSE()
       set(draco_INCLUDE_DIRS "${CMAKE_CURRENT_SOURCE_DIR}/contrib/draco/src")
 
       # This is probably wrong
-      INSTALL( TARGETS ${draco_LIBRARIES}
-        EXPORT "${TARGETS_EXPORT_NAME}"
-        LIBRARY DESTINATION ${ASSIMP_LIB_INSTALL_DIR}
-        ARCHIVE DESTINATION ${ASSIMP_LIB_INSTALL_DIR}
-        RUNTIME DESTINATION ${ASSIMP_BIN_INSTALL_DIR}
-        FRAMEWORK DESTINATION ${ASSIMP_LIB_INSTALL_DIR}
-        COMPONENT ${LIBASSIMP_COMPONENT}
-        INCLUDES DESTINATION include
-    )
-
+      if (ASSIMP_INSTALL)
+        INSTALL( TARGETS ${draco_LIBRARIES}
+          EXPORT "${TARGETS_EXPORT_NAME}"
+          LIBRARY DESTINATION ${ASSIMP_LIB_INSTALL_DIR}
+          ARCHIVE DESTINATION ${ASSIMP_LIB_INSTALL_DIR}
+          RUNTIME DESTINATION ${ASSIMP_BIN_INSTALL_DIR}
+          FRAMEWORK DESTINATION ${ASSIMP_LIB_INSTALL_DIR}
+          COMPONENT ${LIBASSIMP_COMPONENT}
+          INCLUDES DESTINATION include
+        )
+      endif()
     ENDIF()
   ENDIF()
 ENDIF()
 
 # Main assimp code
 ADD_SUBDIRECTORY( code/ )
+
 IF ( ASSIMP_BUILD_ASSIMP_TOOLS )
   # The viewer for windows only
-  IF ( WIN32 )
-    OPTION ( ASSIMP_BUILD_ASSIMP_VIEW "If the Assimp view tool is built. (requires DirectX)" OFF )
+  IF (WIN32)
+    FIND_PACKAGE(DirectX)
+    OPTION ( ASSIMP_BUILD_ASSIMP_VIEW "If the Assimp view tool is built. (requires DirectX)" ${DirectX_FOUND} )
     IF ( ASSIMP_BUILD_ASSIMP_VIEW )
       ADD_SUBDIRECTORY( tools/assimp_view/ )
     ENDIF ()
+  ELSE()
+    MESSAGE("Building Assimp Viewer only supported on Windows.")
   ENDIF ()
   # The command line tool
   ADD_SUBDIRECTORY( tools/assimp_cmd/ )
@@ -695,12 +777,22 @@ IF ( ASSIMP_BUILD_TESTS )
   ADD_SUBDIRECTORY( test/ )
 ENDIF ()
 
-# Generate a pkg-config .pc for the Assimp library.
+# Generate a pkg-config .pc, revision.h, and config.h for the Assimp library.
 CONFIGURE_FILE( "${PROJECT_SOURCE_DIR}/assimp.pc.in" "${PROJECT_BINARY_DIR}/assimp.pc" @ONLY )
 IF ( ASSIMP_INSTALL )
   INSTALL( FILES "${PROJECT_BINARY_DIR}/assimp.pc" DESTINATION ${ASSIMP_LIB_INSTALL_DIR}/pkgconfig/ COMPONENT ${LIBASSIMP-DEV_COMPONENT})
 ENDIF()
 
+CONFIGURE_FILE(
+  ${CMAKE_CURRENT_LIST_DIR}/include/assimp/revision.h.in
+  ${CMAKE_CURRENT_BINARY_DIR}/include/assimp/revision.h
+)
+
+CONFIGURE_FILE(
+  ${CMAKE_CURRENT_LIST_DIR}/include/assimp/config.h.in
+  ${CMAKE_CURRENT_BINARY_DIR}/include/assimp/config.h
+)
+
 IF ( ASSIMP_INSTALL )
   IF(CMAKE_CPACK_COMMAND AND UNIX AND ASSIMP_OPT_BUILD_PACKAGES)
     # Packing information
@@ -734,7 +826,7 @@ IF ( ASSIMP_INSTALL )
     SET(CPACK_DEBIAN_PACKAGE_SECTION  "libs" )
     SET(CPACK_DEBIAN_PACKAGE_DEPENDS  "${CPACK_COMPONENTS_ALL}")
     SET(CPACK_DEBIAN_PACKAGE_SUGGESTS)
-    SET(cPACK_DEBIAN_PACKAGE_NAME     "assimp")
+    SET(CPACK_DEBIAN_PACKAGE_NAME     "assimp")
     SET(CPACK_DEBIAN_PACKAGE_REMOVE_SOURCE_FILES contrib/gtest contrib/zlib workspaces test doc obj samples packaging)
     SET(CPACK_DEBIAN_PACKAGE_SOURCE_COPY svn export --force)
     SET(CPACK_DEBIAN_CHANGELOG)
@@ -763,7 +855,7 @@ if(WIN32)
 
   IF(MSVC_TOOLSET_VERSION)
     SET(MSVC_PREFIX "vc${MSVC_TOOLSET_VERSION}")
-    SET(ASSIMP_MSVC_VERSION ${MCVS_PREFIX})
+    SET(ASSIMP_MSVC_VERSION ${MSVC_PREFIX})
   ELSE()
     IF(MSVC12)
       SET(ASSIMP_MSVC_VERSION "vc120")
@@ -771,6 +863,10 @@ if(WIN32)
       SET(ASSIMP_MSVC_VERSION "vc140")
     ELSEIF(MSVC15)
       SET(ASSIMP_MSVC_VERSION "vc141")
+    ELSEIF(MSV142)
+      SET(ASSIMP_MSVC_VERSION "vc142")
+    ELSEIF(MSVC143)
+      SET(ASSIMP_MSVC_VERSION "vc143")
     ENDIF()
   ENDIF()
 

CODE_OF_CONDUCT.md

@@ -0,0 +1,128 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+.
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior,  harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.

Dockerfile

@@ -1,16 +1,12 @@
-FROM ubuntu:14.04
+FROM ubuntu:22.04
 
-RUN apt-get update && apt-get install -y \
+RUN apt-get update && apt-get install --no-install-recommends -y ninja-build \
     git cmake build-essential software-properties-common
 
-RUN add-apt-repository ppa:ubuntu-toolchain-r/test && apt-get update && apt-get install -y gcc-4.9 g++-4.9 && \
-    cd /usr/bin && \
-    rm gcc g++ cpp && \
-    ln -s gcc-4.9 gcc && \
-    ln -s g++-4.9 g++ && \
-    ln -s cpp-4.9 cpp
+RUN add-apt-repository ppa:ubuntu-toolchain-r/test && apt-get update 
 
 WORKDIR /opt
+RUN apt install zlib1g-dev
 
 # Build Assimp
 RUN git clone https://github.com/assimp/assimp.git /opt/assimp
@@ -19,7 +15,8 @@ WORKDIR /opt/assimp
 
 RUN git checkout master \
     && mkdir build && cd build && \
-    cmake \
+    cmake -G 'Ninja' \
     -DCMAKE_BUILD_TYPE=Release \
+    -DASSIMP_BUILD_ASSIMP_TOOLS=ON \
     .. && \
-    make && make install
+    ninja -j4 && ninja install

INSTALL

@@ -14,4 +14,4 @@ https://assimp-docs.readthedocs.io/en/latest/
 Building Assimp 
 ------------------------------
 
-Just check the build-instaructions which you can find here: https://github.com/assimp/assimp/blob/master/Build.md
+Just check the build-instructions which you can find here: https://github.com/assimp/assimp/blob/master/Build.md

README

@@ -1 +0,0 @@
-See Readme.md

Readme.md

@@ -1,40 +1,41 @@
 Open Asset Import Library (assimp)
 ==================================
-A library to import and export various 3d-model-formats including scene-post-processing to generate missing render data.
+
+Open Asset Import Library is a library to load various 3d file formats into a shared, in-memory format. It supports more than __40 file formats__ for import and a growing selection of file formats for export.
+
 ### Current project status ###
 [![Financial Contributors on Open Collective](https://opencollective.com/assimp/all/badge.svg?label=financial+contributors)](https://opencollective.com/assimp) 
 ![C/C++ CI](https://github.com/assimp/assimp/workflows/C/C++%20CI/badge.svg)
-<a href="https://scan.coverity.com/projects/5607">
-  <img alt="Coverity Scan Build Status"
-       src="https://scan.coverity.com/projects/5607/badge.svg"/>
-</a>
 [![Codacy Badge](https://app.codacy.com/project/badge/Grade/9973693b7bdd4543b07084d5d9cf4745)](https://www.codacy.com/gh/assimp/assimp/dashboard?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=assimp/assimp&amp;utm_campaign=Badge_Grade)
-[![Coverage Status](https://coveralls.io/repos/github/assimp/assimp/badge.svg?branch=master)](https://coveralls.io/github/assimp/assimp?branch=master)
 [![Join the chat at https://gitter.im/assimp/assimp](https://badges.gitter.im/assimp/assimp.svg)](https://gitter.im/assimp/assimp?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![Average time to resolve an issue](http://isitmaintained.com/badge/resolution/assimp/assimp.svg)](http://isitmaintained.com/project/assimp/assimp "Average time to resolve an issue")
-[![Total alerts](https://img.shields.io/lgtm/alerts/g/assimp/assimp.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/assimp/assimp/alerts/)
+[![Percentage of issues still open](http://isitmaintained.com/badge/open/assimp/assimp.svg)](http://isitmaintained.com/project/assimp/assimp "Percentage of issues still open")
 <br>
 
 APIs are provided for C and C++. There are various bindings to other languages (C#, Java, Python, Delphi, D). Assimp also runs on Android and iOS.
-Additionally, assimp features various __mesh post processing tools__: normals and tangent space generation, triangulation, vertex cache locality optimization, removal of degenerate primitives and duplicate vertices, sorting by primitive type, merging of redundant materials and many more.
+Additionally, assimp features various __mesh post-processing tools__: normals and tangent space generation, triangulation, vertex cache locality optimization, removal of degenerate primitives and duplicate vertices, sorting by primitive type, merging of redundant materials and many more.
 
-### Latest Doc's ###
-Please check the latest documents at [Asset-Importer-Lib-Doc](https://assimp-docs.readthedocs.io/en/latest/). 
+### Documentation ###
+Read [our latest documentation](https://assimp-docs.readthedocs.io/en/latest/).
 
-### Get involved ###
-This is the development repo containing the latest features and bugfixes. For productive use though, we recommend one of the stable releases available from [Github Assimp Releases](https://github.com/assimp/assimp/releases).
-<br>
-You find a bug in the docs? Use [Doc-Repo](https://github.com/assimp/assimp-docs).
-<br>
-Please check our Wiki as well: https://github.com/assimp/assimp/wiki
+### Pre-built binaries ###
+Download binaries from [our Itchi Projectspace](https://kimkulling.itch.io/the-asset-importer-lib).
 
-If you want to check our Model-Database, use the following repo: https://github.com/assimp/assimp-mdb
+### Test data ###
+Clone [our model database](https://github.com/assimp/assimp-mdb).
+
+### Communities ###
+- Ask questions at [the Assimp Discussion Board](https://github.com/assimp/assimp/discussions).
+- Find us on [https://discord.gg/s9KJfaem](https://discord.gg/kKazXMXDy2)
+- Ask [the Assimp community on Reddit](https://www.reddit.com/r/Assimp/).
+- Ask on [StackOverflow with the assimp-tag](http://stackoverflow.com/questions/tagged/assimp?sort=newest). 
+- Nothing has worked? File a question or an issue-report at [The Assimp-Issue Tracker](https://github.com/assimp/assimp/issues)
 
 #### Supported file formats ####
-You can find the complete list of supported file-formats [here](https://github.com/assimp/assimp/blob/master/doc/Fileformats.md)
+See [the complete list of supported formats](https://github.com/assimp/assimp/blob/master/doc/Fileformats.md).
 
 ### Building ###
-Take a look into the https://github.com/assimp/assimp/blob/master/Build.md file. We are available in vcpkg, and our build system is CMake; if you used CMake before there is a good chance you know what to do.
+Start by reading [our build instructions](https://github.com/assimp/assimp/blob/master/Build.md). We are available in vcpkg, and our build system is CMake; if you used CMake before there is a good chance you know what to do.
 
 ### Ports ###
 * [Android](port/AndroidJNI/README.md)
@@ -51,36 +52,31 @@ Take a look into the https://github.com/assimp/assimp/blob/master/Build.md file.
 
 ### Other tools ###
 [open3mod](https://github.com/acgessler/open3mod) is a powerful 3D model viewer based on Assimp's import and export abilities.
+[Assimp-Viewer](https://github.com/assimp/assimp_view) is an experimental implementation for an Asset-Viewer based on ImGUI and Assimp (experimental).
 
 #### Repository structure ####
-Open Asset Import Library is implemented in C++. The directory structure looks like:
+Open Asset Import Library is implemented in C++. The directory structure looks like this:
 
 	/code		Source code
 	/contrib	Third-party libraries
 	/doc		Documentation (doxysource and pre-compiled docs)
+	/fuzz           Contains the test code for the Google Fuzzer project
 	/include	Public header C and C++ header files
-	/scripts 	Scripts used to generate the loading code for some formats
+	/scripts 	Scripts are used to generate the loading code for some formats
 	/port		Ports to other languages and scripts to maintain those.
 	/test		Unit- and regression tests, test suite of models
 	/tools		Tools (old assimp viewer, command line `assimp`)
-	/samples	A small number of samples to illustrate possible
-                        use cases for Assimp
+	/samples	A small number of samples to illustrate possible use cases for Assimp
 
 The source code is organized in the following way:
 
 	code/Common			The base implementation for importers and the infrastructure
+	code/CApi                       Special implementations which are only used for the C-API
+	code/Geometry                   A collection of geometry tools
+	code/Material                   The material system
+	code/PBR                        An exporter for physical-based models
 	code/PostProcessing		The post-processing steps
-	code/AssetLib/<FormatName>	Implementation for import and export for the format
-
-### Where to get help ###
-For more information, visit [our website](http://assimp.org/). Or check out the `./doc`- folder, which contains the official documentation in HTML format.
-(CHMs for Windows are included in some release packages and should be located right here in the root folder).
-
-If the docs don't solve your problem, ask on [StackOverflow with the assimp-tag](http://stackoverflow.com/questions/tagged/assimp?sort=newest). If you think you found a bug, please open an issue on Github.
-
-Open Asset Import Library is a library to load various 3d file formats into a shared, in-memory format. It supports more than __40 file formats__ for import and a growing selection of file formats for export.
-
-And we also have a Gitter-channel:Gitter [![Join the chat at https://gitter.im/assimp/assimp](https://badges.gitter.im/assimp/assimp.svg)](https://gitter.im/assimp/assimp?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)<br>
+	code/AssetLib/<FormatName>	Implementation for import and export of the format
 
 ### Contributing ###
 Contributions to assimp are highly appreciated. The easiest way to get involved is to submit
@@ -117,4 +113,4 @@ and don't sue us if our code doesn't work. Note that, unlike LGPLed code, you ma
 For the legal details, see the `LICENSE` file.
 
 ### Why this name ###
-Sorry, we're germans :-), no english native speakers ...
+Sorry, we're germans :-), no English native speakers ...

SECURITY.md

@@ -0,0 +1,16 @@
+# Security Policy
+
+## Supported Versions
+
+Use this section to tell people about which versions of your project are
+currently being supported with security updates.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 5.2.4   | :white_check_mark: |
+
+## Reporting a Vulnerability
+
+If you have found any security vulnerability you can contact us via 
+kim.kulling@googlemail.com
+

cmake-modules/FindDirectX.cmake

@@ -55,7 +55,7 @@ if(WIN32) # The only platform it makes sense to check for DirectX SDK
   endif(CMAKE_CL_64)
   find_library(DirectX_LIBRARY NAMES d3d9 HINTS ${DirectX_LIB_SEARCH_PATH} PATH_SUFFIXES ${DirectX_LIBPATH_SUFFIX})
   find_library(DirectX_D3DX9_LIBRARY NAMES d3dx9 HINTS ${DirectX_LIB_SEARCH_PATH} PATH_SUFFIXES ${DirectX_LIBPATH_SUFFIX})
-  find_library(DirectX_DXERR_LIBRARY NAMES DxErr HINTS ${DirectX_LIB_SEARCH_PATH} PATH_SUFFIXES ${DirectX_LIBPATH_SUFFIX})
+  find_library(DirectX_DXERR_LIBRARY NAMES DxErr DxErr9 HINTS ${DirectX_LIB_SEARCH_PATH} PATH_SUFFIXES ${DirectX_LIBPATH_SUFFIX})
   find_library(DirectX_DXGUID_LIBRARY NAMES dxguid HINTS ${DirectX_LIB_SEARCH_PATH} PATH_SUFFIXES ${DirectX_LIBPATH_SUFFIX})
 
 

cmake-modules/FindPkgMacros.cmake

@@ -54,7 +54,7 @@ macro(clear_if_changed TESTVAR)
       set(${var} "NOTFOUND" CACHE STRING "x" FORCE)
     endforeach(var)
   endif ()
-  set(${TESTVAR}_INT_CHECK ${${TESTVAR}} CACHE INTERNAL "x" FORCE)
+  set(${TESTVAR}_INT_CHECK "${${TESTVAR}}" CACHE INTERNAL "x" FORCE)
 endmacro(clear_if_changed)
 
 # Try to get some hints from pkg-config, if available

cmake-modules/HunterGate.cmake

@@ -22,38 +22,9 @@
 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-# This is a gate file to Hunter package manager.
-# Include this file using `include` command and add package you need, example:
-#
-#     cmake_minimum_required(VERSION 3.2)
-#
-#     include("cmake/HunterGate.cmake")
-#     HunterGate(
-#         URL "https://github.com/path/to/hunter/archive.tar.gz"
-#         SHA1 "798501e983f14b28b10cda16afa4de69eee1da1d"
-#     )
-#
-#     project(MyProject)
-#
-#     hunter_add_package(Foo)
-#     hunter_add_package(Boo COMPONENTS Bar Baz)
-#
-# Projects:
-#     * https://github.com/hunter-packages/gate/
-#     * https://github.com/ruslo/hunter
 
 option(HUNTER_ENABLED "Enable Hunter package manager support" ON)
 
-if(HUNTER_ENABLED)
-  if(CMAKE_VERSION VERSION_LESS "3.2")
-    message(
-        FATAL_ERROR
-        "At least CMake version 3.2 required for Hunter dependency management."
-        " Update CMake or set HUNTER_ENABLED to OFF."
-    )
-  endif()
-endif()
-
 include(CMakeParseArguments) # cmake_parse_arguments
 
 option(HUNTER_STATUS_PRINT "Print working status" ON)

code/AssetLib/3DS/3DSConverter.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -52,9 +52,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <cctype>
 #include <memory>
 
-using namespace Assimp;
+namespace Assimp {
 
-static const unsigned int NotSet = 0xcdcdcdcd;
+static constexpr unsigned int NotSet = 0xcdcdcdcd;
 
 // ------------------------------------------------------------------------------------------------
 // Setup final material indices, generae a default material if necessary
@@ -68,7 +68,7 @@ void Discreet3DSImporter::ReplaceDefaultMaterial() {
     unsigned int idx(NotSet);
     for (unsigned int i = 0; i < mScene->mMaterials.size(); ++i) {
         std::string s = mScene->mMaterials[i].mName;
-        for (char & it : s) {
+        for (char &it : s) {
             it = static_cast<char>(::tolower(static_cast<unsigned char>(it)));
         }
 
@@ -262,6 +262,7 @@ void Discreet3DSImporter::ConvertMaterial(D3DS::Material &oldMat,
         unsigned int iWire = 1;
         mat.AddProperty<int>((int *)&iWire, 1, AI_MATKEY_ENABLE_WIREFRAME);
     }
+        [[fallthrough]];
 
     case D3DS::Discreet3DS::Gouraud:
         eShading = aiShadingMode_Gouraud;
@@ -592,7 +593,7 @@ void Discreet3DSImporter::AddNodeToGraph(aiScene *pcSOut, aiNode *pcOut,
 
         // Cameras or lights define their transformation in their parent node and in the
         // corresponding light or camera chunks. However, we read and process the latter
-        // to to be able to return valid cameras/lights even if no scenegraph is given.
+        // to be able to return valid cameras/lights even if no scenegraph is given.
         for (unsigned int n = 0; n < pcSOut->mNumCameras; ++n) {
             if (pcSOut->mCameras[n]->mName == pcOut->mName) {
                 pcSOut->mCameras[n]->mLookAt = aiVector3D(0.f, 0.f, 1.f);
@@ -642,11 +643,17 @@ void Discreet3DSImporter::AddNodeToGraph(aiScene *pcSOut, aiNode *pcOut,
     }
 
     // Allocate storage for children
-    pcOut->mNumChildren = (unsigned int)pcIn->mChildren.size();
+    const unsigned int size = static_cast<unsigned int>(pcIn->mChildren.size());
+
+    pcOut->mNumChildren = size;
+    if (size == 0) {
+        return;
+    }
+
     pcOut->mChildren = new aiNode *[pcIn->mChildren.size()];
 
     // Recursively process all children
-    const unsigned int size = static_cast<unsigned int>(pcIn->mChildren.size());
+    
     for (unsigned int i = 0; i < size; ++i) {
         pcOut->mChildren[i] = new aiNode();
         pcOut->mChildren[i]->mParent = pcOut;
@@ -708,7 +715,7 @@ void Discreet3DSImporter::GenerateNodeGraph(aiScene *pcOut) {
             pcNode->mNumMeshes = 1;
 
             // Build a name for the node
-            pcNode->mName.length = ai_snprintf(pcNode->mName.data, MAXLEN, "3DSMesh_%u", i);
+            pcNode->mName.length = ai_snprintf(pcNode->mName.data, AI_MAXLEN, "3DSMesh_%u", i);
         }
 
         // Build dummy nodes for all cameras
@@ -804,4 +811,6 @@ void Discreet3DSImporter::ConvertScene(aiScene *pcOut) {
     }
 }
 
+} // namespace Assimp
+
 #endif // !! ASSIMP_BUILD_NO_3DS_IMPORTER

code/AssetLib/3DS/3DSExporter.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -52,6 +52,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/StringComparison.h>
 #include <assimp/DefaultLogger.hpp>
 #include <assimp/Exporter.hpp>
+#include <assimp/Exceptional.h>
 #include <assimp/IOSystem.hpp>
 
 #include <memory>
@@ -209,9 +210,7 @@ Discreet3DSExporter::Discreet3DSExporter(std::shared_ptr<IOStream> &outfile, con
 }
 
 // ------------------------------------------------------------------------------------------------
-Discreet3DSExporter::~Discreet3DSExporter() {
-    // empty
-}
+Discreet3DSExporter::~Discreet3DSExporter() = default;
 
 // ------------------------------------------------------------------------------------------------
 int Discreet3DSExporter::WriteHierarchy(const aiNode &node, int seq, int sibling_level) {

code/AssetLib/3DS/3DSExporter.h

@@ -2,8 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
-
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -57,8 +56,7 @@ struct aiNode;
 struct aiMaterial;
 struct aiMesh;
 
-namespace Assimp
-{
+namespace Assimp {
 
 // ------------------------------------------------------------------------------------------------
 /**
@@ -88,7 +86,7 @@ private:
 
     std::map<const aiNode*, aiMatrix4x4> trafos;
 
-    typedef std::multimap<const aiNode*, unsigned int> MeshesByNodeMap;
+    using MeshesByNodeMap = std::multimap<const aiNode*, unsigned int>;
     MeshesByNodeMap meshes;
 
 };

code/AssetLib/3DS/3DSHelper.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -322,7 +322,6 @@ struct Texture {
     //! Default constructor
     Texture() AI_NO_EXCEPT
             : mTextureBlend(0.0f),
-              mMapName(),
               mOffsetU(0.0),
               mOffsetV(0.0),
               mScaleU(1.0),
@@ -334,51 +333,11 @@ struct Texture {
         mTextureBlend = get_qnan();
     }
 
-    Texture(const Texture &other) :
-            mTextureBlend(other.mTextureBlend),
-            mMapName(other.mMapName),
-            mOffsetU(other.mOffsetU),
-            mOffsetV(other.mOffsetV),
-            mScaleU(other.mScaleU),
-            mScaleV(other.mScaleV),
-            mRotation(other.mRotation),
-            mMapMode(other.mMapMode),
-            bPrivate(other.bPrivate),
-            iUVSrc(other.iUVSrc) {
-        // empty
-    }
+    Texture(const Texture &other) = default;
 
-    Texture(Texture &&other) AI_NO_EXCEPT : mTextureBlend(other.mTextureBlend),
-                                            mMapName(std::move(other.mMapName)),
-                                            mOffsetU(other.mOffsetU),
-                                            mOffsetV(other.mOffsetV),
-                                            mScaleU(other.mScaleU),
-                                            mScaleV(other.mScaleV),
-                                            mRotation(other.mRotation),
-                                            mMapMode(other.mMapMode),
-                                            bPrivate(other.bPrivate),
-                                            iUVSrc(other.iUVSrc) {
-        // empty
-    }
+    Texture(Texture &&other) AI_NO_EXCEPT = default;
 
-    Texture &operator=(Texture &&other) AI_NO_EXCEPT {
-        if (this == &other) {
-            return *this;
-        }
-
-        mTextureBlend = other.mTextureBlend;
-        mMapName = std::move(other.mMapName);
-        mOffsetU = other.mOffsetU;
-        mOffsetV = other.mOffsetV;
-        mScaleU = other.mScaleU;
-        mScaleV = other.mScaleV;
-        mRotation = other.mRotation;
-        mMapMode = other.mMapMode;
-        bPrivate = other.bPrivate;
-        iUVSrc = other.iUVSrc;
-
-        return *this;
-    }
+    Texture &operator=(Texture &&other) AI_NO_EXCEPT = default;
 
     //! Specifies the blend factor for the texture
     ai_real mTextureBlend;
@@ -406,14 +365,13 @@ struct Texture {
 #ifdef _MSC_VER
 #pragma warning(pop)
 #endif // _MSC_VER
-
 // ---------------------------------------------------------------------------
 /** Helper structure representing a 3ds material */
 struct Material {
     //! Default constructor has been deleted
     Material() :
             mName(),
-            mDiffuse(ai_real(0.6), ai_real(0.6), ai_real(0.6)),
+            mDiffuse(0.6f, 0.6f, 0.6f),
             mSpecularExponent(ai_real(0.0)),
             mShininessStrength(ai_real(1.0)),
             mShading(Discreet3DS::Gouraud),
@@ -426,7 +384,7 @@ struct Material {
     //! Constructor with explicit name
     explicit Material(const std::string &name) :
             mName(name),
-            mDiffuse(ai_real(0.6), ai_real(0.6), ai_real(0.6)),
+            mDiffuse(0.6f, 0.6f, 0.6f),
             mSpecularExponent(ai_real(0.0)),
             mShininessStrength(ai_real(1.0)),
             mShading(Discreet3DS::Gouraud),
@@ -436,83 +394,9 @@ struct Material {
         // empty
     }
 
-    Material(const Material &other) :
-            mName(other.mName),
-            mDiffuse(other.mDiffuse),
-            mSpecularExponent(other.mSpecularExponent),
-            mShininessStrength(other.mShininessStrength),
-            mSpecular(other.mSpecular),
-            mAmbient(other.mAmbient),
-            mShading(other.mShading),
-            mTransparency(other.mTransparency),
-            sTexDiffuse(other.sTexDiffuse),
-            sTexOpacity(other.sTexOpacity),
-            sTexSpecular(other.sTexSpecular),
-            sTexReflective(other.sTexReflective),
-            sTexBump(other.sTexBump),
-            sTexEmissive(other.sTexEmissive),
-            sTexShininess(other.sTexShininess),
-            mBumpHeight(other.mBumpHeight),
-            mEmissive(other.mEmissive),
-            sTexAmbient(other.sTexAmbient),
-            mTwoSided(other.mTwoSided) {
-        // empty
-    }
+    Material(const Material &other) = default;
 
-    //! Move constructor. This is explicitly written because MSVC doesn't support defaulting it
-    Material(Material &&other) AI_NO_EXCEPT : mName(std::move(other.mName)),
-                                              mDiffuse(other.mDiffuse),
-                                              mSpecularExponent(other.mSpecularExponent),
-                                              mShininessStrength(other.mShininessStrength),
-                                              mSpecular(other.mSpecular),
-                                              mAmbient(other.mAmbient),
-                                              mShading(other.mShading),
-                                              mTransparency(other.mTransparency),
-                                              sTexDiffuse(std::move(other.sTexDiffuse)),
-                                              sTexOpacity(std::move(other.sTexOpacity)),
-                                              sTexSpecular(std::move(other.sTexSpecular)),
-                                              sTexReflective(std::move(other.sTexReflective)),
-                                              sTexBump(std::move(other.sTexBump)),
-                                              sTexEmissive(std::move(other.sTexEmissive)),
-                                              sTexShininess(std::move(other.sTexShininess)),
-                                              mBumpHeight(other.mBumpHeight),
-                                              mEmissive(other.mEmissive),
-                                              sTexAmbient(std::move(other.sTexAmbient)),
-                                              mTwoSided(other.mTwoSided) {
-        // empty
-    }
-
-    Material &operator=(Material &&other) AI_NO_EXCEPT {
-        if (this == &other) {
-            return *this;
-        }
-
-        mName = std::move(other.mName);
-        mDiffuse = other.mDiffuse;
-        mSpecularExponent = other.mSpecularExponent;
-        mShininessStrength = other.mShininessStrength,
-        mSpecular = other.mSpecular;
-        mAmbient = other.mAmbient;
-        mShading = other.mShading;
-        mTransparency = other.mTransparency;
-        sTexDiffuse = std::move(other.sTexDiffuse);
-        sTexOpacity = std::move(other.sTexOpacity);
-        sTexSpecular = std::move(other.sTexSpecular);
-        sTexReflective = std::move(other.sTexReflective);
-        sTexBump = std::move(other.sTexBump);
-        sTexEmissive = std::move(other.sTexEmissive);
-        sTexShininess = std::move(other.sTexShininess);
-        mBumpHeight = other.mBumpHeight;
-        mEmissive = other.mEmissive;
-        sTexAmbient = std::move(other.sTexAmbient);
-        mTwoSided = other.mTwoSided;
-
-        return *this;
-    }
-
-    virtual ~Material() {
-        // empty
-    }
+    virtual ~Material() = default;
 
     //! Name of the material
     std::string mName;

code/AssetLib/3DS/3DSLoader.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -54,9 +54,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/DefaultLogger.hpp>
 #include <assimp/IOSystem.hpp>
 
-using namespace Assimp;
+namespace Assimp {
 
-static const aiImporterDesc desc = {
+static constexpr aiImporterDesc desc = {
     "Discreet 3DS Importer",
     "",
     "",
@@ -103,28 +103,11 @@ Discreet3DSImporter::Discreet3DSImporter() :
     // empty
 }
 
-// ------------------------------------------------------------------------------------------------
-// Destructor, private as well
-Discreet3DSImporter::~Discreet3DSImporter() {
-    // empty
-}
-
 // ------------------------------------------------------------------------------------------------
 // Returns whether the class can handle the format of the given file.
-bool Discreet3DSImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const {
-    std::string extension = GetExtension(pFile);
-    if (extension == "3ds" || extension == "prj") {
-        return true;
-    }
-
-    if (!extension.length() || checkSig) {
-        uint16_t token[3];
-        token[0] = 0x4d4d;
-        token[1] = 0x3dc2;
-        //token[2] = 0x3daa;
-        return CheckMagicToken(pIOHandler, pFile, token, 2, 0, 2);
-    }
-    return false;
+bool Discreet3DSImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*checkSig*/) const {
+    static const uint16_t token[] = { 0x4d4d, 0x3dc2 /*, 0x3daa */ };
+    return CheckMagicToken(pIOHandler, pFile, token, AI_COUNT_OF(token), 0, sizeof token[0]);
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -279,8 +262,15 @@ void Discreet3DSImporter::ParseMainChunk() {
     };
 
     ASSIMP_3DS_END_CHUNK();
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunreachable-code-return"
+#endif
     // recursively continue processing this hierarchy level
     return ParseMainChunk();
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -330,7 +320,7 @@ void Discreet3DSImporter::ParseObjectChunk() {
     case Discreet3DS::CHUNK_MAT_MATERIAL:
 
         // Add a new material to the list
-        mScene->mMaterials.push_back(D3DS::Material(std::string("UNNAMED_" + ai_to_string(mScene->mMaterials.size()))));
+        mScene->mMaterials.emplace_back(std::string("UNNAMED_" + ai_to_string(mScene->mMaterials.size())));
         ParseMaterialChunk();
         break;
 
@@ -375,13 +365,13 @@ void Discreet3DSImporter::ParseChunk(const char *name, unsigned int num) {
     // IMPLEMENTATION NOTE;
     // Cameras or lights define their transformation in their parent node and in the
     // corresponding light or camera chunks. However, we read and process the latter
-    // to to be able to return valid cameras/lights even if no scenegraph is given.
+    // to be able to return valid cameras/lights even if no scenegraph is given.
 
     // get chunk type
     switch (chunk.Flag) {
     case Discreet3DS::CHUNK_TRIMESH: {
         // this starts a new triangle mesh
-        mScene->mMeshes.push_back(D3DS::Mesh(std::string(name, num)));
+        mScene->mMeshes.emplace_back(std::string(name, num));
 
         // Read mesh chunks
         ParseMeshChunk();
@@ -1010,7 +1000,7 @@ void Discreet3DSImporter::ParseMeshChunk() {
         mMesh.mFaces.reserve(num);
         while (num-- > 0) {
             // 3DS faces are ALWAYS triangles
-            mMesh.mFaces.push_back(D3DS::Face());
+            mMesh.mFaces.emplace_back();
             D3DS::Face &sFace = mMesh.mFaces.back();
 
             sFace.mIndices[0] = (uint16_t)stream->GetI2();
@@ -1295,7 +1285,7 @@ void Discreet3DSImporter::ParseColorChunk(aiColor3D *out, bool acceptPercent) {
     switch (chunk.Flag) {
     case Discreet3DS::CHUNK_LINRGBF:
         bGamma = true;
-
+    // fallthrough
     case Discreet3DS::CHUNK_RGBF:
         if (sizeof(float) * 3 > diff) {
             *out = clrError;
@@ -1308,6 +1298,7 @@ void Discreet3DSImporter::ParseColorChunk(aiColor3D *out, bool acceptPercent) {
 
     case Discreet3DS::CHUNK_LINRGBB:
         bGamma = true;
+            // fallthrough
     case Discreet3DS::CHUNK_RGBB: {
         if (sizeof(char) * 3 > diff) {
             *out = clrError;
@@ -1344,4 +1335,6 @@ void Discreet3DSImporter::ParseColorChunk(aiColor3D *out, bool acceptPercent) {
     (void)bGamma;
 }
 
+} // namespace Assimp
+
 #endif // !! ASSIMP_BUILD_NO_3DS_IMPORTER

code/AssetLib/3DS/3DSLoader.h

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -59,7 +59,6 @@ struct aiNode;
 
 namespace Assimp    {
 
-
 using namespace D3DS;
 
 // ---------------------------------------------------------------------------------
@@ -68,7 +67,7 @@ using namespace D3DS;
 class Discreet3DSImporter : public BaseImporter {
 public:
     Discreet3DSImporter();
-    ~Discreet3DSImporter();
+    ~Discreet3DSImporter() override = default;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.

code/AssetLib/3MF/3MFTypes.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -57,6 +57,7 @@ enum class ResourceType {
     RT_BaseMaterials,
     RT_EmbeddedTexture2D,
     RT_Texture2DGroup,
+    RT_ColorGroup,
     RT_Unknown
 }; // To be extended with other resource types (eg. material extension resources like Texture2d, Texture2dGroup...)
 
