fix no_valid_proc (#5774)

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

.github/workflows/ccpp.yml

@@ -7,10 +7,10 @@ on:
     branches: [ master ]
 
 permissions:
-  contents: read # to fetch code (actions/checkout)
+  contents: write # to fetch code (actions/checkout),and release
 
 jobs:
-  job:
+  build:
     name: ${{ matrix.name }}-build-and-test
     runs-on: ${{ matrix.os }}
     strategy:
@@ -37,6 +37,9 @@ jobs:
             cc: gcc
 
     steps:
+    - name: ccache
+      uses: hendrikmuhs/ccache-action@v1.2
+      
     - uses: actions/checkout@v4
       with:
           submodules: true
@@ -70,12 +73,12 @@ jobs:
     - 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 -DASSIMP_BUILD_ZLIB=1"
+      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 "::set-output name=args::-DBUILD_SHARED_LIBS=OFF -DASSIMP_HUNTER_ENABLED=ON -DCMAKE_TOOLCHAIN_FILE=${{ github.workspace }}/cmake/polly/${{ matrix.toolchain }}.cmake"
+      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
@@ -92,7 +95,7 @@ jobs:
     - 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"
+      run: echo "args=--gtest_filter=-utOpenGEXImportExport.Importissue1340_EmptyCameraObject:utColladaZaeImportExport.importBlenFromFileTest" >> $GITHUB_OUTPUT
 
     - name: test
       run: cd build/bin && ./unit ${{ steps.hunter_extra_test_args.outputs.args }}
@@ -101,5 +104,89 @@ jobs:
     - uses: actions/upload-artifact@v4
       if: matrix.name == 'windows-msvc'
       with:
-        name: 'assimp-bins-${{ matrix.name }}-${{ github.sha }}'
-        path: build/bin
+        name: 'assimp-bins-${{ 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
+            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
+          - name: ubuntu-gcc-hunter
+            os: ubuntu-latest
+            toolchain: ninja-gcc-cxx17-fpic
+          - name: macos-clang-hunter
+            os: macos-latest
+            toolchain: ninja-clang-cxx17-fpic
+          - name: windows-msvc-hunter
+            os: windows-latest
+            toolchain: ninja-vs-win64-cxx17
+            
+    needs: [create-release]
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/tags/')
+    steps:
+      - 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
+ 

.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

CMakeLists.txt

@@ -40,6 +40,22 @@ SET(CMAKE_POLICY_DEFAULT_CMP0092 NEW)
 
 CMAKE_MINIMUM_REQUIRED( VERSION 3.22 )
 
+# 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)
@@ -55,7 +71,7 @@ IF(ASSIMP_HUNTER_ENABLED)
   add_definitions(-DASSIMP_USE_HUNTER)
 ENDIF()
 
-PROJECT(Assimp VERSION 5.4.1)
+PROJECT(Assimp VERSION 5.4.3)
 
 # All supported options ###############################################
 
@@ -147,7 +163,7 @@ IF (WIN32)
 
   IF(MSVC)
     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 has been deprecated since at least MSVC2015 (possibly earlier)
@@ -292,8 +308,15 @@ ELSEIF(MSVC)
   # 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}")
-  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_POSITION_INDEPENDENT_CODE ON)
@@ -636,7 +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)

Dockerfile

@@ -1,6 +1,6 @@
 FROM ubuntu:22.04
 
-RUN apt-get update && apt-get install -y ninja-build \
+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 

Readme.md

@@ -26,12 +26,11 @@ 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)
 
-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>
-
 #### Supported file formats ####
 See [the complete list of supported formats](https://github.com/assimp/assimp/blob/master/doc/Fileformats.md).
 