@@ -69,9 +70,7 @@ public:
         // empty
     }
 
-    virtual ~Resource() {
-        // empty
-    }
+    virtual ~Resource() = default;
 
     virtual ResourceType getType() const {
         return ResourceType::RT_Unknown;
@@ -95,7 +94,7 @@ public:
         // empty
     }
 
-    ~EmbeddedTexture() = default;
+    ~EmbeddedTexture() override = default;
 
     ResourceType getType() const override {
         return ResourceType::RT_EmbeddedTexture2D;
@@ -112,13 +111,28 @@ public:
         // empty
     }
 
-    ~Texture2DGroup() = default;
+    ~Texture2DGroup() override = default;
 
     ResourceType getType() const override {
         return ResourceType::RT_Texture2DGroup;
     }
 };
 
+class ColorGroup : public Resource {
+public:
+    std::vector<aiColor4D> mColors;
+    ColorGroup(int id) :
+            Resource(id){
+        // empty
+    }
+
+    ~ColorGroup() override = default;
+
+    ResourceType getType() const override {
+        return ResourceType::RT_ColorGroup;
+    }
+};
+
 class BaseMaterials : public Resource {
 public:
     std::vector<unsigned int> mMaterialIndex;
@@ -129,7 +143,7 @@ public:
         // empty
     }
 
-    ~BaseMaterials() = default;
+    ~BaseMaterials() override = default;
 
     ResourceType getType() const override {
         return ResourceType::RT_BaseMaterials;
@@ -154,7 +168,7 @@ public:
         // empty
     }
 
-    ~Object() = default;
+    ~Object() override = default;
 
     ResourceType getType() const override {
         return ResourceType::RT_Object;

code/AssetLib/3MF/3MFXmlTags.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -74,6 +74,8 @@ namespace XmlTag {
     const char* const pid = "pid";
     const char* const pindex = "pindex";
     const char* const p1 = "p1";
+    const char *const p2 = "p2";
+    const char *const p3 = "p3";
     const char* const name = "name";
     const char* const type = "type";
     const char* const build = "build";
@@ -96,6 +98,11 @@ namespace XmlTag {
     const char *const texture_cuurd_u = "u";
     const char *const texture_cuurd_v = "v";
 
+    // vertex color definitions
+    const char *const colorgroup = "m:colorgroup";
+    const char *const color_item = "m:color";
+    const char *const color_vaule = "color";
+
     // Meta info tags
     const char* const CONTENT_TYPES_ARCHIVE = "[Content_Types].xml";
     const char* const ROOT_RELATIONSHIPS_ARCHIVE = "_rels/.rels";

code/AssetLib/3MF/D3MFExporter.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -83,7 +83,7 @@ void ExportScene3MF(const char *pFile, IOSystem *pIOSystem, const aiScene *pScen
 namespace D3MF {
 
 D3MFExporter::D3MFExporter(const char *pFile, const aiScene *pScene) :
-        mArchiveName(pFile), m_zipArchive(nullptr), mScene(pScene), mModelOutput(), mRelOutput(), mContentOutput(), mBuildItems(), mRelations() {
+        mArchiveName(pFile), m_zipArchive(nullptr), mScene(pScene) {
     // empty
 }
 
@@ -249,10 +249,10 @@ void D3MFExporter::writeBaseMaterials() {
             if (color.r <= 1 && color.g <= 1 && color.b <= 1 && color.a <= 1) {
 
                 hexDiffuseColor = ai_rgba2hex(
-                        (int)((ai_real)color.r) * 255,
-                        (int)((ai_real)color.g) * 255,
-                        (int)((ai_real)color.b) * 255,
-                        (int)((ai_real)color.a) * 255,
+                        (int)(((ai_real)color.r) * 255),
+                        (int)(((ai_real)color.g) * 255),
+                        (int)(((ai_real)color.b) * 255),
+                        (int)(((ai_real)color.a) * 255),
                         true);
 
             } else {

code/AssetLib/3MF/D3MFExporter.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 

code/AssetLib/3MF/D3MFImporter.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -68,7 +68,7 @@ namespace Assimp {
 
 using namespace D3MF;
 
-static const aiImporterDesc desc = {
+static constexpr aiImporterDesc desc = {
     "3mf Importer",
     "",
     "",
@@ -81,33 +81,17 @@ static const aiImporterDesc desc = {
     "3mf"
 };
 
-D3MFImporter::D3MFImporter() :
-        BaseImporter() {
-    // empty
-}
-
-D3MFImporter::~D3MFImporter() {
-    // empty
-}
-
-bool D3MFImporter::CanRead(const std::string &filename, IOSystem *pIOHandler, bool checkSig) const {
-    const std::string extension(GetExtension(filename));
-    if (extension == desc.mFileExtensions) {
-        return true;
-    } 
-
-    if (!extension.length() || checkSig) {
-        if (nullptr == pIOHandler) {
-            return false;
-        }
-        if (!ZipArchiveIOSystem::isZipArchive(pIOHandler, filename)) {
-            return false;
-        }
-        D3MFOpcPackage opcPackage(pIOHandler, filename);
-        return opcPackage.validate();
+bool D3MFImporter::CanRead(const std::string &filename, IOSystem *pIOHandler, bool ) const {
+    if (!ZipArchiveIOSystem::isZipArchive(pIOHandler, filename)) {
+        return false;
+    }
+    static const char *const ModelRef = "3D/3dmodel.model";
+    ZipArchiveIOSystem archive(pIOHandler, filename);
+    if (!archive.Exists(ModelRef)) {
+        return false;
     }
 
-    return false;
+    return true;
 }
 
 void D3MFImporter::SetupProperties(const Importer*) {

code/AssetLib/3MF/D3MFImporter.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -56,10 +56,10 @@ namespace Assimp {
 class D3MFImporter : public BaseImporter {
 public:
     /// @brief The default class constructor.
-    D3MFImporter();
+    D3MFImporter() = default;
 
     ///	@brief  The class destructor.
-    ~D3MFImporter() override;
+    ~D3MFImporter() override = default;
 
     /// @brief Performs the data format detection.
     /// @param pFile        The filename to check.

code/AssetLib/3MF/D3MFOpcPackage.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -68,7 +68,7 @@ using OpcPackageRelationshipPtr = std::shared_ptr<OpcPackageRelationship>;
 class OpcPackageRelationshipReader {
 public:
     OpcPackageRelationshipReader(XmlParser &parser) :
-            m_relationShips() {
+            mRelations() {
         XmlNode root = parser.getRootNode();
         ParseRootNode(root);
     }
@@ -108,20 +108,20 @@ public:
                 relPtr->type = currentNode.attribute(XmlTag::RELS_ATTRIB_TYPE).as_string();
                 relPtr->target = currentNode.attribute(XmlTag::RELS_ATTRIB_TARGET).as_string();
                 if (validateRels(relPtr)) {
-                    m_relationShips.push_back(relPtr);
+                    mRelations.push_back(relPtr);
                 }
             }
         }
     }
 
-    std::vector<OpcPackageRelationshipPtr> m_relationShips;
+    std::vector<OpcPackageRelationshipPtr> mRelations;
 };
 
 static bool IsEmbeddedTexture( const std::string &filename ) {
     const std::string extension = BaseImporter::GetExtension(filename);
-    if (extension == "jpg" || extension == "png") {
+    if (extension == "jpg" || extension == "png" || extension == "jpeg") {
         std::string::size_type pos = filename.find("thumbnail");
-        if (pos == std::string::npos) {
+        if (pos != std::string::npos) {
             return false;
         }
         return true;
@@ -160,7 +160,7 @@ D3MFOpcPackage::D3MFOpcPackage(IOSystem *pIOHandler, const std::string &rFile) :
                     // deal with zip-bug
                     rootFile = rootFile.substr(1);
                 }
-            } 
+            }
 
             ASSIMP_LOG_VERBOSE_DEBUG(rootFile);
 
@@ -214,11 +214,11 @@ std::string D3MFOpcPackage::ReadPackageRootRelationship(IOStream *stream) {
 
     OpcPackageRelationshipReader reader(xmlParser);
 
-    auto itr = std::find_if(reader.m_relationShips.begin(), reader.m_relationShips.end(), [](const OpcPackageRelationshipPtr &rel) {
+    auto itr = std::find_if(reader.mRelations.begin(), reader.mRelations.end(), [](const OpcPackageRelationshipPtr &rel) {
         return rel->type == XmlTag::PACKAGE_START_PART_RELATIONSHIP_TYPE;
     });
 
-    if (itr == reader.m_relationShips.end()) {
+    if (itr == reader.mRelations.end()) {
         throw DeadlyImportError("Cannot find ", XmlTag::PACKAGE_START_PART_RELATIONSHIP_TYPE);
     }
 

code/AssetLib/3MF/D3MFOpcPackage.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 

code/AssetLib/3MF/XmlSerializer.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -44,19 +44,21 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "3MFTypes.h"
 #include <assimp/scene.h>
 
+#include <utility>
+
 namespace Assimp {
 namespace D3MF {
 
-static const int IdNotSet = -1;
+static constexpr int IdNotSet = -1;
 
 namespace {
 
-static const size_t ColRGBA_Len = 9;
-static const size_t ColRGB_Len = 7;
+static constexpr size_t ColRGBA_Len = 9;
+static constexpr size_t ColRGB_Len = 7;
 
 // format of the color string: #RRGGBBAA or #RRGGBB (3MF Core chapter 5.1.1)
-bool validateColorString(const char *color) {
-    const size_t len = strlen(color);
+bool validateColorString(const std::string color) {
+    const size_t len = color.size();
     if (ColRGBA_Len != len && ColRGB_Len != len) {
         return false;
     }
@@ -64,7 +66,7 @@ bool validateColorString(const char *color) {
     return true;
 }
 
-aiFace ReadTriangle(XmlNode &node) {
+aiFace ReadTriangle(XmlNode &node, int &texId0, int &texId1, int &texId2) {
     aiFace face;
 
     face.mNumIndices = 3;
@@ -73,6 +75,11 @@ aiFace ReadTriangle(XmlNode &node) {
     face.mIndices[1] = static_cast<unsigned int>(std::atoi(node.attribute(XmlTag::v2).as_string()));
     face.mIndices[2] = static_cast<unsigned int>(std::atoi(node.attribute(XmlTag::v3).as_string()));
 
+    texId0 = texId1 = texId2 = IdNotSet;
+    XmlParser::getIntAttribute(node, XmlTag::p1, texId0);
+    XmlParser::getIntAttribute(node, XmlTag::p2, texId1);
+    XmlParser::getIntAttribute(node, XmlTag::p3, texId2);
+
     return face;
 }
 
@@ -106,7 +113,7 @@ bool getNodeAttribute(const XmlNode &node, const std::string &attribute, int &va
     return false;
 }
 
-aiMatrix4x4 parseTransformMatrix(std::string matrixStr) {
+aiMatrix4x4 parseTransformMatrix(const std::string& matrixStr) {
     // split the string
     std::vector<float> numbers;
     std::string currentNumber;
@@ -150,8 +157,8 @@ aiMatrix4x4 parseTransformMatrix(std::string matrixStr) {
     return transformMatrix;
 }
 
-bool parseColor(const char *color, aiColor4D &diffuse) {
-    if (nullptr == color) {
+bool parseColor(const std::string &color, aiColor4D &diffuse) {
+    if (color.empty()) {
         return false;
     }
 
@@ -171,7 +178,7 @@ bool parseColor(const char *color, aiColor4D &diffuse) {
 
     char b[3] = { color[5], color[6], '\0' };
     diffuse.b = static_cast<ai_real>(strtol(b, nullptr, 16)) / ai_real(255.0);
-    const size_t len = strlen(color);
+    const size_t len = color.size();
     if (ColRGB_Len == len) {
         return true;
     }
@@ -209,7 +216,7 @@ void XmlSerializer::ImportXml(aiScene *scene) {
     if (nullptr == scene) {
         return;
     }
-    
+
     scene->mRootNode = new aiNode(XmlTag::RootTag);
     XmlNode node = mXmlParser->getRootNode().child(XmlTag::model);
     if (node.empty()) {
@@ -229,6 +236,8 @@ void XmlSerializer::ImportXml(aiScene *scene) {
             ReadBaseMaterials(currentNode);
         } else if (currentNodeName == XmlTag::meta) {
             ReadMetadata(currentNode);
+        } else if (currentNodeName == XmlTag::colorgroup) {
+            ReadColorGroup(currentNode);
         }
     }
     StoreMaterialsInScene(scene);
@@ -324,9 +333,49 @@ void XmlSerializer::ReadObject(XmlNode &node) {
 
             if (hasPid) {
                 auto it = mResourcesDictionnary.find(pid);
-                if (hasPindex && it != mResourcesDictionnary.end() && it->second->getType() == ResourceType::RT_BaseMaterials) {
-                    BaseMaterials *materials = static_cast<BaseMaterials *>(it->second);
-                    mesh->mMaterialIndex = materials->mMaterialIndex[pindex];
+                if (hasPindex && it != mResourcesDictionnary.end()) {
+                    if (it->second->getType() == ResourceType::RT_BaseMaterials) {
+                        BaseMaterials *materials = static_cast<BaseMaterials *>(it->second);
+                        mesh->mMaterialIndex = materials->mMaterialIndex[pindex];
+                    } else if (it->second->getType() == ResourceType::RT_Texture2DGroup) {
+                        Texture2DGroup *group = static_cast<Texture2DGroup *>(it->second);
+                        if (mesh->mTextureCoords[0] == nullptr) {
+                            mesh->mNumUVComponents[0] = 2;
+                            for (unsigned int i = 1; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
+                                mesh->mNumUVComponents[i] = 0;
+                            }
+
+                            const std::string name = ai_to_string(group->mTexId);
+                            for (size_t i = 0; i < mMaterials.size(); ++i) {
+                                if (name == mMaterials[i]->GetName().C_Str()) {
+                                    mesh->mMaterialIndex = static_cast<unsigned int>(i);
+                                }
+                            }
+
+                            mesh->mTextureCoords[0] = new aiVector3D[mesh->mNumVertices];
+                            for (unsigned int vertex_idx = 0; vertex_idx < mesh->mNumVertices; vertex_idx++) {
+                                mesh->mTextureCoords[0][vertex_idx] =
+                                        aiVector3D(group->mTex2dCoords[pindex].x, group->mTex2dCoords[pindex].y, 0.0f);
+                            }
+                        } else {
+                            for (unsigned int vertex_idx = 0; vertex_idx < mesh->mNumVertices; vertex_idx++) {
+                                if (mesh->mTextureCoords[0][vertex_idx].z < 0) {
+                                    // use default
+                                    mesh->mTextureCoords[0][vertex_idx] =
+                                            aiVector3D(group->mTex2dCoords[pindex].x, group->mTex2dCoords[pindex].y, 0.0f);
+                                }
+                            }
+                        }
+                    }else if (it->second->getType() == ResourceType::RT_ColorGroup) {
+                        if (mesh->mColors[0] == nullptr) {
+                            mesh->mColors[0] = new aiColor4D[mesh->mNumVertices];
+
+                            ColorGroup *group = static_cast<ColorGroup *>(it->second);
+                            for (unsigned int vertex_idx = 0; vertex_idx < mesh->mNumVertices; vertex_idx++) {
+                                mesh->mColors[0][vertex_idx] = group->mColors[pindex];
+                            }
+                        }
+                    }
                 }
             }
 
@@ -408,35 +457,81 @@ void XmlSerializer::ImportTriangles(XmlNode &node, aiMesh *mesh) {
     for (XmlNode &currentNode : node.children()) {
         const std::string currentName = currentNode.name();
         if (currentName == XmlTag::triangle) {
-            int pid = IdNotSet, p1 = IdNotSet;
+            int pid = IdNotSet;
             bool hasPid = getNodeAttribute(currentNode, D3MF::XmlTag::pid, pid);
-            bool hasP1 = getNodeAttribute(currentNode, D3MF::XmlTag::p1, p1);
 
-            if (hasPid && hasP1) {
+            int pindex[3];
+            aiFace face = ReadTriangle(currentNode, pindex[0], pindex[1], pindex[2]);
+            if (hasPid && (pindex[0] != IdNotSet || pindex[1] != IdNotSet || pindex[2] != IdNotSet)) {
                 auto it = mResourcesDictionnary.find(pid);
                 if (it != mResourcesDictionnary.end()) {
                     if (it->second->getType() == ResourceType::RT_BaseMaterials) {
                         BaseMaterials *baseMaterials = static_cast<BaseMaterials *>(it->second);
-                        mesh->mMaterialIndex = baseMaterials->mMaterialIndex[p1];
+
+                        auto update_material = [&](int idx) {
+                            if (pindex[idx] != IdNotSet) {
+                                mesh->mMaterialIndex = baseMaterials->mMaterialIndex[pindex[idx]];
+                            }
+                        };
+
+                        update_material(0);
+                        update_material(1);
+                        update_material(2);
+
                     } else if (it->second->getType() == ResourceType::RT_Texture2DGroup) {
+                        // Load texture coordinates into mesh, when any
+                        Texture2DGroup *group = static_cast<Texture2DGroup *>(it->second); // fix bug
                         if (mesh->mTextureCoords[0] == nullptr) {
-                            Texture2DGroup *group = static_cast<Texture2DGroup *>(it->second);
+                            mesh->mNumUVComponents[0] = 2;
+                            for (unsigned int i = 1; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
+                                mesh->mNumUVComponents[i] = 0;
+                            }
+
                             const std::string name = ai_to_string(group->mTexId);
                             for (size_t i = 0; i < mMaterials.size(); ++i) {
                                 if (name == mMaterials[i]->GetName().C_Str()) {
                                     mesh->mMaterialIndex = static_cast<unsigned int>(i);
                                 }
                             }
-                            mesh->mTextureCoords[0] = new aiVector3D[group->mTex2dCoords.size()];
-                            for (unsigned int i = 0; i < group->mTex2dCoords.size(); ++i) {
-                                mesh->mTextureCoords[0][i] = aiVector3D(group->mTex2dCoords[i].x, group->mTex2dCoords[i].y, 0);
+                            mesh->mTextureCoords[0] = new aiVector3D[mesh->mNumVertices];
+                            for (unsigned int vertex_index = 0; vertex_index < mesh->mNumVertices; vertex_index++) {
+                                mesh->mTextureCoords[0][vertex_index].z = IdNotSet;//mark not set
                             }
                         }
-                    } 
+
+                        auto update_texture = [&](int idx) {
+                            if (pindex[idx] != IdNotSet) {
+                                size_t vertex_index = face.mIndices[idx];
+                                mesh->mTextureCoords[0][vertex_index] =
+                                        aiVector3D(group->mTex2dCoords[pindex[idx]].x, group->mTex2dCoords[pindex[idx]].y, 0.0f);
+                            }
+                        };
+
+                        update_texture(0);
+                        update_texture(1);
+                        update_texture(2);
+
+                    } else if (it->second->getType() == ResourceType::RT_ColorGroup) {
+                        // Load vertex color into mesh, when any
+                        ColorGroup *group = static_cast<ColorGroup *>(it->second);
+                        if (mesh->mColors[0] == nullptr) {
+                            mesh->mColors[0] = new aiColor4D[mesh->mNumVertices];
+                        }
+
+                        auto update_color = [&](int idx) {
+                            if (pindex[idx] != IdNotSet) {
+                                size_t vertex_index = face.mIndices[idx];
+                                mesh->mColors[0][vertex_index] = group->mColors[pindex[idx]];
+                            }
+                        };
+
+                        update_color(0);
+                        update_color(1);
+                        update_color(2);
+                    }
                 }
             }
 
-            aiFace face = ReadTriangle(currentNode);
             faces.push_back(face);
         }
     }
@@ -563,7 +658,7 @@ aiMaterial *XmlSerializer::readMaterialDef(XmlNode &node, unsigned int basemater
     stdMaterialName += strId;
     stdMaterialName += "_";
     if (hasName) {
-        stdMaterialName += std::string(name);
+        stdMaterialName += name;
     } else {
         stdMaterialName += "basemat_";
         stdMaterialName += ai_to_string(mMaterials.size());
@@ -577,12 +672,48 @@ aiMaterial *XmlSerializer::readMaterialDef(XmlNode &node, unsigned int basemater
     return material;
 }
 
+void XmlSerializer::ReadColor(XmlNode &node, ColorGroup *colorGroup) {
+    if (node.empty() || nullptr == colorGroup) {
+        return;
+    }
+
+    for (XmlNode currentNode : node.children()) {
+        const std::string currentName = currentNode.name();
+        if (currentName == XmlTag::color_item) {
+            const char *color = currentNode.attribute(XmlTag::color_vaule).as_string();
+            aiColor4D color_value;
+            if (parseColor(color, color_value)) {
+                colorGroup->mColors.push_back(color_value);
+            }
+        }
+    }
+}
+
+void XmlSerializer::ReadColorGroup(XmlNode &node) {
+    if (node.empty()) {
+        return;
+    }
+
+    int id = IdNotSet;
+    if (!XmlParser::getIntAttribute(node, XmlTag::id, id)) {
+        return;
+    }
+
+    ColorGroup *group = new ColorGroup(id);
+    ReadColor(node, group);
+    mResourcesDictionnary.insert(std::make_pair(id, group));
+}
+
 void XmlSerializer::StoreMaterialsInScene(aiScene *scene) {
-    if (nullptr == scene || mMaterials.empty()) {
+    if (nullptr == scene) {
         return;
     }
 
     scene->mNumMaterials = static_cast<unsigned int>(mMaterials.size());
+    if (scene->mNumMaterials == 0) {
+        return;
+    }
+
     scene->mMaterials = new aiMaterial *[scene->mNumMaterials];
     for (size_t i = 0; i < mMaterials.size(); ++i) {
         scene->mMaterials[i] = mMaterials[i];

code/AssetLib/3MF/XmlSerializer.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -57,6 +57,7 @@ class D3MFOpcPackage;
 class Object;
 class Texture2DGroup;
 class EmbeddedTexture;
+class ColorGroup;
 
 class XmlSerializer {
 public:
@@ -78,6 +79,8 @@ private:
     void ReadTextureGroup(XmlNode &node);
     aiMaterial *readMaterialDef(XmlNode &node, unsigned int basematerialsId);
     void StoreMaterialsInScene(aiScene *scene);
+    void ReadColorGroup(XmlNode &node);
+    void ReadColor(XmlNode &node, ColorGroup *colorGroup);
 
 private:
     struct MetaEntry {

code/AssetLib/AC/ACLoader.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -60,9 +60,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/Importer.hpp>
 #include <memory>
 
-using namespace Assimp;
+namespace Assimp {
 
-static const aiImporterDesc desc = {
+static constexpr aiImporterDesc desc = {
     "AC3D Importer",
     "",
     "",
@@ -77,8 +77,8 @@ static const aiImporterDesc desc = {
 
 // ------------------------------------------------------------------------------------------------
 // skip to the next token
-inline const char *AcSkipToNextToken(const char *buffer) {
-    if (!SkipSpaces(&buffer)) {
+inline const char *AcSkipToNextToken(const char *buffer, const char *end) {
+    if (!SkipSpaces(&buffer, end)) {
         ASSIMP_LOG_ERROR("AC3D: Unexpected EOF/EOL");
     }
     return buffer;
@@ -86,13 +86,13 @@ inline const char *AcSkipToNextToken(const char *buffer) {
 
 // ------------------------------------------------------------------------------------------------
 // read a string (may be enclosed in double quotation marks). buffer must point to "
-inline const char *AcGetString(const char *buffer, std::string &out) {
+inline const char *AcGetString(const char *buffer, const char *end, std::string &out) {
     if (*buffer == '\0') {
         throw DeadlyImportError("AC3D: Unexpected EOF in string");
     }
     ++buffer;
     const char *sz = buffer;
-    while ('\"' != *buffer) {
+    while ('\"' != *buffer && buffer != end) {
         if (IsLineEnd(*buffer)) {
             ASSIMP_LOG_ERROR("AC3D: Unexpected EOF/EOL in string");
             out = "ERROR";
@@ -112,8 +112,8 @@ inline const char *AcGetString(const char *buffer, std::string &out) {
 // ------------------------------------------------------------------------------------------------
 // read 1 to n floats prefixed with an optional predefined identifier
 template <class T>
-inline const char *TAcCheckedLoadFloatArray(const char *buffer, const char *name, size_t name_length, size_t num, T *out) {
-    buffer = AcSkipToNextToken(buffer);
+inline const char *TAcCheckedLoadFloatArray(const char *buffer, const char *end, const char *name, size_t name_length, size_t num, T *out) {
+    buffer = AcSkipToNextToken(buffer, end);
     if (0 != name_length) {
         if (0 != strncmp(buffer, name, name_length) || !IsSpace(buffer[name_length])) {
             ASSIMP_LOG_ERROR("AC3D: Unexpected token. ", name, " was expected.");
@@ -122,7 +122,7 @@ inline const char *TAcCheckedLoadFloatArray(const char *buffer, const char *name
         buffer += name_length + 1;
     }
     for (unsigned int _i = 0; _i < num; ++_i) {
-        buffer = AcSkipToNextToken(buffer);
+        buffer = AcSkipToNextToken(buffer, end);
         buffer = fast_atoreal_move<float>(buffer, ((float *)out)[_i]);
     }
 
@@ -132,7 +132,7 @@ inline const char *TAcCheckedLoadFloatArray(const char *buffer, const char *name
 // ------------------------------------------------------------------------------------------------
 // Constructor to be privately used by Importer
 AC3DImporter::AC3DImporter() :
-        buffer(),
+        mBuffer(),
         configSplitBFCull(),
         configEvalSubdivision(),
         mNumMeshes(),
@@ -146,24 +146,13 @@ AC3DImporter::AC3DImporter() :
 
 // ------------------------------------------------------------------------------------------------
 // Destructor, private as well
-AC3DImporter::~AC3DImporter() {
-    // nothing to be done here
-}
+AC3DImporter::~AC3DImporter() = default;
 
 // ------------------------------------------------------------------------------------------------
 // Returns whether the class can handle the format of the given file.
-bool AC3DImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const {
-    std::string extension = GetExtension(pFile);
-
-    // fixme: are acc and ac3d *really* used? Some sources say they are
-    if (extension == "ac" || extension == "ac3d" || extension == "acc") {
-        return true;
-    }
-    if (!extension.length() || checkSig) {
-        uint32_t token = AI_MAKE_MAGIC("AC3D");
-        return CheckMagicToken(pIOHandler, pFile, &token, 1, 0);
-    }
-    return false;
+bool AC3DImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*checkSig*/) const {
+    static const uint32_t tokens[] = { AI_MAKE_MAGIC("AC3D") };
+    return CheckMagicToken(pIOHandler, pFile, tokens, AI_COUNT_OF(tokens));
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -175,25 +164,25 @@ const aiImporterDesc *AC3DImporter::GetInfo() const {
 // ------------------------------------------------------------------------------------------------
 // Get a pointer to the next line from the file
 bool AC3DImporter::GetNextLine() {
-    SkipLine(&buffer);
-    return SkipSpaces(&buffer);
+    SkipLine(&mBuffer.data, mBuffer.end);
+    return SkipSpaces(&mBuffer.data, mBuffer.end);
 }
 
 // ------------------------------------------------------------------------------------------------
 // Parse an object section in an AC file
-void AC3DImporter::LoadObjectSection(std::vector<Object> &objects) {
-    if (!TokenMatch(buffer, "OBJECT", 6))
-        return;
+bool AC3DImporter::LoadObjectSection(std::vector<Object> &objects) {
+    if (!TokenMatch(mBuffer.data, "OBJECT", 6))
+        return false;
 
-    SkipSpaces(&buffer);
+    SkipSpaces(&mBuffer.data, mBuffer.end);
 
     ++mNumMeshes;
 
-    objects.push_back(Object());
+    objects.emplace_back();
     Object &obj = objects.back();
 
     aiLight *light = nullptr;
-    if (!ASSIMP_strincmp(buffer, "light", 5)) {
+    if (!ASSIMP_strincmp(mBuffer.data, "light", 5)) {
         // This is a light source. Add it to the list
         mLights->push_back(light = new aiLight());
 
@@ -204,65 +193,71 @@ void AC3DImporter::LoadObjectSection(std::vector<Object> &objects) {
 
         // Generate a default name for both the light source and the node
         // FIXME - what's the right way to print a size_t? Is 'zu' universally available? stick with the safe version.
-        light->mName.length = ::ai_snprintf(light->mName.data, MAXLEN, "ACLight_%i", static_cast<unsigned int>(mLights->size()) - 1);
+        light->mName.length = ::ai_snprintf(light->mName.data, AI_MAXLEN, "ACLight_%i", static_cast<unsigned int>(mLights->size()) - 1);
         obj.name = std::string(light->mName.data);
 
         ASSIMP_LOG_VERBOSE_DEBUG("AC3D: Light source encountered");
         obj.type = Object::Light;
-    } else if (!ASSIMP_strincmp(buffer, "group", 5)) {
+    } else if (!ASSIMP_strincmp(mBuffer.data, "group", 5)) {
         obj.type = Object::Group;
-    } else if (!ASSIMP_strincmp(buffer, "world", 5)) {
+    } else if (!ASSIMP_strincmp(mBuffer.data, "world", 5)) {
         obj.type = Object::World;
     } else
         obj.type = Object::Poly;
     while (GetNextLine()) {
-        if (TokenMatch(buffer, "kids", 4)) {
-            SkipSpaces(&buffer);
-            unsigned int num = strtoul10(buffer, &buffer);
+        if (TokenMatch(mBuffer.data, "kids", 4)) {
+            SkipSpaces(&mBuffer.data, mBuffer.end);
+            unsigned int num = strtoul10(mBuffer.data, &mBuffer.data);
             GetNextLine();
             if (num) {
                 // load the children of this object recursively
                 obj.children.reserve(num);
-                for (unsigned int i = 0; i < num; ++i)
-                    LoadObjectSection(obj.children);
+                for (unsigned int i = 0; i < num; ++i) {
+                    if (!LoadObjectSection(obj.children)) {
+                        ASSIMP_LOG_WARN("AC3D: wrong number of kids");
+                        break;
+                    }
+                }
             }
-            return;
-        } else if (TokenMatch(buffer, "name", 4)) {
-            SkipSpaces(&buffer);
-            buffer = AcGetString(buffer, obj.name);
+            return true;
+        } else if (TokenMatch(mBuffer.data, "name", 4)) {
+            SkipSpaces(&mBuffer.data, mBuffer.data);
+            mBuffer.data = AcGetString(mBuffer.data, mBuffer.end, obj.name);
 
             // If this is a light source, we'll also need to store
             // the name of the node in it.
             if (light) {
                 light->mName.Set(obj.name);
             }
-        } else if (TokenMatch(buffer, "texture", 7)) {
-            SkipSpaces(&buffer);
-            buffer = AcGetString(buffer, obj.texture);
-        } else if (TokenMatch(buffer, "texrep", 6)) {
-            SkipSpaces(&buffer);
-            buffer = TAcCheckedLoadFloatArray(buffer, "", 0, 2, &obj.texRepeat);
+        } else if (TokenMatch(mBuffer.data, "texture", 7)) {
+            SkipSpaces(&mBuffer.data, mBuffer.end);
+            std::string texture;
+            mBuffer.data = AcGetString(mBuffer.data, mBuffer.end, texture);
+            obj.textures.push_back(texture);
+        } else if (TokenMatch(mBuffer.data, "texrep", 6)) {
+            SkipSpaces(&mBuffer.data, mBuffer.end);
+            mBuffer.data = TAcCheckedLoadFloatArray(mBuffer.data, mBuffer.end, "", 0, 2, &obj.texRepeat);
             if (!obj.texRepeat.x || !obj.texRepeat.y)
                 obj.texRepeat = aiVector2D(1.f, 1.f);
-        } else if (TokenMatch(buffer, "texoff", 6)) {
-            SkipSpaces(&buffer);
-            buffer = TAcCheckedLoadFloatArray(buffer, "", 0, 2, &obj.texOffset);
-        } else if (TokenMatch(buffer, "rot", 3)) {
-            SkipSpaces(&buffer);
-            buffer = TAcCheckedLoadFloatArray(buffer, "", 0, 9, &obj.rotation);
-        } else if (TokenMatch(buffer, "loc", 3)) {
-            SkipSpaces(&buffer);
-            buffer = TAcCheckedLoadFloatArray(buffer, "", 0, 3, &obj.translation);
-        } else if (TokenMatch(buffer, "subdiv", 6)) {
-            SkipSpaces(&buffer);
-            obj.subDiv = strtoul10(buffer, &buffer);
-        } else if (TokenMatch(buffer, "crease", 6)) {
-            SkipSpaces(&buffer);
-            obj.crease = fast_atof(buffer);
-        } else if (TokenMatch(buffer, "numvert", 7)) {
-            SkipSpaces(&buffer);
+        } else if (TokenMatch(mBuffer.data, "texoff", 6)) {
+            SkipSpaces(&mBuffer.data, mBuffer.end);
+            mBuffer.data = TAcCheckedLoadFloatArray(mBuffer.data, mBuffer.end, "", 0, 2, &obj.texOffset);
+        } else if (TokenMatch(mBuffer.data, "rot", 3)) {
+            SkipSpaces(&mBuffer.data, mBuffer.end);
+            mBuffer.data = TAcCheckedLoadFloatArray(mBuffer.data, mBuffer.end, "", 0, 9, &obj.rotation);
+        } else if (TokenMatch(mBuffer.data, "loc", 3)) {
+            SkipSpaces(&mBuffer.data, mBuffer.end);
+            mBuffer.data = TAcCheckedLoadFloatArray(mBuffer.data, mBuffer.end, "", 0, 3, &obj.translation);
+        } else if (TokenMatch(mBuffer.data, "subdiv", 6)) {
+            SkipSpaces(&mBuffer.data, mBuffer.end);
+            obj.subDiv = strtoul10(mBuffer.data, &mBuffer.data);
+        } else if (TokenMatch(mBuffer.data, "crease", 6)) {
+            SkipSpaces(&mBuffer.data, mBuffer.end);
+            obj.crease = fast_atof(mBuffer.data);
+        } else if (TokenMatch(mBuffer.data, "numvert", 7)) {
+            SkipSpaces(&mBuffer.data, mBuffer.end);
 
-            unsigned int t = strtoul10(buffer, &buffer);
+            unsigned int t = strtoul10(mBuffer.data, &mBuffer.data);
             if (t >= AI_MAX_ALLOC(aiVector3D)) {
                 throw DeadlyImportError("AC3D: Too many vertices, would run out of memory");
             }
@@ -271,59 +266,59 @@ void AC3DImporter::LoadObjectSection(std::vector<Object> &objects) {
                 if (!GetNextLine()) {
                     ASSIMP_LOG_ERROR("AC3D: Unexpected EOF: not all vertices have been parsed yet");
                     break;
-                } else if (!IsNumeric(*buffer)) {
+                } else if (!IsNumeric(*mBuffer.data)) {
                     ASSIMP_LOG_ERROR("AC3D: Unexpected token: not all vertices have been parsed yet");
-                    --buffer; // make sure the line is processed a second time
+                    --mBuffer.data; // make sure the line is processed a second time
                     break;
                 }
-                obj.vertices.push_back(aiVector3D());
+                obj.vertices.emplace_back();
                 aiVector3D &v = obj.vertices.back();
-                buffer = TAcCheckedLoadFloatArray(buffer, "", 0, 3, &v.x);
+                mBuffer.data = TAcCheckedLoadFloatArray(mBuffer.data, mBuffer.end, "", 0, 3, &v.x);
             }
-        } else if (TokenMatch(buffer, "numsurf", 7)) {
-            SkipSpaces(&buffer);
+        } else if (TokenMatch(mBuffer.data, "numsurf", 7)) {
+            SkipSpaces(&mBuffer.data, mBuffer.end);
 
             bool Q3DWorkAround = false;
 
-            const unsigned int t = strtoul10(buffer, &buffer);
+            const unsigned int t = strtoul10(mBuffer.data, &mBuffer.data);
             obj.surfaces.reserve(t);
             for (unsigned int i = 0; i < t; ++i) {
                 GetNextLine();
-                if (!TokenMatch(buffer, "SURF", 4)) {
+                if (!TokenMatch(mBuffer.data, "SURF", 4)) {
                     // FIX: this can occur for some files - Quick 3D for
                     // example writes no surf chunks
                     if (!Q3DWorkAround) {
                         ASSIMP_LOG_WARN("AC3D: SURF token was expected");
                         ASSIMP_LOG_VERBOSE_DEBUG("Continuing with Quick3D Workaround enabled");
                     }
-                    --buffer; // make sure the line is processed a second time
+                    --mBuffer.data; // make sure the line is processed a second time
                     // break; --- see fix notes above
 
                     Q3DWorkAround = true;
                 }
-                SkipSpaces(&buffer);
-                obj.surfaces.push_back(Surface());
+                SkipSpaces(&mBuffer.data, mBuffer.end);
+                obj.surfaces.emplace_back();
                 Surface &surf = obj.surfaces.back();
-                surf.flags = strtoul_cppstyle(buffer);
+                surf.flags = strtoul_cppstyle(mBuffer.data);
 
-                while (1) {
+                while (true) {
                     if (!GetNextLine()) {
                         throw DeadlyImportError("AC3D: Unexpected EOF: surface is incomplete");
                     }
-                    if (TokenMatch(buffer, "mat", 3)) {
-                        SkipSpaces(&buffer);
-                        surf.mat = strtoul10(buffer);
-                    } else if (TokenMatch(buffer, "refs", 4)) {
+                    if (TokenMatch(mBuffer.data, "mat", 3)) {
+                        SkipSpaces(&mBuffer.data, mBuffer.end);
+                        surf.mat = strtoul10(mBuffer.data);
+                    } else if (TokenMatch(mBuffer.data, "refs", 4)) {
                         // --- see fix notes above
                         if (Q3DWorkAround) {
                             if (!surf.entries.empty()) {
-                                buffer -= 6;
+                                mBuffer.data -= 6;
                                 break;
                             }
                         }
 
-                        SkipSpaces(&buffer);
-                        const unsigned int m = strtoul10(buffer);
+                        SkipSpaces(&mBuffer.data, mBuffer.end);
+                        const unsigned int m = strtoul10(mBuffer.data);
                         surf.entries.reserve(m);
 
                         obj.numRefs += m;
@@ -333,15 +328,15 @@ void AC3DImporter::LoadObjectSection(std::vector<Object> &objects) {
                                 ASSIMP_LOG_ERROR("AC3D: Unexpected EOF: surface references are incomplete");
                                 break;
                             }
-                            surf.entries.push_back(Surface::SurfaceEntry());
+                            surf.entries.emplace_back();
                             Surface::SurfaceEntry &entry = surf.entries.back();
 
-                            entry.first = strtoul10(buffer, &buffer);
-                            SkipSpaces(&buffer);
-                            buffer = TAcCheckedLoadFloatArray(buffer, "", 0, 2, &entry.second);
+                            entry.first = strtoul10(mBuffer.data, &mBuffer.data);
+                            SkipSpaces(&mBuffer.data, mBuffer.end);
+                            mBuffer.data = TAcCheckedLoadFloatArray(mBuffer.data, mBuffer.end, "", 0, 2, &entry.second);
                         }
                     } else {
-                        --buffer; // make sure the line is processed a second time
+                        --mBuffer.data; // make sure the line is processed a second time
                         break;
                     }
                 }
@@ -349,6 +344,7 @@ void AC3DImporter::LoadObjectSection(std::vector<Object> &objects) {
         }
     }
     ASSIMP_LOG_ERROR("AC3D: Unexpected EOF: \'kids\' line was expected");
+    return false;
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -362,8 +358,8 @@ void AC3DImporter::ConvertMaterial(const Object &object,
         s.Set(matSrc.name);
         matDest.AddProperty(&s, AI_MATKEY_NAME);
     }
-    if (object.texture.length()) {
-        s.Set(object.texture);
+    if (!object.textures.empty()) {
+        s.Set(object.textures[0]);
         matDest.AddProperty(&s, AI_MATKEY_TEXTURE_DIFFUSE(0));
 
         // UV transformation
@@ -454,7 +450,7 @@ aiNode *AC3DImporter::ConvertObjectSection(Object &object,
                     idx = 0;
                 }
                 if ((*it).entries.empty()) {
-                    ASSIMP_LOG_WARN("AC3D: surface her zero vertex references");
+                    ASSIMP_LOG_WARN("AC3D: surface has zero vertex references");
                 }
 
                 // validate all vertex indices to make sure we won't crash here
@@ -472,16 +468,15 @@ aiNode *AC3DImporter::ConvertObjectSection(Object &object,
                 }
 
                 switch ((*it).GetType()) {
-                    // closed line
-                case Surface::ClosedLine:
-                    needMat[idx].first += (unsigned int)(*it).entries.size();
-                    needMat[idx].second += (unsigned int)(*it).entries.size() << 1u;
+                case Surface::ClosedLine: // closed line
+                    needMat[idx].first += static_cast<unsigned int>((*it).entries.size());
+                    needMat[idx].second += static_cast<unsigned int>((*it).entries.size() << 1u);
                     break;
 
                     // unclosed line
                 case Surface::OpenLine:
-                    needMat[idx].first += (unsigned int)(*it).entries.size() - 1;
-                    needMat[idx].second += ((unsigned int)(*it).entries.size() - 1) << 1u;
+                    needMat[idx].first += static_cast<unsigned int>((*it).entries.size() - 1);
+                    needMat[idx].second += static_cast<unsigned int>(((*it).entries.size() - 1) << 1u);
                     break;
 
                     // triangle strip
@@ -543,7 +538,7 @@ aiNode *AC3DImporter::ConvertObjectSection(Object &object,
                 // allocate UV coordinates, but only if the texture name for the
                 // surface is not empty
                 aiVector3D *uv = nullptr;
-                if (object.texture.length()) {
+                if (!object.textures.empty()) {
                     uv = mesh->mTextureCoords[0] = new aiVector3D[mesh->mNumVertices];
                     mesh->mNumUVComponents[0] = 2;
                 }
@@ -583,15 +578,6 @@ aiNode *AC3DImporter::ConvertObjectSection(Object &object,
                                 const Surface::SurfaceEntry &entry2 = src.entries[i + 1];
                                 const Surface::SurfaceEntry &entry3 = src.entries[i + 2];
 
-                                // skip degenerate triangles
-                                if (object.vertices[entry1.first] == object.vertices[entry2.first] ||
-                                        object.vertices[entry1.first] == object.vertices[entry3.first] ||
-                                        object.vertices[entry2.first] == object.vertices[entry3.first]) {
-                                    mesh->mNumFaces--;
-                                    mesh->mNumVertices -= 3;
-                                    continue;
-                                }
-
                                 aiFace &face = *faces++;
                                 face.mNumIndices = 3;
                                 face.mIndices = new unsigned int[face.mNumIndices];
@@ -710,18 +696,18 @@ aiNode *AC3DImporter::ConvertObjectSection(Object &object,
         // generate a name depending on the type of the node
         switch (object.type) {
         case Object::Group:
-            node->mName.length = ::ai_snprintf(node->mName.data, MAXLEN, "ACGroup_%i", mGroupsCounter++);
+            node->mName.length = ::ai_snprintf(node->mName.data, AI_MAXLEN, "ACGroup_%i", mGroupsCounter++);
             break;
         case Object::Poly:
-            node->mName.length = ::ai_snprintf(node->mName.data, MAXLEN, "ACPoly_%i", mPolysCounter++);
+            node->mName.length = ::ai_snprintf(node->mName.data, AI_MAXLEN, "ACPoly_%i", mPolysCounter++);
             break;
         case Object::Light:
-            node->mName.length = ::ai_snprintf(node->mName.data, MAXLEN, "ACLight_%i", mLightsCounter++);
+            node->mName.length = ::ai_snprintf(node->mName.data, AI_MAXLEN, "ACLight_%i", mLightsCounter++);
             break;
 