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

@@ -643,11 +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;
@@ -709,7 +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

code/AssetLib/3DS/3DSExporter.cpp

@@ -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>

code/AssetLib/3DS/3DSHelper.h

@@ -365,14 +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),
@@ -385,7 +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),

code/AssetLib/3MF/D3MFExporter.cpp

@@ -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/XmlSerializer.cpp

@@ -57,8 +57,8 @@ 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;
     }
@@ -157,8 +157,8 @@ aiMatrix4x4 parseTransformMatrix(const 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;
     }
 
@@ -178,7 +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;
     }

code/AssetLib/AC/ACLoader.cpp

@@ -193,7 +193,7 @@ bool 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");
@@ -696,18 +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;
         }
     }

code/AssetLib/AMF/AMFImporter.cpp

@@ -178,28 +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 == '/'));
 }
@@ -213,7 +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);
@@ -403,17 +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();

code/AssetLib/AMF/AMFImporter.hpp

@@ -168,7 +168,6 @@ public:
     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);
-    void ParseHelper_FixTruncatedFloatString(const char *pInStr, std::string &pOutString);
     AMFImporter(const AMFImporter &pScene) = delete;
     AMFImporter &operator=(const AMFImporter &pScene) = delete;
 

code/AssetLib/AMF/AMFImporter_Geometry.cpp

@@ -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

@@ -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

@@ -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:
@@ -106,7 +105,6 @@ protected:
 	}
 }; // class IAMFImporter_NodeElement
 
-/// \struct CAMFImporter_NodeElement_Constellation
 /// A collection of objects or constellations with specific relative locations.
 struct AMFConstellation : public AMFNodeElementBase {
 	/// Constructor.
@@ -116,7 +114,6 @@ struct AMFConstellation : public AMFNodeElementBase {
 
 }; // struct CAMFImporter_NodeElement_Constellation
 
-/// \struct CAMFImporter_NodeElement_Instance
 /// Part of constellation.
 struct AMFInstance : public AMFNodeElementBase {
 
@@ -135,7 +132,6 @@ struct AMFInstance : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Instance, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Metadata
 /// Structure that define metadata node.
 struct AMFMetadata : public AMFNodeElementBase {
 
@@ -148,7 +144,6 @@ struct AMFMetadata : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Metadata, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Root
 /// Structure that define root node.
 struct AMFRoot : public AMFNodeElementBase {
 
@@ -161,7 +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.
@@ -177,7 +171,6 @@ struct AMFColor : public AMFNodeElementBase {
 	}
 };
 
-/// \struct CAMFImporter_NodeElement_Material
 /// Structure that define material node.
 struct AMFMaterial : public AMFNodeElementBase {
 
@@ -187,7 +180,6 @@ struct AMFMaterial : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Material, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Object
 /// Structure that define object node.
 struct AMFObject : public AMFNodeElementBase {
 
@@ -206,7 +198,6 @@ struct AMFMesh : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Mesh, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Vertex
 /// Structure that define vertex node.
 struct AMFVertex : public AMFNodeElementBase {
 	/// Constructor.
@@ -215,7 +206,6 @@ struct AMFVertex : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Vertex, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Edge
 /// Structure that define edge node.
 struct AMFEdge : public AMFNodeElementBase {
 	/// Constructor.
@@ -224,7 +214,6 @@ struct AMFEdge : public AMFNodeElementBase {
 			AMFNodeElementBase(ENET_Edge, pParent) {}
 };
 
-/// \struct CAMFImporter_NodeElement_Vertices
 /// Structure that define vertices node.
 struct AMFVertices : public AMFNodeElementBase {
 	/// Constructor.
@@ -233,7 +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.
@@ -245,7 +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.
@@ -256,7 +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.
@@ -273,7 +259,6 @@ struct AMFTexMap : public AMFNodeElementBase {
 	}
 };
 
-/// \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

@@ -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';
@@ -867,7 +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

@@ -124,7 +124,7 @@ void ASEImporter::InternReadFile(const std::string &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;
 
@@ -146,7 +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();
 
@@ -446,10 +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);
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -506,10 +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
@@ -519,16 +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"));
@@ -541,7 +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
@@ -619,7 +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)

code/AssetLib/ASE/ASELoader.h

@@ -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

@@ -391,11 +391,11 @@ public:
     // -------------------------------------------------------------------
     //! 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
@@ -553,13 +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
@@ -577,7 +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
@@ -617,11 +620,8 @@ private:
     bool ParseString(std::string &out, const char *szName);
 
 public:
-    //! Pointer to current data
-    const char *filePtr;
-
-    /// The end pointer of the file data
-    const char *mEnd;
+    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/Blender/BlenderLoader.cpp