             // there shouldn't be more than one world, but we don't care
         case Object::World:
-            node->mName.length = ::ai_snprintf(node->mName.data, MAXLEN, "ACWorld_%i", mWorldsCounter++);
+            node->mName.length = ::ai_snprintf(node->mName.data, AI_MAXLEN, "ACWorld_%i", mWorldsCounter++);
             break;
         }
     }
@@ -761,7 +747,7 @@ void AC3DImporter::InternReadFile(const std::string &pFile,
     std::unique_ptr<IOStream> file(pIOHandler->Open(pFile, "rb"));
 
     // Check whether we can read from the file
-    if (file.get() == nullptr) {
+    if (file == nullptr) {
         throw DeadlyImportError("Failed to open AC3D file ", pFile, ".");
     }
 
@@ -769,17 +755,18 @@ void AC3DImporter::InternReadFile(const std::string &pFile,
     std::vector<char> mBuffer2;
     TextFileToBuffer(file.get(), mBuffer2);
 
-    buffer = &mBuffer2[0];
+    mBuffer.data = &mBuffer2[0];
+    mBuffer.end = &mBuffer2[0] + mBuffer2.size();
     mNumMeshes = 0;
 
     mLightsCounter = mPolysCounter = mWorldsCounter = mGroupsCounter = 0;
 
-    if (::strncmp(buffer, "AC3D", 4)) {
+    if (::strncmp(mBuffer.data, "AC3D", 4)) {
         throw DeadlyImportError("AC3D: No valid AC3D file, magic sequence not found");
     }
 
     // print the file format version to the console
-    unsigned int version = HexDigitToDecimal(buffer[4]);
+    unsigned int version = HexDigitToDecimal(mBuffer.data[4]);
     char msg[3];
     ASSIMP_itoa10(msg, 3, version);
     ASSIMP_LOG_INFO("AC3D file format version: ", msg);
@@ -794,35 +781,36 @@ void AC3DImporter::InternReadFile(const std::string &pFile,
     mLights = &lights;
 
     while (GetNextLine()) {
-        if (TokenMatch(buffer, "MATERIAL", 8)) {
-            materials.push_back(Material());
+        if (TokenMatch(mBuffer.data, "MATERIAL", 8)) {
+            materials.emplace_back();
             Material &mat = materials.back();
 
             // manually parse the material ... sscanf would use the buldin atof ...
             // Format: (name) rgb %f %f %f  amb %f %f %f  emis %f %f %f  spec %f %f %f  shi %d  trans %f
 
-            buffer = AcSkipToNextToken(buffer);
-            if ('\"' == *buffer) {
-                buffer = AcGetString(buffer, mat.name);
-                buffer = AcSkipToNextToken(buffer);
+            mBuffer.data = AcSkipToNextToken(mBuffer.data, mBuffer.end);
+            if ('\"' == *mBuffer.data) {
+                mBuffer.data = AcGetString(mBuffer.data, mBuffer.end, mat.name);
+                mBuffer.data = AcSkipToNextToken(mBuffer.data, mBuffer.end);
             }
 
-            buffer = TAcCheckedLoadFloatArray(buffer, "rgb", 3, 3, &mat.rgb);
-            buffer = TAcCheckedLoadFloatArray(buffer, "amb", 3, 3, &mat.amb);
-            buffer = TAcCheckedLoadFloatArray(buffer, "emis", 4, 3, &mat.emis);
-            buffer = TAcCheckedLoadFloatArray(buffer, "spec", 4, 3, &mat.spec);
-            buffer = TAcCheckedLoadFloatArray(buffer, "shi", 3, 1, &mat.shin);
-            buffer = TAcCheckedLoadFloatArray(buffer, "trans", 5, 1, &mat.trans);
+            mBuffer.data = TAcCheckedLoadFloatArray(mBuffer.data, mBuffer.end, "rgb", 3, 3, &mat.rgb);
+            mBuffer.data = TAcCheckedLoadFloatArray(mBuffer.data, mBuffer.end, "amb", 3, 3, &mat.amb);
+            mBuffer.data = TAcCheckedLoadFloatArray(mBuffer.data, mBuffer.end, "emis", 4, 3, &mat.emis);
+            mBuffer.data = TAcCheckedLoadFloatArray(mBuffer.data, mBuffer.end, "spec", 4, 3, &mat.spec);
+            mBuffer.data = TAcCheckedLoadFloatArray(mBuffer.data, mBuffer.end, "shi", 3, 1, &mat.shin);
+            mBuffer.data = TAcCheckedLoadFloatArray(mBuffer.data, mBuffer.end, "trans", 5, 1, &mat.trans);
+        } else {
+            LoadObjectSection(rootObjects);
         }
-        LoadObjectSection(rootObjects);
     }
 
-    if (rootObjects.empty() || !mNumMeshes) {
+    if (rootObjects.empty() || mNumMeshes == 0u) {
         throw DeadlyImportError("AC3D: No meshes have been loaded");
     }
     if (materials.empty()) {
         ASSIMP_LOG_WARN("AC3D: No material has been found");
-        materials.push_back(Material());
+        materials.emplace_back();
     }
 
     mNumMeshes += (mNumMeshes >> 2u) + 1;
@@ -833,7 +821,7 @@ void AC3DImporter::InternReadFile(const std::string &pFile,
     materials.reserve(mNumMeshes);
 
     // generate a dummy root if there are multiple objects on the top layer
-    Object *root;
+    Object *root = nullptr;
     if (1 == rootObjects.size())
         root = &rootObjects[0];
     else {
@@ -846,7 +834,7 @@ void AC3DImporter::InternReadFile(const std::string &pFile,
         delete root;
     }
 
-    if (!::strncmp(pScene->mRootNode->mName.data, "Node", 4)) {
+    if (::strncmp(pScene->mRootNode->mName.data, "Node", 4) == 0) {
         pScene->mRootNode->mName.Set("<AC3DWorld>");
     }
 
@@ -865,10 +853,12 @@ void AC3DImporter::InternReadFile(const std::string &pFile,
 
     // copy lights
     pScene->mNumLights = (unsigned int)lights.size();
-    if (lights.size()) {
+    if (!lights.empty()) {
         pScene->mLights = new aiLight *[lights.size()];
         ::memcpy(pScene->mLights, &lights[0], lights.size() * sizeof(void *));
     }
 }
 
+} // namespace Assimp
+
 #endif //!defined ASSIMP_BUILD_NO_AC_IMPORTER

code/AssetLib/AC/ACLoader.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -125,7 +125,6 @@ public:
                 type(World),
                 name(),
                 children(),
-                texture(),
                 texRepeat(1.f, 1.f),
                 texOffset(0.0f, 0.0f),
                 rotation(),
@@ -151,7 +150,8 @@ public:
         std::vector<Object> children;
 
         // texture to be assigned to all surfaces of the object
-        std::string texture;
+        // the .acc format supports up to 4 textures
+        std::vector<std::string> textures;
 
         // texture repat factors (scaling for all coordinates)
         aiVector2D texRepeat, texOffset;
@@ -216,7 +216,7 @@ private:
      *  load subobjects, the method returns after a 'kids 0' was
      *  encountered.
      *  @objects List of output objects*/
-    void LoadObjectSection(std::vector<Object> &objects);
+    bool LoadObjectSection(std::vector<Object> &objects);
 
     // -------------------------------------------------------------------
     /** Convert all objects into meshes and nodes.
@@ -242,7 +242,7 @@ private:
 
 private:
     // points to the next data line
-    const char *buffer;
+    aiBuffer mBuffer;
 
     // Configuration option: if enabled, up to two meshes
     // are generated per material: those faces who have

code/AssetLib/AMF/AMFImporter.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -53,7 +53,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 namespace Assimp {
 
-const aiImporterDesc AMFImporter::Description = {
+static constexpr aiImporterDesc Description = {
     "Additive manufacturing file format(AMF) Importer",
     "smalcom",
     "",
@@ -83,11 +83,7 @@ void AMFImporter::Clear() {
 
 AMFImporter::AMFImporter() AI_NO_EXCEPT :
         mNodeElement_Cur(nullptr),
-        mXmlParser(nullptr),
-        mUnit(),
-        mVersion(),
-        mMaterial_Converted(),
-        mTexture_Converted() {
+        mXmlParser(nullptr) {
     // empty
 }
 
@@ -182,28 +178,6 @@ bool AMFImporter::XML_SearchNode(const std::string &nodeName) {
     return nullptr != mXmlParser->findNode(nodeName);
 }
 
-void AMFImporter::ParseHelper_FixTruncatedFloatString(const char *pInStr, std::string &pOutString) {
-    size_t instr_len;
-
-    pOutString.clear();
-    instr_len = strlen(pInStr);
-    if (!instr_len) return;
-
-    pOutString.reserve(instr_len * 3 / 2);
-    // check and correct floats in format ".x". Must be "x.y".
-    if (pInStr[0] == '.') pOutString.push_back('0');
-
-    pOutString.push_back(pInStr[0]);
-    for (size_t ci = 1; ci < instr_len; ci++) {
-        if ((pInStr[ci] == '.') && ((pInStr[ci - 1] == ' ') || (pInStr[ci - 1] == '-') || (pInStr[ci - 1] == '+') || (pInStr[ci - 1] == '\t'))) {
-            pOutString.push_back('0');
-            pOutString.push_back('.');
-        } else {
-            pOutString.push_back(pInStr[ci]);
-        }
-    }
-}
-
 static bool ParseHelper_Decode_Base64_IsBase64(const char pChar) {
     return (isalnum((unsigned char)pChar) || (pChar == '+') || (pChar == '/'));
 }
@@ -217,7 +191,10 @@ void AMFImporter::ParseHelper_Decode_Base64(const std::string &pInputBase64, std
     uint8_t arr4[4], arr3[3];
 
     // check input data
-    if (pInputBase64.size() % 4) throw DeadlyImportError("Base64-encoded data must have size multiply of four.");
+    if (pInputBase64.size() % 4) {
+        throw DeadlyImportError("Base64-encoded data must have size multiply of four.");
+    }
+
     // prepare output place
     pOutputData.clear();
     pOutputData.reserve(pInputBase64.size() / 4 * 3);
@@ -261,7 +238,7 @@ void AMFImporter::ParseFile(const std::string &pFile, IOSystem *pIOHandler) {
     std::unique_ptr<IOStream> file(pIOHandler->Open(pFile, "rb"));
 
     // Check whether we can read from the file
-    if (file.get() == nullptr) {
+    if (file == nullptr) {
         throw DeadlyImportError("Failed to open AMF file ", pFile, ".");
     }
 
@@ -407,17 +384,17 @@ void AMFImporter::ParseNode_Instance(XmlNode &node) {
         for (auto &currentNode : node.children()) {
             const std::string &currentName = currentNode.name();
             if (currentName == "deltax") {
-                XmlParser::getValueAsFloat(currentNode, als.Delta.x);
+                XmlParser::getValueAsReal(currentNode, als.Delta.x);
             } else if (currentName == "deltay") {
-                XmlParser::getValueAsFloat(currentNode, als.Delta.y);
+                XmlParser::getValueAsReal(currentNode, als.Delta.y);
             } else if (currentName == "deltaz") {
-                XmlParser::getValueAsFloat(currentNode, als.Delta.z);
+                XmlParser::getValueAsReal(currentNode, als.Delta.z);
             } else if (currentName == "rx") {
-                XmlParser::getValueAsFloat(currentNode, als.Delta.x);
+                XmlParser::getValueAsReal(currentNode, als.Delta.x);
             } else if (currentName == "ry") {
-                XmlParser::getValueAsFloat(currentNode, als.Delta.y);
+                XmlParser::getValueAsReal(currentNode, als.Delta.y);
             } else if (currentName == "rz") {
-                XmlParser::getValueAsFloat(currentNode, als.Delta.z);
+                XmlParser::getValueAsReal(currentNode, als.Delta.z);
             }
         }
         ParseHelper_Node_Exit();
@@ -503,19 +480,9 @@ void AMFImporter::ParseNode_Metadata(XmlNode &node) {
     mNodeElement_List.push_back(ne); // and to node element list because its a new object in graph.
 }
 
-bool AMFImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool pCheckSig) const {
-    const std::string extension = GetExtension(pFile);
-
-    if (extension == "amf") {
-        return true;
-    }
-
-    if (extension.empty() || pCheckSig) {
-        static const char * const tokens[] = { "<amf" };
-        return SearchFileHeaderForToken(pIOHandler, pFile, tokens, 1);
-    }
-
-    return false;
+bool AMFImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*pCheckSig*/) const {
+    static const char *tokens[] = { "<amf" };
+    return SearchFileHeaderForToken(pIOHandler, pFile, tokens, AI_COUNT_OF(tokens));
 }
 
 const aiImporterDesc *AMFImporter::GetInfo() const {

code/AssetLib/AMF/AMFImporter.hpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -98,8 +98,12 @@ namespace Assimp {
 ///            old - <map> and children <u1>, <u2>, <u3>, <v1>, <v2>, <v3>
 ///
 class AMFImporter : public BaseImporter {
-private:
-    struct SPP_Material; // forward declaration
+    using AMFMetaDataArray = std::vector<AMFMetadata *>;
+    using MeshArray = std::vector<aiMesh *>;
+    using NodeArray = std::vector<aiNode *>;
+
+public:
+    struct SPP_Material;
 
     /// Data type for post-processing step. More suitable container for part of material's composition.
     struct SPP_Composite {
@@ -107,22 +111,6 @@ private:
         std::string Formula; ///< Formula for calculating ratio of \ref Material.
     };
 
-    /// \struct SPP_Material
-    /// Data type for post-processing step. More suitable container for material.
-    struct SPP_Material {
-        std::string ID; ///< Material ID.
-        std::list<AMFMetadata *> Metadata; ///< Metadata of material.
-        AMFColor *Color; ///< Color of material.
-        std::list<SPP_Composite> Composition; ///< List of child materials if current material is composition of few another.
-
-        /// Return color calculated for specified coordinate.
-        /// \param [in] pX - "x" coordinate.
-        /// \param [in] pY - "y" coordinate.
-        /// \param [in] pZ - "z" coordinate.
-        /// \return calculated color.
-        aiColor4D GetColor(const float pX, const float pY, const float pZ) const;
-    };
-
     /// Data type for post-processing step. More suitable container for texture.
     struct SPP_Texture {
         std::string ID;
@@ -139,10 +127,51 @@ private:
         const AMFTexMap *TexMap; ///< Face texture mapping data. Equal to nullptr if texture mapping is not set for the face.
     };
 
-    using AMFMetaDataArray = std::vector<AMFMetadata*>;
-    using MeshArray = std::vector<aiMesh*>;
-    using NodeArray = std::vector<aiNode*>;
+    /// Data type for post-processing step. More suitable container for material.
+    struct SPP_Material {
+        std::string ID; ///< Material ID.
+        std::list<AMFMetadata *> Metadata; ///< Metadata of material.
+        AMFColor *Color; ///< Color of material.
+        std::list<SPP_Composite> Composition; ///< List of child materials if current material is composition of few another.
 
+        /// Return color calculated for specified coordinate.
+        /// \param [in] pX - "x" coordinate.
+        /// \param [in] pY - "y" coordinate.
+        /// \param [in] pZ - "z" coordinate.
+        /// \return calculated color.
+        aiColor4D GetColor(const float pX, const float pY, const float pZ) const;
+    };
+
+    /// Default constructor.
+    AMFImporter() AI_NO_EXCEPT;
+
+    /// Default destructor.
+    ~AMFImporter() override;
+
+    /// Parse AMF file and fill scene graph. The function has no return value. Result can be found by analyzing the generated graph.
+    /// Also exception can be thrown if trouble will found.
+    /// \param [in] pFile - name of file to be parsed.
+    /// \param [in] pIOHandler - pointer to IO helper object.
+    void ParseFile(const std::string &pFile, IOSystem *pIOHandler);
+    void ParseHelper_Node_Enter(AMFNodeElementBase *child);
+    void ParseHelper_Node_Exit();
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool pCheckSig) const override;
+    void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) override;
+    const aiImporterDesc *GetInfo() const override;
+    bool Find_NodeElement(const std::string &pID, const AMFNodeElementBase::EType pType, AMFNodeElementBase **pNodeElement) const;
+    bool Find_ConvertedNode(const std::string &pID, NodeArray &nodeArray, aiNode **pNode) const;
+    bool Find_ConvertedMaterial(const std::string &pID, const SPP_Material **pConvertedMaterial) const;
+    AI_WONT_RETURN void Throw_CloseNotFound(const std::string &nodeName) AI_WONT_RETURN_SUFFIX;
+    AI_WONT_RETURN void Throw_IncorrectAttr(const std::string &nodeName, const std::string &pAttrName) AI_WONT_RETURN_SUFFIX;
+    AI_WONT_RETURN void Throw_IncorrectAttrValue(const std::string &nodeName, const std::string &pAttrName) AI_WONT_RETURN_SUFFIX;
+    AI_WONT_RETURN void Throw_MoreThanOnceDefined(const std::string &nodeName, const std::string &pNodeType, const std::string &pDescription) AI_WONT_RETURN_SUFFIX;
+    AI_WONT_RETURN void Throw_ID_NotFound(const std::string &pID) const AI_WONT_RETURN_SUFFIX;
+    void XML_CheckNode_MustHaveChildren(pugi::xml_node &node);
+    bool XML_SearchNode(const std::string &nodeName);
+    AMFImporter(const AMFImporter &pScene) = delete;
+    AMFImporter &operator=(const AMFImporter &pScene) = delete;
+
+private:
     /// Clear all temporary data.
     void Clear();
 
@@ -262,40 +291,9 @@ private:
     /// \param [in] pUseOldName - if true then use old name of node(and children) - <map>, instead of new name - <texmap>.
     void ParseNode_TexMap(XmlNode &node, const bool pUseOldName = false);
 
-public:
-    /// Default constructor.
-    AMFImporter() AI_NO_EXCEPT;
 
-    /// Default destructor.
-    ~AMFImporter() override;
-
-    /// Parse AMF file and fill scene graph. The function has no return value. Result can be found by analyzing the generated graph.
-    /// Also exception can be thrown if trouble will found.
-    /// \param [in] pFile - name of file to be parsed.
-    /// \param [in] pIOHandler - pointer to IO helper object.
-    void ParseFile(const std::string &pFile, IOSystem *pIOHandler);
-    void ParseHelper_Node_Enter(AMFNodeElementBase *child);
-    void ParseHelper_Node_Exit();
-    bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool pCheckSig) const override;
-    void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) override;
-    const aiImporterDesc *GetInfo() const override;
-    bool Find_NodeElement(const std::string &pID, const AMFNodeElementBase::EType pType, AMFNodeElementBase **pNodeElement) const;
-    bool Find_ConvertedNode(const std::string &pID, NodeArray &nodeArray, aiNode **pNode) const;
-    bool Find_ConvertedMaterial(const std::string &pID, const SPP_Material **pConvertedMaterial) const;
-    void Throw_CloseNotFound(const std::string &nodeName);
-    void Throw_IncorrectAttr(const std::string &nodeName, const std::string &pAttrName);
-    void Throw_IncorrectAttrValue(const std::string &nodeName, const std::string &pAttrName);
-    void Throw_MoreThanOnceDefined(const std::string &nodeName, const std::string &pNodeType, const std::string &pDescription);
-    void Throw_ID_NotFound(const std::string &pID) const;
-    void XML_CheckNode_MustHaveChildren(pugi::xml_node &node);
-    bool XML_SearchNode(const std::string &nodeName);
-    void ParseHelper_FixTruncatedFloatString(const char *pInStr, std::string &pOutString);
-    AMFImporter(const AMFImporter &pScene) = delete;
-    AMFImporter &operator=(const AMFImporter &pScene) = delete;
 
 private:
-    static const aiImporterDesc Description;
-
     AMFNodeElementBase *mNodeElement_Cur; ///< Current element.
     std::list<AMFNodeElementBase *> mNodeElement_List; ///< All elements of scene graph.
     XmlParser *mXmlParser;

code/AssetLib/AMF/AMFImporter_Geometry.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -167,11 +167,11 @@ void AMFImporter::ParseNode_Coordinates(XmlNode &node) {
             AMFCoordinates &als = *((AMFCoordinates *)ne); // alias for convenience
             const std::string &currentName = ai_tolower(currentNode.name());
             if (currentName == "x") {
-                XmlParser::getValueAsFloat(currentNode, als.Coordinate.x);
+                XmlParser::getValueAsReal(currentNode, als.Coordinate.x);
             } else if (currentName == "y") {
-                XmlParser::getValueAsFloat(currentNode, als.Coordinate.y);
+                XmlParser::getValueAsReal(currentNode, als.Coordinate.y);
             } else if (currentName == "z") {
-                XmlParser::getValueAsFloat(currentNode, als.Coordinate.z);
+                XmlParser::getValueAsReal(currentNode, als.Coordinate.z);
             }
         }
         ParseHelper_Node_Exit();

code/AssetLib/AMF/AMFImporter_Material.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -263,26 +263,25 @@ void AMFImporter::ParseNode_TexMap(XmlNode &node, const bool pUseOldName) {
             const std::string &name = currentNode.name();
             if (name == "utex1") {
 				read_flag[0] = true;
-                XmlParser::getValueAsFloat(node, als.TextureCoordinate[0].x);
+                XmlParser::getValueAsReal(node, als.TextureCoordinate[0].x);
             } else if (name == "utex2") {
 				read_flag[1] = true;
-                XmlParser::getValueAsFloat(node, als.TextureCoordinate[1].x);
+                XmlParser::getValueAsReal(node, als.TextureCoordinate[1].x);
             } else if (name == "utex3") {
 				read_flag[2] = true;
-                XmlParser::getValueAsFloat(node, als.TextureCoordinate[2].x);
+                XmlParser::getValueAsReal(node, als.TextureCoordinate[2].x);
             } else if (name == "vtex1") {
 				read_flag[3] = true;
-                XmlParser::getValueAsFloat(node, als.TextureCoordinate[0].y);
+                XmlParser::getValueAsReal(node, als.TextureCoordinate[0].y);
             } else if (name == "vtex2") {
 				read_flag[4] = true;
-                XmlParser::getValueAsFloat(node, als.TextureCoordinate[1].y);
+                XmlParser::getValueAsReal(node, als.TextureCoordinate[1].y);
             } else if (name == "vtex3") {
 				read_flag[5] = true;
-                XmlParser::getValueAsFloat(node, als.TextureCoordinate[2].y);
+                XmlParser::getValueAsReal(node, als.TextureCoordinate[2].y);
 			}
 		}
         ParseHelper_Node_Exit();
-
 	} else {
 		for (pugi::xml_attribute &attr : node.attributes()) {
             const std::string name = attr.name();

code/AssetLib/AMF/AMFImporter_Node.hpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -56,7 +56,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <string>
 #include <vector>
 
-/// \class CAMFImporter_NodeElement
 /// Base class for elements of nodes.
 class AMFNodeElementBase {
 public:
@@ -88,9 +87,7 @@ public:
 	std::list<AMFNodeElementBase *> Child; ///< Child elements.
 
 public: /// Destructor, virtual..
-	virtual ~AMFNodeElementBase() {
-		// empty
-	}
+	virtual ~AMFNodeElementBase() = default;
 
 	/// Disabled copy constructor and co.
 	AMFNodeElementBase(const AMFNodeElementBase &pNodeElement) = delete;
@@ -103,12 +100,11 @@ protected:
 	/// \param [in] pType - element type.
 	/// \param [in] pParent - parent element.
 	AMFNodeElementBase(const EType pType, AMFNodeElementBase *pParent) :
-			Type(pType), ID(), Parent(pParent), Child() {
+			Type(pType), Parent(pParent) {
 		// empty
 	}
 }; // class IAMFImporter_NodeElement
 
-/// \struct CAMFImporter_NodeElement_Constellation
 /// A collection of objects or constellations with specific relative locations.
 struct AMFConstellation : public AMFNodeElementBase {
 	/// Constructor.
@@ -118,7 +114,6 @@ struct AMFConstellation : public AMFNodeElementBase {
 
 }; // struct CAMFImporter_NodeElement_Constellation
 
-/// \struct CAMFImporter_NodeElement_Instance
 /// Part of constellation.
 struct AMFInstance : public AMFNodeElementBase {
 
@@ -137,7 +132,6 @@ struct AMFInstance : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Instance, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Metadata
 /// Structure that define metadata node.
 struct AMFMetadata : public AMFNodeElementBase {
 
@@ -150,7 +144,6 @@ struct AMFMetadata : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Metadata, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Root
 /// Structure that define root node.
 struct AMFRoot : public AMFNodeElementBase {
 
@@ -163,7 +156,6 @@ struct AMFRoot : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Root, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Color
 /// Structure that define object node.
 struct AMFColor : public AMFNodeElementBase {
 	bool Composed; ///< Type of color stored: if true then look for formula in \ref Color_Composed[4], else - in \ref Color.
@@ -174,12 +166,11 @@ struct AMFColor : public AMFNodeElementBase {
 	/// @brief  Constructor.
 	/// @param [in] pParent - pointer to parent node.
 	AMFColor(AMFNodeElementBase *pParent) :
-			AMFNodeElementBase(ENET_Color, pParent), Composed(false), Color(), Profile() {
+			AMFNodeElementBase(ENET_Color, pParent), Composed(false), Color() {
 		// empty
 	}
 };
 
-/// \struct CAMFImporter_NodeElement_Material
 /// Structure that define material node.
 struct AMFMaterial : public AMFNodeElementBase {
 
@@ -189,7 +180,6 @@ struct AMFMaterial : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Material, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Object
 /// Structure that define object node.
 struct AMFObject : public AMFNodeElementBase {
 
@@ -208,7 +198,6 @@ struct AMFMesh : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Mesh, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Vertex
 /// Structure that define vertex node.
 struct AMFVertex : public AMFNodeElementBase {
 	/// Constructor.
@@ -217,7 +206,6 @@ struct AMFVertex : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Vertex, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Edge
 /// Structure that define edge node.
 struct AMFEdge : public AMFNodeElementBase {
 	/// Constructor.
@@ -226,7 +214,6 @@ struct AMFEdge : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Edge, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Vertices
 /// Structure that define vertices node.
 struct AMFVertices : public AMFNodeElementBase {
 	/// Constructor.
@@ -235,7 +222,6 @@ struct AMFVertices : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Vertices, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Volume
 /// Structure that define volume node.
 struct AMFVolume : public AMFNodeElementBase {
 	std::string MaterialID; ///< Which material to use.
@@ -247,7 +233,6 @@ struct AMFVolume : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Volume, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Coordinates
 /// Structure that define coordinates node.
 struct AMFCoordinates : public AMFNodeElementBase {
 	aiVector3D Coordinate; ///< Coordinate.
@@ -258,7 +243,6 @@ struct AMFCoordinates : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Coordinates, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_TexMap
 /// Structure that define texture coordinates node.
 struct AMFTexMap : public AMFNodeElementBase {
 	aiVector3D TextureCoordinate[3]; ///< Texture coordinates.
@@ -270,12 +254,11 @@ struct AMFTexMap : public AMFNodeElementBase {
 	/// Constructor.
 	/// \param [in] pParent - pointer to parent node.
 	AMFTexMap(AMFNodeElementBase *pParent) :
-			AMFNodeElementBase(ENET_TexMap, pParent), TextureCoordinate{}, TextureID_R(), TextureID_G(), TextureID_B(), TextureID_A() {
+			AMFNodeElementBase(ENET_TexMap, pParent), TextureCoordinate{} {
 		// empty
 	}
 };
 
-/// \struct CAMFImporter_NodeElement_Triangle
 /// Structure that define triangle node.
 struct AMFTriangle : public AMFNodeElementBase {
 	size_t V[3]; ///< Triangle vertices.

code/AssetLib/AMF/AMFImporter_Postprocess.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -224,7 +224,8 @@ size_t AMFImporter::PostprocessHelper_GetTextureID_Or_Create(const std::string &
     }
 
     // Create format hint.
-    strcpy(converted_texture.FormatHint, "rgba0000"); // copy initial string.
+    constexpr char templateColor[] = "rgba0000";
+    memcpy(converted_texture.FormatHint, templateColor, 8);
     if (!r.empty()) converted_texture.FormatHint[4] = '8';
     if (!g.empty()) converted_texture.FormatHint[5] = '8';
     if (!b.empty()) converted_texture.FormatHint[6] = '8';
@@ -815,6 +816,7 @@ nl_clean_loop:
             for (; next_it != nodeArray.end(); ++next_it) {
                 if ((*next_it)->FindNode((*nl_it)->mName) != nullptr) {
                     // if current top node(nl_it) found in another top node then erase it from node_list and restart search loop.
+                    // FIXME: this leaks memory on test models test8.amf and test9.amf
                     nodeArray.erase(nl_it);
 
                     goto nl_clean_loop;
@@ -866,7 +868,7 @@ nl_clean_loop:
             pScene->mTextures[idx]->mHeight = static_cast<unsigned int>(tex_convd.Height);
             pScene->mTextures[idx]->pcData = (aiTexel *)tex_convd.Data;
             // texture format description.
-            strcpy(pScene->mTextures[idx]->achFormatHint, tex_convd.FormatHint);
+            strncpy(pScene->mTextures[idx]->achFormatHint, tex_convd.FormatHint, HINTMAXTEXTURELEN);
             idx++;
         } // for(const SPP_Texture& tex_convd: mTexture_Converted)
 

code/AssetLib/ASE/ASELoader.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -44,7 +44,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ASSIMP_BUILD_NO_ASE_IMPORTER
-
 #ifndef ASSIMP_BUILD_NO_3DS_IMPORTER
 
 // internal headers
@@ -64,10 +63,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 // utilities
 #include <assimp/fast_atof.h>
 
-using namespace Assimp;
+namespace Assimp {
 using namespace Assimp::ASE;
 
-static const aiImporterDesc desc = {
+static constexpr aiImporterDesc desc = {
     "ASE Importer",
     "",
     "",
@@ -87,27 +86,11 @@ ASEImporter::ASEImporter() :
     // empty
 }
 
-// ------------------------------------------------------------------------------------------------
-// Destructor, private as well
-ASEImporter::~ASEImporter() {
-    // empty
-}
-
 // ------------------------------------------------------------------------------------------------
 // Returns whether the class can handle the format of the given file.
-bool ASEImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool cs) const {
-    // check file extension
-    const std::string extension = GetExtension(pFile);
-
-    if (extension == "ase" || extension == "ask") {
-        return true;
-    }
-
-    if ((!extension.length() || cs) && pIOHandler) {
-        static const char * const tokens[] = { "*3dsmax_asciiexport" };
-        return SearchFileHeaderForToken(pIOHandler, pFile, tokens, 1);
-    }
-    return false;
+bool ASEImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*checkSig*/) const {
+    static const char *tokens[] = { "*3dsmax_asciiexport" };
+    return SearchFileHeaderForToken(pIOHandler, pFile, tokens, AI_COUNT_OF(tokens));
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -134,14 +117,14 @@ void ASEImporter::InternReadFile(const std::string &pFile,
     std::unique_ptr<IOStream> file(pIOHandler->Open(pFile, "rb"));
 
     // Check whether we can read from the file
-    if (file.get() == nullptr) {
+    if (file == nullptr) {
         throw DeadlyImportError("Failed to open ASE file ", pFile, ".");
     }
 
     // Allocate storage and copy the contents of the file to a memory buffer
     std::vector<char> mBuffer2;
     TextFileToBuffer(file.get(), mBuffer2);
-
+    const size_t fileSize = mBuffer2.size();
     this->mBuffer = &mBuffer2[0];
     this->pcScene = pScene;
 
@@ -163,7 +146,7 @@ void ASEImporter::InternReadFile(const std::string &pFile,
     };
 
     // Construct an ASE parser and parse the file
-    ASE::Parser parser(mBuffer, defaultFormat);
+    ASE::Parser parser(mBuffer, fileSize, defaultFormat);
     mParser = &parser;
     mParser->Parse();
 
@@ -275,7 +258,7 @@ void ASEImporter::GenerateDefaultMaterial() {
     }
     if (bHas || mParser->m_vMaterials.empty()) {
         // add a simple material without submaterials to the parser's list
-        mParser->m_vMaterials.push_back(ASE::Material(AI_DEFAULT_MATERIAL_NAME));
+        mParser->m_vMaterials.emplace_back(AI_DEFAULT_MATERIAL_NAME);
         ASE::Material &mat = mParser->m_vMaterials.back();
 
         mat.mDiffuse = aiColor3D(0.6f, 0.6f, 0.6f);
@@ -338,21 +321,6 @@ void ASEImporter::BuildAnimations(const std::vector<BaseNode *> &nodes) {
                 aiNodeAnim *nd = pcAnim->mChannels[iNum++] = new aiNodeAnim();
                 nd->mNodeName.Set(me->mName + ".Target");
 
-                // If there is no input position channel we will need
-                // to supply the default position from the node's
-                // local transformation matrix.
-                /*TargetAnimationHelper helper;
-                if (me->mAnim.akeyPositions.empty())
-                {
-                    aiMatrix4x4& mat = (*i)->mTransform;
-                    helper.SetFixedMainAnimationChannel(aiVector3D(
-                        mat.a4, mat.b4, mat.c4));
-                }
-                else helper.SetMainAnimationChannel (&me->mAnim.akeyPositions);
-                helper.SetTargetAnimationChannel (&me->mTargetAnim.akeyPositions);
-
-                helper.Process(&me->mTargetAnim.akeyPositions);*/
-
                 // Allocate the key array and fill it
                 nd->mNumPositionKeys = (unsigned int)me->mTargetAnim.akeyPositions.size();
                 nd->mPositionKeys = new aiVectorKey[nd->mNumPositionKeys];
@@ -478,10 +446,9 @@ void ASEImporter::BuildLights() {
 }
 
 // ------------------------------------------------------------------------------------------------
-void ASEImporter::AddNodes(const std::vector<BaseNode *> &nodes,
-        aiNode *pcParent, const char *szName) {
+void ASEImporter::AddNodes(const std::vector<BaseNode *> &nodes, aiNode *pcParent, const std::string &name) {
     aiMatrix4x4 m;
-    AddNodes(nodes, pcParent, szName, m);
+    AddNodes(nodes, pcParent, name, m);
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -538,10 +505,9 @@ void ASEImporter::AddMeshes(const ASE::BaseNode *snode, aiNode *node) {
 
 // ------------------------------------------------------------------------------------------------
 // Add child nodes to a given parent node
-void ASEImporter::AddNodes(const std::vector<BaseNode *> &nodes,
-        aiNode *pcParent, const char *szName,
+void ASEImporter::AddNodes(const std::vector<BaseNode *> &nodes, aiNode *pcParent, const std::string &name,
         const aiMatrix4x4 &mat) {
-    const size_t len = szName ? ::strlen(szName) : 0;
+    const size_t len = name.size();
     ai_assert(4 <= AI_MAX_NUMBER_OF_COLOR_SETS);
 
     // Receives child nodes for the pcParent node
@@ -551,16 +517,18 @@ void ASEImporter::AddNodes(const std::vector<BaseNode *> &nodes,
     // which has *us* as parent.
     for (std::vector<BaseNode *>::const_iterator it = nodes.begin(), end = nodes.end(); it != end; ++it) {
         const BaseNode *snode = *it;
-        if (szName) {
-            if (len != snode->mParent.length() || ::strcmp(szName, snode->mParent.c_str()))
+        if (!name.empty()) {
+            if (len != snode->mParent.length() || name != snode->mParent.c_str()) {
                 continue;
-        } else if (snode->mParent.length())
+            }
+        } else if (snode->mParent.length()) {
             continue;
+        }
 
         (*it)->mProcessed = true;
 
         // Allocate a new node and add it to the output data structure
-        apcNodes.push_back(new aiNode());
+        apcNodes.push_back(new aiNode);
         aiNode *node = apcNodes.back();
 
         node->mName.Set((snode->mName.length() ? snode->mName.c_str() : "Unnamed_Node"));
@@ -573,7 +541,7 @@ void ASEImporter::AddNodes(const std::vector<BaseNode *> &nodes,
 
         // Add sub nodes - prevent stack overflow due to recursive parenting
         if (node->mName != node->mParent->mName && node->mName != node->mParent->mParent->mName) {
-            AddNodes(nodes, node, node->mName.data, snode->mTransform);
+            AddNodes(nodes, node, node->mName.C_Str(), snode->mTransform);
         }
 
         // Further processing depends on the type of the node
@@ -651,7 +619,8 @@ void ASEImporter::BuildNodes(std::vector<BaseNode *> &nodes) {
     }
 
     // add all nodes
-    AddNodes(nodes, ch, nullptr);
+    static const std::string none = "";
+    AddNodes(nodes, ch, none);
 
     // now iterate through al nodes and find those that have not yet
     // been added to the nodegraph (= their parent could not be recognized)
@@ -880,6 +849,7 @@ void ASEImporter::ConvertMaterial(ASE::Material &mat) {
         unsigned int iWire = 1;
         mat.pcInstance->AddProperty<int>((int *)&iWire, 1, AI_MATKEY_ENABLE_WIREFRAME);
     }
+    // fallthrough
     case D3DS::Discreet3DS::Gouraud:
         eShading = aiShadingMode_Gouraud;
         break;
@@ -935,7 +905,7 @@ void ASEImporter::ConvertMeshes(ASE::Mesh &mesh, std::vector<aiMesh *> &avOutMes
         ASSIMP_LOG_WARN("Material index is out of range");
     }
 
-    // If the material the mesh is assigned to is consisting of submeshes, split it
+    // If the material the mesh is assigned to consists of submeshes, split it
     if (!mParser->m_vMaterials[mesh.iMaterialIndex].avSubMaterials.empty()) {
         std::vector<ASE::Material> vSubMaterials = mParser->m_vMaterials[mesh.iMaterialIndex].avSubMaterials;
 
@@ -1014,8 +984,8 @@ void ASEImporter::ConvertMeshes(ASE::Mesh &mesh, std::vector<aiMesh *> &avOutMes
                                             blubb != mesh.mBoneVertices[iIndex2].mBoneWeights.end(); ++blubb) {
 
                                         // NOTE: illegal cases have already been filtered out
-                                        avOutputBones[(*blubb).first].push_back(std::pair<unsigned int, float>(
-                                                iBase, (*blubb).second));
+                                        avOutputBones[(*blubb).first].emplace_back(
+                                                iBase, (*blubb).second);
                                     }
                                 }
                             }
@@ -1293,6 +1263,8 @@ bool ASEImporter::GenerateNormals(ASE::Mesh &mesh) {
     return false;
 }
 
+}
+
 #endif // ASSIMP_BUILD_NO_3DS_IMPORTER
 
 #endif // !! ASSIMP_BUILD_NO_BASE_IMPORTER

code/AssetLib/ASE/ASELoader.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -62,7 +62,7 @@ namespace Assimp {
 class ASEImporter : public BaseImporter {
 public:
     ASEImporter();
-    ~ASEImporter() override;
+    ~ASEImporter() override = default;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
@@ -153,13 +153,13 @@ private:
      *  \param matrix Current transform
      */
     void AddNodes(const std::vector<ASE::BaseNode*>& nodes,
-        aiNode* pcParent,const char* szName);
+        aiNode* pcParent, const std::string &name);
 
     void AddNodes(const std::vector<ASE::BaseNode*>& nodes,
-        aiNode* pcParent,const char* szName,
+        aiNode* pcParent, const std::string &name,
         const aiMatrix4x4& matrix);
 
-    void AddMeshes(const ASE::BaseNode* snode,aiNode* node);
+    void AddMeshes(const ASE::BaseNode* snode, aiNode* node);
 
     // -------------------------------------------------------------------
     /** Generate a default material and add it to the parser's list
@@ -188,5 +188,4 @@ protected:
 
 } // end of namespace Assimp
 
-
 #endif // AI_3DSIMPORTER_H_INC

code/AssetLib/ASE/ASEParser.h

@@ -2,8 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
-
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -116,7 +115,7 @@ struct Material : public D3DS::Material {
         return *this;
     }
 
-    ~Material() {}
+    ~Material() = default;
 
     //! Contains all sub materials of this material
     std::vector<Material> avSubMaterials;
@@ -385,20 +384,18 @@ struct Dummy : public BaseNode {
 /** \brief Class to parse ASE files
  */
 class Parser {
-private:
-    Parser() AI_NO_EXCEPT {
-        // empty
-    }
-
 public:
+    /// @brief No default constructor.
+    Parser() = delete;
+
     // -------------------------------------------------------------------
     //! Construct a parser from a given input file which is
     //! guaranteed to be terminated with zero.
-    //! @param szFile Input file
+    //! @param file              The name of the input file.
     //! @param fileFormatDefault Assumed file format version. If the
     //!   file format is specified in the file the new value replaces
     //!   the default value.
-    Parser(const char *szFile, unsigned int fileFormatDefault);
+    Parser(const char *file, size_t fileLen, unsigned int fileFormatDefault);
 
     // -------------------------------------------------------------------
     //! Parses the file into the parsers internal representation
@@ -556,13 +553,15 @@ private:
     //! (also works for MESH_TVERT, MESH_CFACE, MESH_VERTCOL  ...)
     //! \param apOut Output buffer (3 floats)
     //! \param rIndexOut Output index
-    void ParseLV4MeshFloatTriple(ai_real *apOut, unsigned int &rIndexOut);
+    void ParseLV4MeshRealTriple(ai_real *apOut, unsigned int &rIndexOut);
+    void ParseLV4MeshFloatTriple(float *apOut, unsigned int &rIndexOut);
 
     // -------------------------------------------------------------------
     //! Parse a *MESH_VERT block in a file
     //! (also works for MESH_TVERT, MESH_CFACE, MESH_VERTCOL  ...)
     //! \param apOut Output buffer (3 floats)
-    void ParseLV4MeshFloatTriple(ai_real *apOut);
+    void ParseLV4MeshRealTriple(ai_real *apOut);
+    void ParseLV4MeshFloatTriple(float *apOut);
 
     // -------------------------------------------------------------------
     //! Parse a *MESH_TFACE block in a file
@@ -580,7 +579,8 @@ private:
     // -------------------------------------------------------------------
     //! Parse a single float element
     //! \param fOut Output float
-    void ParseLV4MeshFloat(ai_real &fOut);
+    void ParseLV4MeshReal(ai_real &fOut);
+    void ParseLV4MeshFloat(float &fOut);
 
     // -------------------------------------------------------------------
     //! Parse a single int element
@@ -620,8 +620,8 @@ private:
     bool ParseString(std::string &out, const char *szName);
 
 public:
-    //! Pointer to current data
-    const char *filePtr;
+    const char *mFilePtr; ////< Pointer to current data
+    const char *mEnd;     ///< The end pointer of the file data
 
     //! background color to be passed to the viewer
     //! QNAN if none was found

code/AssetLib/Assbin/AssbinExporter.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 

code/AssetLib/Assbin/AssbinExporter.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -56,5 +56,5 @@ namespace Assimp {
 void ASSIMP_API ExportSceneAssbin(const char* pFile, IOSystem* pIOSystem, const aiScene* pScene, const ExportProperties* /*pProperties*/);
 
 }
-#endif 
+#endif
 #endif // AI_ASSBINEXPORTER_H_INC

code/AssetLib/Assbin/AssbinFileWriter.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -50,11 +50,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/version.h>
 #include <assimp/IOStream.hpp>
 
-#ifdef ASSIMP_BUILD_NO_OWN_ZLIB
-#include <zlib.h>
-#else
-#include "../contrib/zlib/zlib.h"
-#endif
+#include "zlib.h"
 
 #include <ctime>
 
@@ -130,7 +126,7 @@ inline size_t Write<double>(IOStream *stream, const double &f) {
 // Serialize a vec3
 template <>
 inline size_t Write<aiVector3D>(IOStream *stream, const aiVector3D &v) {
-    size_t t = Write<float>(stream, v.x);
+    size_t t = Write<ai_real>(stream, v.x);
     t += Write<float>(stream, v.y);
     t += Write<float>(stream, v.z);
 
@@ -141,7 +137,7 @@ inline size_t Write<aiVector3D>(IOStream *stream, const aiVector3D &v) {
 // Serialize a color value
 template <>
 inline size_t Write<aiColor3D>(IOStream *stream, const aiColor3D &v) {
-    size_t t = Write<float>(stream, v.r);
+    size_t t = Write<ai_real>(stream, v.r);
     t += Write<float>(stream, v.g);
     t += Write<float>(stream, v.b);
 
@@ -152,7 +148,7 @@ inline size_t Write<aiColor3D>(IOStream *stream, const aiColor3D &v) {
 // Serialize a color value
 template <>
 inline size_t Write<aiColor4D>(IOStream *stream, const aiColor4D &v) {
-    size_t t = Write<float>(stream, v.r);
+    size_t t = Write<ai_real>(stream, v.r);
     t += Write<float>(stream, v.g);
     t += Write<float>(stream, v.b);
     t += Write<float>(stream, v.a);
@@ -164,7 +160,7 @@ inline size_t Write<aiColor4D>(IOStream *stream, const aiColor4D &v) {
 // Serialize a quaternion
 template <>
 inline size_t Write<aiQuaternion>(IOStream *stream, const aiQuaternion &v) {
-    size_t t = Write<float>(stream, v.w);
+    size_t t = Write<ai_real>(stream, v.w);
     t += Write<float>(stream, v.x);
     t += Write<float>(stream, v.y);
     t += Write<float>(stream, v.z);
@@ -182,17 +178,19 @@ inline size_t Write<aiVertexWeight>(IOStream *stream, const aiVertexWeight &v) {
     return t + Write<float>(stream, v.mWeight);
 }
 
+constexpr size_t MatrixSize = 64;
+
 // -----------------------------------------------------------------------------------
 // Serialize a mat4x4
 template <>
 inline size_t Write<aiMatrix4x4>(IOStream *stream, const aiMatrix4x4 &m) {
     for (unsigned int i = 0; i < 4; ++i) {
         for (unsigned int i2 = 0; i2 < 4; ++i2) {
-            Write<float>(stream, m[i][i2]);
+            Write<ai_real>(stream, m[i][i2]);
         }
     }
 
-    return 64;
+    return MatrixSize;
 }
 
 // -----------------------------------------------------------------------------------
@@ -289,15 +287,15 @@ public:
     size_t Read(void * /*pvBuffer*/, size_t /*pSize*/, size_t /*pCount*/) override {
         return 0;
     }
-    
+
     aiReturn Seek(size_t /*pOffset*/, aiOrigin /*pOrigin*/) override {
         return aiReturn_FAILURE;
     }
-    
+
     size_t Tell() const override {
         return cursor;
     }
-    
+
     void Flush() override {
         // not implemented
     }
@@ -640,6 +638,10 @@ protected:
         Write<aiString>(&chunk, l->mName);
         Write<unsigned int>(&chunk, l->mType);
 
+        Write<aiVector3D>(&chunk, l->mPosition);
+        Write<aiVector3D>(&chunk, l->mDirection);
+        Write<aiVector3D>(&chunk, l->mUp);
+
         if (l->mType != aiLightSource_DIRECTIONAL) {
             Write<float>(&chunk, l->mAttenuationConstant);
             Write<float>(&chunk, l->mAttenuationLinear);

code/AssetLib/Assbin/AssbinFileWriter.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 

code/AssetLib/Assbin/AssbinLoader.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -65,7 +65,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 using namespace Assimp;
 
-static const aiImporterDesc desc = {
+static constexpr aiImporterDesc desc = {
     "Assimp Binary Importer",
     "Gargaj / Conspiracy",
     "",
@@ -556,6 +556,10 @@ void AssbinImporter::ReadBinaryLight(IOStream *stream, aiLight *l) {
     l->mName = Read<aiString>(stream);
     l->mType = (aiLightSourceType)Read<unsigned int>(stream);
 
+    l->mPosition = Read<aiVector3D>(stream);
+    l->mDirection = Read<aiVector3D>(stream);
+    l->mUp = Read<aiVector3D>(stream);
+
     if (l->mType != aiLightSource_DIRECTIONAL) {
         l->mAttenuationConstant = Read<float>(stream);
         l->mAttenuationLinear = Read<float>(stream);

code/AssetLib/Assbin/AssbinLoader.h

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 

code/AssetLib/Assjson/cencode.c

@@ -7,7 +7,7 @@ For details, see http://sourceforge.net/projects/libb64
 
 #include "cencode.h" // changed from <B64/cencode.h>
 
-const int CHARS_PER_LINE = 72;
+static const int CHARS_PER_LINE = 72;
 
 #ifdef _MSC_VER
 #pragma warning(push)

code/AssetLib/Assjson/json_exporter.cpp

@@ -10,6 +10,7 @@ Licensed under a 3-clause BSD license. See the LICENSE file for more information
 #ifndef ASSIMP_BUILD_NO_ASSJSON_EXPORTER
 
 #include <assimp/scene.h>
+#include <assimp/ai_assert.h>
 #include <assimp/Exporter.hpp>
 #include <assimp/IOStream.hpp>
 #include <assimp/IOSystem.hpp>
@@ -23,16 +24,15 @@ Licensed under a 3-clause BSD license. See the LICENSE file for more information
 
 #define CURRENT_FORMAT_VERSION 100
 
-// grab scoped_ptr from assimp to avoid a dependency on boost.
-//#include <assimp/../../code/BoostWorkaround/boost/scoped_ptr.hpp>
-
 #include "mesh_splitter.h"
 
 extern "C" {
-#include "cencode.h"
+#   include "cencode.h"
 }
+
 namespace Assimp {
 
+// Forward declarations
 void ExportAssimp2Json(const char *, Assimp::IOSystem *, const aiScene *, const Assimp::ExportProperties *);
 
 // small utility class to simplify serializing the aiScene to Json
@@ -43,7 +43,7 @@ public:
         Flag_WriteSpecialFloats = 0x2,
         Flag_SkipWhitespaces = 0x4
     };
-    
+
     JSONWriter(Assimp::IOStream &out, unsigned int flags = 0u) :
             out(out), indent (""), newline("\n"), space(" "), buff (), first(false), flags(flags) {
         // make sure that all formatting happens using the standard, C locale and not the user's current locale
@@ -179,7 +179,6 @@ private:
         // escape backslashes and single quotes, both would render the JSON invalid if left as is
         t.reserve(s.length);
         for (size_t i = 0; i < s.length; ++i) {
-
             if (s.data[i] == '\\' || s.data[i] == '\'' || s.data[i] == '\"') {
                 t.push_back('\\');
             }
@@ -241,7 +240,7 @@ private:
     unsigned int flags;
 };
 
-void Write(JSONWriter &out, const aiVector3D &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiVector3D &ai, bool is_elem = true) {
     out.StartArray(is_elem);
     out.Element(ai.x);
     out.Element(ai.y);
@@ -249,7 +248,7 @@ void Write(JSONWriter &out, const aiVector3D &ai, bool is_elem = true) {
     out.EndArray();
 }
 
-void Write(JSONWriter &out, const aiQuaternion &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiQuaternion &ai, bool is_elem = true) {
     out.StartArray(is_elem);
     out.Element(ai.w);
     out.Element(ai.x);
@@ -258,7 +257,7 @@ void Write(JSONWriter &out, const aiQuaternion &ai, bool is_elem = true) {
     out.EndArray();
 }
 
-void Write(JSONWriter &out, const aiColor3D &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiColor3D &ai, bool is_elem = true) {
     out.StartArray(is_elem);
     out.Element(ai.r);
     out.Element(ai.g);
@@ -266,7 +265,7 @@ void Write(JSONWriter &out, const aiColor3D &ai, bool is_elem = true) {
     out.EndArray();
 }
 
-void Write(JSONWriter &out, const aiMatrix4x4 &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiMatrix4x4 &ai, bool is_elem = true) {
     out.StartArray(is_elem);
     for (unsigned int x = 0; x < 4; ++x) {
         for (unsigned int y = 0; y < 4; ++y) {
@@ -276,7 +275,7 @@ void Write(JSONWriter &out, const aiMatrix4x4 &ai, bool is_elem = true) {
     out.EndArray();
 }
 
-void Write(JSONWriter &out, const aiBone &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiBone &ai, bool is_elem = true) {
     out.StartObj(is_elem);
 
     out.Key("name");
@@ -297,7 +296,7 @@ void Write(JSONWriter &out, const aiBone &ai, bool is_elem = true) {
     out.EndObj();
 }
 
-void Write(JSONWriter &out, const aiFace &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiFace &ai, bool is_elem = true) {
     out.StartArray(is_elem);
     for (unsigned int i = 0; i < ai.mNumIndices; ++i) {
         out.Element(ai.mIndices[i]);
@@ -305,7 +304,7 @@ void Write(JSONWriter &out, const aiFace &ai, bool is_elem = true) {
     out.EndArray();
 }
 
-void Write(JSONWriter &out, const aiMesh &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiMesh &ai, bool is_elem = true) {
     out.StartObj(is_elem);
 
     out.Key("name");
@@ -416,7 +415,7 @@ void Write(JSONWriter &out, const aiMesh &ai, bool is_elem = true) {
     out.EndObj();
 }
 
-void Write(JSONWriter &out, const aiNode &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiNode &ai, bool is_elem = true) {
     out.StartObj(is_elem);
 
     out.Key("name");
@@ -446,7 +445,7 @@ void Write(JSONWriter &out, const aiNode &ai, bool is_elem = true) {
     out.EndObj();
 }
 
-void Write(JSONWriter &out, const aiMaterial &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiMaterial &ai, bool is_elem = true) {
     out.StartObj(is_elem);
 
     out.Key("properties");
@@ -466,41 +465,55 @@ void Write(JSONWriter &out, const aiMaterial &ai, bool is_elem = true) {
 
         out.Key("value");
         switch (prop->mType) {
-        case aiPTI_Float:
-            if (prop->mDataLength / sizeof(float) > 1) {
-                out.StartArray();
-                for (unsigned int ii = 0; ii < prop->mDataLength / sizeof(float); ++ii) {
-                    out.Element(reinterpret_cast<float *>(prop->mData)[ii]);
+            case aiPTI_Float:
+                if (prop->mDataLength / sizeof(float) > 1) {
+                    out.StartArray();
+                    for (unsigned int ii = 0; ii < prop->mDataLength / sizeof(float); ++ii) {
+                        out.Element(reinterpret_cast<float *>(prop->mData)[ii]);
+                    }
+                    out.EndArray();
+                } else {
+                    out.SimpleValue(*reinterpret_cast<float *>(prop->mData));
                 }
-                out.EndArray();
-            } else {
-                out.SimpleValue(*reinterpret_cast<float *>(prop->mData));
-            }
-            break;
-
-        case aiPTI_Integer:
-            if (prop->mDataLength / sizeof(int) > 1) {
-                out.StartArray();
-                for (unsigned int ii = 0; ii < prop->mDataLength / sizeof(int); ++ii) {
-                    out.Element(reinterpret_cast<int *>(prop->mData)[ii]);
+                break;
+            case aiPTI_Double:
+                if (prop->mDataLength / sizeof(double) > 1) {
+                    out.StartArray();
+                    for (unsigned int ii = 0; ii < prop->mDataLength / sizeof(double); ++ii) {
+                        out.Element(reinterpret_cast<double*>(prop->mData)[ii]);
+                    }
+                    out.EndArray();
+                } else {
+                    out.SimpleValue(*reinterpret_cast<double*>(prop->mData));
                 }
-                out.EndArray();
-            } else {
-                out.SimpleValue(*reinterpret_cast<int *>(prop->mData));
-            }
-            break;
+                break;
+            case aiPTI_Integer:
+                if (prop->mDataLength / sizeof(int) > 1) {
+                    out.StartArray();
+                    for (unsigned int ii = 0; ii < prop->mDataLength / sizeof(int); ++ii) {
+                        out.Element(reinterpret_cast<int *>(prop->mData)[ii]);
+                    }
+                    out.EndArray();
+                } else {
+                    out.SimpleValue(*reinterpret_cast<int *>(prop->mData));
+                }
+                break;
 
-        case aiPTI_String: {
-            aiString s;
-            aiGetMaterialString(&ai, prop->mKey.data, prop->mSemantic, prop->mIndex, &s);
-            out.SimpleValue(s);
-        } break;
-        case aiPTI_Buffer: {
-            // binary data is written as series of hex-encoded octets
-            out.SimpleValue(prop->mData, prop->mDataLength);
-        } break;
-        default:
-            assert(false);
+            case aiPTI_String:
+                {
+                    aiString s;
+                    aiGetMaterialString(&ai, prop->mKey.data, prop->mSemantic, prop->mIndex, &s);
+                    out.SimpleValue(s);
+                }
+                break;
+            case aiPTI_Buffer:
+                {
+                    // binary data is written as series of hex-encoded octets
+                    out.SimpleValue(prop->mData, prop->mDataLength);
+                }
+                break;
+            default:
+                ai_assert(false);
         }
 
         out.EndObj();
@@ -510,7 +523,7 @@ void Write(JSONWriter &out, const aiMaterial &ai, bool is_elem = true) {
     out.EndObj();
 }
 
-void Write(JSONWriter &out, const aiTexture &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiTexture &ai, bool is_elem = true) {
     out.StartObj(is_elem);
 
     out.Key("width");
@@ -546,7 +559,7 @@ void Write(JSONWriter &out, const aiTexture &ai, bool is_elem = true) {
     out.EndObj();
 }
 
-void Write(JSONWriter &out, const aiLight &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiLight &ai, bool is_elem = true) {
     out.StartObj(is_elem);
 
     out.Key("name");
@@ -594,7 +607,7 @@ void Write(JSONWriter &out, const aiLight &ai, bool is_elem = true) {
     out.EndObj();
 }
 
-void Write(JSONWriter &out, const aiNodeAnim &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiNodeAnim &ai, bool is_elem = true) {
     out.StartObj(is_elem);
 
     out.Key("name");
@@ -647,7 +660,7 @@ void Write(JSONWriter &out, const aiNodeAnim &ai, bool is_elem = true) {
     out.EndObj();
 }
 
-void Write(JSONWriter &out, const aiAnimation &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiAnimation &ai, bool is_elem = true) {
     out.StartObj(is_elem);
 
     out.Key("name");
@@ -668,7 +681,7 @@ void Write(JSONWriter &out, const aiAnimation &ai, bool is_elem = true) {
     out.EndObj();
 }
 
-void Write(JSONWriter &out, const aiCamera &ai, bool is_elem = true) {
+static void Write(JSONWriter &out, const aiCamera &ai, bool is_elem = true) {
     out.StartObj(is_elem);
 
     out.Key("name");
@@ -695,7 +708,7 @@ void Write(JSONWriter &out, const aiCamera &ai, bool is_elem = true) {
     out.EndObj();
 }
 
-void WriteFormatInfo(JSONWriter &out) {
+static void WriteFormatInfo(JSONWriter &out) {
     out.StartObj();
     out.Key("format");
     out.SimpleValue("\"assimp2json\"");
@@ -704,7 +717,7 @@ void WriteFormatInfo(JSONWriter &out) {
     out.EndObj();
 }
 
-void Write(JSONWriter &out, const aiScene &ai) {
+static void Write(JSONWriter &out, const aiScene &ai) {
     out.StartObj();
 
     out.Key("__metadata__");

code/AssetLib/Assjson/mesh_splitter.cpp

@@ -304,7 +304,7 @@ void MeshSplitter :: SplitMesh(unsigned int a, aiMesh* in_mesh, std::vector<std:
 		}
 
 		// add the newly created mesh to the list
-		source_mesh_map.push_back(std::make_pair(out_mesh,a));
+		source_mesh_map.emplace_back(out_mesh,a);
 
 		if (base == in_mesh->mNumFaces) {
 			break;

code/AssetLib/Assxml/AssxmlExporter.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.

code/AssetLib/Assxml/AssxmlExporter.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.

code/AssetLib/Assxml/AssxmlFileWriter.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -365,7 +365,7 @@ static void WriteDump(const char *pFile, const char *cmd, const aiScene *scene,
 
                 ioprintf(io, "\t\t\t<MatProperty key=\"%s\" \n\t\t\ttype=\"%s\" tex_usage=\"%s\" tex_index=\"%u\"",
                         prop->mKey.data, sz,
-                        ::TextureTypeToString((aiTextureType)prop->mSemantic), prop->mIndex);
+                        ::aiTextureTypeToString((aiTextureType)prop->mSemantic), prop->mIndex);
 
                 if (prop->mType == aiPTI_Float) {
                     ioprintf(io, " size=\"%i\">\n\t\t\t\t",
@@ -652,7 +652,7 @@ void DumpSceneToAssxml(
         const char *pFile, const char *cmd, IOSystem *pIOSystem,
         const aiScene *pScene, bool shortened) {
     std::unique_ptr<IOStream> file(pIOSystem->Open(pFile, "wt"));
-    if (!file.get()) {
+    if (!file) {
         throw std::runtime_error("Unable to open output file " + std::string(pFile) + '\n');
     }
 

code/AssetLib/Assxml/AssxmlFileWriter.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 

code/AssetLib/B3D/B3DImporter.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -59,10 +59,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <memory>
 
-using namespace Assimp;
+namespace Assimp {
 using namespace std;
 
-static const aiImporterDesc desc = {
+static constexpr aiImporterDesc desc = {
     "BlitzBasic 3D Importer",
     "",
     "",
@@ -79,7 +79,7 @@ static const aiImporterDesc desc = {
 #pragma warning(disable : 4018)
 #endif
 
-//#define DEBUG_B3D
+// #define DEBUG_B3D
 
 template <typename T>
 void DeleteAllBarePointers(std::vector<T> &x) {
@@ -88,12 +88,10 @@ void DeleteAllBarePointers(std::vector<T> &x) {
     }
 }
 
-B3DImporter::~B3DImporter() {
-}
+B3DImporter::~B3DImporter() = default;
 
 // ------------------------------------------------------------------------------------------------
 bool B3DImporter::CanRead(const std::string &pFile, IOSystem * /*pIOHandler*/, bool /*checkSig*/) const {
-
     size_t pos = pFile.find_last_of('.');
     if (pos == string::npos) {
         return false;
@@ -118,7 +116,7 @@ void B3DImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
     std::unique_ptr<IOStream> file(pIOHandler->Open(pFile));
 
     // Check whether we can read from the file
-    if (file.get() == nullptr) {
+    if (file == nullptr) {
         throw DeadlyImportError("Failed to open B3D file ", pFile, ".");
     }
 
@@ -152,7 +150,7 @@ AI_WONT_RETURN void B3DImporter::Fail(const string &str) {
 
 // ------------------------------------------------------------------------------------------------
 int B3DImporter::ReadByte() {
-    if (_pos > _buf.size()) {
+    if (_pos >= _buf.size()) {
         Fail("EOF");
     }
 
@@ -255,7 +253,7 @@ size_t B3DImporter::ChunkSize() {
 template <class T>
 T *B3DImporter::to_array(const vector<T> &v) {
     if (v.empty()) {
-        return 0;
+        return nullptr;
     }
     T *p = new T[v.size()];
     for (size_t i = 0; i < v.size(); ++i) {
@@ -268,7 +266,7 @@ T *B3DImporter::to_array(const vector<T> &v) {
 template <class T>
 T **unique_to_array(vector<std::unique_ptr<T>> &v) {
     if (v.empty()) {
-        return 0;
+        return nullptr;
     }
     T **p = new T *[v.size()];
     for (size_t i = 0; i < v.size(); ++i) {
@@ -331,7 +329,7 @@ void B3DImporter::ReadBRUS() {
             mat->AddProperty(&i, 1, AI_MATKEY_TWOSIDED);
         }
 
-        //Textures
+        // Textures
         for (int i = 0; i < n_texs; ++i) {
             int texid = ReadInt();
             if (texid < -1 || (texid >= 0 && texid >= static_cast<int>(_textures.size()))) {
@@ -374,7 +372,7 @@ void B3DImporter::ReadVRTS() {
         }
 
         if (_vflags & 2) {
-            ReadQuat(); //skip v 4bytes...
+            ReadQuat(); // skip v 4bytes...
         }
 
         for (int j = 0; j < _tcsets; ++j) {
@@ -420,7 +418,6 @@ void B3DImporter::ReadTRIS(int v0) {
             ASSIMP_LOG_ERROR("Bad triangle index: i0=", i0, ", i1=", i1, ", i2=", i2);
 #endif
             Fail("Bad triangle index");
-            continue;
         }
         face->mNumIndices = 3;
         face->mIndices = new unsigned[3];
@@ -479,13 +476,13 @@ void B3DImporter::ReadKEYS(aiNodeAnim *nodeAnim) {
     while (ChunkSize()) {
         int frame = ReadInt();
         if (flags & 1) {
-            trans.push_back(aiVectorKey(frame, ReadVec3()));
+            trans.emplace_back(frame, ReadVec3());
         }
         if (flags & 2) {
-            scale.push_back(aiVectorKey(frame, ReadVec3()));
+            scale.emplace_back(frame, ReadVec3());
         }
         if (flags & 4) {
-            rot.push_back(aiQuatKey(frame, ReadQuat()));
+            rot.emplace_back(frame, ReadQuat());
         }
     }
 
@@ -619,7 +616,7 @@ void B3DImporter::ReadBB3D(aiScene *scene) {
             } else if (chunk == "BRUS") {
                 ReadBRUS();
             } else if (chunk == "NODE") {
-                ReadNODE(0);
+                ReadNODE(nullptr);
             }
             ExitChunk();
         }
@@ -644,7 +641,7 @@ void B3DImporter::ReadBB3D(aiScene *scene) {
             int n_tris = mesh->mNumFaces;
             int n_verts = mesh->mNumVertices = n_tris * 3;
 
-            aiVector3D *mv = mesh->mVertices = new aiVector3D[n_verts], *mn = 0, *mc = 0;
+            aiVector3D *mv = mesh->mVertices = new aiVector3D[n_verts], *mn = nullptr, *mc = nullptr;
             if (_vflags & 1) {
                 mn = mesh->mNormals = new aiVector3D[n_verts];
             }
@@ -673,7 +670,7 @@ void B3DImporter::ReadBB3D(aiScene *scene) {
                         int bone = v.bones[k];
                         float weight = v.weights[k];
 
-                        vweights[bone].push_back(aiVertexWeight(vertIdx + faceIndex, weight));
+                        vweights[bone].emplace_back(vertIdx + faceIndex, weight);
                     }
                 }
                 ++face;
@@ -707,22 +704,22 @@ void B3DImporter::ReadBB3D(aiScene *scene) {
         }
     }
 
-    //nodes
+    // nodes
     scene->mRootNode = _nodes[0];
     _nodes.clear(); // node ownership now belongs to scene
 
-    //material
+    // material
     if (!_materials.size()) {
         _materials.emplace_back(std::unique_ptr<aiMaterial>(new aiMaterial));
     }
     scene->mNumMaterials = static_cast<unsigned int>(_materials.size());
     scene->mMaterials = unique_to_array(_materials);
 
-    //meshes
+    // meshes
     scene->mNumMeshes = static_cast<unsigned int>(_meshes.size());
     scene->mMeshes = unique_to_array(_meshes);
 
-    //animations
+    // animations
     if (_animations.size() == 1 && _nodeAnims.size()) {
 
         aiAnimation *anim = _animations.back().get();
@@ -741,4 +738,6 @@ void B3DImporter::ReadBB3D(aiScene *scene) {
     flip.Execute(scene);
 }
 
+} // namespace Assimp
+
 #endif // !! ASSIMP_BUILD_NO_B3D_IMPORTER

code/AssetLib/B3D/B3DImporter.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 

code/AssetLib/BVH/BVHLoader.cpp

@@ -4,7 +4,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 
@@ -55,10 +55,11 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <map>
 #include <memory>
 
-using namespace Assimp;
+namespace Assimp {
+
 using namespace Assimp::Formatter;
 
-static const aiImporterDesc desc = {
+static constexpr aiImporterDesc desc = {
     "BVH Importer (MoCap)",
     "",
     "",
@@ -73,8 +74,8 @@ static const aiImporterDesc desc = {
 
 // ------------------------------------------------------------------------------------------------
 // Aborts the file reading with an exception
-template<typename... T>
-AI_WONT_RETURN void BVHLoader::ThrowException(T&&... args) {
+template <typename... T>
+AI_WONT_RETURN void BVHLoader::ThrowException(T &&...args) {
     throw DeadlyImportError(mFileName, ":", mLine, " - ", args...);
 }
 
@@ -88,22 +89,13 @@ BVHLoader::BVHLoader() :
 
 // ------------------------------------------------------------------------------------------------
 // Destructor, private as well
-BVHLoader::~BVHLoader() {}
+BVHLoader::~BVHLoader() = default;
 
 // ------------------------------------------------------------------------------------------------
 // Returns whether the class can handle the format of the given file.
-bool BVHLoader::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool cs) const {
-    // check file extension
-    const std::string extension = GetExtension(pFile);
-
-    if (extension == "bvh")
-        return true;
-
-    if ((!extension.length() || cs) && pIOHandler) {
-        static const char * const tokens[] = { "HIERARCHY" };
-        return SearchFileHeaderForToken(pIOHandler, pFile, tokens, 1);
-    }
-    return false;
+bool BVHLoader::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*checkSig*/) const {
+    static const char *tokens[] = { "HIERARCHY" };
+    return SearchFileHeaderForToken(pIOHandler, pFile, tokens, AI_COUNT_OF(tokens));
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -124,7 +116,7 @@ void BVHLoader::InternReadFile(const std::string &pFile, aiScene *pScene, IOSyst
 
     // read file into memory
     std::unique_ptr<IOStream> file(pIOHandler->Open(pFile));
-    if (file.get() == nullptr) {
+    if (file == nullptr) {
         throw DeadlyImportError("Failed to open file ", pFile, ".");
     }
 
@@ -195,12 +187,12 @@ aiNode *BVHLoader::ReadNode() {
     std::vector<aiNode *> childNodes;
 
     // and create an bone entry for it
-    mNodes.push_back(Node(node));
+    mNodes.emplace_back(node);
     Node &internNode = mNodes.back();
 
     // now read the node's contents
     std::string siteToken;
-    while (1) {
+    while (true) {
         std::string token = GetNextToken();
 
         // node offset to parent node
@@ -256,7 +248,7 @@ aiNode *BVHLoader::ReadEndSite(const std::string &pParentName) {
 
     // now read the node's contents. Only possible entry is "OFFSET"
     std::string token;
-    while (1) {
+    while (true) {
         token.clear();
         token = GetNextToken();
 
@@ -435,7 +427,7 @@ void BVHLoader::CreateAnimation(aiScene *pScene) {
         nodeAnim->mNodeName.Set(nodeName);
         std::map<BVHLoader::ChannelType, int> channelMap;
 
-        //Build map of channels
+        // Build map of channels
         for (unsigned int channel = 0; channel < node.mChannels.size(); ++channel) {
             channelMap[node.mChannels[channel]] = channel;
         }
@@ -450,7 +442,7 @@ void BVHLoader::CreateAnimation(aiScene *pScene) {
 
                 // Now compute all translations
                 for (BVHLoader::ChannelType channel = Channel_PositionX; channel <= Channel_PositionZ; channel = (BVHLoader::ChannelType)(channel + 1)) {
-                    //Find channel in node
+                    // Find channel in node
                     std::map<BVHLoader::ChannelType, int>::iterator mapIter = channelMap.find(channel);
 
                     if (mapIter == channelMap.end())
@@ -494,30 +486,27 @@ void BVHLoader::CreateAnimation(aiScene *pScene) {
             for (unsigned int fr = 0; fr < mAnimNumFrames; ++fr) {
                 aiMatrix4x4 temp;
                 aiMatrix3x3 rotMatrix;
-				for (unsigned int channelIdx = 0; channelIdx < node.mChannels.size(); ++ channelIdx) {
-					switch (node.mChannels[channelIdx]) {
-                    case Channel_RotationX:
-                        {
+                for (unsigned int channelIdx = 0; channelIdx < node.mChannels.size(); ++channelIdx) {
+                    switch (node.mChannels[channelIdx]) {
+                    case Channel_RotationX: {
                         const float angle = node.mChannelValues[fr * node.mChannels.size() + channelIdx] * float(AI_MATH_PI) / 180.0f;
-                        aiMatrix4x4::RotationX( angle, temp); rotMatrix *= aiMatrix3x3( temp);
-                        }
-                        break;
-                    case Channel_RotationY:
-                        {
+                        aiMatrix4x4::RotationX(angle, temp);
+                        rotMatrix *= aiMatrix3x3(temp);
+                    } break;
+                    case Channel_RotationY: {
                         const float angle = node.mChannelValues[fr * node.mChannels.size() + channelIdx] * float(AI_MATH_PI) / 180.0f;
-                        aiMatrix4x4::RotationY( angle, temp); rotMatrix *= aiMatrix3x3( temp);
-                        }
-                        break;
-                    case Channel_RotationZ:
-                        {
+                        aiMatrix4x4::RotationY(angle, temp);
+                        rotMatrix *= aiMatrix3x3(temp);
+                    } break;
+                    case Channel_RotationZ: {
                         const float angle = node.mChannelValues[fr * node.mChannels.size() + channelIdx] * float(AI_MATH_PI) / 180.0f;
-                        aiMatrix4x4::RotationZ( angle, temp); rotMatrix *= aiMatrix3x3( temp);
-                        }
-                        break;
+                        aiMatrix4x4::RotationZ(angle, temp);
+                        rotMatrix *= aiMatrix3x3(temp);
+                    } break;
                     default:
                         break;
-					}
-				}
+                    }
+                }
                 rotkey->mTime = double(fr);
                 rotkey->mValue = aiQuaternion(rotMatrix);
                 ++rotkey;
@@ -534,4 +523,6 @@ void BVHLoader::CreateAnimation(aiScene *pScene) {
     }
 }
 
+} // namespace Assimp
+
 #endif // !! ASSIMP_BUILD_NO_BVH_IMPORTER

code/AssetLib/BVH/BVHLoader.h

@@ -4,7 +4,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.

code/AssetLib/Blender/BlenderBMesh.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 All rights reserved.
 
 Redistribution and use of this software in source and binary forms,
@@ -52,8 +52,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 namespace Assimp {
 template <>
 const char *LogFunctions<BlenderBMeshConverter>::Prefix() {
-    static auto prefix = "BLEND_BMESH: ";
-    return prefix;
+    return "BLEND_BMESH: ";
 }
 } // namespace Assimp
 
@@ -140,7 +139,7 @@ void BlenderBMeshConverter::ConvertPolyToFaces(const MPoly &poly) {
                 ThrowException("BMesh uv loop array has incorrect size");
             }
             const MLoopUV *loopUV = &BMesh->mloopuv[poly.loopstart];
-            AddTFace(loopUV[0].uv, loopUV[1].uv, loopUV[2].uv, poly.totloop == 4 ? loopUV[3].uv : 0);
+            AddTFace(loopUV[0].uv, loopUV[1].uv, loopUV[2].uv, poly.totloop == 4 ? loopUV[3].uv : nullptr);
         }
     } else if (poly.totloop > 4) {
 #if ASSIMP_BLEND_WITH_GLU_TESSELLATE

code/AssetLib/Blender/BlenderBMesh.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 All rights reserved.
 