@@ -359,7 +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();
@@ -433,7 +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]++));

code/AssetLib/COB/COBLoader.cpp

@@ -372,9 +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;

code/AssetLib/Collada/ColladaLoader.cpp

@@ -625,16 +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];
         }
     }
 

code/AssetLib/Collada/ColladaParser.cpp

@@ -968,34 +968,34 @@ void ColladaParser::ReadLight(XmlNode &node, Collada::Light &pLight) {
             content = fast_atoreal_move<ai_real>(content, (ai_real &)pLight.mColor.b);
             SkipSpacesAndLineEnd(&content, end);
         } else if (currentName == "constant_attenuation") {
-            XmlParser::getValueAsFloat(currentNode, pLight.mAttConstant);
+            XmlParser::getValueAsReal(currentNode, pLight.mAttConstant);
         } else if (currentName == "linear_attenuation") {
-            XmlParser::getValueAsFloat(currentNode, pLight.mAttLinear);
+            XmlParser::getValueAsReal(currentNode, pLight.mAttLinear);
         } else if (currentName == "quadratic_attenuation") {
-            XmlParser::getValueAsFloat(currentNode, pLight.mAttQuadratic);
+            XmlParser::getValueAsReal(currentNode, pLight.mAttQuadratic);
         } else if (currentName == "falloff_angle") {
-            XmlParser::getValueAsFloat(currentNode, pLight.mFalloffAngle);
+            XmlParser::getValueAsReal(currentNode, pLight.mFalloffAngle);
         } else if (currentName == "falloff_exponent") {
-            XmlParser::getValueAsFloat(currentNode, pLight.mFalloffExponent);
+            XmlParser::getValueAsReal(currentNode, pLight.mFalloffExponent);
         }
         // FCOLLADA extensions
         // -------------------------------------------------------
         else if (currentName == "outer_cone") {
-            XmlParser::getValueAsFloat(currentNode, pLight.mOuterAngle);
+            XmlParser::getValueAsReal(currentNode, pLight.mOuterAngle);
         } else if (currentName == "penumbra_angle") { // this one is deprecated, now calculated using outer_cone
-            XmlParser::getValueAsFloat(currentNode, pLight.mPenumbraAngle);
+            XmlParser::getValueAsReal(currentNode, pLight.mPenumbraAngle);
         } else if (currentName == "intensity") {
-            XmlParser::getValueAsFloat(currentNode, pLight.mIntensity);
+            XmlParser::getValueAsReal(currentNode, pLight.mIntensity);
         }
         else if (currentName == "falloff") {
-            XmlParser::getValueAsFloat(currentNode, pLight.mOuterAngle);
+            XmlParser::getValueAsReal(currentNode, pLight.mOuterAngle);
         } else if (currentName == "hotspot_beam") {
-            XmlParser::getValueAsFloat(currentNode, pLight.mFalloffAngle);
+            XmlParser::getValueAsReal(currentNode, pLight.mFalloffAngle);
         }
         // OpenCOLLADA extensions
         // -------------------------------------------------------
         else if (currentName == "decay_falloff") {
-            XmlParser::getValueAsFloat(currentNode, pLight.mOuterAngle);
+            XmlParser::getValueAsReal(currentNode, pLight.mOuterAngle);
         }
     }
 }
@@ -1010,15 +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);
         }
     }
 }
@@ -1170,15 +1170,15 @@ void ColladaParser::ReadSamplerProperties(XmlNode &node, Sampler &out) {
         } else if (currentName == "mirrorV") {
             XmlParser::getValueAsBool(currentNode, out.mMirrorV);
         } else if (currentName == "repeatU") {
-            XmlParser::getValueAsFloat(currentNode, out.mTransform.mScaling.x);
+            XmlParser::getValueAsReal(currentNode, out.mTransform.mScaling.x);
         } else if (currentName == "repeatV") {
-            XmlParser::getValueAsFloat(currentNode, out.mTransform.mScaling.y);
+            XmlParser::getValueAsReal(currentNode, out.mTransform.mScaling.y);
         } else if (currentName == "offsetU") {
-            XmlParser::getValueAsFloat(currentNode, out.mTransform.mTranslation.x);
+            XmlParser::getValueAsReal(currentNode, out.mTransform.mTranslation.x);
         } else if (currentName == "offsetV") {
-            XmlParser::getValueAsFloat(currentNode, out.mTransform.mTranslation.y);
+            XmlParser::getValueAsReal(currentNode, out.mTransform.mTranslation.y);
         } else if (currentName == "rotateUV") {
-            XmlParser::getValueAsFloat(currentNode, out.mTransform.mRotation);
+            XmlParser::getValueAsReal(currentNode, out.mTransform.mRotation);
         } else if (currentName == "blend_mode") {
             std::string v;
             XmlParser::getValueAsString(currentNode, v);
@@ -1198,14 +1198,14 @@ void ColladaParser::ReadSamplerProperties(XmlNode &node, Sampler &out) {
         // OKINO extensions
         // -------------------------------------------------------
         else if (currentName == "weighting") {
-            XmlParser::getValueAsFloat(currentNode, out.mWeighting);
+            XmlParser::getValueAsReal(currentNode, out.mWeighting);
         } else if (currentName == "mix_with_previous_layer") {
-            XmlParser::getValueAsFloat(currentNode, out.mMixWithPrevious);
+            XmlParser::getValueAsReal(currentNode, out.mMixWithPrevious);
         }
         // MAX3D extensions
         // -------------------------------------------------------
         else if (currentName == "amount") {
-            XmlParser::getValueAsFloat(currentNode, out.mWeighting);
+            XmlParser::getValueAsReal(currentNode, out.mWeighting);
         }
     }
 }
@@ -1265,13 +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);
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -2293,9 +2293,9 @@ void ColladaParser::ReadNodeGeometry(XmlNode &node, Node *pNode) {
                             urlMat++;
 