 Redistribution and use of this software in source and binary forms,
@@ -80,7 +80,7 @@ namespace Assimp
         void DestroyTriMesh( );
         void ConvertPolyToFaces( const Blender::MPoly& poly );
         void AddFace( int v1, int v2, int v3, int v4 = 0 );
-        void AddTFace( const float* uv1, const float* uv2, const float *uv3, const float* uv4 = 0 );
+        void AddTFace(const float *uv1, const float *uv2, const float *uv3, const float *uv4 = nullptr);
 
         const Blender::Mesh* BMesh;
         Blender::Mesh* triMesh;

code/AssetLib/Blender/BlenderCustomData.cpp

@@ -96,7 +96,8 @@ struct CustomDataTypeDescription {
         *           other (like CD_ORCO, ...) uses arrays of rawtypes or even arrays of Structures
         *           use a special readfunction for that cases
         */
-std::array<CustomDataTypeDescription, CD_NUMTYPES> customDataTypeDescriptions = { { DECL_STRUCT_CUSTOMDATATYPEDESCRIPTION(MVert),
+static std::array<CustomDataTypeDescription, CD_NUMTYPES> customDataTypeDescriptions = { {
+        DECL_STRUCT_CUSTOMDATATYPEDESCRIPTION(MVert),
         DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
         DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
         DECL_STRUCT_CUSTOMDATATYPEDESCRIPTION(MEdge),

code/AssetLib/Blender/BlenderDNA.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -72,7 +72,7 @@ struct Type {
 
 // ------------------------------------------------------------------------------------------------
 void DNAParser::Parse() {
-    StreamReaderAny &stream = *db.reader.get();
+    StreamReaderAny &stream = *db.reader;
     DNA &dna = db.dna;
 
     if (!match4(stream, "SDNA")) {
@@ -325,10 +325,10 @@ void SectionParser ::Next() {
     stream.SetCurrentPos(current.start + current.size);
 
     const char tmp[] = {
-        (const char)stream.GetI1(),
-        (const char)stream.GetI1(),
-        (const char)stream.GetI1(),
-        (const char)stream.GetI1()
+        (char)stream.GetI1(),
+        (char)stream.GetI1(),
+        (char)stream.GetI1(),
+        (char)stream.GetI1()
     };
     current.id = std::string(tmp, tmp[3] ? 4 : tmp[2] ? 3 : tmp[1] ? 2 : 1);
 

code/AssetLib/Blender/BlenderDNA.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -106,9 +106,7 @@ struct ElemBase {
         // empty
     }
 
-    virtual ~ElemBase() {
-        // empty
-    }
+    virtual ~ElemBase() = default;
 
     /** Type name of the element. The type
      * string points is the `c_str` of the `name` attribute of the
@@ -416,10 +414,10 @@ template <>
 struct Structure::_defaultInitializer<ErrorPolicy_Fail> {
 
     template <typename T>
-    void operator()(T & /*out*/, const char * = "") {
+    void operator()(T & /*out*/, const char *message = "") {
         // obviously, it is crucial that _DefaultInitializer is used
         // only from within a catch clause.
-        throw DeadlyImportError("Constructing BlenderDNA Structure encountered an error");
+        throw DeadlyImportError("Constructing BlenderDNA Structure encountered an error: ", message);
     }
 };
 
@@ -431,6 +429,17 @@ inline bool Structure ::ResolvePointer<std::shared_ptr, ElemBase>(std::shared_pt
         const Field &f,
         bool) const;
 
+template <> bool Structure :: ResolvePointer<std::shared_ptr,ElemBase>(
+    std::shared_ptr<ElemBase>& out, const Pointer & ptrval,
+    const FileDatabase& db, const Field&, bool) const;
+template <> inline void Structure :: Convert<int>    (int& dest,const FileDatabase& db) const;
+template<> inline void Structure :: Convert<short>  (short& dest,const FileDatabase& db) const;
+template <> inline void Structure :: Convert<char>   (char& dest,const FileDatabase& db) const;
+template <> inline void Structure::Convert<unsigned char>(unsigned char& dest, const FileDatabase& db) const;
+template <> inline void Structure :: Convert<float>  (float& dest,const FileDatabase& db) const;
+template <> inline void Structure :: Convert<double> (double& dest,const FileDatabase& db) const;
+template <> inline void Structure :: Convert<Pointer> (Pointer& dest,const FileDatabase& db) const;
+
 // -------------------------------------------------------------------------------
 /** Represents the full data structure information for a single BLEND file.
  *  This data is extracted from the DNA1 chunk in the file.

code/AssetLib/Blender/BlenderDNA.inl

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 

code/AssetLib/Blender/BlenderIntermediate.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -65,8 +65,7 @@ namespace Blender {
     struct TempArray    {
         typedef TCLASS< T*,std::allocator<T*> > mywrap;
 
-        TempArray() {
-        }
+        TempArray() = default;
 
         ~TempArray () {
             for(T* elem : arr) {

code/AssetLib/Blender/BlenderLoader.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -63,22 +63,19 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/StringComparison.h>
 
 #include <cctype>
+#include <memory>
+#include <utility>
 
 // zlib is needed for compressed blend files
 #ifndef ASSIMP_BUILD_NO_COMPRESSED_BLEND
-#  ifdef ASSIMP_BUILD_NO_OWN_ZLIB
-#    include <zlib.h>
-#  else
-#    include "../contrib/zlib/zlib.h"
-#  endif
+#include "Common/Compression.h"
 #endif
 
 namespace Assimp {
 
 template <>
 const char *LogFunctions<BlenderImporter>::Prefix() {
-    static auto prefix = "BLEND: ";
-    return prefix;
+    return "BLEND: ";
 }
 
 } // namespace Assimp
@@ -87,7 +84,7 @@ using namespace Assimp;
 using namespace Assimp::Blender;
 using namespace Assimp::Formatter;
 
-static const aiImporterDesc blenderDesc = {
+static constexpr aiImporterDesc blenderDesc = {
     "Blender 3D Importer (http://www.blender3d.org)",
     "",
     "",
@@ -113,23 +110,12 @@ BlenderImporter::~BlenderImporter() {
     delete modifier_cache;
 }
 
-static const char * const Tokens[] = { "BLENDER" };
-static const char * const TokensForSearch[] = { "blender" };
+static const char Token[] = "BLENDER";
 
 // ------------------------------------------------------------------------------------------------
 // Returns whether the class can handle the format of the given file.
-bool BlenderImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const {
-    const std::string &extension = GetExtension(pFile);
-    if (extension == "blend") {
-        return true;
-    }
-
-    if ((!extension.length() || checkSig) && pIOHandler) {
-        // note: this won't catch compressed files
-        return SearchFileHeaderForToken(pIOHandler, pFile, TokensForSearch, 1);
-    }
-
-    return false;
+bool BlenderImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*checkSig*/) const {
+    return ParseMagicToken(pFile, pIOHandler).error.empty();
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -148,98 +134,25 @@ void BlenderImporter::SetupProperties(const Importer * /*pImp*/) {
 // Imports the given file into the given scene structure.
 void BlenderImporter::InternReadFile(const std::string &pFile,
         aiScene *pScene, IOSystem *pIOHandler) {
-#ifndef ASSIMP_BUILD_NO_COMPRESSED_BLEND
-    std::vector<Bytef> uncompressed;
-#endif
-
     FileDatabase file;
-    std::shared_ptr<IOStream> stream(pIOHandler->Open(pFile, "rb"));
-    if (!stream) {
-        ThrowException("Could not open file for reading");
+    StreamOrError streamOrError = ParseMagicToken(pFile, pIOHandler);
+    if (!streamOrError.error.empty()) {
+        ThrowException(streamOrError.error);
     }
+    std::shared_ptr<IOStream> stream = std::move(streamOrError.stream);
 
-    char magic[8] = { 0 };
-    stream->Read(magic, 7, 1);
-    if (strcmp(magic, Tokens[0])) {
-        // Check for presence of the gzip header. If yes, assume it is a
-        // compressed blend file and try uncompressing it, else fail. This is to
-        // avoid uncompressing random files which our loader might end up with.
-#ifdef ASSIMP_BUILD_NO_COMPRESSED_BLEND
-        ThrowException("BLENDER magic bytes are missing, is this file compressed (Assimp was built without decompression support)?");
-#else
+    char version[4] = { 0 };
+    file.i64bit = (stream->Read(version, 1, 1), version[0] == '-');
+    file.little = (stream->Read(version, 1, 1), version[0] == 'v');
 
-        if (magic[0] != 0x1f || static_cast<uint8_t>(magic[1]) != 0x8b) {
-            ThrowException("BLENDER magic bytes are missing, couldn't find GZIP header either");
-        }
+    stream->Read(version, 3, 1);
+    version[3] = '\0';
 
-        LogDebug("Found no BLENDER magic word but a GZIP header, might be a compressed file");
-        if (magic[2] != 8) {
-            ThrowException("Unsupported GZIP compression method");
-        }
-
-        // http://www.gzip.org/zlib/rfc-gzip.html#header-trailer
-        stream->Seek(0L, aiOrigin_SET);
-        std::shared_ptr<StreamReaderLE> reader = std::shared_ptr<StreamReaderLE>(new StreamReaderLE(stream));
-
-        // build a zlib stream
-        z_stream zstream;
-        zstream.opaque = Z_NULL;
-        zstream.zalloc = Z_NULL;
-        zstream.zfree = Z_NULL;
-        zstream.data_type = Z_BINARY;
-
-        // http://hewgill.com/journal/entries/349-how-to-decompress-gzip-stream-with-zlib
-        inflateInit2(&zstream, 16 + MAX_WBITS);
-
-        zstream.next_in = reinterpret_cast<Bytef *>(reader->GetPtr());
-        zstream.avail_in = (uInt)reader->GetRemainingSize();
-
-        size_t total = 0l;
-
-        // TODO: be smarter about this, decompress directly into heap buffer
-        // and decompress the data .... do 1k chunks in the hope that we won't kill the stack
-#define MYBLOCK 1024
-        Bytef block[MYBLOCK];
-        int ret;
-        do {
-            zstream.avail_out = MYBLOCK;
-            zstream.next_out = block;
-            ret = inflate(&zstream, Z_NO_FLUSH);
-
-            if (ret != Z_STREAM_END && ret != Z_OK) {
-                ThrowException("Failure decompressing this file using gzip, seemingly it is NOT a compressed .BLEND file");
-            }
-            const size_t have = MYBLOCK - zstream.avail_out;
-            total += have;
-            uncompressed.resize(total);
-            memcpy(uncompressed.data() + total - have, block, have);
-        } while (ret != Z_STREAM_END);
-
-        // terminate zlib
-        inflateEnd(&zstream);
-
-        // replace the input stream with a memory stream
-        stream.reset(new MemoryIOStream(reinterpret_cast<uint8_t *>(uncompressed.data()), total));
-
-        // .. and retry
-        stream->Read(magic, 7, 1);
-        if (strcmp(magic, "BLENDER")) {
-            ThrowException("Found no BLENDER magic word in decompressed GZIP file");
-        }
-#endif
-    }
-
-    file.i64bit = (stream->Read(magic, 1, 1), magic[0] == '-');
-    file.little = (stream->Read(magic, 1, 1), magic[0] == 'v');
-
-    stream->Read(magic, 3, 1);
-    magic[3] = '\0';
-
-    LogInfo("Blender version is ", magic[0], ".", magic + 1,
+    LogInfo("Blender version is ", version[0], ".", version + 1,
             " (64bit: ", file.i64bit ? "true" : "false",
             ", little endian: ", file.little ? "true" : "false", ")");
 
-    ParseBlendFile(file, stream);
+    ParseBlendFile(file, std::move(stream));
 
     Scene scene;
     ExtractScene(scene, file);
@@ -256,7 +169,7 @@ void BlenderImporter::ParseBlendFile(FileDatabase &out, std::shared_ptr<IOStream
 
     out.entries.reserve(128);
     { // even small BLEND files tend to consist of many file blocks
-        SectionParser parser(*out.reader.get(), out.i64bit);
+        SectionParser parser(*out.reader, out.i64bit);
 
         // first parse the file in search for the DNA and insert all other sections into the database
         while ((parser.Next(), 1)) {
@@ -318,42 +231,81 @@ void BlenderImporter::ExtractScene(Scene &out, const FileDatabase &file) {
 #endif
 }
 
+// ------------------------------------------------------------------------------------------------
+void BlenderImporter::ParseSubCollection(const Blender::Scene &in, aiNode *root, const std::shared_ptr<Collection>& collection, ConversionData &conv_data) {
+
+    std::deque<Object *> root_objects;
+    // Count number of objects
+    for (std::shared_ptr<CollectionObject> cur = std::static_pointer_cast<CollectionObject>(collection->gobject.first); cur; cur = cur->next) {
+        if (cur->ob) {
+            root_objects.push_back(cur->ob);
+        }
+    }
+    std::deque<Collection *> root_children;
+    // Count number of child nodes
+    for (std::shared_ptr<CollectionChild> cur = std::static_pointer_cast<CollectionChild>(collection->children.first); cur; cur = cur->next) {
+        if (cur->collection) {
+            root_children.push_back(cur->collection.get());
+        }
+    }
+    root->mNumChildren = static_cast<unsigned int>(root_objects.size() + root_children.size());
+    root->mChildren = new aiNode *[root->mNumChildren]();
+
+    for (unsigned int i = 0; i < static_cast<unsigned int>(root_objects.size()); ++i) {
+        root->mChildren[i] = ConvertNode(in, root_objects[i], conv_data, aiMatrix4x4());
+        root->mChildren[i]->mParent = root;
+    }
+
+    // For each subcollection create a new node to represent it
+    unsigned int iterator = static_cast<unsigned int>(root_objects.size());
+    for (std::shared_ptr<CollectionChild> cur = std::static_pointer_cast<CollectionChild>(collection->children.first); cur; cur = cur->next) {
+        if (cur->collection) {
+            root->mChildren[iterator] = new aiNode(cur->collection->id.name + 2); // skip over the name prefix 'OB'
+            root->mChildren[iterator]->mParent = root;
+            ParseSubCollection(in, root->mChildren[iterator], cur->collection, conv_data);
+        }
+        iterator += 1;
+    }
+}
+
 // ------------------------------------------------------------------------------------------------
 void BlenderImporter::ConvertBlendFile(aiScene *out, const Scene &in, const FileDatabase &file) {
     ConversionData conv(file);
 
-    // FIXME it must be possible to take the hierarchy directly from
-    // the file. This is terrible. Here, we're first looking for
-    // all objects which don't have parent objects at all -
-    std::deque<const Object *> no_parents;
-    for (std::shared_ptr<Base> cur = std::static_pointer_cast<Base>(in.base.first); cur; cur = cur->next) {
-        if (cur->object) {
-            if (!cur->object->parent) {
-                no_parents.push_back(cur->object.get());
-            } else {
-                conv.objects.insert(cur->object.get());
-            }
-        }
-    }
-    for (std::shared_ptr<Base> cur = in.basact; cur; cur = cur->next) {
-        if (cur->object) {
-            if (cur->object->parent) {
-                conv.objects.insert(cur->object.get());
-            }
-        }
-    }
-
-    if (no_parents.empty()) {
-        ThrowException("Expected at least one object with no parent");
-    }
-
     aiNode *root = out->mRootNode = new aiNode("<BlenderRoot>");
+    // Iterate over all objects directly under master_collection,
+    // If in.master_collection == null, then we're parsing something older.
+    if (in.master_collection) {
+        ParseSubCollection(in, root, in.master_collection, conv);
+    } else {
+        std::deque<const Object *> no_parents;
+        for (std::shared_ptr<Base> cur = std::static_pointer_cast<Base>(in.base.first); cur; cur = cur->next) {
+            if (cur->object) {
+                if (!cur->object->parent) {
+                    no_parents.push_back(cur->object.get());
+                } else {
+                    conv.objects.insert(cur->object.get());
+                }
+            }
+        }
+        for (std::shared_ptr<Base> cur = in.basact; cur; cur = cur->next) {
+            if (cur->object) {
+                if (cur->object->parent) {
+                    conv.objects.insert(cur->object.get());
+                }
+            }
+        }
 
-    root->mNumChildren = static_cast<unsigned int>(no_parents.size());
-    root->mChildren = new aiNode *[root->mNumChildren]();
-    for (unsigned int i = 0; i < root->mNumChildren; ++i) {
-        root->mChildren[i] = ConvertNode(in, no_parents[i], conv, aiMatrix4x4());
-        root->mChildren[i]->mParent = root;
+        if (no_parents.empty()) {
+            ThrowException("Expected at least one object with no parent");
+        }
+
+        root->mNumChildren = static_cast<unsigned int>(no_parents.size());
+        root->mChildren = new aiNode *[root->mNumChildren]();
+        for (unsigned int i = 0; i < root->mNumChildren; ++i) {
+            root->mChildren[i] = ConvertNode(in, no_parents[i], conv, aiMatrix4x4());
+            root->mChildren[i]->mParent = root;
+        }
     }
 
     BuildMaterials(conv);
@@ -407,7 +359,7 @@ void BlenderImporter::ResolveImage(aiMaterial *out, const Material *mat, const M
     // check if the file contents are bundled with the BLEND file
     if (img->packedfile) {
         name.data[0] = '*';
-        name.length = 1 + ASSIMP_itoa10(name.data + 1, static_cast<unsigned int>(MAXLEN - 1), static_cast<int32_t>(conv_data.textures->size()));
+        name.length = 1 + ASSIMP_itoa10(name.data + 1, static_cast<unsigned int>(AI_MAXLEN - 1), static_cast<int32_t>(conv_data.textures->size()));
 
         conv_data.textures->push_back(new aiTexture());
         aiTexture *curTex = conv_data.textures->back();
@@ -481,7 +433,7 @@ void BlenderImporter::AddSentinelTexture(aiMaterial *out, const Material *mat, c
     (void)conv_data;
 
     aiString name;
-    name.length = ai_snprintf(name.data, MAXLEN, "Procedural,num=%i,type=%s", conv_data.sentinel_cnt++,
+    name.length = ai_snprintf(name.data, AI_MAXLEN, "Procedural,num=%i,type=%s", conv_data.sentinel_cnt++,
             GetTextureTypeDisplayString(tex->tex->type));
     out->AddProperty(&name, AI_MATKEY_TEXTURE_DIFFUSE(
                                     conv_data.next_texture[aiTextureType_DIFFUSE]++));
@@ -985,7 +937,7 @@ void BlenderImporter::ConvertMesh(const Scene & /*in*/, const Object * /*obj*/,
     // key is material number, value is the TextureUVMapping for the material
     typedef std::map<uint32_t, TextureUVMapping> MaterialTextureUVMappings;
     MaterialTextureUVMappings matTexUvMappings;
-    const uint32_t maxMat = static_cast<const uint32_t>(mesh->mat.size());
+    const uint32_t maxMat = static_cast<uint32_t>(mesh->mat.size());
     for (uint32_t m = 0; m < maxMat; ++m) {
         // get material by index
         const std::shared_ptr<Material> pMat = mesh->mat[m];
@@ -1336,4 +1288,55 @@ aiNode *BlenderImporter::ConvertNode(const Scene &in, const Object *obj, Convers
     return node.release();
 }
 
+BlenderImporter::StreamOrError BlenderImporter::ParseMagicToken(const std::string &pFile, IOSystem *pIOHandler) const {
+    std::shared_ptr<IOStream> stream(pIOHandler->Open(pFile, "rb"));
+    if (stream == nullptr) {
+        return {{}, {}, "Could not open file for reading"};
+    }
+
+    char magic[8] = { 0 };
+    stream->Read(magic, 7, 1);
+    if (strcmp(magic, Token) == 0) {
+        return {stream, {}, {}};
+    }
+
+    // Check for presence of the gzip header. If yes, assume it is a
+    // compressed blend file and try uncompressing it, else fail. This is to
+    // avoid uncompressing random files which our loader might end up with.
+#ifdef ASSIMP_BUILD_NO_COMPRESSED_BLEND
+    return {{}, {}, "BLENDER magic bytes are missing, is this file compressed (Assimp was built without decompression support)?"};
+#else
+    if (magic[0] != 0x1f || static_cast<uint8_t>(magic[1]) != 0x8b) {
+        return {{}, {}, "BLENDER magic bytes are missing, couldn't find GZIP header either"};
+    }
+
+    LogDebug("Found no BLENDER magic word but a GZIP header, might be a compressed file");
+    if (magic[2] != 8) {
+        return {{}, {}, "Unsupported GZIP compression method"};
+    }
+
+    // http://www.gzip.org/zlib/rfc-gzip.html#header-trailer
+    stream->Seek(0L, aiOrigin_SET);
+    std::shared_ptr<StreamReaderLE> reader = std::shared_ptr<StreamReaderLE>(new StreamReaderLE(stream));
+
+    size_t total = 0;
+    Compression compression;
+    auto uncompressed = std::make_shared<std::vector<char>>();
+    if (compression.open(Compression::Format::Binary, Compression::FlushMode::NoFlush, 16 + Compression::MaxWBits)) {
+        total = compression.decompress((unsigned char *)reader->GetPtr(), reader->GetRemainingSize(), *uncompressed);
+        compression.close();
+    }
+
+    // replace the input stream with a memory stream
+    stream = std::make_shared<MemoryIOStream>(reinterpret_cast<uint8_t *>(uncompressed->data()), total);
+
+    // .. and retry
+    stream->Read(magic, 7, 1);
+    if (strcmp(magic, Token) == 0) {
+        return {stream, uncompressed, {}};
+    }
+    return {{}, {}, "Found no BLENDER magic word in decompressed GZIP file"};
+#endif
+}
+
 #endif // ASSIMP_BUILD_NO_BLEND_IMPORTER

code/AssetLib/Blender/BlenderLoader.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -78,6 +78,7 @@ struct ElemBase;
 namespace Blender {
 struct Scene;
 struct Object;
+struct Collection;
 struct Mesh;
 struct Camera;
 struct Lamp;
@@ -116,6 +117,7 @@ protected:
     void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) override;
     void ParseBlendFile(Blender::FileDatabase &out, std::shared_ptr<IOStream> stream);
     void ExtractScene(Blender::Scene &out, const Blender::FileDatabase &file);
+    void ParseSubCollection(const Blender::Scene &in, aiNode *root, const std::shared_ptr<Blender::Collection>& collection, Blender::ConversionData &conv_data);
     void ConvertBlendFile(aiScene *out, const Blender::Scene &in, const Blender::FileDatabase &file);
 
 private:
@@ -178,6 +180,19 @@ private:
             const Blender::MTex *tex,
             Blender::ConversionData &conv_data);
 
+    // TODO: Move to a std::variant, once c++17 is supported.
+    struct StreamOrError {
+        std::shared_ptr<IOStream> stream;
+        std::shared_ptr<std::vector<char>> input;
+        std::string error;
+    };
+
+    // Returns either a stream (and optional input data for the stream) or
+    // an error if it can't parse the magic token.
+    StreamOrError ParseMagicToken(
+            const std::string &pFile,
+            IOSystem *pIOHandler) const;
+
 private: // static stuff, mostly logging and error reporting.
     // --------------------
     static void CheckActualType(const Blender::ElemBase *dt,

code/AssetLib/Blender/BlenderModifier.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -71,10 +71,6 @@ static const fpCreateModifier creators[] = {
     nullptr // sentinel
 };
 
-// ------------------------------------------------------------------------------------------------
-struct SharedModifierData : ElemBase {
-    ModifierData modifier;
-};
 
 // ------------------------------------------------------------------------------------------------
 void BlenderModifierShowcase::ApplyModifiers(aiNode &out, ConversionData &conv_data, const Scene &in, const Object &orig_object) {
@@ -157,6 +153,7 @@ void BlenderModifier_Mirror ::DoIt(aiNode &out, ConversionData &conv_data, const
     // hijacking the ABI, see the big note in BlenderModifierShowcase::ApplyModifiers()
     const MirrorModifierData &mir = static_cast<const MirrorModifierData &>(orig_modifier);
     ai_assert(mir.modifier.type == ModifierData::eModifierType_Mirror);
+    std::shared_ptr<Object> mirror_ob = mir.mirror_ob.lock();
 
     conv_data.meshes->reserve(conv_data.meshes->size() + out.mNumMeshes);
 
@@ -171,8 +168,8 @@ void BlenderModifier_Mirror ::DoIt(aiNode &out, ConversionData &conv_data, const
         const float ys = mir.flag & MirrorModifierData::Flags_AXIS_Y ? -1.f : 1.f;
         const float zs = mir.flag & MirrorModifierData::Flags_AXIS_Z ? -1.f : 1.f;
 
-        if (mir.mirror_ob) {
-            const aiVector3D center(mir.mirror_ob->obmat[3][0], mir.mirror_ob->obmat[3][1], mir.mirror_ob->obmat[3][2]);
+        if (mirror_ob) {
+            const aiVector3D center(mirror_ob->obmat[3][0], mirror_ob->obmat[3][1], mirror_ob->obmat[3][2]);
             for (unsigned int j = 0; j < mesh->mNumVertices; ++j) {
                 aiVector3D &v = mesh->mVertices[j];
 
@@ -286,6 +283,11 @@ void BlenderModifier_Subdivision ::DoIt(aiNode &out, ConversionData &conv_data,
     if (conv_data.meshes->empty()) {
         return;
     }
+    const size_t meshIndex = conv_data.meshes->size() - out.mNumMeshes;
+    if (meshIndex >= conv_data.meshes->size()) {
+        ASSIMP_LOG_ERROR("Invalid index detected.");
+        return;
+    }
     aiMesh **const meshes = &conv_data.meshes[conv_data.meshes->size() - out.mNumMeshes];
     std::unique_ptr<aiMesh *[]> tempmeshes(new aiMesh *[out.mNumMeshes]());
 

code/AssetLib/Blender/BlenderModifier.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -62,9 +62,7 @@ public:
     /**
      *  The class destructor, virtual.
      */
-    virtual ~BlenderModifier() {
-        // empty
-    }
+    virtual ~BlenderModifier() = default;
 
     // --------------------
     /**

code/AssetLib/Blender/BlenderScene.cpp

@@ -49,8 +49,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "BlenderDNA.h"
 #include "BlenderSceneGen.h"
 
-using namespace Assimp;
-using namespace Assimp::Blender;
+namespace Assimp {
+namespace Blender {
 
 //--------------------------------------------------------------------------------
 template <>
@@ -94,6 +94,48 @@ void Structure ::Convert<Group>(
     db.reader->IncPtr(size);
 }
 
+//--------------------------------------------------------------------------------
+template <>
+void Structure::Convert<CollectionObject>(
+        CollectionObject &dest,
+        const FileDatabase &db) const {
+
+    ReadFieldPtr<ErrorPolicy_Fail>(dest.next, "*next", db);
+    {
+        std::shared_ptr<Object> ob;
+        ReadFieldPtr<ErrorPolicy_Igno>(ob, "*ob", db);
+        dest.ob = ob.get();
+    }
+
+    db.reader->IncPtr(size);
+}
+
+//--------------------------------------------------------------------------------
+template <>
+void Structure::Convert<CollectionChild>(
+        CollectionChild &dest,
+        const FileDatabase &db) const {
+
+    ReadFieldPtr<ErrorPolicy_Fail>(dest.prev, "*prev", db);
+    ReadFieldPtr<ErrorPolicy_Fail>(dest.next, "*next", db);
+    ReadFieldPtr<ErrorPolicy_Igno>(dest.collection, "*collection", db);
+
+    db.reader->IncPtr(size);
+}
+
+//--------------------------------------------------------------------------------
+template <>
+void Structure::Convert<Collection>(
+        Collection &dest,
+        const FileDatabase &db) const {
+
+    ReadField<ErrorPolicy_Fail>(dest.id, "id", db);
+    ReadField<ErrorPolicy_Fail>(dest.gobject, "gobject", db);
+    ReadField<ErrorPolicy_Fail>(dest.children, "children", db);
+
+    db.reader->IncPtr(size);
+}
+
 //--------------------------------------------------------------------------------
 template <>
 void Structure ::Convert<MTex>(
@@ -255,7 +297,7 @@ void Structure ::Convert<Base>(
         const FileDatabase &db) const {
     // note: as per https://github.com/assimp/assimp/issues/128,
     // reading the Object linked list recursively is prone to stack overflow.
-    // This structure converter is therefore an hand-written exception that
+    // This structure converter is therefore a hand-written exception that
     // does it iteratively.
 
     const int initial_pos = db.reader->GetCurrentPos();
@@ -523,7 +565,7 @@ void Structure ::Convert<MVert>(
         const FileDatabase &db) const {
 
     ReadFieldArray<ErrorPolicy_Fail>(dest.co, "co", db);
-    ReadFieldArray<ErrorPolicy_Fail>(dest.no, "no", db);
+    ReadFieldArray<ErrorPolicy_Warn>(dest.no, "no", db);
     ReadField<ErrorPolicy_Igno>(dest.flag, "flag", db);
     //ReadField<ErrorPolicy_Warn>(dest.mat_nr,"mat_nr",db);
     ReadField<ErrorPolicy_Igno>(dest.bweight, "bweight", db);
@@ -578,7 +620,9 @@ void Structure ::Convert<ListBase>(
         const FileDatabase &db) const {
 
     ReadFieldPtr<ErrorPolicy_Igno>(dest.first, "*first", db);
-    ReadFieldPtr<ErrorPolicy_Igno>(dest.last, "*last", db);
+    std::shared_ptr<ElemBase> last;
+    ReadFieldPtr<ErrorPolicy_Igno>(last, "*last", db);
+    dest.last = last;
 
     db.reader->IncPtr(size);
 }
@@ -602,7 +646,9 @@ void Structure ::Convert<ModifierData>(
         const FileDatabase &db) const {
 
     ReadFieldPtr<ErrorPolicy_Warn>(dest.next, "*next", db);
-    ReadFieldPtr<ErrorPolicy_Warn>(dest.prev, "*prev", db);
+    std::shared_ptr<ElemBase> prev;
+    ReadFieldPtr<ErrorPolicy_Warn>(prev, "*prev", db);
+    dest.prev = prev;
     ReadField<ErrorPolicy_Igno>(dest.type, "type", db);
     ReadField<ErrorPolicy_Igno>(dest.mode, "mode", db);
     ReadFieldArray<ErrorPolicy_Igno>(dest.name, "name", db);
@@ -660,6 +706,7 @@ void Structure ::Convert<Scene>(
     ReadFieldPtr<ErrorPolicy_Warn>(dest.camera, "*camera", db);
     ReadFieldPtr<ErrorPolicy_Warn>(dest.world, "*world", db);
     ReadFieldPtr<ErrorPolicy_Warn>(dest.basact, "*basact", db);
+    ReadFieldPtr<ErrorPolicy_Warn>(dest.master_collection, "*master_collection", db);
     ReadField<ErrorPolicy_Igno>(dest.base, "base", db);
 
     db.reader->IncPtr(size);
@@ -725,7 +772,9 @@ void Structure ::Convert<MirrorModifierData>(
     ReadField<ErrorPolicy_Igno>(dest.axis, "axis", db);
     ReadField<ErrorPolicy_Igno>(dest.flag, "flag", db);
     ReadField<ErrorPolicy_Igno>(dest.tolerance, "tolerance", db);
-    ReadFieldPtr<ErrorPolicy_Igno>(dest.mirror_ob, "*mirror_ob", db);
+    std::shared_ptr<Object> mirror_ob;
+    ReadFieldPtr<ErrorPolicy_Igno>(mirror_ob, "*mirror_ob", db);
+    dest.mirror_ob = mirror_ob;
 
     db.reader->IncPtr(size);
 }
@@ -786,9 +835,9 @@ void Structure::Convert<CustomDataLayer>(
     ReadField<ErrorPolicy_Fail>(dest.flag, "flag", db);
     ReadField<ErrorPolicy_Fail>(dest.active, "active", db);
     ReadField<ErrorPolicy_Fail>(dest.active_rnd, "active_rnd", db);
-    ReadField<ErrorPolicy_Fail>(dest.active_clone, "active_clone", db);
-    ReadField<ErrorPolicy_Fail>(dest.active_mask, "active_mask", db);
-    ReadField<ErrorPolicy_Fail>(dest.uid, "uid", db);
+    ReadField<ErrorPolicy_Warn>(dest.active_clone, "active_clone", db);
+    ReadField<ErrorPolicy_Warn>(dest.active_mask, "active_mask", db);
+    ReadField<ErrorPolicy_Warn>(dest.uid, "uid", db);
     ReadFieldArray<ErrorPolicy_Warn>(dest.name, "name", db);
     ReadCustomDataPtr<ErrorPolicy_Fail>(dest.data, dest.type, "*data", db);
 
@@ -833,6 +882,12 @@ void DNA::RegisterConverters() {
     converters["Image"] = DNA::FactoryPair(&Structure::Allocate<Image>, &Structure::Convert<Image>);
     converters["CustomData"] = DNA::FactoryPair(&Structure::Allocate<CustomData>, &Structure::Convert<CustomData>);
     converters["CustomDataLayer"] = DNA::FactoryPair(&Structure::Allocate<CustomDataLayer>, &Structure::Convert<CustomDataLayer>);
+    converters["Collection"] = DNA::FactoryPair(&Structure::Allocate<Collection>, &Structure::Convert<Collection>);
+    converters["CollectionChild"] = DNA::FactoryPair(&Structure::Allocate<CollectionChild>, &Structure::Convert<CollectionChild>);
+    converters["CollectionObject"] = DNA::FactoryPair(&Structure::Allocate<CollectionObject>, &Structure::Convert<CollectionObject>);
 }
 
+} // namespace Blender
+} //namespace Assimp
+
 #endif // ASSIMP_BUILD_NO_BLEND_IMPORTER

code/AssetLib/Blender/BlenderScene.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -107,6 +107,7 @@ namespace Blender {
 struct Object;
 struct MTex;
 struct Image;
+struct Collection;
 
 #include <memory>
 
@@ -123,7 +124,7 @@ struct ID : ElemBase {
 // -------------------------------------------------------------------------------
 struct ListBase : ElemBase {
     std::shared_ptr<ElemBase> first;
-    std::shared_ptr<ElemBase> last;
+    std::weak_ptr<ElemBase> last;
 };
 
 // -------------------------------------------------------------------------------
@@ -147,6 +148,26 @@ struct Group : ElemBase {
     std::shared_ptr<GroupObject> gobject;
 };
 
+// -------------------------------------------------------------------------------
+struct CollectionObject : ElemBase {
+    //CollectionObject* prev;
+    std::shared_ptr<CollectionObject> next;
+    Object *ob;
+};
+
+// -------------------------------------------------------------------------------
+struct CollectionChild : ElemBase {
+    std::shared_ptr<CollectionChild> next, prev;
+    std::shared_ptr<Collection> collection;
+};
+
+// -------------------------------------------------------------------------------
+struct Collection : ElemBase {
+    ID id FAIL;
+    ListBase gobject; // CollectionObject
+    ListBase children; // CollectionChild
+};
+
 // -------------------------------------------------------------------------------
 struct World : ElemBase {
     ID id FAIL;
@@ -161,7 +182,7 @@ struct MVert : ElemBase {
     int bweight;
 
     MVert() :
-            ElemBase(), flag(0), mat_nr(0), bweight(0) {}
+            flag(0), mat_nr(0), bweight(0) {}
 };
 
 // -------------------------------------------------------------------------------
@@ -396,7 +417,6 @@ struct CustomDataLayer : ElemBase {
     std::shared_ptr<ElemBase> data; // must be converted to real type according type member
 
     CustomDataLayer() :
-            ElemBase(),
             type(0),
             offset(0),
             flag(0),
@@ -621,14 +641,21 @@ struct ModifierData : ElemBase {
     };
 
     std::shared_ptr<ElemBase> next WARN;
-    std::shared_ptr<ElemBase> prev WARN;
+    std::weak_ptr<ElemBase> prev WARN;
 
     int type, mode;
     char name[32];
 };
 
+
+// ------------------------------------------------------------------------------------------------
+struct SharedModifierData : ElemBase {
+    ModifierData modifier;
+};
+
+
 // -------------------------------------------------------------------------------
-struct SubsurfModifierData : ElemBase {
+struct SubsurfModifierData : SharedModifierData {
 
     enum Type {
 
@@ -641,7 +668,6 @@ struct SubsurfModifierData : ElemBase {
         FLAGS_SubsurfUV = 1 << 3
     };
 
-    ModifierData modifier FAIL;
     short subdivType WARN;
     short levels FAIL;
     short renderLevels;
@@ -649,7 +675,7 @@ struct SubsurfModifierData : ElemBase {
 };
 
 // -------------------------------------------------------------------------------
-struct MirrorModifierData : ElemBase {
+struct MirrorModifierData : SharedModifierData {
 
     enum Flags {
         Flags_CLIPPING = 1 << 0,
@@ -661,11 +687,9 @@ struct MirrorModifierData : ElemBase {
         Flags_VGROUP = 1 << 6
     };
 
-    ModifierData modifier FAIL;
-
     short axis, flag;
     float tolerance;
-    std::shared_ptr<Object> mirror_ob;
+    std::weak_ptr<Object> mirror_ob;
 };
 
 // -------------------------------------------------------------------------------
@@ -704,7 +728,7 @@ struct Object : ElemBase {
     ListBase modifiers;
 
     Object() :
-            ElemBase(), type(Type_EMPTY), parent(nullptr), track(), proxy(), proxy_from(), data() {
+            type(Type_EMPTY), parent(nullptr) {
         // empty
     }
 };
@@ -716,8 +740,7 @@ struct Base : ElemBase {
     std::shared_ptr<Object> object WARN;
 
     Base() :
-            ElemBase(), prev(nullptr), next(), object() {
-        // empty
+            prev(nullptr) {
         // empty
     }
 };
@@ -729,13 +752,11 @@ struct Scene : ElemBase {
     std::shared_ptr<Object> camera WARN;
     std::shared_ptr<World> world WARN;
     std::shared_ptr<Base> basact WARN;
+    std::shared_ptr<Collection> master_collection WARN;
 
     ListBase base;
 
-    Scene() :
-            ElemBase(), camera(), world(), basact() {
-        // empty
-    }
+    Scene() = default;
 };
 
 // -------------------------------------------------------------------------------
@@ -765,10 +786,7 @@ struct Image : ElemBase {
 
     short gen_x, gen_y, gen_type;
 
-    Image() :
-            ElemBase() {
-        // empty
-    }
+    Image() = default;
 };
 
 // -------------------------------------------------------------------------------
@@ -858,7 +876,7 @@ struct Tex : ElemBase {
     //char use_nodes;
 
     Tex() :
-            ElemBase(), imaflag(ImageFlags_INTERPOL), type(Type_CLOUDS), ima() {
+            imaflag(ImageFlags_INTERPOL), type(Type_CLOUDS) {
         // empty
     }
 };
@@ -950,10 +968,7 @@ struct MTex : ElemBase {
     //float shadowfac;
     //float zenupfac, zendownfac, blendfac;
 
-    MTex() :
-            ElemBase() {
-        // empty
-    }
+    MTex() = default;
 };
 
 } // namespace Blender

code/AssetLib/Blender/BlenderSceneGen.h

@@ -62,6 +62,12 @@ template <> void Structure :: Convert<Group> (
     ) const
 ;
 
+template <> void Structure::Convert<Collection>(
+    Collection& dest,
+    const FileDatabase& db
+    ) const
+;
+
 template <> void Structure :: Convert<MTex> (
     MTex& dest,
     const FileDatabase& db

code/AssetLib/Blender/BlenderTessellator.cpp

@@ -2,8 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
-
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -40,10 +39,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ----------------------------------------------------------------------
 */
 
-/** @file  BlenderTessellator.cpp
- *  @brief A simple tessellation wrapper
- */
-
+/// @file  BlenderTessellator.cpp
+/// @brief A simple tessellation wrapper
 
 #ifndef ASSIMP_BUILD_NO_BLEND_IMPORTER
 
@@ -62,8 +59,7 @@ namspace Assimp
 {
     template< > const char* LogFunctions< BlenderTessellatorGL >::Prefix()
     {
-        static auto prefix = "BLEND_TESS_GL: ";
-        return prefix;
+        return "BLEND_TESS_GL: ";
     }
 }
 
@@ -81,9 +77,7 @@ BlenderTessellatorGL::BlenderTessellatorGL( BlenderBMeshConverter& converter ):
 }
 
 // ------------------------------------------------------------------------------------------------
-BlenderTessellatorGL::~BlenderTessellatorGL( )
-{
-}
+BlenderTessellatorGL::~BlenderTessellatorGL() = default;
 
 // ------------------------------------------------------------------------------------------------
 void BlenderTessellatorGL::Tessellate( const MLoop* polyLoop, int vertexCount, const std::vector< MVert >& vertices )
@@ -259,8 +253,7 @@ namespace Assimp
 {
     template< > const char* LogFunctions< BlenderTessellatorP2T >::Prefix()
     {
-        static auto prefix = "BLEND_TESS_P2T: ";
-        return prefix;
+        return "BLEND_TESS_P2T: ";
     }
 }
 
@@ -274,9 +267,7 @@ BlenderTessellatorP2T::BlenderTessellatorP2T( BlenderBMeshConverter& converter )
 }
 
 // ------------------------------------------------------------------------------------------------
-BlenderTessellatorP2T::~BlenderTessellatorP2T( )
-{
-}
+
 
 // ------------------------------------------------------------------------------------------------
 void BlenderTessellatorP2T::Tessellate( const MLoop* polyLoop, int vertexCount, const std::vector< MVert >& vertices )

code/AssetLib/Blender/BlenderTessellator.h

@@ -2,8 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
-
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -144,11 +143,7 @@ namespace Assimp
 
 #if ASSIMP_BLEND_WITH_POLY_2_TRI
 
-#ifdef ASSIMP_USE_HUNTER
-#  include <poly2tri/poly2tri.h>
-#else
-#  include "../contrib/poly2tri/poly2tri/poly2tri.h"
-#endif
+#include "contrib/poly2tri/poly2tri/poly2tri.h"
 
 namespace Assimp
 {
@@ -186,7 +181,7 @@ namespace Assimp
     {
     public:
         BlenderTessellatorP2T( BlenderBMeshConverter& converter );
-        ~BlenderTessellatorP2T( );
+        ~BlenderTessellatorP2T( ) = default;
 
         void Tessellate( const Blender::MLoop* polyLoop, int vertexCount, const std::vector< Blender::MVert >& vertices );
 

code/AssetLib/C4D/C4DImporter.cpp

@@ -46,10 +46,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 // no #ifdefing here, Cinema4D support is carried out in a branch of assimp
 // where it is turned on in the CMake settings.
 
-#ifndef _MSC_VER
-#   error C4D support is currently MSVC only
-#endif
-
 #include "C4DImporter.h"
 #include <memory>
 #include <assimp/IOSystem.hpp>
@@ -86,8 +82,7 @@ void GetWriterInfo(int &id, String &appname) {
 
 namespace Assimp {
     template<> const char* LogFunctions<C4DImporter>::Prefix() {
-        static auto prefix = "C4D: ";
-        return prefix;
+        return "C4D: ";
     }
 }
 
@@ -105,6 +100,12 @@ static const aiImporterDesc desc = {
 };
 
 
+// ------------------------------------------------------------------------------------------------
+C4DImporter::C4DImporter() = default;
+
+// ------------------------------------------------------------------------------------------------
+C4DImporter::~C4DImporter() = default;
+
 // ------------------------------------------------------------------------------------------------
 bool C4DImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const {
     const std::string& extension = GetExtension(pFile);
@@ -300,7 +301,7 @@ void C4DImporter::RecurseHierarchy(BaseObject* object, aiNode* parent) {
 
     // based on Cineware sample code
     while (object) {
-        const LONG type = object->GetType();
+        const Int32 type = object->GetType();
         const Matrix& ml = object->GetMl();
 
         aiNode* const nd = new aiNode();
@@ -363,8 +364,8 @@ aiMesh* C4DImporter::ReadMesh(BaseObject* object) {
     PolygonObject* const polyObject = dynamic_cast<PolygonObject*>(object);
     ai_assert(polyObject != nullptr);
 
-    const LONG pointCount = polyObject->GetPointCount();
-    const LONG polyCount = polyObject->GetPolygonCount();
+    const Int32 pointCount = polyObject->GetPointCount();
+    const Int32 polyCount = polyObject->GetPolygonCount();
     if(!polyObject || !pointCount) {
         LogWarn("ignoring mesh with zero vertices or faces");
         return nullptr;
@@ -386,7 +387,7 @@ aiMesh* C4DImporter::ReadMesh(BaseObject* object) {
     unsigned int vcount = 0;
 
     // first count vertices
-    for (LONG i = 0; i < polyCount; i++)
+    for (Int32 i = 0; i < polyCount; i++)
     {
         vcount += 3;
 
@@ -429,7 +430,7 @@ aiMesh* C4DImporter::ReadMesh(BaseObject* object) {
     }
 
     // copy vertices and extra channels over and populate faces
-    for (LONG i = 0; i < polyCount; ++i, ++face) {
+    for (Int32 i = 0; i < polyCount; ++i, ++face) {
         ai_assert(polys[i].a < pointCount && polys[i].a >= 0);
         const Vector& pointA = points[polys[i].a];
         verts->x = pointA.x;
@@ -506,7 +507,7 @@ aiMesh* C4DImporter::ReadMesh(BaseObject* object) {
         if (tangents_src) {
 
             for(unsigned int k = 0; k < face->mNumIndices; ++k) {
-                LONG l;
+                Int32 l;
                 switch(k) {
                 case 0:
                     l = polys[i].a;

code/AssetLib/C4D/C4DImporter.h

@@ -78,6 +78,8 @@ namespace Assimp  {
 // -------------------------------------------------------------------------------------------
 class C4DImporter : public BaseImporter, public LogFunctions<C4DImporter> {
 public:
+    C4DImporter();
+    ~C4DImporter() override;
     bool CanRead( const std::string& pFile, IOSystem*, bool checkSig) const override;
 
 protected:

code/AssetLib/COB/COBLoader.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -61,11 +61,11 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <memory>
 
-using namespace Assimp;
+namespace Assimp {
 using namespace Assimp::COB;
 using namespace Assimp::Formatter;
 
-static const float units[] = {
+static constexpr float units[] = {
     1000.f,
     100.f,
     1.f,
@@ -76,7 +76,7 @@ static const float units[] = {
     1.f / 1609.344f
 };
 
-static const aiImporterDesc desc = {
+static constexpr aiImporterDesc desc = {
     "TrueSpace Object Importer",
     "",
     "",
@@ -89,31 +89,11 @@ static const aiImporterDesc desc = {
     "cob scn"
 };
 
-// ------------------------------------------------------------------------------------------------
-// Constructor to be privately used by Importer
-COBImporter::COBImporter() {
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-// Destructor, private as well
-COBImporter::~COBImporter() {
-    // empty
-}
-
 // ------------------------------------------------------------------------------------------------
 // Returns whether the class can handle the format of the given file.
-bool COBImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const {
-    const std::string &extension = GetExtension(pFile);
-    if (extension == "cob" || extension == "scn" || extension == "COB" || extension == "SCN") {
-        return true;
-    }
-
-    else if ((!extension.length() || checkSig) && pIOHandler) {
-        static const char * const tokens[] = { "Caligary" };
-        return SearchFileHeaderForToken(pIOHandler, pFile, tokens, 1);
-    }
-    return false;
+bool COBImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*checkSig*/) const {
+    static const char *tokens[] = { "Caligary" };
+    return SearchFileHeaderForToken(pIOHandler, pFile, tokens, AI_COUNT_OF(tokens));
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -170,7 +150,7 @@ void COBImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
     // sort faces by material indices
     for (std::shared_ptr<Node> &n : scene.nodes) {
         if (n->type == Node::TYPE_MESH) {
-            Mesh &mesh = (Mesh &)(*n.get());
+            Mesh &mesh = (Mesh &)(*n);
             for (Face &f : mesh.faces) {
                 mesh.temp_map[f.material].push_back(&f);
             }
@@ -180,7 +160,7 @@ void COBImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
     // count meshes
     for (std::shared_ptr<Node> &n : scene.nodes) {
         if (n->type == Node::TYPE_MESH) {
-            Mesh &mesh = (Mesh &)(*n.get());
+            Mesh &mesh = (Mesh &)(*n);
             if (mesh.vertex_positions.size() && mesh.texture_coords.size()) {
                 pScene->mNumMeshes += static_cast<unsigned int>(mesh.temp_map.size());
             }
@@ -223,7 +203,7 @@ void COBImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
         }
     }
 
-    pScene->mRootNode = BuildNodes(*root.get(), scene, pScene);
+    pScene->mRootNode = BuildNodes(*root, scene, pScene);
     //flip normals after import
     FlipWindingOrderProcess flip;
     flip.Execute(pScene);
@@ -392,9 +372,11 @@ aiNode *COBImporter::BuildNodes(const Node &root, const Scene &scin, aiScene *fi
     }
 
     // add children recursively
-    nd->mChildren = new aiNode *[root.temp_children.size()]();
-    for (const Node *n : root.temp_children) {
-        (nd->mChildren[nd->mNumChildren++] = BuildNodes(*n, scin, fill))->mParent = nd;
+    if (!root.temp_children.empty()) {
+        nd->mChildren = new aiNode *[root.temp_children.size()]();
+        for (const Node *n : root.temp_children) {
+            (nd->mChildren[nd->mNumChildren++] = BuildNodes(*n, scin, fill))->mParent = nd;
+        }
     }
 
     return nd;
@@ -493,8 +475,9 @@ void COBImporter::ReadBasicNodeInfo_Ascii(Node &msh, LineSplitter &splitter, con
         } else if (splitter.match_start("Transform")) {
             for (unsigned int y = 0; y < 4 && ++splitter; ++y) {
                 const char *s = splitter->c_str();
+                const char *end = s + splitter->size();
                 for (unsigned int x = 0; x < 4; ++x) {
-                    SkipSpaces(&s);
+                    SkipSpaces(&s, end);
                     msh.transform[y][x] = fast_atof(&s);
                 }
             }
@@ -506,12 +489,12 @@ void COBImporter::ReadBasicNodeInfo_Ascii(Node &msh, LineSplitter &splitter, con
 
 // ------------------------------------------------------------------------------------------------
 template <typename T>
-void COBImporter::ReadFloat3Tuple_Ascii(T &fill, const char **in) {
+void COBImporter::ReadFloat3Tuple_Ascii(T &fill, const char **in, const char *end) {
     const char *rgb = *in;
     for (unsigned int i = 0; i < 3; ++i) {
-        SkipSpaces(&rgb);
+        SkipSpaces(&rgb, end);
         if (*rgb == ',') ++rgb;
-        SkipSpaces(&rgb);
+        SkipSpaces(&rgb, end);
 
         fill[i] = fast_atof(&rgb);
     }
@@ -530,7 +513,7 @@ void COBImporter::ReadMat1_Ascii(Scene &out, LineSplitter &splitter, const Chunk
         return;
     }
 
-    out.materials.push_back(Material());
+    out.materials.emplace_back();
     Material &mat = out.materials.back();
     mat = nfo;
 
@@ -558,7 +541,7 @@ void COBImporter::ReadMat1_Ascii(Scene &out, LineSplitter &splitter, const Chunk
     }
 
     const char *rgb = splitter[1];
-    ReadFloat3Tuple_Ascii(mat.rgb, &rgb);
+    ReadFloat3Tuple_Ascii(mat.rgb, &rgb, splitter.getEnd());
 
     ++splitter;
     if (!splitter.match_start("alpha ")) {
@@ -637,20 +620,21 @@ void COBImporter::ReadLght_Ascii(Scene &out, LineSplitter &splitter, const Chunk
     }
 
     const char *rgb = splitter[1];
-    ReadFloat3Tuple_Ascii(msh.color, &rgb);
+    const char *end = splitter.getEnd();
+    ReadFloat3Tuple_Ascii(msh.color, &rgb, end);
 
-    SkipSpaces(&rgb);
+    SkipSpaces(&rgb, end);
     if (strncmp(rgb, "cone angle", 10) != 0) {
         ASSIMP_LOG_WARN("Expected `cone angle` entity in `color` line in `Lght` chunk ", nfo.id);
     }
-    SkipSpaces(rgb + 10, &rgb);
+    SkipSpaces(rgb + 10, &rgb, end);
     msh.angle = fast_atof(&rgb);
 
-    SkipSpaces(&rgb);
+    SkipSpaces(&rgb, end);
     if (strncmp(rgb, "inner angle", 11) != 0) {
         ASSIMP_LOG_WARN("Expected `inner angle` entity in `color` line in `Lght` chunk ", nfo.id);
     }
-    SkipSpaces(rgb + 11, &rgb);
+    SkipSpaces(rgb + 11, &rgb, end);
     msh.inner_angle = fast_atof(&rgb);
 
     // skip the rest for we can't handle this kind of physically-based lighting information.
@@ -723,14 +707,14 @@ void COBImporter::ReadPolH_Ascii(Scene &out, LineSplitter &splitter, const Chunk
 
             for (unsigned int cur = 0; cur < cnt && ++splitter; ++cur) {
                 const char *s = splitter->c_str();
-
+                const char *end = splitter.getEnd();
                 aiVector3D &v = msh.vertex_positions[cur];
 
-                SkipSpaces(&s);
+                SkipSpaces(&s, end);
                 v.x = fast_atof(&s);
-                SkipSpaces(&s);
+                SkipSpaces(&s, end);
                 v.y = fast_atof(&s);
-                SkipSpaces(&s);
+                SkipSpaces(&s, end);
                 v.z = fast_atof(&s);
             }
         } else if (splitter.match_start("Texture Vertices")) {
@@ -739,12 +723,13 @@ void COBImporter::ReadPolH_Ascii(Scene &out, LineSplitter &splitter, const Chunk
 
             for (unsigned int cur = 0; cur < cnt && ++splitter; ++cur) {
                 const char *s = splitter->c_str();
+                const char *end = splitter.getEnd();
 
                 aiVector2D &v = msh.texture_coords[cur];
 
-                SkipSpaces(&s);
+                SkipSpaces(&s, end);
                 v.x = fast_atof(&s);
-                SkipSpaces(&s);
+                SkipSpaces(&s, end);
                 v.y = fast_atof(&s);
             }
         } else if (splitter.match_start("Faces")) {
@@ -761,7 +746,7 @@ void COBImporter::ReadPolH_Ascii(Scene &out, LineSplitter &splitter, const Chunk
                     ThrowException("Expected Face line");
                 }
 
-                msh.faces.push_back(Face());
+                msh.faces.emplace_back();
                 Face &face = msh.faces.back();
 
                 face.indices.resize(strtoul10(splitter[2]));
@@ -769,8 +754,9 @@ void COBImporter::ReadPolH_Ascii(Scene &out, LineSplitter &splitter, const Chunk
                 face.material = strtoul10(splitter[6]);
 
                 const char *s = (++splitter)->c_str();
+                const char *end = splitter.getEnd();
                 for (size_t i = 0; i < face.indices.size(); ++i) {
-                    if (!SkipSpaces(&s)) {
+                    if (!SkipSpaces(&s, end)) {
                         ThrowException("Expected EOL token in Face entry");
                     }
                     if ('<' != *s++) {
@@ -880,7 +866,7 @@ void COBImporter::ReadBinaryFile(Scene &out, StreamReaderLE *reader) {
         return;
     }
 
-    while (1) {
+    while (true) {
         std::string type;
         type += reader->GetI1();
         type += reader->GetI1();
@@ -964,7 +950,7 @@ void COBImporter::ReadPolH_Binary(COB::Scene &out, StreamReaderLE &reader, const
                 ThrowException(format("A hole is the first entity in the `PolH` chunk with id ") << nfo.id);
             }
         } else
-            msh.faces.push_back(Face());
+            msh.faces.emplace_back();
         Face &f = msh.faces.back();
 
         const size_t num = reader.GetI2();
@@ -976,7 +962,7 @@ void COBImporter::ReadPolH_Binary(COB::Scene &out, StreamReaderLE &reader, const
         }
 
         for (size_t x = 0; x < num; ++x) {
-            f.indices.push_back(VertexIndex());
+            f.indices.emplace_back();
 
             VertexIndex &v = f.indices.back();
             v.pos_idx = reader.GetI4();
@@ -1016,7 +1002,7 @@ void COBImporter::ReadMat1_Binary(COB::Scene &out, StreamReaderLE &reader, const
 
     const chunk_guard cn(nfo, reader);
 
-    out.materials.push_back(Material());
+    out.materials.emplace_back();
     Material &mat = out.materials.back();
     mat = nfo;
 
@@ -1066,7 +1052,7 @@ void COBImporter::ReadMat1_Binary(COB::Scene &out, StreamReaderLE &reader, const
     id[0] = reader.GetI1(), id[1] = reader.GetI1();
 
     if (id[0] == 'e' && id[1] == ':') {
-        mat.tex_env.reset(new Texture());
+        mat.tex_env = std::make_shared<Texture>();
 
         reader.GetI1();
         ReadString_Binary(mat.tex_env->path, reader);
@@ -1076,7 +1062,7 @@ void COBImporter::ReadMat1_Binary(COB::Scene &out, StreamReaderLE &reader, const
     }
 
     if (id[0] == 't' && id[1] == ':') {
-        mat.tex_color.reset(new Texture());
+        mat.tex_color = std::make_shared<Texture>();
 
         reader.GetI1();
         ReadString_Binary(mat.tex_color->path, reader);
@@ -1092,7 +1078,7 @@ void COBImporter::ReadMat1_Binary(COB::Scene &out, StreamReaderLE &reader, const
     }
 
     if (id[0] == 'b' && id[1] == ':') {
-        mat.tex_bump.reset(new Texture());
+        mat.tex_bump = std::make_shared<Texture>();
 
         reader.GetI1();
         ReadString_Binary(mat.tex_bump->path, reader);
@@ -1184,4 +1170,6 @@ void COBImporter::ReadUnit_Binary(COB::Scene &out, StreamReaderLE &reader, const
     ASSIMP_LOG_WARN("`Unit` chunk ", nfo.id, " is a child of ", nfo.parent_id, " which does not exist");
 }
 
+}
+
 #endif // ASSIMP_BUILD_NO_COB_IMPORTER

code/AssetLib/COB/COBLoader.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -56,16 +56,16 @@ class LineSplitter;
 
 // TinyFormatter.h
 namespace Formatter {
-template <typename T, typename TR, typename A>
-class basic_formatter;
-typedef class basic_formatter<char, std::char_traits<char>, std::allocator<char>> format;
+    template <typename T, typename TR, typename A>
+    class basic_formatter;
+    typedef class basic_formatter<char, std::char_traits<char>, std::allocator<char>> format;
 } // namespace Formatter
 
 // COBScene.h
 namespace COB {
-struct ChunkInfo;
-struct Node;
-struct Scene;
+    struct ChunkInfo;
+    struct Node;
+    struct Scene;
 } // namespace COB
 
 // -------------------------------------------------------------------------------------------
@@ -75,8 +75,8 @@ struct Scene;
 // -------------------------------------------------------------------------------------------
 class COBImporter : public BaseImporter {
 public:
-    COBImporter();
-    ~COBImporter() override;
+    COBImporter() = default;
+    ~COBImporter() override = default;
 
     // --------------------
     bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
@@ -120,7 +120,7 @@ private:
     void ReadChunkInfo_Ascii(COB::ChunkInfo &out, const LineSplitter &splitter);
     void ReadBasicNodeInfo_Ascii(COB::Node &msh, LineSplitter &splitter, const COB::ChunkInfo &nfo);
     template <typename T>
-    void ReadFloat3Tuple_Ascii(T &fill, const char **in);
+    void ReadFloat3Tuple_Ascii(T &fill, const char **in, const char *end);
 
     void ReadPolH_Ascii(COB::Scene &out, LineSplitter &splitter, const COB::ChunkInfo &nfo);
     void ReadBitM_Ascii(COB::Scene &out, LineSplitter &splitter, const COB::ChunkInfo &nfo);

code/AssetLib/COB/COBScene.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -107,7 +107,7 @@ struct Node : public ChunkInfo
         TYPE_MESH,TYPE_GROUP,TYPE_LIGHT,TYPE_CAMERA,TYPE_BONE
     };
 
-    virtual ~Node() {}
+    virtual ~Node() = default;
     Node(Type type) : type(type), unit_scale(1.f){}
 
     Type type;

code/AssetLib/CSM/CSMLoader.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 
@@ -44,9 +44,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 /** @file  CSMLoader.cpp
  *  Implementation of the CSM importer class.
  */
-
-
-
 #ifndef ASSIMP_BUILD_NO_CSM_IMPORTER
 
 #include "CSMLoader.h"
@@ -63,7 +60,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 using namespace Assimp;
 
-static const aiImporterDesc desc = {
+static constexpr aiImporterDesc desc = {
     "CharacterStudio Motion Importer (MoCap)",
     "",
     "",
@@ -79,43 +76,26 @@ static const aiImporterDesc desc = {
 
 // ------------------------------------------------------------------------------------------------
 // Constructor to be privately used by Importer
-CSMImporter::CSMImporter()
-: noSkeletonMesh()
-{}
-
-// ------------------------------------------------------------------------------------------------
-// Destructor, private as well
-CSMImporter::~CSMImporter()
-{}
+CSMImporter::CSMImporter() : noSkeletonMesh(){
+    // empty
+}
 
 // ------------------------------------------------------------------------------------------------
 // Returns whether the class can handle the format of the given file.
-bool CSMImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const
-{
-    // check file extension
-    const std::string extension = GetExtension(pFile);
-
-    if( extension == "csm")
-        return true;
-
-    if ((checkSig || !extension.length()) && pIOHandler) {
-        static const char * const tokens[] = {"$Filename"};
-        return SearchFileHeaderForToken(pIOHandler,pFile,tokens,1);
-    }
-    return false;
+bool CSMImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool /*checkSig*/) const {
+    static const char* tokens[] = {"$Filename"};
+    return SearchFileHeaderForToken(pIOHandler,pFile,tokens,AI_COUNT_OF(tokens));
 }
 
 // ------------------------------------------------------------------------------------------------
 // Build a string of all file extensions supported
-const aiImporterDesc* CSMImporter::GetInfo () const
-{
+const aiImporterDesc* CSMImporter::GetInfo () const {
     return &desc;
 }
 
 // ------------------------------------------------------------------------------------------------
 // Setup configuration properties for the loader
-void CSMImporter::SetupProperties(const Importer* pImp)
-{
+void CSMImporter::SetupProperties(const Importer* pImp) {
     noSkeletonMesh = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_NO_SKELETON_MESHES,0) != 0;
 }
 
@@ -127,7 +107,7 @@ void CSMImporter::InternReadFile( const std::string& pFile,
     std::unique_ptr<IOStream> file( pIOHandler->Open( pFile, "rb"));
 
     // Check whether we can read from the file
-    if( file.get() == nullptr) {
+    if (file == nullptr) {
         throw DeadlyImportError( "Failed to open CSM file ", pFile, ".");
     }
 
@@ -135,38 +115,38 @@ void CSMImporter::InternReadFile( const std::string& pFile,
     std::vector<char> mBuffer2;
     TextFileToBuffer(file.get(),mBuffer2);
     const char* buffer = &mBuffer2[0];
-
+    const char *end = &mBuffer2[mBuffer2.size() - 1] + 1;
     std::unique_ptr<aiAnimation> anim(new aiAnimation());
     int first = 0, last = 0x00ffffff;
 
     // now process the file and look out for '$' sections
-    while (1)   {
-        SkipSpaces(&buffer);
+    while (true) {
+        SkipSpaces(&buffer, end);
         if ('\0' == *buffer)
             break;
 
         if ('$'  == *buffer)    {
             ++buffer;
             if (TokenMatchI(buffer,"firstframe",10))    {
-                SkipSpaces(&buffer);
+                SkipSpaces(&buffer, end);
                 first = strtol10(buffer,&buffer);
             }
             else if (TokenMatchI(buffer,"lastframe",9))     {
-                SkipSpaces(&buffer);
+                SkipSpaces(&buffer, end);
                 last = strtol10(buffer,&buffer);
             }
             else if (TokenMatchI(buffer,"rate",4))  {
-                SkipSpaces(&buffer);
-                float d;
+                SkipSpaces(&buffer, end);
+                float d = { 0.0f };
                 buffer = fast_atoreal_move<float>(buffer,d);
                 anim->mTicksPerSecond = d;
             }
             else if (TokenMatchI(buffer,"order",5)) {
                 std::vector< aiNodeAnim* > anims_temp;
                 anims_temp.reserve(30);
-                while (1)   {
-                    SkipSpaces(&buffer);
-                    if (IsLineEnd(*buffer) && SkipSpacesAndLineEnd(&buffer) && *buffer == '$')
+                while (true) {
+                    SkipSpaces(&buffer, end);
+                    if (IsLineEnd(*buffer) && SkipSpacesAndLineEnd(&buffer, end) && *buffer == '$')
                         break; // next section
 
                     // Construct a new node animation channel and setup its name
@@ -174,41 +154,43 @@ void CSMImporter::InternReadFile( const std::string& pFile,
                     aiNodeAnim* nda = anims_temp.back();
 
                     char* ot = nda->mNodeName.data;
-                    while (!IsSpaceOrNewLine(*buffer))
+                    while (!IsSpaceOrNewLine(*buffer)) {
                         *ot++ = *buffer++;
+                    }
 
                     *ot = '\0';
                     nda->mNodeName.length = static_cast<ai_uint32>(ot-nda->mNodeName.data);
                 }
 
                 anim->mNumChannels = static_cast<unsigned int>(anims_temp.size());
-                if (!anim->mNumChannels)
+                if (!anim->mNumChannels) {
                     throw DeadlyImportError("CSM: Empty $order section");
+                }
 
                 // copy over to the output animation
                 anim->mChannels = new aiNodeAnim*[anim->mNumChannels];
                 ::memcpy(anim->mChannels,&anims_temp[0],sizeof(aiNodeAnim*)*anim->mNumChannels);
-            }
-            else if (TokenMatchI(buffer,"points",6))    {
-                if (!anim->mNumChannels)
+            } else if (TokenMatchI(buffer,"points",6)) {
+                if (!anim->mNumChannels) {
                     throw DeadlyImportError("CSM: \'$order\' section is required to appear prior to \'$points\'");
+                }
 
                 // If we know how many frames we'll read, we can preallocate some storage
                 unsigned int alloc = 100;
-                if (last != 0x00ffffff)
-                {
+                if (last != 0x00ffffff) {
                     alloc = last-first;
                     alloc += alloc>>2u; // + 25%
-                    for (unsigned int i = 0; i < anim->mNumChannels;++i)
+                    for (unsigned int i = 0; i < anim->mNumChannels; ++i) {
                         anim->mChannels[i]->mPositionKeys = new aiVectorKey[alloc];
+                    }
                 }
 
                 unsigned int filled = 0;
 
                 // Now read all point data.
-                while (1)   {
-                    SkipSpaces(&buffer);
-                    if (IsLineEnd(*buffer) && (!SkipSpacesAndLineEnd(&buffer) || *buffer == '$'))   {
+                while (true) {
+                    SkipSpaces(&buffer, end);
+                    if (IsLineEnd(*buffer) && (!SkipSpacesAndLineEnd(&buffer, end) || *buffer == '$'))   {
                         break; // next section
                     }
 
@@ -219,8 +201,8 @@ void CSMImporter::InternReadFile( const std::string& pFile,
                     for (unsigned int i = 0; i < anim->mNumChannels;++i)    {
 
                         aiNodeAnim* s = anim->mChannels[i];
-                        if (s->mNumPositionKeys == alloc)   { /* need to reallocate? */
-
+                        if (s->mNumPositionKeys == alloc)   {
+                            // need to reallocate?
                             aiVectorKey* old = s->mPositionKeys;
                             s->mPositionKeys = new aiVectorKey[s->mNumPositionKeys = alloc*2];
                             ::memcpy(s->mPositionKeys,old,sizeof(aiVectorKey)*alloc);
@@ -228,24 +210,26 @@ void CSMImporter::InternReadFile( const std::string& pFile,
                         }
 
                         // read x,y,z
-                        if(!SkipSpacesAndLineEnd(&buffer))
+                        if (!SkipSpacesAndLineEnd(&buffer, end)) {
                             throw DeadlyImportError("CSM: Unexpected EOF occurred reading sample x coord");
+                        }
 
                         if (TokenMatchI(buffer, "DROPOUT", 7))  {
                             // seems this is invalid marker data; at least the doc says it's possible
                             ASSIMP_LOG_WARN("CSM: Encountered invalid marker data (DROPOUT)");
-                        }
-                        else    {
+                        } else {
                             aiVectorKey* sub = s->mPositionKeys + s->mNumPositionKeys;
                             sub->mTime = (double)frame;
                             buffer = fast_atoreal_move<float>(buffer, (float&)sub->mValue.x);
 
-                            if(!SkipSpacesAndLineEnd(&buffer))
+                            if (!SkipSpacesAndLineEnd(&buffer, end)) {
                                 throw DeadlyImportError("CSM: Unexpected EOF occurred reading sample y coord");
+                            }
                             buffer = fast_atoreal_move<float>(buffer, (float&)sub->mValue.y);
 
-                            if(!SkipSpacesAndLineEnd(&buffer))
+                            if (!SkipSpacesAndLineEnd(&buffer, end)) {
                                 throw DeadlyImportError("CSM: Unexpected EOF occurred reading sample z coord");
+                            }
                             buffer = fast_atoreal_move<float>(buffer, (float&)sub->mValue.z);
 
                             ++s->mNumPositionKeys;
@@ -253,22 +237,22 @@ void CSMImporter::InternReadFile( const std::string& pFile,
                     }
 
                     // update allocation granularity
-                    if (filled == alloc)
+                    if (filled == alloc) {
                         alloc *= 2;
+                    }
 
                     ++filled;
                 }
                 // all channels must be complete in order to continue safely.
                 for (unsigned int i = 0; i < anim->mNumChannels;++i)    {
-
-                    if (!anim->mChannels[i]->mNumPositionKeys)
+                    if (!anim->mChannels[i]->mNumPositionKeys) {
                         throw DeadlyImportError("CSM: Invalid marker track");
+                    }
                 }
             }
-        }
-        else    {
+        } else {
             // advance to the next line
-            SkipLine(&buffer);
+            SkipLine(&buffer, end);
         }
     }
 
@@ -282,7 +266,7 @@ void CSMImporter::InternReadFile( const std::string& pFile,
     pScene->mRootNode->mNumChildren = anim->mNumChannels;
     pScene->mRootNode->mChildren = new aiNode* [anim->mNumChannels];
 
-    for (unsigned int i = 0; i < anim->mNumChannels;++i)    {
+    for (unsigned int i = 0; i < anim->mNumChannels;++i) {
         aiNodeAnim* na = anim->mChannels[i];
 
         aiNode* nd  = pScene->mRootNode->mChildren[i] = new aiNode();

code/AssetLib/CSM/CSMLoader.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -61,7 +61,7 @@ namespace Assimp {
 class CSMImporter : public BaseImporter {
 public:
     CSMImporter();
-    ~CSMImporter() override;
+    ~CSMImporter() override = default;
 
     // -------------------------------------------------------------------
     bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
@@ -81,9 +81,8 @@ protected:
 private:
     bool noSkeletonMesh;
 
-}; // end of class CSMImporter
+};
 
-} // end of namespace Assimp
+} // namespace Assimp
 
 #endif // AI_AC3DIMPORTER_H_INC
-

code/AssetLib/Collada/ColladaExporter.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -91,7 +91,7 @@ void ExportSceneCollada(const char *pFile, IOSystem *pIOSystem, const aiScene *p
 // Encodes a string into a valid XML ID using the xsd:ID schema qualifications.
 static const std::string XMLIDEncode(const std::string &name) {
     const char XML_ID_CHARS[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_-.";
-    const unsigned int XML_ID_CHARS_COUNT = sizeof(XML_ID_CHARS) / sizeof(char);
+    const unsigned int XML_ID_CHARS_COUNT = sizeof(XML_ID_CHARS) / sizeof(char) - 1;
 
     if (name.length() == 0) {
         return name;
@@ -154,8 +154,7 @@ ColladaExporter::ColladaExporter(const aiScene *pScene, IOSystem *pIOSystem, con
 
 // ------------------------------------------------------------------------------------------------
 // Destructor
-ColladaExporter::~ColladaExporter() {
-}
+ColladaExporter::~ColladaExporter() = default;
 
 // ------------------------------------------------------------------------------------------------
 // Starts writing the contents
@@ -247,7 +246,7 @@ void ColladaExporter::WriteHeader() {
     }
 
     // Assimp root nodes can have meshes, Collada Scenes cannot
-    if (mScene->mRootNode->mNumChildren == 0 || mScene->mRootNode->mMeshes != 0) {
+    if (mScene->mRootNode->mNumChildren == 0 || mScene->mRootNode->mMeshes != nullptr) {
         mAdd_root_node = true;
     }
 
@@ -449,7 +448,7 @@ void ColladaExporter::WriteLight(size_t pIndex) {
     PushTag();
     switch (light->mType) {
     case aiLightSource_AMBIENT:
-        WriteAmbienttLight(light);
+        WriteAmbientLight(light);
         break;
     case aiLightSource_DIRECTIONAL:
         WriteDirectionalLight(light);
@@ -544,7 +543,7 @@ void ColladaExporter::WriteSpotLight(const aiLight *const light) {
     mOutput << startstr << "</spot>" << endstr;
 }
 
-void ColladaExporter::WriteAmbienttLight(const aiLight *const light) {
+void ColladaExporter::WriteAmbientLight(const aiLight *const light) {
 
     const aiColor3D &color = light->mColorAmbient;
     mOutput << startstr << "<ambient>" << endstr;
@@ -1330,9 +1329,9 @@ void ColladaExporter::WriteAnimationLibrary(size_t pIndex) {
             std::vector<std::string> names;
             for (size_t i = 0; i < nodeAnim->mNumPositionKeys; ++i) {
                 if (nodeAnim->mPreState == aiAnimBehaviour_DEFAULT || nodeAnim->mPreState == aiAnimBehaviour_LINEAR || nodeAnim->mPreState == aiAnimBehaviour_REPEAT) {
-                    names.push_back("LINEAR");
+                    names.emplace_back("LINEAR");
                 } else if (nodeAnim->mPostState == aiAnimBehaviour_CONSTANT) {
-                    names.push_back("STEP");
+                    names.emplace_back("STEP");
                 }
             }
 

code/AssetLib/Collada/ColladaExporter.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -101,7 +101,7 @@ protected:
     void WritePointLight(const aiLight *const light);
     void WriteDirectionalLight(const aiLight *const light);
     void WriteSpotLight(const aiLight *const light);
-    void WriteAmbienttLight(const aiLight *const light);
+    void WriteAmbientLight(const aiLight *const light);
 
     /// Writes the controller library
     void WriteControllerLibrary();
@@ -233,7 +233,7 @@ public:
         Surface ambient, diffuse, specular, emissive, reflective, transparent, normal;
         Property shininess, transparency, index_refraction;
 
-        Material() {}
+        Material() = default;
     };
 
     std::map<unsigned int, std::string> textures;

code/AssetLib/Collada/ColladaHelper.cpp

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 

code/AssetLib/Collada/ColladaHelper.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -621,6 +621,11 @@ struct Animation {
 
         for (std::vector<Animation *>::iterator it = pParent->mSubAnims.begin(); it != pParent->mSubAnims.end();) {
             Animation *anim = *it;
+            // Assign the first animation name to the parent if empty.
+            // This prevents the animation name from being lost when animations are combined
+            if (mName.empty()) {
+              mName = anim->mName;
+            }
             CombineSingleChannelAnimationsRecursively(anim);
 
             if (childrenAnimationsHaveDifferentChannels && anim->mChannels.size() == 1 &&
@@ -661,7 +666,7 @@ struct ChannelEntry {
     const Collada::Accessor *mTimeAccessor; ///> Collada accessor to the time values
     const Collada::Data *mTimeData; ///> Source data array for the time values
     const Collada::Accessor *mValueAccessor; ///> Collada accessor to the key value values
-    const Collada::Data *mValueData; ///> Source datat array for the key value values
+    const Collada::Data *mValueData; ///> Source data array for the key value values
 
     ChannelEntry() :
             mChannel(),

code/AssetLib/Collada/ColladaLoader.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -64,7 +64,7 @@ namespace Assimp {
 using namespace Assimp::Formatter;
 using namespace Assimp::Collada;
 
-static const aiImporterDesc desc = {
+static constexpr aiImporterDesc desc = {
     "Collada Importer",
     "",
     "",
@@ -92,67 +92,34 @@ inline void AddNodeMetaData(aiNode *node, const std::string &key, const T &value
 // ------------------------------------------------------------------------------------------------
 // Constructor to be privately used by Importer
 ColladaLoader::ColladaLoader() :
-        mFileName(),
-        mMeshIndexByID(),
-        mMaterialIndexByName(),
-        mMeshes(),
-        newMats(),
-        mCameras(),
-        mLights(),
-        mTextures(),
-        mAnims(),
         noSkeletonMesh(false),
+        removeEmptyBones(false),
         ignoreUpDirection(false),
+        ignoreUnitSize(false),
         useColladaName(false),
         mNodeNameCounter(0) {
     // empty
 }
 
-// ------------------------------------------------------------------------------------------------
-// Destructor, private as well
-ColladaLoader::~ColladaLoader() {
-    // empty
-}
-
 // ------------------------------------------------------------------------------------------------
 // Returns whether the class can handle the format of the given file.
-bool ColladaLoader::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const {
-    // check file extension
-    const std::string extension = GetExtension(pFile);
-    const bool readSig = checkSig && (pIOHandler != nullptr);
-    if (!readSig) {
-        if (extension == "dae" || extension == "zae") {
-            return true;
-        }
-    } else {
-        // Look for a DAE file inside, but don't extract it
-        ZipArchiveIOSystem zip_archive(pIOHandler, pFile);
-        if (zip_archive.isOpen()) {
-            return !ColladaParser::ReadZaeManifest(zip_archive).empty();
-        }
+bool ColladaLoader::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*checkSig*/) const {
+    // Look for a DAE file inside, but don't extract it
+    ZipArchiveIOSystem zip_archive(pIOHandler, pFile);
+    if (zip_archive.isOpen()) {
+        return !ColladaParser::ReadZaeManifest(zip_archive).empty();
     }
 
-    // XML - too generic, we need to open the file and search for typical keywords
-    if (extension == "xml" || !extension.length() || checkSig) {
-        //  If CanRead() is called in order to check whether we
-        //  support a specific file extension in general pIOHandler
-        //  might be nullptr and it's our duty to return true here.
-        if (nullptr == pIOHandler) {
-            return true;
-        }
-        static const char * const tokens[] = {
-            "<collada"
-        };
-        return SearchFileHeaderForToken(pIOHandler, pFile, tokens, 1);
-    }
-
-    return false;
+    static const char *tokens[] = { "<collada" };
+    return SearchFileHeaderForToken(pIOHandler, pFile, tokens, AI_COUNT_OF(tokens));
 }
 
 // ------------------------------------------------------------------------------------------------
 void ColladaLoader::SetupProperties(const Importer *pImp) {
     noSkeletonMesh = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_NO_SKELETON_MESHES, 0) != 0;
+    removeEmptyBones = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_REMOVE_EMPTY_BONES, true) != 0;
     ignoreUpDirection = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_COLLADA_IGNORE_UP_DIRECTION, 0) != 0;
+    ignoreUnitSize = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_COLLADA_IGNORE_UNIT_SIZE, 0) != 0;
     useColladaName = pImp->GetPropertyInteger(AI_CONFIG_IMPORT_COLLADA_USE_COLLADA_NAMES, 0) != 0;
 }
 
@@ -201,12 +168,15 @@ void ColladaLoader::InternReadFile(const std::string &pFile, aiScene *pScene, IO
     // ... then fill the materials with the now adjusted settings
     FillMaterials(parser, pScene);
 
-    // Apply unit-size scale calculation
-
-    pScene->mRootNode->mTransformation *= aiMatrix4x4(parser.mUnitSize, 0, 0, 0,
-            0, parser.mUnitSize, 0, 0,
-            0, 0, parser.mUnitSize, 0,
-            0, 0, 0, 1);
+    if (!ignoreUnitSize) {
+        // Apply unit-size scale calculation
+        pScene->mRootNode->mTransformation *= aiMatrix4x4(
+                parser.mUnitSize, 0, 0, 0,
+                0, parser.mUnitSize, 0, 0,
+                0, 0, parser.mUnitSize, 0,
+                0, 0, 0, 1);
+    }
+    
     if (!ignoreUpDirection) {
         // Convert to Y_UP, if different orientation
         if (parser.mUpDirection == ColladaParser::UP_X) {
@@ -277,7 +247,9 @@ aiNode *ColladaLoader::BuildHierarchy(const ColladaParser &pParser, const Collad
 
     // add children. first the *real* ones
     node->mNumChildren = static_cast<unsigned int>(pNode->mChildren.size() + instances.size());
-    node->mChildren = new aiNode *[node->mNumChildren];
+    if (node->mNumChildren != 0) {
+        node->mChildren = new aiNode * [node->mNumChildren];
+    }
 
     for (size_t a = 0; a < pNode->mChildren.size(); ++a) {
         node->mChildren[a] = BuildHierarchy(pParser, pNode->mChildren[a]);
@@ -379,9 +351,9 @@ void ColladaLoader::BuildLightsForNode(const ColladaParser &pParser, const Node
             out->mAngleInnerCone = AI_DEG_TO_RAD(srcLight->mFalloffAngle);
 
             // ... some extension magic.
-            if (srcLight->mOuterAngle >= ASSIMP_COLLADA_LIGHT_ANGLE_NOT_SET * (1 - 1e-6f)) {
+            if (srcLight->mOuterAngle >= ASSIMP_COLLADA_LIGHT_ANGLE_NOT_SET * (1 - ai_epsilon)) {
                 // ... some deprecation magic.
-                if (srcLight->mPenumbraAngle >= ASSIMP_COLLADA_LIGHT_ANGLE_NOT_SET * (1 - 1e-6f)) {
+                if (srcLight->mPenumbraAngle >= ASSIMP_COLLADA_LIGHT_ANGLE_NOT_SET * (1 - ai_epsilon)) {
                     // Need to rely on falloff_exponent. I don't know how to interpret it, so I need to guess ....
                     // epsilon chosen to be 0.1
                     float f = 1.0f;
@@ -653,16 +625,14 @@ aiMesh *ColladaLoader::CreateMesh(const ColladaParser &pParser, const Mesh *pSrc
     }
 
     // same for texture coords, as many as we have
-    // empty slots are not allowed, need to pack and adjust UV indexes accordingly
-    for (size_t a = 0, real = 0; a < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++a) {
+    for (size_t a = 0; a < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++a) {
         if (pSrcMesh->mTexCoords[a].size() >= pStartVertex + numVertices) {
-            dstMesh->mTextureCoords[real] = new aiVector3D[numVertices];
+            dstMesh->mTextureCoords[a] = new aiVector3D[numVertices];
             for (size_t b = 0; b < numVertices; ++b) {
-                dstMesh->mTextureCoords[real][b] = pSrcMesh->mTexCoords[a][pStartVertex + b];
+                dstMesh->mTextureCoords[a][b] = pSrcMesh->mTexCoords[a][pStartVertex + b];
             }
 
-            dstMesh->mNumUVComponents[real] = pSrcMesh->mNumUVComponents[a];
-            ++real;
+            dstMesh->mNumUVComponents[a] = pSrcMesh->mNumUVComponents[a];
         }
     }
 