                         s.mMatName = urlMat;
+                        ReadMaterialVertexInputBinding(instanceMatNode, s);
                         // store the association
                         instance.mMaterials[group] = s;
-                        ReadMaterialVertexInputBinding(instanceMatNode, s);
                     }
                 }
             }

code/AssetLib/FBX/FBXConverter.cpp

@@ -181,7 +181,9 @@ FBXConverter::FBXConverter(aiScene *out, const Document &doc, bool removeEmptyBo
     if (out->mNumMeshes == 0) {
         out->mFlags |= AI_SCENE_FLAGS_INCOMPLETE;
     } else {
-        correctRootTransform(mSceneOut);
+        // Apply the FBX axis metadata unless requested not to
+        if (!doc.Settings().ignoreUpDirection)
+            correctRootTransform(mSceneOut);
     }
 }
 
@@ -310,6 +312,8 @@ void FBXConverter::ConvertNodes(uint64_t id, aiNode *parent, aiNode *root_node)
 
                 child->mParent = last_parent;
                 last_parent = child.mNode;
+
+                new_abs_transform *= child->mTransformation;
             }
 
             // attach geometry
@@ -332,6 +336,8 @@ void FBXConverter::ConvertNodes(uint64_t id, aiNode *parent, aiNode *root_node)
 
                     postnode->mParent = last_parent;
                     last_parent = postnode.mNode;
+
+                    new_abs_transform *= postnode->mTransformation;
                 }
             } else {
                 // free the nodes we allocated as we don't need them
@@ -357,12 +363,12 @@ void FBXConverter::ConvertNodes(uint64_t id, aiNode *parent, aiNode *root_node)
     if (nodes.empty()) {
         parent->mNumChildren = 0;
         parent->mChildren = nullptr;
-    }
-
-    parent->mChildren = new aiNode *[nodes.size()]();
-    parent->mNumChildren = static_cast<unsigned int>(nodes.size());
-    for (unsigned int i = 0; i < nodes.size(); ++i) {
-        parent->mChildren[i] = nodes[i].mOwnership.release();
+    } else {
+        parent->mChildren = new aiNode *[nodes.size()]();
+        parent->mNumChildren = static_cast<unsigned int>(nodes.size());
+        for (unsigned int i = 0; i < nodes.size(); ++i) {
+            parent->mChildren[i] = nodes[i].mOwnership.release();
+        }
     }
 }
 