@@ -820,9 +790,10 @@ aiMesh *ColladaLoader::CreateMesh(const ColladaParser &pParser, const Mesh *pSrc
         // count the number of bones which influence vertices of the current submesh
         size_t numRemainingBones = 0;
         for (const auto & dstBone : dstBones) {
-            if (!dstBone.empty()) {
-                ++numRemainingBones;
+            if (dstBone.empty() && removeEmptyBones) {
+                continue;
             }
+            ++numRemainingBones;
         }
 
         // create bone array and copy bone weights one by one
@@ -831,7 +802,7 @@ aiMesh *ColladaLoader::CreateMesh(const ColladaParser &pParser, const Mesh *pSrc
         size_t boneCount = 0;
         for (size_t a = 0; a < numBones; ++a) {
             // omit bones without weights
-            if (dstBones[a].empty()) {
+            if (dstBones[a].empty() && removeEmptyBones) {
                 continue;
             }
 
@@ -1087,7 +1058,7 @@ void insertMorphTimeValue(std::vector<MorphTimeValues> &values, float time, floa
         return;
     }
     for (unsigned int i = 0; i < values.size(); i++) {
-        if (std::abs(time - values[i].mTime) < 1e-6f) {
+        if (std::abs(time - values[i].mTime) < ai_epsilon) {
             values[i].mKeys.push_back(k);
             return;
         } else if (time > values[i].mTime && time < values[i + 1].mTime) {
@@ -1285,12 +1256,12 @@ void ColladaLoader::CreateAnimation(aiScene *pScene, const ColladaParser &pParse
             // now for every unique point in time, find or interpolate the key values for that time
             // and apply them to the transform chain. Then the node's present transformation can be calculated.
             ai_real time = startTime;
-            while (1) {
+            while (true) {
                 for (ChannelEntry & e : entries) {
                     // find the keyframe behind the current point in time
                     size_t pos = 0;
                     ai_real postTime = 0.0;
-                    while (1) {
+                    while (true) {
                         if (pos >= e.mTimeAccessor->mCount) {
                             break;
                         }
@@ -1544,7 +1515,7 @@ void ColladaLoader::AddTexture(aiMaterial &mat,
         map = -1;
         for (std::string::const_iterator it = sampler.mUVChannel.begin(); it != sampler.mUVChannel.end(); ++it) {
             if (IsNumeric(*it)) {
-                map = strtoul10(&(*it));        
+                map = strtoul10(&(*it));
                 break;
             }
         }
@@ -1701,7 +1672,7 @@ aiString ColladaLoader::FindFilenameForEffectTexture(const ColladaParser &pParse
 
     // recurse through the param references until we end up at an image
     std::string name = pName;
-    while (1) {
+    while (true) {
         // the given string is a param entry. Find it
         Effect::ParamLibrary::const_iterator it = pEffect.mParams.find(name);
         // if not found, we're at the end of the recursion. The resulting string should be the image ID

code/AssetLib/Collada/ColladaLoader.h

@@ -4,7 +4,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -86,7 +86,7 @@ public:
     ColladaLoader();
 
     /// The class destructor.
-    ~ColladaLoader() override;
+    ~ColladaLoader() override = default;
 
     /// Returns whether the class can handle the format of the given file.
     /// @see BaseImporter::CanRead() for more details.
@@ -237,7 +237,9 @@ protected:
     std::vector<aiAnimation *> mAnims;
 
     bool noSkeletonMesh;
+    bool removeEmptyBones;
     bool ignoreUpDirection;
+    bool ignoreUnitSize;
     bool useColladaName;
 
     /** Used by FindNameForNode() to generate unique node names */

code/AssetLib/Collada/ColladaParser.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -55,6 +55,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/DefaultLogger.hpp>
 #include <assimp/IOSystem.hpp>
 #include <memory>
+#include <utility>
 
 using namespace Assimp;
 using namespace Assimp::Collada;
@@ -67,7 +68,7 @@ static void ReportWarning(const char *msg, ...) {
     va_start(args, msg);
 
     char szBuffer[3000];
-    const int iLen = vsprintf(szBuffer, msg, args);
+    const int iLen = vsnprintf(szBuffer, sizeof(szBuffer), msg, args);
     ai_assert(iLen > 0);
 
     va_end(args);
@@ -144,7 +145,7 @@ ColladaParser::ColladaParser(IOSystem *pIOHandler, const std::string &pFile) :
     } else {
         // attempt to open the file directly
         daefile.reset(pIOHandler->Open(pFile));
-        if (daefile.get() == nullptr) {
+        if (daefile == nullptr) {
             throw DeadlyImportError("Failed to open file '", pFile, "'.");
         }
     }
@@ -331,7 +332,16 @@ void ColladaParser::ReadAssetInfo(XmlNode &node) {
         const std::string &currentName = currentNode.name();
         if (currentName == "unit") {
             mUnitSize = 1.f;
-            XmlParser::getRealAttribute(currentNode, "meter", mUnitSize);
+            std::string tUnitSizeString;
+            if (XmlParser::getStdStrAttribute(currentNode, "meter", tUnitSizeString)) {
+                try {
+                    fast_atoreal_move<ai_real>(tUnitSizeString.data(), mUnitSize);
+                } catch (const DeadlyImportError& die) {
+                    std::string warning("Collada: Failed to parse meter parameter to real number. Exception:\n");
+                    warning.append(die.what());
+                    ASSIMP_LOG_WARN(warning.data());
+                }
+            }
         } else if (currentName == "up_axis") {
             std::string v;
             if (!XmlParser::getValueAsString(currentNode, v)) {
@@ -625,7 +635,8 @@ void ColladaParser::ReadController(XmlNode &node, Collada::Controller &controlle
         const std::string &currentName = currentNode.name();
         if (currentName == "morph") {
             controller.mType = Morph;
-            controller.mMeshId = currentNode.attribute("source").as_string();
+            std::string id = currentNode.attribute("source").as_string();
+            controller.mMeshId = id.substr(1, id.size() - 1);
             int methodIndex = currentNode.attribute("method").as_int();
             if (methodIndex > 0) {
                 std::string method;
@@ -644,12 +655,13 @@ void ColladaParser::ReadController(XmlNode &node, Collada::Controller &controlle
             std::string v;
             XmlParser::getValueAsString(currentNode, v);
             const char *content = v.c_str();
+            const char *end = content + v.size();
             for (unsigned int a = 0; a < 16; a++) {
-                SkipSpacesAndLineEnd(&content);
+                SkipSpacesAndLineEnd(&content, end);
                 // read a number
                 content = fast_atoreal_move<ai_real>(content, controller.mBindShapeMatrix[a]);
                 // skip whitespace after it
-                SkipSpacesAndLineEnd(&content);
+                SkipSpacesAndLineEnd(&content, end);
             }
         } else if (currentName == "source") {
             ReadSource(currentNode);
@@ -730,7 +742,9 @@ void ColladaParser::ReadControllerWeights(XmlNode &node, Collada::Controller &pC
                 throw DeadlyImportError("Unknown semantic \"", attrSemantic, "\" in <vertex_weights> data <input> element");
             }
         } else if (currentName == "vcount" && vertexCount > 0) {
-            const char *text = currentNode.text().as_string();
+            const std::string stdText = currentNode.text().as_string();
+            const char *text = stdText.c_str();
+            const char *end = text + stdText.size();
             size_t numWeights = 0;
             for (std::vector<size_t>::iterator it = pController.mWeightCounts.begin(); it != pController.mWeightCounts.end(); ++it) {
                 if (*text == 0) {
@@ -739,7 +753,7 @@ void ColladaParser::ReadControllerWeights(XmlNode &node, Collada::Controller &pC
 
                 *it = strtoul10(text, &text);
                 numWeights += *it;
-                SkipSpacesAndLineEnd(&text);
+                SkipSpacesAndLineEnd(&text, end);
             }
             // reserve weight count
             pController.mWeights.resize(numWeights);
@@ -748,17 +762,19 @@ void ColladaParser::ReadControllerWeights(XmlNode &node, Collada::Controller &pC
             std::string stdText;
             XmlParser::getValueAsString(currentNode, stdText);
             const char *text = stdText.c_str();
+            const char *end = text + stdText.size();
             for (std::vector<std::pair<size_t, size_t>>::iterator it = pController.mWeights.begin(); it != pController.mWeights.end(); ++it) {
-                if (text == 0) {
+                if (text == nullptr) {
                     throw DeadlyImportError("Out of data while reading <vertex_weights>");
                 }
+                SkipSpacesAndLineEnd(&text, end);
                 it->first = strtoul10(text, &text);
-                SkipSpacesAndLineEnd(&text);
+                SkipSpacesAndLineEnd(&text, end);
                 if (*text == 0) {
                     throw DeadlyImportError("Out of data while reading <vertex_weights>");
                 }
                 it->second = strtoul10(text, &text);
-                SkipSpacesAndLineEnd(&text);
+                SkipSpacesAndLineEnd(&text, end);
             }
         }
     }
@@ -803,38 +819,38 @@ void ColladaParser::ReadImage(XmlNode &node, Collada::Image &pImage) {
                 if (!pImage.mFileName.length()) {
                     pImage.mFileName = "unknown_texture";
                 }
-            }
-        } else if (mFormat == FV_1_5_n) {
-            std::string value;
-            XmlNode refChild = currentNode.child("ref");
-            XmlNode hexChild = currentNode.child("hex");
-            if (refChild) {
-                // element content is filename - hopefully
-                if (XmlParser::getValueAsString(refChild, value)) {
-                    aiString filepath(value);
-                    UriDecodePath(filepath);
-                    pImage.mFileName = filepath.C_Str();
-                }
-            } else if (hexChild && !pImage.mFileName.length()) {
-                // embedded image. get format
-                pImage.mEmbeddedFormat = hexChild.attribute("format").as_string();
-                if (pImage.mEmbeddedFormat.empty()) {
-                    ASSIMP_LOG_WARN("Collada: Unknown image file format");
-                }
+            } else if (mFormat == FV_1_5_n) {
+                std::string value;
+                XmlNode refChild = currentNode.child("ref");
+                XmlNode hexChild = currentNode.child("hex");
+                if (refChild) {
+                    // element content is filename - hopefully
+                    if (XmlParser::getValueAsString(refChild, value)) {
+                        aiString filepath(value);
+                        UriDecodePath(filepath);
+                        pImage.mFileName = filepath.C_Str();
+                    }
+                } else if (hexChild && !pImage.mFileName.length()) {
+                    // embedded image. get format
+                    pImage.mEmbeddedFormat = hexChild.attribute("format").as_string();
+                    if (pImage.mEmbeddedFormat.empty()) {
+                        ASSIMP_LOG_WARN("Collada: Unknown image file format");
+                    }
 
-                XmlParser::getValueAsString(hexChild, value);
-                const char *data = value.c_str();
-                // hexadecimal-encoded binary octets. First of all, find the
-                // required buffer size to reserve enough storage.
-                const char *cur = data;
-                while (!IsSpaceOrNewLine(*cur)) {
-                    ++cur;
-                }
+                    XmlParser::getValueAsString(hexChild, value);
+                    const char *data = value.c_str();
+                    // hexadecimal-encoded binary octets. First of all, find the
+                    // required buffer size to reserve enough storage.
+                    const char *cur = data;
+                    while (!IsSpaceOrNewLine(*cur)) {
+                        ++cur;
+                    }
 
-                const unsigned int size = (unsigned int)(cur - data) * 2;
-                pImage.mImageData.resize(size);
-                for (unsigned int i = 0; i < size; ++i) {
-                    pImage.mImageData[i] = HexOctetToDecimal(data + (i << 1));
+                    const unsigned int size = (unsigned int)(cur - data) * 2;
+                    pImage.mImageData.resize(size);
+                    for (unsigned int i = 0; i < size; ++i) {
+                        pImage.mImageData[i] = HexOctetToDecimal(data + (i << 1));
+                    }
                 }
             }
         }
@@ -924,6 +940,8 @@ void ColladaParser::ReadMaterial(XmlNode &node, Collada::Material &pMaterial) {
 void ColladaParser::ReadLight(XmlNode &node, Collada::Light &pLight) {
     XmlNodeIterator xmlIt(node, XmlNodeIterator::PreOrderMode);
     XmlNode currentNode;
+    // TODO: Check the current technique and skip over unsupported extra techniques
+
     while (xmlIt.getNext(currentNode)) {
         const std::string &currentName = currentNode.name();
         if (currentName == "spot") {
@@ -939,43 +957,45 @@ void ColladaParser::ReadLight(XmlNode &node, Collada::Light &pLight) {
             std::string v;
             XmlParser::getValueAsString(currentNode, v);
             const char *content = v.c_str();
+            const char *end = content + v.size();
 
             content = fast_atoreal_move<ai_real>(content, (ai_real &)pLight.mColor.r);
-            SkipSpacesAndLineEnd(&content);
+            SkipSpacesAndLineEnd(&content, end);
 
             content = fast_atoreal_move<ai_real>(content, (ai_real &)pLight.mColor.g);
-            SkipSpacesAndLineEnd(&content);
+            SkipSpacesAndLineEnd(&content, end);
 
             content = fast_atoreal_move<ai_real>(content, (ai_real &)pLight.mColor.b);
-            SkipSpacesAndLineEnd(&content);
+            SkipSpacesAndLineEnd(&content, end);
         } else if (currentName == "constant_attenuation") {
-            XmlParser::getRealAttribute(currentNode, "constant_attenuation", pLight.mAttConstant);
+            XmlParser::getValueAsReal(currentNode, pLight.mAttConstant);
         } else if (currentName == "linear_attenuation") {
-            XmlParser::getRealAttribute(currentNode, "linear_attenuation", pLight.mAttLinear);
+            XmlParser::getValueAsReal(currentNode, pLight.mAttLinear);
         } else if (currentName == "quadratic_attenuation") {
-            XmlParser::getRealAttribute(currentNode, "quadratic_attenuation", pLight.mAttQuadratic);
+            XmlParser::getValueAsReal(currentNode, pLight.mAttQuadratic);
         } else if (currentName == "falloff_angle") {
-            XmlParser::getRealAttribute(currentNode, "falloff_angle", pLight.mFalloffAngle);
+            XmlParser::getValueAsReal(currentNode, pLight.mFalloffAngle);
         } else if (currentName == "falloff_exponent") {
-            XmlParser::getRealAttribute(currentNode, "falloff_exponent", pLight.mFalloffExponent);
+            XmlParser::getValueAsReal(currentNode, pLight.mFalloffExponent);
         }
         // FCOLLADA extensions
         // -------------------------------------------------------
         else if (currentName == "outer_cone") {
-            XmlParser::getRealAttribute(currentNode, "outer_cone", pLight.mOuterAngle);
-        } else if (currentName == "penumbra_angle") { // ... and this one is even deprecated
-            XmlParser::getRealAttribute(currentNode, "penumbra_angle", pLight.mPenumbraAngle);
+            XmlParser::getValueAsReal(currentNode, pLight.mOuterAngle);
+        } else if (currentName == "penumbra_angle") { // this one is deprecated, now calculated using outer_cone
+            XmlParser::getValueAsReal(currentNode, pLight.mPenumbraAngle);
         } else if (currentName == "intensity") {
-            XmlParser::getRealAttribute(currentNode, "intensity", pLight.mIntensity);
-        } else if (currentName == "falloff") {
-            XmlParser::getRealAttribute(currentNode, "falloff", pLight.mOuterAngle);
+            XmlParser::getValueAsReal(currentNode, pLight.mIntensity);
+        }
+        else if (currentName == "falloff") {
+            XmlParser::getValueAsReal(currentNode, pLight.mOuterAngle);
         } else if (currentName == "hotspot_beam") {
-            XmlParser::getRealAttribute(currentNode, "hotspot_beam", pLight.mFalloffAngle);
+            XmlParser::getValueAsReal(currentNode, pLight.mFalloffAngle);
         }
         // OpenCOLLADA extensions
         // -------------------------------------------------------
         else if (currentName == "decay_falloff") {
-            XmlParser::getRealAttribute(currentNode, "decay_falloff", pLight.mOuterAngle);
+            XmlParser::getValueAsReal(currentNode, pLight.mOuterAngle);
         }
     }
 }
@@ -990,15 +1010,15 @@ void ColladaParser::ReadCamera(XmlNode &node, Collada::Camera &camera) {
         if (currentName == "orthographic") {
             camera.mOrtho = true;
         } else if (currentName == "xfov" || currentName == "xmag") {
-            XmlParser::getValueAsFloat(currentNode, camera.mHorFov);
+            XmlParser::getValueAsReal(currentNode, camera.mHorFov);
         } else if (currentName == "yfov" || currentName == "ymag") {
-            XmlParser::getValueAsFloat(currentNode, camera.mVerFov);
+            XmlParser::getValueAsReal(currentNode, camera.mVerFov);
         } else if (currentName == "aspect_ratio") {
-            XmlParser::getValueAsFloat(currentNode, camera.mAspect);
+            XmlParser::getValueAsReal(currentNode, camera.mAspect);
         } else if (currentName == "znear") {
-            XmlParser::getValueAsFloat(currentNode, camera.mZNear);
+            XmlParser::getValueAsReal(currentNode, camera.mZNear);
         } else if (currentName == "zfar") {
-            XmlParser::getValueAsFloat(currentNode, camera.mZFar);
+            XmlParser::getValueAsReal(currentNode, camera.mZFar);
         }
     }
 }
@@ -1109,7 +1129,7 @@ void ColladaParser::ReadEffectProfileCommon(XmlNode &node, Collada::Effect &pEff
         // GOOGLEEARTH/OKINO extensions
         // -------------------------------------------------------
         else if (currentName == "double_sided")
-            XmlParser::getBoolAttribute(currentNode, currentName.c_str(), pEffect.mDoubleSided);
+            XmlParser::getValueAsBool(currentNode, pEffect.mDoubleSided);
 
         // FCOLLADA extensions
         // -------------------------------------------------------
@@ -1121,9 +1141,9 @@ void ColladaParser::ReadEffectProfileCommon(XmlNode &node, Collada::Effect &pEff
         // MAX3D extensions
         // -------------------------------------------------------
         else if (currentName == "wireframe") {
-            XmlParser::getBoolAttribute(currentNode, currentName.c_str(), pEffect.mWireframe);
+            XmlParser::getValueAsBool(currentNode, pEffect.mWireframe);
         } else if (currentName == "faceted") {
-            XmlParser::getBoolAttribute(currentNode, currentName.c_str(), pEffect.mFaceted);
+            XmlParser::getValueAsBool(currentNode, pEffect.mFaceted);
         }
     }
 }
@@ -1142,23 +1162,23 @@ void ColladaParser::ReadSamplerProperties(XmlNode &node, Sampler &out) {
         // MAYA extensions
         // -------------------------------------------------------
         if (currentName == "wrapU") {
-            XmlParser::getBoolAttribute(currentNode, currentName.c_str(), out.mWrapU);
+            XmlParser::getValueAsBool(currentNode, out.mWrapU);
         } else if (currentName == "wrapV") {
-            XmlParser::getBoolAttribute(currentNode, currentName.c_str(), out.mWrapV);
+            XmlParser::getValueAsBool(currentNode, out.mWrapV);
         } else if (currentName == "mirrorU") {
-            XmlParser::getBoolAttribute(currentNode, currentName.c_str(), out.mMirrorU);
+            XmlParser::getValueAsBool(currentNode, out.mMirrorU);
         } else if (currentName == "mirrorV") {
-            XmlParser::getBoolAttribute(currentNode, currentName.c_str(), out.mMirrorV);
+            XmlParser::getValueAsBool(currentNode, out.mMirrorV);
         } else if (currentName == "repeatU") {
-            XmlParser::getRealAttribute(currentNode, currentName.c_str(), out.mTransform.mScaling.x);
+            XmlParser::getValueAsReal(currentNode, out.mTransform.mScaling.x);
         } else if (currentName == "repeatV") {
-            XmlParser::getRealAttribute(currentNode, currentName.c_str(), out.mTransform.mScaling.y);
+            XmlParser::getValueAsReal(currentNode, out.mTransform.mScaling.y);
         } else if (currentName == "offsetU") {
-            XmlParser::getRealAttribute(currentNode, currentName.c_str(), out.mTransform.mTranslation.x);
+            XmlParser::getValueAsReal(currentNode, out.mTransform.mTranslation.x);
         } else if (currentName == "offsetV") {
-            XmlParser::getRealAttribute(currentNode, currentName.c_str(), out.mTransform.mTranslation.y);
+            XmlParser::getValueAsReal(currentNode, out.mTransform.mTranslation.y);
         } else if (currentName == "rotateUV") {
-            XmlParser::getRealAttribute(currentNode, currentName.c_str(), out.mTransform.mRotation);
+            XmlParser::getValueAsReal(currentNode, out.mTransform.mRotation);
         } else if (currentName == "blend_mode") {
             std::string v;
             XmlParser::getValueAsString(currentNode, v);
@@ -1178,14 +1198,14 @@ void ColladaParser::ReadSamplerProperties(XmlNode &node, Sampler &out) {
         // OKINO extensions
         // -------------------------------------------------------
         else if (currentName == "weighting") {
-            XmlParser::getRealAttribute(currentNode, currentName.c_str(), out.mWeighting);
+            XmlParser::getValueAsReal(currentNode, out.mWeighting);
         } else if (currentName == "mix_with_previous_layer") {
-            XmlParser::getRealAttribute(currentNode, currentName.c_str(), out.mMixWithPrevious);
+            XmlParser::getValueAsReal(currentNode, out.mMixWithPrevious);
         }
         // MAX3D extensions
         // -------------------------------------------------------
         else if (currentName == "amount") {
-            XmlParser::getRealAttribute(currentNode, currentName.c_str(), out.mWeighting);
+            XmlParser::getValueAsReal(currentNode, out.mWeighting);
         }
     }
 }
@@ -1206,18 +1226,19 @@ void ColladaParser::ReadEffectColor(XmlNode &node, aiColor4D &pColor, Sampler &p
             std::string v;
             XmlParser::getValueAsString(currentNode, v);
             const char *content = v.c_str();
+            const char *end = v.c_str() + v.size() + 1; 
 
             content = fast_atoreal_move<ai_real>(content, (ai_real &)pColor.r);
-            SkipSpacesAndLineEnd(&content);
+            SkipSpacesAndLineEnd(&content, end);
 
             content = fast_atoreal_move<ai_real>(content, (ai_real &)pColor.g);
-            SkipSpacesAndLineEnd(&content);
+            SkipSpacesAndLineEnd(&content, end);
 
             content = fast_atoreal_move<ai_real>(content, (ai_real &)pColor.b);
-            SkipSpacesAndLineEnd(&content);
+            SkipSpacesAndLineEnd(&content, end);
 
             content = fast_atoreal_move<ai_real>(content, (ai_real &)pColor.a);
-            SkipSpacesAndLineEnd(&content);
+            SkipSpacesAndLineEnd(&content, end);
         } else if (currentName == "texture") {
             // get name of source texture/sampler
             XmlParser::getStdStrAttribute(currentNode, "texture", pSampler.mName);
@@ -1244,13 +1265,13 @@ void ColladaParser::ReadEffectColor(XmlNode &node, aiColor4D &pColor, Sampler &p
 
 // ------------------------------------------------------------------------------------------------
 // Reads an effect entry containing a float
-void ColladaParser::ReadEffectFloat(XmlNode &node, ai_real &pFloat) {
-    pFloat = 0.f;
+void ColladaParser::ReadEffectFloat(XmlNode &node, ai_real &pReal) {
+    pReal = 0.f;
     XmlNode floatNode = node.child("float");
     if (floatNode.empty()) {
         return;
     }
-    XmlParser::getValueAsFloat(floatNode, pFloat);
+    XmlParser::getValueAsReal(floatNode, pReal);
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -1260,9 +1281,7 @@ void ColladaParser::ReadEffectParam(XmlNode &node, Collada::EffectParam &pParam)
         return;
     }
 
-    XmlNodeIterator xmlIt(node, XmlNodeIterator::PreOrderMode);
-    XmlNode currentNode;
-    while (xmlIt.getNext(currentNode)) {
+    for (XmlNode &currentNode : node.children()) {
         const std::string &currentName = currentNode.name();
         if (currentName == "surface") {
             // image ID given inside <init_from> tags
@@ -1275,22 +1294,24 @@ void ColladaParser::ReadEffectParam(XmlNode &node, Collada::EffectParam &pParam)
             }
         } else if (currentName == "sampler2D" && (FV_1_4_n == mFormat || FV_1_3_n == mFormat)) {
             // surface ID is given inside <source> tags
-            const char *content = currentNode.value();
-            pParam.mType = Param_Sampler;
-            pParam.mReference = content;
+            XmlNode source = currentNode.child("source");
+            if (source) {
+                std::string v;
+                XmlParser::getValueAsString(source, v);
+                pParam.mType = Param_Sampler;
+                pParam.mReference = v.c_str();
+            }
         } else if (currentName == "sampler2D") {
             // surface ID is given inside <instance_image> tags
-            std::string url;
-            XmlParser::getStdStrAttribute(currentNode, "url", url);
-            if (url[0] != '#') {
-                throw DeadlyImportError("Unsupported URL format in instance_image");
-            }
-            pParam.mType = Param_Sampler;
-            pParam.mReference = url.c_str() + 1;
-        } else if (currentName == "source") {
-            const char *source = currentNode.child_value();
-            if (nullptr != source) {
-                pParam.mReference = source;
+            XmlNode instance_image = currentNode.child("instance_image");
+            if (instance_image) {
+                std::string url;
+                XmlParser::getStdStrAttribute(instance_image, "url", url);
+                if (url[0] != '#') {
+                    throw DeadlyImportError("Unsupported URL format in instance_image");
+                }
+                pParam.mType = Param_Sampler;
+                pParam.mReference = url.c_str() + 1;
             }
         }
     }
@@ -1331,6 +1352,7 @@ void ColladaParser::ReadGeometry(XmlNode &node, Collada::Mesh &pMesh) {
     if (node.empty()) {
         return;
     }
+    
     for (XmlNode &currentNode : node.children()) {
         const std::string &currentName = currentNode.name();
         if (currentName == "mesh") {
@@ -1401,6 +1423,7 @@ void ColladaParser::ReadDataArray(XmlNode &node) {
     XmlParser::getValueAsString(node, v);
     v = ai_trim(v);
     const char *content = v.c_str();
+    const char *end = content + v.size();
 
     // read values and store inside an array in the data library
     mDataLibrary[id] = Data();
@@ -1419,11 +1442,13 @@ void ColladaParser::ReadDataArray(XmlNode &node) {
                 }
 
                 s.clear();
-                while (!IsSpaceOrNewLine(*content))
-                    s += *content++;
+                while (!IsSpaceOrNewLine(*content)) {
+                    s += *content;
+                    content++;
+                }
                 data.mStrings.push_back(s);
 
-                SkipSpacesAndLineEnd(&content);
+                SkipSpacesAndLineEnd(&content, end);
             }
         } else {
             data.mValues.reserve(count);
@@ -1438,7 +1463,7 @@ void ColladaParser::ReadDataArray(XmlNode &node) {
                 content = fast_atoreal_move<ai_real>(content, value);
                 data.mValues.push_back(value);
                 // skip whitespace after it
-                SkipSpacesAndLineEnd(&content);
+                SkipSpacesAndLineEnd(&content, end);
             }
         }
     }
@@ -1603,7 +1628,10 @@ void ColladaParser::ReadIndexData(XmlNode &node, Mesh &pMesh) {
                     std::string v;
                     XmlParser::getValueAsString(currentNode, v);
                     const char *content = v.c_str();
+                    const char *end = content + v.size();
+
                     vcount.reserve(numPrimitives);
+                    SkipSpacesAndLineEnd(&content, end);
                     for (unsigned int a = 0; a < numPrimitives; a++) {
                         if (*content == 0) {
                             throw DeadlyImportError("Expected more values while reading <vcount> contents.");
@@ -1611,7 +1639,7 @@ void ColladaParser::ReadIndexData(XmlNode &node, Mesh &pMesh) {
                         // read a number
                         vcount.push_back((size_t)strtoul10(content, &content));
                         // skip whitespace after it
-                        SkipSpacesAndLineEnd(&content);
+                        SkipSpacesAndLineEnd(&content, end);
                     }
                 }
             }
@@ -1720,14 +1748,16 @@ size_t ColladaParser::ReadPrimitives(XmlNode &node, Mesh &pMesh, std::vector<Inp
         std::string v;
         XmlParser::getValueAsString(node, v);
         const char *content = v.c_str();
-        SkipSpacesAndLineEnd(&content);
+        const char *end = content + v.size();
+
+        SkipSpacesAndLineEnd(&content, end);
         while (*content != 0) {
             // read a value.
             // Hack: (thom) Some exporters put negative indices sometimes. We just try to carry on anyways.
             int value = std::max(0, strtol10(content, &content));
             indices.push_back(size_t(value));
             // skip whitespace after it
-            SkipSpacesAndLineEnd(&content);
+            SkipSpacesAndLineEnd(&content, end);
         }
     }
 
@@ -1757,6 +1787,10 @@ size_t ColladaParser::ReadPrimitives(XmlNode &node, Mesh &pMesh, std::vector<Inp
         const Accessor *acc = input.mResolved;
         if (!acc->mData) {
             acc->mData = &ResolveLibraryReference(mDataLibrary, acc->mSource);
+            const size_t dataSize = acc->mOffset + acc->mCount * acc->mStride;
+            if (dataSize > acc->mData->mValues.size()) {
+                throw DeadlyImportError("Not enough data for accessor");
+            }
         }
     }
     // and the same for the per-index channels
@@ -1781,13 +1815,19 @@ size_t ColladaParser::ReadPrimitives(XmlNode &node, Mesh &pMesh, std::vector<Inp
         const Accessor *acc = input.mResolved;
         if (!acc->mData) {
             acc->mData = &ResolveLibraryReference(mDataLibrary, acc->mSource);
+            const size_t dataSize = acc->mOffset + acc->mCount * acc->mStride;
+            if (dataSize > acc->mData->mValues.size()) {
+                throw DeadlyImportError("Not enough data for accessor");
+            }
         }
     }
 
     // For continued primitives, the given count does not come all in one <p>, but only one primitive per <p>
     size_t numPrimitives = pNumPrimitives;
-    if (pPrimType == Prim_TriFans || pPrimType == Prim_Polygon)
+    if (pPrimType == Prim_TriFans || pPrimType == Prim_Polygon) {
         numPrimitives = 1;
+    }
+
     // For continued primitives, the given count is actually the number of <p>'s inside the parent tag
     if (pPrimType == Prim_TriStrips) {
         size_t numberOfVertices = indices.size() / numOffsets;
@@ -1840,7 +1880,6 @@ size_t ColladaParser::ReadPrimitives(XmlNode &node, Mesh &pMesh, std::vector<Inp
         default:
             // LineStrip is not supported due to expected index unmangling
             throw DeadlyImportError("Unsupported primitive type.");
-            break;
         }
 
         // store the face size to later reconstruct the face from
@@ -1853,7 +1892,7 @@ size_t ColladaParser::ReadPrimitives(XmlNode &node, Mesh &pMesh, std::vector<Inp
 
 ///@note This function won't work correctly if both PerIndex and PerVertex channels have same channels.
 ///For example if TEXCOORD present in both <vertices> and <polylist> tags this function will create wrong uv coordinates.
-///It's not clear from COLLADA documentation is this allowed or not. For now only exporter fixed to avoid such behavior
+///It's not clear from COLLADA documentation whether this is allowed or not. For now only exporter fixed to avoid such behavior
 void ColladaParser::CopyVertex(size_t currentVertex, size_t numOffsets, size_t numPoints, size_t perVertexOffset, Mesh &pMesh,
         std::vector<InputChannel> &pPerIndexChannels, size_t currentPrimitive, const std::vector<size_t> &indices) {
     // calculate the base offset of the vertex whose attributes we ant to copy
@@ -1916,7 +1955,7 @@ void ColladaParser::ExtractDataObjectFromChannel(const InputChannel &pInput, siz
     switch (pInput.mType) {
     case IT_Position: // ignore all position streams except 0 - there can be only one position
         if (pInput.mIndex == 0) {
-            pMesh.mPositions.push_back(aiVector3D(obj[0], obj[1], obj[2]));
+            pMesh.mPositions.emplace_back(obj[0], obj[1], obj[2]);
         } else {
             ASSIMP_LOG_ERROR("Collada: just one vertex position stream supported");
         }
@@ -1928,7 +1967,7 @@ void ColladaParser::ExtractDataObjectFromChannel(const InputChannel &pInput, siz
 
         // ignore all normal streams except 0 - there can be only one normal
         if (pInput.mIndex == 0) {
-            pMesh.mNormals.push_back(aiVector3D(obj[0], obj[1], obj[2]));
+            pMesh.mNormals.emplace_back(obj[0], obj[1], obj[2]);
         } else {
             ASSIMP_LOG_ERROR("Collada: just one vertex normal stream supported");
         }
@@ -1940,7 +1979,7 @@ void ColladaParser::ExtractDataObjectFromChannel(const InputChannel &pInput, siz
 
         // ignore all tangent streams except 0 - there can be only one tangent
         if (pInput.mIndex == 0) {
-            pMesh.mTangents.push_back(aiVector3D(obj[0], obj[1], obj[2]));
+            pMesh.mTangents.emplace_back(obj[0], obj[1], obj[2]);
         } else {
             ASSIMP_LOG_ERROR("Collada: just one vertex tangent stream supported");
         }
@@ -1953,7 +1992,7 @@ void ColladaParser::ExtractDataObjectFromChannel(const InputChannel &pInput, siz
 
         // ignore all bitangent streams except 0 - there can be only one bitangent
         if (pInput.mIndex == 0) {
-            pMesh.mBitangents.push_back(aiVector3D(obj[0], obj[1], obj[2]));
+            pMesh.mBitangents.emplace_back(obj[0], obj[1], obj[2]);
         } else {
             ASSIMP_LOG_ERROR("Collada: just one vertex bitangent stream supported");
         }
@@ -1966,7 +2005,7 @@ void ColladaParser::ExtractDataObjectFromChannel(const InputChannel &pInput, siz
                 pMesh.mTexCoords[pInput.mIndex].insert(pMesh.mTexCoords[pInput.mIndex].end(),
                         pMesh.mPositions.size() - pMesh.mTexCoords[pInput.mIndex].size() - 1, aiVector3D(0, 0, 0));
 
-            pMesh.mTexCoords[pInput.mIndex].push_back(aiVector3D(obj[0], obj[1], obj[2]));
+            pMesh.mTexCoords[pInput.mIndex].emplace_back(obj[0], obj[1], obj[2]);
             if (0 != acc.mSubOffset[2] || 0 != acc.mSubOffset[3]) {
                 pMesh.mNumUVComponents[pInput.mIndex] = 3;
             }
@@ -2045,7 +2084,7 @@ void ColladaParser::ReadSceneNode(XmlNode &node, Node *pNode) {
                 XmlParser::getStdStrAttribute(currentNode, "id", child->mID);
             }
             if (XmlParser::hasAttribute(currentNode, "sid")) {
-                XmlParser::getStdStrAttribute(currentNode, "id", child->mSID);
+                XmlParser::getStdStrAttribute(currentNode, "sid", child->mSID);
             }
             if (XmlParser::hasAttribute(currentNode, "name")) {
                 XmlParser::getStdStrAttribute(currentNode, "name", child->mName);
@@ -2100,7 +2139,7 @@ void ColladaParser::ReadSceneNode(XmlNode &node, Node *pNode) {
                 if (s[0] != '#') {
                     ASSIMP_LOG_ERROR("Collada: Unresolved reference format of node");
                 } else {
-                    pNode->mNodeInstances.push_back(NodeInstance());
+                    pNode->mNodeInstances.emplace_back();
                     pNode->mNodeInstances.back().mNode = s.c_str() + 1;
                 }
             }
@@ -2116,7 +2155,7 @@ void ColladaParser::ReadSceneNode(XmlNode &node, Node *pNode) {
                     throw DeadlyImportError("Unknown reference format in <instance_light> element");
                 }
 
-                pNode->mLights.push_back(LightInstance());
+                pNode->mLights.emplace_back();
                 pNode->mLights.back().mLight = url.c_str() + 1;
             }
         } else if (currentName == "instance_camera") {
@@ -2127,7 +2166,7 @@ void ColladaParser::ReadSceneNode(XmlNode &node, Node *pNode) {
                 if (url[0] != '#') {
                     throw DeadlyImportError("Unknown reference format in <instance_camera> element");
                 }
-                pNode->mCameras.push_back(CameraInstance());
+                pNode->mCameras.emplace_back();
                 pNode->mCameras.back().mCamera = url.c_str() + 1;
             }
         }
@@ -2152,15 +2191,15 @@ void ColladaParser::ReadNodeTransformation(XmlNode &node, Node *pNode, Transform
     }
 
     // how many parameters to read per transformation type
-    static const unsigned int sNumParameters[] = { 9, 4, 3, 3, 7, 16 };
+    static constexpr unsigned int sNumParameters[] = { 9, 4, 3, 3, 7, 16 };
     std::string value;
     XmlParser::getValueAsString(node, value);
     const char *content = value.c_str();
-
+    const char *end = value.c_str() + value.size();
     // read as many parameters and store in the transformation
     for (unsigned int a = 0; a < sNumParameters[pType]; a++) {
         // skip whitespace before the number
-        SkipSpacesAndLineEnd(&content);
+        SkipSpacesAndLineEnd(&content, end);
         // read a number
         content = fast_atoreal_move<ai_real>(content, tf.f[a]);
     }
@@ -2204,7 +2243,7 @@ void ColladaParser::ReadMaterialVertexInputBinding(XmlNode &node, Collada::Seman
 
 void ColladaParser::ReadEmbeddedTextures(ZipArchiveIOSystem &zip_archive) {
     // Attempt to load any undefined Collada::Image in ImageLibrary
-    for (auto & it : mImageLibrary) {
+    for (auto &it : mImageLibrary) {
         Collada::Image &image = it.second;
 
         if (image.mImageData.empty()) {
@@ -2239,20 +2278,26 @@ void ColladaParser::ReadNodeGeometry(XmlNode &node, Node *pNode) {
         if (currentName == "bind_material") {
             XmlNode techNode = currentNode.child("technique_common");
             if (techNode) {
-                XmlNode instanceMatNode = techNode.child("instance_material");
-                // read ID of the geometry subgroup and the target material
-                std::string group;
-                XmlParser::getStdStrAttribute(instanceMatNode, "symbol", group);
-                XmlParser::getStdStrAttribute(instanceMatNode, "target", url);
-                const char *urlMat = url.c_str();
-                Collada::SemanticMappingTable s;
-                if (urlMat[0] == '#')
-                    urlMat++;
+                for (XmlNode instanceMatNode = techNode.child("instance_material"); instanceMatNode; instanceMatNode = instanceMatNode.next_sibling())
+                {
+                    const std::string &instance_name = instanceMatNode.name();
+                    if (instance_name == "instance_material")
+                    {
+                        // read ID of the geometry subgroup and the target material
+                        std::string group;
+                        XmlParser::getStdStrAttribute(instanceMatNode, "symbol", group);
+                        XmlParser::getStdStrAttribute(instanceMatNode, "target", url);
+                        const char *urlMat = url.c_str();
+                        Collada::SemanticMappingTable s;
+                        if (urlMat[0] == '#')
+                            urlMat++;
 
-                s.mMatName = urlMat;
-                // store the association
-                instance.mMaterials[group] = s;
-                ReadMaterialVertexInputBinding(instanceMatNode, s);
+                        s.mMatName = urlMat;
+                        ReadMaterialVertexInputBinding(instanceMatNode, s);
+                        // store the association
+                        instance.mMaterials[group] = s;
+                    }
+                }
             }
         }
     }
@@ -2286,7 +2331,7 @@ void ColladaParser::ReadScene(XmlNode &node) {
             // find the referred scene, skip the leading #
             NodeLibrary::const_iterator sit = mNodeLibrary.find(url.c_str() + 1);
             if (sit == mNodeLibrary.end()) {
-                throw DeadlyImportError("Unable to resolve visual_scene reference \"", std::string(url), "\" in <instance_visual_scene> element.");
+                throw DeadlyImportError("Unable to resolve visual_scene reference \"", std::string(std::move(url)), "\" in <instance_visual_scene> element.");
             }
             mRootNode = sit->second;
         }

code/AssetLib/Collada/ColladaParser.h

@@ -2,7 +2,7 @@
  Open Asset Import Library (assimp)
  ----------------------------------------------------------------------
 
- Copyright (c) 2006-2021, assimp team
+ Copyright (c) 2006-2024, assimp team
 
  All rights reserved.
 

code/AssetLib/DXF/DXFHelper.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 
 All rights reserved.
@@ -65,7 +65,6 @@ public:
     LineReader(StreamReaderLE& reader)
     : splitter(reader,false,true)
     , groupcode( 0 )
-    , value()
     , end() {
         // empty
     }
@@ -186,8 +185,7 @@ struct InsertBlock {
     InsertBlock()
     : pos()
     , scale(1.f,1.f,1.f)
-    , angle()
-    , name() {
+    , angle() {
         // empty
     }
 

code/AssetLib/DXF/DXFLoader.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -43,7 +43,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *  @brief Implementation of the DXF importer class
  */
 
-
 #ifndef ASSIMP_BUILD_NO_DXF_IMPORTER
 
 #include "AssetLib/DXF/DXFLoader.h"
@@ -57,6 +56,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/importerdesc.h>
 
 #include <numeric>
+#include <utility>
 
 using namespace Assimp;
 
@@ -67,26 +67,269 @@ static constexpr size_t AI_DXF_BINARY_IDENT_LEN = sizeof AI_DXF_BINARY_IDENT;
 // default vertex color that all uncolored vertices will receive
 static const aiColor4D AI_DXF_DEFAULT_COLOR(aiColor4D(0.6f, 0.6f, 0.6f, 0.6f));
 
-// color indices for DXF - 16 are supported, the table is
-// taken directly from the DXF spec.
-static aiColor4D g_aclrDxfIndexColors[] = {
-    aiColor4D (0.6f, 0.6f, 0.6f, 1.0f),
-    aiColor4D (1.0f, 0.0f, 0.0f, 1.0f), // red
-    aiColor4D (0.0f, 1.0f, 0.0f, 1.0f), // green
-    aiColor4D (0.0f, 0.0f, 1.0f, 1.0f), // blue
-    aiColor4D (0.3f, 1.0f, 0.3f, 1.0f), // light green
-    aiColor4D (0.3f, 0.3f, 1.0f, 1.0f), // light blue
-    aiColor4D (1.0f, 0.3f, 0.3f, 1.0f), // light red
-    aiColor4D (1.0f, 0.0f, 1.0f, 1.0f), // pink
-    aiColor4D (1.0f, 0.6f, 0.0f, 1.0f), // orange
-    aiColor4D (0.6f, 0.3f, 0.0f, 1.0f), // dark orange
-    aiColor4D (1.0f, 1.0f, 0.0f, 1.0f), // yellow
-    aiColor4D (0.3f, 0.3f, 0.3f, 1.0f), // dark gray
-    aiColor4D (0.8f, 0.8f, 0.8f, 1.0f), // light gray
-    aiColor4D (0.0f, 00.f, 0.0f, 1.0f), // black
-    aiColor4D (1.0f, 1.0f, 1.0f, 1.0f), // white
-    aiColor4D (0.6f, 0.0f, 1.0f, 1.0f)  // violet
+// color indices for DXF - 256 are supported, the table is
+// taken directly from the AutoCad Index (ACI) table
+// https://gohtx.com/acadcolors.php
+//STH 2024-0126
+static const aiColor4D g_aclrDxfIndexColors[256] = {
+    aiColor4D (0.0f, 0.0f ,0.0f, 1.0f), //dxf color code 0
+    aiColor4D (1.0f, 0.0f ,0.0f, 1.0f), //dxf color code 1
+    aiColor4D (1.0f, 1.0f ,0.0f, 1.0f), //dxf color code 2
+    aiColor4D (0.0f, 1.0f ,0.0f, 1.0f), //dxf color code 3
+    aiColor4D (0.0f, 1.0f ,1.0f, 1.0f), //dxf color code 4
+    aiColor4D (0.0f, 0.0f ,1.0f, 1.0f), //dxf color code 5
+    aiColor4D (1.0f, 0.0f ,1.0f, 1.0f), //dxf color code 6
+    aiColor4D (1.0f, 1.0f ,1.0f, 1.0f), //dxf color code 7
+    aiColor4D (0.3f, 0.3f ,0.3f, 1.0f), //dxf color code 8
+    aiColor4D (0.5f, 0.5f ,0.5f, 1.0f), //dxf color code 9
+    aiColor4D (1.0f, 0.0f ,0.0f, 1.0f), //dxf color code 10
+    aiColor4D (1.0f, 0.7f ,0.7f, 1.0f), //dxf color code 11
+    aiColor4D (0.7f, 0.0f ,0.0f, 1.0f), //dxf color code 12
+    aiColor4D (0.7f, 0.5f ,0.5f, 1.0f), //dxf color code 13
+    aiColor4D (0.5f, 0.0f ,0.0f, 1.0f), //dxf color code 14
+    aiColor4D (0.5f, 0.3f ,0.3f, 1.0f), //dxf color code 15
+    aiColor4D (0.4f, 0.0f ,0.0f, 1.0f), //dxf color code 16
+    aiColor4D (0.4f, 0.3f ,0.3f, 1.0f), //dxf color code 17
+    aiColor4D (0.3f, 0.0f ,0.0f, 1.0f), //dxf color code 18
+    aiColor4D (0.3f, 0.2f ,0.2f, 1.0f), //dxf color code 19
+    aiColor4D (1.0f, 0.2f ,0.0f, 1.0f), //dxf color code 20
+    aiColor4D (1.0f, 0.7f ,0.7f, 1.0f), //dxf color code 21
+    aiColor4D (0.7f, 0.2f ,0.0f, 1.0f), //dxf color code 22
+    aiColor4D (0.7f, 0.6f ,0.5f, 1.0f), //dxf color code 23
+    aiColor4D (0.5f, 0.1f ,0.0f, 1.0f), //dxf color code 24
+    aiColor4D (0.5f, 0.4f ,0.3f, 1.0f), //dxf color code 25
+    aiColor4D (0.4f, 0.1f ,0.0f, 1.0f), //dxf color code 26
+    aiColor4D (0.4f, 0.3f ,0.3f, 1.0f), //dxf color code 27
+    aiColor4D (0.3f, 0.1f ,0.0f, 1.0f), //dxf color code 28
+    aiColor4D (0.3f, 0.2f ,0.2f, 1.0f), //dxf color code 29
+    aiColor4D (1.0f, 0.5f ,0.0f, 1.0f), //dxf color code 30
+    aiColor4D (1.0f, 0.8f ,0.7f, 1.0f), //dxf color code 31
+    aiColor4D (0.7f, 0.4f ,0.0f, 1.0f), //dxf color code 32
+    aiColor4D (0.7f, 0.6f ,0.5f, 1.0f), //dxf color code 33
+    aiColor4D (0.5f, 0.3f ,0.0f, 1.0f), //dxf color code 34
+    aiColor4D (0.5f, 0.4f ,0.3f, 1.0f), //dxf color code 35
+    aiColor4D (0.4f, 0.2f ,0.0f, 1.0f), //dxf color code 36
+    aiColor4D (0.4f, 0.3f ,0.3f, 1.0f), //dxf color code 37
+    aiColor4D (0.3f, 0.2f ,0.0f, 1.0f), //dxf color code 38
+    aiColor4D (0.3f, 0.3f ,0.2f, 1.0f), //dxf color code 39
+    aiColor4D (1.0f, 0.7f ,0.0f, 1.0f), //dxf color code 40
+    aiColor4D (1.0f, 0.9f ,0.7f, 1.0f), //dxf color code 41
+    aiColor4D (0.7f, 0.6f ,0.0f, 1.0f), //dxf color code 42
+    aiColor4D (0.7f, 0.7f ,0.5f, 1.0f), //dxf color code 43
+    aiColor4D (0.5f, 0.4f ,0.0f, 1.0f), //dxf color code 44
+    aiColor4D (0.5f, 0.5f ,0.3f, 1.0f), //dxf color code 45
+    aiColor4D (0.4f, 0.3f ,0.0f, 1.0f), //dxf color code 46
+    aiColor4D (0.4f, 0.4f ,0.3f, 1.0f), //dxf color code 47
+    aiColor4D (0.3f, 0.2f ,0.0f, 1.0f), //dxf color code 48
+    aiColor4D (0.3f, 0.3f ,0.2f, 1.0f), //dxf color code 49
+    aiColor4D (1.0f, 1.0f ,0.0f, 1.0f), //dxf color code 50
+    aiColor4D (1.0f, 1.0f ,0.7f, 1.0f), //dxf color code 51
+    aiColor4D (0.7f, 0.7f ,0.0f, 1.0f), //dxf color code 52
+    aiColor4D (0.7f, 0.7f ,0.5f, 1.0f), //dxf color code 53
+    aiColor4D (0.5f, 0.5f ,0.0f, 1.0f), //dxf color code 54
+    aiColor4D (0.5f, 0.5f ,0.3f, 1.0f), //dxf color code 55
+    aiColor4D (0.4f, 0.4f ,0.0f, 1.0f), //dxf color code 56
+    aiColor4D (0.4f, 0.4f ,0.3f, 1.0f), //dxf color code 57
+    aiColor4D (0.3f, 0.3f ,0.0f, 1.0f), //dxf color code 58
+    aiColor4D (0.3f, 0.3f ,0.2f, 1.0f), //dxf color code 59
+    aiColor4D (0.7f, 1.0f ,0.0f, 1.0f), //dxf color code 60
+    aiColor4D (0.9f, 1.0f ,0.7f, 1.0f), //dxf color code 61
+    aiColor4D (0.6f, 0.7f ,0.0f, 1.0f), //dxf color code 62
+    aiColor4D (0.7f, 0.7f ,0.5f, 1.0f), //dxf color code 63
+    aiColor4D (0.4f, 0.5f ,0.0f, 1.0f), //dxf color code 64
+    aiColor4D (0.5f, 0.5f ,0.3f, 1.0f), //dxf color code 65
+    aiColor4D (0.3f, 0.4f ,0.0f, 1.0f), //dxf color code 66
+    aiColor4D (0.4f, 0.4f ,0.3f, 1.0f), //dxf color code 67
+    aiColor4D (0.2f, 0.3f ,0.0f, 1.0f), //dxf color code 68
+    aiColor4D (0.3f, 0.3f ,0.2f, 1.0f), //dxf color code 69
+    aiColor4D (0.5f, 1.0f ,0.0f, 1.0f), //dxf color code 70
+    aiColor4D (0.8f, 1.0f ,0.7f, 1.0f), //dxf color code 71
+    aiColor4D (0.4f, 0.7f ,0.0f, 1.0f), //dxf color code 72
+    aiColor4D (0.6f, 0.7f ,0.5f, 1.0f), //dxf color code 73
+    aiColor4D (0.3f, 0.5f ,0.0f, 1.0f), //dxf color code 74
+    aiColor4D (0.4f, 0.5f ,0.3f, 1.0f), //dxf color code 75
+    aiColor4D (0.2f, 0.4f ,0.0f, 1.0f), //dxf color code 76
+    aiColor4D (0.3f, 0.4f ,0.3f, 1.0f), //dxf color code 77
+    aiColor4D (0.2f, 0.3f ,0.0f, 1.0f), //dxf color code 78
+    aiColor4D (0.3f, 0.3f ,0.2f, 1.0f), //dxf color code 79
+    aiColor4D (0.2f, 1.0f ,0.0f, 1.0f), //dxf color code 80
+    aiColor4D (0.7f, 1.0f ,0.7f, 1.0f), //dxf color code 81
+    aiColor4D (0.2f, 0.7f ,0.0f, 1.0f), //dxf color code 82
+    aiColor4D (0.6f, 0.7f ,0.5f, 1.0f), //dxf color code 83
+    aiColor4D (0.1f, 0.5f ,0.0f, 1.0f), //dxf color code 84
+    aiColor4D (0.4f, 0.5f ,0.3f, 1.0f), //dxf color code 85
+    aiColor4D (0.1f, 0.4f ,0.0f, 1.0f), //dxf color code 86
+    aiColor4D (0.3f, 0.4f ,0.3f, 1.0f), //dxf color code 87
+    aiColor4D (0.1f, 0.3f ,0.0f, 1.0f), //dxf color code 88
+    aiColor4D (0.2f, 0.3f ,0.2f, 1.0f), //dxf color code 89
+    aiColor4D (0.0f, 1.0f ,0.0f, 1.0f), //dxf color code 90
+    aiColor4D (0.7f, 1.0f ,0.7f, 1.0f), //dxf color code 91
+    aiColor4D (0.0f, 0.7f ,0.0f, 1.0f), //dxf color code 92
+    aiColor4D (0.5f, 0.7f ,0.5f, 1.0f), //dxf color code 93
+    aiColor4D (0.0f, 0.5f ,0.0f, 1.0f), //dxf color code 94
+    aiColor4D (0.3f, 0.5f ,0.3f, 1.0f), //dxf color code 95
+    aiColor4D (0.0f, 0.4f ,0.0f, 1.0f), //dxf color code 96
+    aiColor4D (0.3f, 0.4f ,0.3f, 1.0f), //dxf color code 97
+    aiColor4D (0.0f, 0.3f ,0.0f, 1.0f), //dxf color code 98
+    aiColor4D (0.2f, 0.3f ,0.2f, 1.0f), //dxf color code 99
+    aiColor4D (0.0f, 1.0f ,0.2f, 1.0f), //dxf color code 100
+    aiColor4D (0.7f, 1.0f ,0.7f, 1.0f), //dxf color code 101
+    aiColor4D (0.0f, 0.7f ,0.2f, 1.0f), //dxf color code 102
+    aiColor4D (0.5f, 0.7f ,0.6f, 1.0f), //dxf color code 103
+    aiColor4D (0.0f, 0.5f ,0.1f, 1.0f), //dxf color code 104
+    aiColor4D (0.3f, 0.5f ,0.4f, 1.0f), //dxf color code 105
+    aiColor4D (0.0f, 0.4f ,0.1f, 1.0f), //dxf color code 106
+    aiColor4D (0.3f, 0.4f ,0.3f, 1.0f), //dxf color code 107
+    aiColor4D (0.0f, 0.3f ,0.1f, 1.0f), //dxf color code 108
+    aiColor4D (0.2f, 0.3f ,0.2f, 1.0f), //dxf color code 109
+    aiColor4D (0.0f, 1.0f ,0.5f, 1.0f), //dxf color code 110
+    aiColor4D (0.7f, 1.0f ,0.8f, 1.0f), //dxf color code 111
+    aiColor4D (0.0f, 0.7f ,0.4f, 1.0f), //dxf color code 112
+    aiColor4D (0.5f, 0.7f ,0.6f, 1.0f), //dxf color code 113
+    aiColor4D (0.0f, 0.5f ,0.3f, 1.0f), //dxf color code 114
+    aiColor4D (0.3f, 0.5f ,0.4f, 1.0f), //dxf color code 115
+    aiColor4D (0.0f, 0.4f ,0.2f, 1.0f), //dxf color code 116
+    aiColor4D (0.3f, 0.4f ,0.3f, 1.0f), //dxf color code 117
+    aiColor4D (0.0f, 0.3f ,0.2f, 1.0f), //dxf color code 118
+    aiColor4D (0.2f, 0.3f ,0.3f, 1.0f), //dxf color code 119
+    aiColor4D (0.0f, 1.0f ,0.7f, 1.0f), //dxf color code 120
+    aiColor4D (0.7f, 1.0f ,0.9f, 1.0f), //dxf color code 121
+    aiColor4D (0.0f, 0.7f ,0.6f, 1.0f), //dxf color code 122
+    aiColor4D (0.5f, 0.7f ,0.7f, 1.0f), //dxf color code 123
+    aiColor4D (0.0f, 0.5f ,0.4f, 1.0f), //dxf color code 124
+    aiColor4D (0.3f, 0.5f ,0.5f, 1.0f), //dxf color code 125
+    aiColor4D (0.0f, 0.4f ,0.3f, 1.0f), //dxf color code 126
+    aiColor4D (0.3f, 0.4f ,0.4f, 1.0f), //dxf color code 127
+    aiColor4D (0.0f, 0.3f ,0.2f, 1.0f), //dxf color code 128
+    aiColor4D (0.2f, 0.3f ,0.3f, 1.0f), //dxf color code 129
+    aiColor4D (0.0f, 1.0f ,1.0f, 1.0f), //dxf color code 130
+    aiColor4D (0.7f, 1.0f ,1.0f, 1.0f), //dxf color code 131
+    aiColor4D (0.0f, 0.7f ,0.7f, 1.0f), //dxf color code 132
+    aiColor4D (0.5f, 0.7f ,0.7f, 1.0f), //dxf color code 133
+    aiColor4D (0.0f, 0.5f ,0.5f, 1.0f), //dxf color code 134
+    aiColor4D (0.3f, 0.5f ,0.5f, 1.0f), //dxf color code 135
+    aiColor4D (0.0f, 0.4f ,0.4f, 1.0f), //dxf color code 136
+    aiColor4D (0.3f, 0.4f ,0.4f, 1.0f), //dxf color code 137
+    aiColor4D (0.0f, 0.3f ,0.3f, 1.0f), //dxf color code 138
+    aiColor4D (0.2f, 0.3f ,0.3f, 1.0f), //dxf color code 139
+    aiColor4D (0.0f, 0.7f ,1.0f, 1.0f), //dxf color code 140
+    aiColor4D (0.7f, 0.9f ,1.0f, 1.0f), //dxf color code 141
+    aiColor4D (0.0f, 0.6f ,0.7f, 1.0f), //dxf color code 142
+    aiColor4D (0.5f, 0.7f ,0.7f, 1.0f), //dxf color code 143
+    aiColor4D (0.0f, 0.4f ,0.5f, 1.0f), //dxf color code 144
+    aiColor4D (0.3f, 0.5f ,0.5f, 1.0f), //dxf color code 145
+    aiColor4D (0.0f, 0.3f ,0.4f, 1.0f), //dxf color code 146
+    aiColor4D (0.3f, 0.4f ,0.4f, 1.0f), //dxf color code 147
+    aiColor4D (0.0f, 0.2f ,0.3f, 1.0f), //dxf color code 148
+    aiColor4D (0.2f, 0.3f ,0.3f, 1.0f), //dxf color code 149
+    aiColor4D (0.0f, 0.5f ,1.0f, 1.0f), //dxf color code 150
+    aiColor4D (0.7f, 0.8f ,1.0f, 1.0f), //dxf color code 151
+    aiColor4D (0.0f, 0.4f ,0.7f, 1.0f), //dxf color code 152
+    aiColor4D (0.5f, 0.6f ,0.7f, 1.0f), //dxf color code 153
+    aiColor4D (0.0f, 0.3f ,0.5f, 1.0f), //dxf color code 154
+    aiColor4D (0.3f, 0.4f ,0.5f, 1.0f), //dxf color code 155
+    aiColor4D (0.0f, 0.2f ,0.4f, 1.0f), //dxf color code 156
+    aiColor4D (0.3f, 0.3f ,0.4f, 1.0f), //dxf color code 157
+    aiColor4D (0.0f, 0.2f ,0.3f, 1.0f), //dxf color code 158
+    aiColor4D (0.2f, 0.3f ,0.3f, 1.0f), //dxf color code 159
+    aiColor4D (0.0f, 0.2f ,1.0f, 1.0f), //dxf color code 160
+    aiColor4D (0.7f, 0.7f ,1.0f, 1.0f), //dxf color code 161
+    aiColor4D (0.0f, 0.2f ,0.7f, 1.0f), //dxf color code 162
+    aiColor4D (0.5f, 0.6f ,0.7f, 1.0f), //dxf color code 163
+    aiColor4D (0.0f, 0.1f ,0.5f, 1.0f), //dxf color code 164
+    aiColor4D (0.3f, 0.4f ,0.5f, 1.0f), //dxf color code 165
+    aiColor4D (0.0f, 0.1f ,0.4f, 1.0f), //dxf color code 166
+    aiColor4D (0.3f, 0.3f ,0.4f, 1.0f), //dxf color code 167
+    aiColor4D (0.0f, 0.1f ,0.3f, 1.0f), //dxf color code 168
+    aiColor4D (0.2f, 0.2f ,0.3f, 1.0f), //dxf color code 169
+    aiColor4D (0.0f, 0.0f ,1.0f, 1.0f), //dxf color code 170
+    aiColor4D (0.7f, 0.7f ,1.0f, 1.0f), //dxf color code 171
+    aiColor4D (0.0f, 0.0f ,0.7f, 1.0f), //dxf color code 172
+    aiColor4D (0.5f, 0.5f ,0.7f, 1.0f), //dxf color code 173
+    aiColor4D (0.0f, 0.0f ,0.5f, 1.0f), //dxf color code 174
+    aiColor4D (0.3f, 0.3f ,0.5f, 1.0f), //dxf color code 175
+    aiColor4D (0.0f, 0.0f ,0.4f, 1.0f), //dxf color code 176
+    aiColor4D (0.3f, 0.3f ,0.4f, 1.0f), //dxf color code 177
+    aiColor4D (0.0f, 0.0f ,0.3f, 1.0f), //dxf color code 178
+    aiColor4D (0.2f, 0.2f ,0.3f, 1.0f), //dxf color code 179
+    aiColor4D (0.2f, 0.0f ,1.0f, 1.0f), //dxf color code 180
+    aiColor4D (0.7f, 0.7f ,1.0f, 1.0f), //dxf color code 181
+    aiColor4D (0.2f, 0.0f ,0.7f, 1.0f), //dxf color code 182
+    aiColor4D (0.6f, 0.5f ,0.7f, 1.0f), //dxf color code 183
+    aiColor4D (0.1f, 0.0f ,0.5f, 1.0f), //dxf color code 184
+    aiColor4D (0.4f, 0.3f ,0.5f, 1.0f), //dxf color code 185
+    aiColor4D (0.1f, 0.0f ,0.4f, 1.0f), //dxf color code 186
+    aiColor4D (0.3f, 0.3f ,0.4f, 1.0f), //dxf color code 187
+    aiColor4D (0.1f, 0.0f ,0.3f, 1.0f), //dxf color code 188
+    aiColor4D (0.2f, 0.2f ,0.3f, 1.0f), //dxf color code 189
+    aiColor4D (0.5f, 0.0f ,1.0f, 1.0f), //dxf color code 190
+    aiColor4D (0.8f, 0.7f ,1.0f, 1.0f), //dxf color code 191
+    aiColor4D (0.4f, 0.0f ,0.7f, 1.0f), //dxf color code 192
+    aiColor4D (0.6f, 0.5f ,0.7f, 1.0f), //dxf color code 193
+    aiColor4D (0.3f, 0.0f ,0.5f, 1.0f), //dxf color code 194
+    aiColor4D (0.4f, 0.3f ,0.5f, 1.0f), //dxf color code 195
+    aiColor4D (0.2f, 0.0f ,0.4f, 1.0f), //dxf color code 196
+    aiColor4D (0.3f, 0.3f ,0.4f, 1.0f), //dxf color code 197
+    aiColor4D (0.2f, 0.0f ,0.3f, 1.0f), //dxf color code 198
+    aiColor4D (0.3f, 0.2f ,0.3f, 1.0f), //dxf color code 199
+    aiColor4D (0.7f, 0.0f ,1.0f, 1.0f), //dxf color code 200
+    aiColor4D (0.9f, 0.7f ,1.0f, 1.0f), //dxf color code 201
+    aiColor4D (0.6f, 0.0f ,0.7f, 1.0f), //dxf color code 202
+    aiColor4D (0.7f, 0.5f ,0.7f, 1.0f), //dxf color code 203
+    aiColor4D (0.4f, 0.0f ,0.5f, 1.0f), //dxf color code 204
+    aiColor4D (0.5f, 0.3f ,0.5f, 1.0f), //dxf color code 205
+    aiColor4D (0.3f, 0.0f ,0.4f, 1.0f), //dxf color code 206
+    aiColor4D (0.4f, 0.3f ,0.4f, 1.0f), //dxf color code 207
+    aiColor4D (0.2f, 0.0f ,0.3f, 1.0f), //dxf color code 208
+    aiColor4D (0.3f, 0.2f ,0.3f, 1.0f), //dxf color code 209
+    aiColor4D (1.0f, 0.0f ,1.0f, 1.0f), //dxf color code 210
+    aiColor4D (1.0f, 0.7f ,1.0f, 1.0f), //dxf color code 211
+    aiColor4D (0.7f, 0.0f ,0.7f, 1.0f), //dxf color code 212
+    aiColor4D (0.7f, 0.5f ,0.7f, 1.0f), //dxf color code 213
+    aiColor4D (0.5f, 0.0f ,0.5f, 1.0f), //dxf color code 214
+    aiColor4D (0.5f, 0.3f ,0.5f, 1.0f), //dxf color code 215
+    aiColor4D (0.4f, 0.0f ,0.4f, 1.0f), //dxf color code 216
+    aiColor4D (0.4f, 0.3f ,0.4f, 1.0f), //dxf color code 217
+    aiColor4D (0.3f, 0.0f ,0.3f, 1.0f), //dxf color code 218
+    aiColor4D (0.3f, 0.2f ,0.3f, 1.0f), //dxf color code 219
+    aiColor4D (1.0f, 0.0f ,0.7f, 1.0f), //dxf color code 220
+    aiColor4D (1.0f, 0.7f ,0.9f, 1.0f), //dxf color code 221
+    aiColor4D (0.7f, 0.0f ,0.6f, 1.0f), //dxf color code 222
+    aiColor4D (0.7f, 0.5f ,0.7f, 1.0f), //dxf color code 223
+    aiColor4D (0.5f, 0.0f ,0.4f, 1.0f), //dxf color code 224
+    aiColor4D (0.5f, 0.3f ,0.5f, 1.0f), //dxf color code 225
+    aiColor4D (0.4f, 0.0f ,0.3f, 1.0f), //dxf color code 226
+    aiColor4D (0.4f, 0.3f ,0.4f, 1.0f), //dxf color code 227
+    aiColor4D (0.3f, 0.0f ,0.2f, 1.0f), //dxf color code 228
+    aiColor4D (0.3f, 0.2f ,0.3f, 1.0f), //dxf color code 229
+    aiColor4D (1.0f, 0.0f ,0.5f, 1.0f), //dxf color code 230
+    aiColor4D (1.0f, 0.7f ,0.8f, 1.0f), //dxf color code 231
+    aiColor4D (0.7f, 0.0f ,0.4f, 1.0f), //dxf color code 232
+    aiColor4D (0.7f, 0.5f ,0.6f, 1.0f), //dxf color code 233
+    aiColor4D (0.5f, 0.0f ,0.3f, 1.0f), //dxf color code 234
+    aiColor4D (0.5f, 0.3f ,0.4f, 1.0f), //dxf color code 235
+    aiColor4D (0.4f, 0.0f ,0.2f, 1.0f), //dxf color code 236
+    aiColor4D (0.4f, 0.3f ,0.3f, 1.0f), //dxf color code 237
+    aiColor4D (0.3f, 0.0f ,0.2f, 1.0f), //dxf color code 238
+    aiColor4D (0.3f, 0.2f ,0.3f, 1.0f), //dxf color code 239
+    aiColor4D (1.0f, 0.0f ,0.2f, 1.0f), //dxf color code 240
+    aiColor4D (1.0f, 0.7f ,0.7f, 1.0f), //dxf color code 241
+    aiColor4D (0.7f, 0.0f ,0.2f, 1.0f), //dxf color code 242
+    aiColor4D (0.7f, 0.5f ,0.6f, 1.0f), //dxf color code 243
+    aiColor4D (0.5f, 0.0f ,0.1f, 1.0f), //dxf color code 244
+    aiColor4D (0.5f, 0.3f ,0.4f, 1.0f), //dxf color code 245
+    aiColor4D (0.4f, 0.0f ,0.1f, 1.0f), //dxf color code 246
+    aiColor4D (0.4f, 0.3f ,0.3f, 1.0f), //dxf color code 247
+    aiColor4D (0.3f, 0.0f ,0.1f, 1.0f), //dxf color code 248
+    aiColor4D (0.3f, 0.2f ,0.2f, 1.0f), //dxf color code 249
+    aiColor4D (0.2f, 0.2f ,0.2f, 1.0f), //dxf color code 250
+    aiColor4D (0.3f, 0.3f ,0.3f, 1.0f), //dxf color code 251
+    aiColor4D (0.4f, 0.4f ,0.4f, 1.0f), //dxf color code 252
+    aiColor4D (0.5f, 0.5f ,0.5f, 1.0f), //dxf color code 253
+    aiColor4D (0.7f, 0.7f ,0.7f, 1.0f), //dxf color code 254
+    aiColor4D (1.0f, 1.0f ,1.0f, 1.0f) //dxf color code 255
 };
+
 #define AI_DXF_NUM_INDEX_COLORS (sizeof(g_aclrDxfIndexColors)/sizeof(g_aclrDxfIndexColors[0]))
 #define AI_DXF_ENTITIES_MAGIC_BLOCK "$ASSIMP_ENTITIES_MAGIC"
 
@@ -95,7 +338,7 @@ static const int GroupCode_XComp = 10;
 static const int GroupCode_YComp = 20;
 static const int GroupCode_ZComp = 30;
 
-static const aiImporterDesc desc = {
+static constexpr aiImporterDesc desc = {
     "Drawing Interchange Format (DXF) Importer",
     "",
     "",
@@ -108,33 +351,11 @@ static const aiImporterDesc desc = {
     "dxf"
 };
 
-// ------------------------------------------------------------------------------------------------
-// Constructor to be privately used by Importer
-DXFImporter::DXFImporter()
-: BaseImporter() {
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-// Destructor, private as well
-DXFImporter::~DXFImporter() {
-    // empty
-}
-
 // ------------------------------------------------------------------------------------------------
 // Returns whether the class can handle the format of the given file.
-bool DXFImporter::CanRead( const std::string& filename, IOSystem* pIOHandler, bool checkSig ) const {
-    const std::string& extension = GetExtension( filename );
-    if ( extension == desc.mFileExtensions ) {
-        return true;
-    }
-
-    if ( extension.empty() || checkSig ) {
-        static const char * const pTokens[] = { "SECTION", "HEADER", "ENDSEC", "BLOCKS" };
-        return SearchFileHeaderForToken(pIOHandler, filename, pTokens, 4, 32 );
-    }
-
-    return false;
+bool DXFImporter::CanRead( const std::string& filename, IOSystem* pIOHandler, bool /*checkSig*/ ) const {
+    static const char *tokens[] = { "SECTION", "HEADER", "ENDSEC", "BLOCKS" };
+    return SearchFileHeaderForToken(pIOHandler, filename, tokens, AI_COUNT_OF(tokens), 32);
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -149,7 +370,7 @@ void DXFImporter::InternReadFile( const std::string& filename, aiScene* pScene,
     std::shared_ptr<IOStream> file = std::shared_ptr<IOStream>( pIOHandler->Open( filename) );
 
     // Check whether we can read the file
-    if( file.get() == nullptr ) {
+    if (file == nullptr) {
         throw DeadlyImportError( "Failed to open DXF file ", filename, "");
     }
 
@@ -164,7 +385,7 @@ void DXFImporter::InternReadFile( const std::string& filename, aiScene* pScene,
     // DXF files can grow very large, so read them via the StreamReader,
     // which will choose a suitable strategy.
     file->Seek(0,aiOrigin_SET);
-    StreamReaderLE stream( file );
+    StreamReaderLE stream( std::move(file) );
 
     DXF::LineReader reader (stream);
     DXF::FileData output;
@@ -242,7 +463,7 @@ void DXFImporter::ConvertMeshes(aiScene* pScene, DXF::FileData& output) {
         ASSIMP_LOG_VERBOSE_DEBUG("DXF: Unexpanded polycount is ", icount, ", vertex count is ", vcount);
     }
 
-    if (! output.blocks.size()  ) {
+    if (output.blocks.empty()) {
         throw DeadlyImportError("DXF: no data blocks loaded");
     }
 
@@ -377,7 +598,14 @@ void DXFImporter::ExpandBlockReferences(DXF::Block& bl,const DXF::BlockMap& bloc
         // XXX this would be the place to implement recursive expansion if needed.
         const DXF::Block& bl_src = *(*it).second;
 
-        for (std::shared_ptr<const DXF::PolyLine> pl_in : bl_src.lines) {
+        const size_t size = bl_src.lines.size(); // the size may increase in the loop
+        for (size_t i = 0; i < size; ++i) {
+            std::shared_ptr<const DXF::PolyLine> pl_in = bl_src.lines[i];
+            if (!pl_in) {
+                ASSIMP_LOG_ERROR("DXF: PolyLine instance is nullptr, skipping.");
+                continue;
+            }
+
             std::shared_ptr<DXF::PolyLine> pl_out = std::shared_ptr<DXF::PolyLine>(new DXF::PolyLine(*pl_in));
 
             if (bl_src.base.Length() || insert.scale.x!=1.f || insert.scale.y!=1.f || insert.scale.z!=1.f || insert.angle || insert.pos.Length()) {
@@ -385,8 +613,12 @@ void DXFImporter::ExpandBlockReferences(DXF::Block& bl,const DXF::BlockMap& bloc
                 // XXX order
                 aiMatrix4x4 trafo, tmp;
                 aiMatrix4x4::Translation(-bl_src.base,trafo);
-                trafo *= aiMatrix4x4::Scaling(insert.scale,tmp);
+                //Need to translate position before scaling the insert
+                //otherwise the position ends up being the position*scaling
+                //STH 2024.01.17
                 trafo *= aiMatrix4x4::Translation(insert.pos,tmp);
+                trafo *= aiMatrix4x4::Scaling(insert.scale,tmp);
+                //trafo *= aiMatrix4x4::Translation(insert.pos,tmp);
 
                 // XXX rotation currently ignored - I didn't find an appropriate sample model.
                 if (insert.angle != 0.f) {
@@ -477,7 +709,7 @@ void DXFImporter::ParseBlocks(DXF::LineReader& reader, DXF::FileData& output) {
 // ------------------------------------------------------------------------------------------------
 void DXFImporter::ParseBlock(DXF::LineReader& reader, DXF::FileData& output) {
     // push a new block onto the stack.
-    output.blocks.push_back( DXF::Block() );
+    output.blocks.emplace_back();
     DXF::Block& block = output.blocks.back();
 
     while( !reader.End() && !reader.Is(0,"ENDBLK")) {
@@ -522,7 +754,7 @@ void DXFImporter::ParseBlock(DXF::LineReader& reader, DXF::FileData& output) {
 // ------------------------------------------------------------------------------------------------
 void DXFImporter::ParseEntities(DXF::LineReader& reader, DXF::FileData& output) {
     // Push a new block onto the stack.
-    output.blocks.push_back( DXF::Block() );
+    output.blocks.emplace_back();
     DXF::Block& block = output.blocks.back();
 
     block.name = AI_DXF_ENTITIES_MAGIC_BLOCK;
@@ -552,7 +784,7 @@ void DXFImporter::ParseEntities(DXF::LineReader& reader, DXF::FileData& output)
 }
 
 void DXFImporter::ParseInsertion(DXF::LineReader& reader, DXF::FileData& output) {
-    output.blocks.back().insertions.push_back( DXF::InsertBlock() );
+    output.blocks.back().insertions.emplace_back();
     DXF::InsertBlock& bl = output.blocks.back().insertions.back();
 
     while( !reader.End() && !reader.Is(0)) {
@@ -593,10 +825,11 @@ void DXFImporter::ParseInsertion(DXF::LineReader& reader, DXF::FileData& output)
     }
 }
 
-#define DXF_POLYLINE_FLAG_CLOSED        0x1
-#define DXF_POLYLINE_FLAG_3D_POLYLINE   0x8
-#define DXF_POLYLINE_FLAG_3D_POLYMESH   0x10
-#define DXF_POLYLINE_FLAG_POLYFACEMESH  0x40
+static constexpr unsigned int DXF_POLYLINE_FLAG_CLOSED = 0x1;
+// Currently unused
+//static constexpr unsigned int DXF_POLYLINE_FLAG_3D_POLYLINE = 0x8;
+//static constexpr unsigned int DXF_POLYLINE_FLAG_3D_POLYMESH = 0x10;
+static constexpr unsigned int DXF_POLYLINE_FLAG_POLYFACEMESH = 0x40;
 
 // ------------------------------------------------------------------------------------------------
 void DXFImporter::ParsePolyLine(DXF::LineReader& reader, DXF::FileData& output) {
@@ -645,12 +878,6 @@ void DXFImporter::ParsePolyLine(DXF::LineReader& reader, DXF::FileData& output)
         reader++;
     }
 
-    //if (!(line.flags & DXF_POLYLINE_FLAG_POLYFACEMESH))   {
-    //  DefaultLogger::get()->warn((Formatter::format("DXF: polyline not currently supported: "),line.flags));
-    //  output.blocks.back().lines.pop_back();
-    //  return;
-    //}
-
     if (vguess && line.positions.size() != vguess) {
         ASSIMP_LOG_WARN("DXF: unexpected vertex count in polymesh: ",
             line.positions.size(),", expected ", vguess );
@@ -740,12 +967,18 @@ void DXFImporter::ParsePolyLineVertex(DXF::LineReader& reader, DXF::PolyLine& li
         case 71:
         case 72:
         case 73:
-        case 74:
-            if (cnti == 4) {
-                ASSIMP_LOG_WARN("DXF: more than 4 indices per face not supported; ignoring");
-                break;
+        case 74: {
+                if (cnti == 4) {
+                    ASSIMP_LOG_WARN("DXF: more than 4 indices per face not supported; ignoring");
+                    break;
+                }
+                const int index = reader.ValueAsSignedInt();
+                if (index >= 0) {
+                    indices[cnti++] = static_cast<unsigned int>(index);
+                } else {
+                    indices[cnti++] = static_cast<unsigned int>(-index);
+                }
             }
-            indices[cnti++] = reader.ValueAsUnsignedInt();
             break;
 
         // color
@@ -783,8 +1016,7 @@ void DXFImporter::ParsePolyLineVertex(DXF::LineReader& reader, DXF::PolyLine& li
 }
 
 // ------------------------------------------------------------------------------------------------
-void DXFImporter::Parse3DFace(DXF::LineReader& reader, DXF::FileData& output)
-{
+void DXFImporter::Parse3DFace(DXF::LineReader& reader, DXF::FileData& output) {
     // (note) this is also used for for parsing line entities, so we
     // must handle the vertex_count == 2 case as well.
 
@@ -801,8 +1033,7 @@ void DXFImporter::Parse3DFace(DXF::LineReader& reader, DXF::FileData& output)
         if (reader.GroupCode() == 0) {
             break;
         }
-        switch (reader.GroupCode())
-        {
+        switch (reader.GroupCode()) {
 
         // 8 specifies the layer
         case 8:

code/AssetLib/DXF/DXFLoader.h

@@ -2,7 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2021, assimp team
+Copyright (c) 2006-2024, assimp team
 
 All rights reserved.
 
@@ -68,8 +68,8 @@ namespace DXF {
  */
 class DXFImporter : public BaseImporter {
 public:
-    DXFImporter();
-    ~DXFImporter() override;
+    DXFImporter() = default;
+    ~DXFImporter() override = default;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.