@@ -1860,7 +1866,7 @@ aiString FBXConverter::GetTexturePath(const Texture *tex) {
                 // We need to load all textures before referencing them, as FBX file format order may reference a texture before loading it
                 // This may occur on this case too, it has to be studied
                 path.data[0] = '*';
-                path.length = 1 + ASSIMP_itoa10(path.data + 1, MAXLEN - 1, index);
+                path.length = 1 + ASSIMP_itoa10(path.data + 1, AI_MAXLEN - 1, index);
             }
         }
     }
@@ -2128,6 +2134,10 @@ void FBXConverter::SetTextureProperties(aiMaterial *out_mat, const TextureMap &_
     TrySetTextureProperties(out_mat, _textures, "Maya|emissionColor", aiTextureType_EMISSION_COLOR, mesh);
     TrySetTextureProperties(out_mat, _textures, "Maya|metalness", aiTextureType_METALNESS, mesh);
     TrySetTextureProperties(out_mat, _textures, "Maya|diffuseRoughness", aiTextureType_DIFFUSE_ROUGHNESS, mesh);
+    TrySetTextureProperties(out_mat, _textures, "Maya|base", aiTextureType_MAYA_BASE, mesh);
+    TrySetTextureProperties(out_mat, _textures, "Maya|specular", aiTextureType_MAYA_SPECULAR, mesh);
+    TrySetTextureProperties(out_mat, _textures, "Maya|specularColor", aiTextureType_MAYA_SPECULAR_COLOR, mesh);
+    TrySetTextureProperties(out_mat, _textures, "Maya|specularRoughness", aiTextureType_MAYA_SPECULAR_ROUGHNESS, mesh);
 
     // Maya stingray
     TrySetTextureProperties(out_mat, _textures, "Maya|TEX_color_map", aiTextureType_BASE_COLOR, mesh);
@@ -2440,7 +2450,7 @@ void FBXConverter::SetShadingPropertiesRaw(aiMaterial *out_mat, const PropertyTa
 
                 // setup texture reference string (copied from ColladaLoader::FindFilenameForEffectTexture)
                 path.data[0] = '*';
-                path.length = 1 + ASSIMP_itoa10(path.data + 1, MAXLEN - 1, index);
+                path.length = 1 + ASSIMP_itoa10(path.data + 1, AI_MAXLEN - 1, index);
             }
 
             out_mat->AddProperty(&path, (name + "|file").c_str(), aiTextureType_UNKNOWN, 0);
@@ -2806,7 +2816,7 @@ void FBXConverter::ProcessMorphAnimDatas(std::map<std::string, morphAnimData *>
                                 auto geoIt = std::find(model->GetGeometry().begin(), model->GetGeometry().end(), geo);
                                 auto geoIndex = static_cast<unsigned int>(std::distance(model->GetGeometry().begin(), geoIt));
                                 auto name = aiString(FixNodeName(model->Name() + "*"));
-                                name.length = 1 + ASSIMP_itoa10(name.data + name.length, MAXLEN - 1, geoIndex);
+                                name.length = 1 + ASSIMP_itoa10(name.data + name.length, AI_MAXLEN - 1, geoIndex);
                                 morphAnimData *animData;
                                 auto animIt = morphAnimDatas->find(name.C_Str());
                                 if (animIt == morphAnimDatas->end()) {

code/AssetLib/FBX/FBXExporter.cpp

@@ -1051,7 +1051,7 @@ aiNode* get_node_for_mesh(unsigned int meshIndex, aiNode* node)
 aiMatrix4x4 get_world_transform(const aiNode* node, const aiScene* scene)
 {
     std::vector<const aiNode*> node_chain;
-    while (node != scene->mRootNode) {
+    while (node != scene->mRootNode && node != nullptr) {
         node_chain.push_back(node);
         node = node->mParent;
     }
@@ -1217,10 +1217,8 @@ void FBXExporter::WriteObjects ()
         }
 
         // colors, if any
-        // TODO only one color channel currently
-        const int32_t colorChannelIndex = 0;
-        if (m->HasVertexColors(colorChannelIndex)) {
-            FBX::Node vertexcolors("LayerElementColor", int32_t(colorChannelIndex));
+        for (size_t ci = 0; ci < m->GetNumColorChannels(); ++ci) {
+            FBX::Node vertexcolors("LayerElementColor", int32_t(ci));
             vertexcolors.Begin(outstream, binary, indent);
             vertexcolors.DumpProperties(outstream, binary, indent);
             vertexcolors.EndProperties(outstream, binary, indent);
@@ -1230,7 +1228,7 @@ void FBXExporter::WriteObjects ()
                 "Version", int32_t(101), outstream, binary, indent
             );
             char layerName[8];
-            snprintf(layerName, sizeof(layerName), "COLOR_%d", colorChannelIndex);
+            snprintf(layerName, sizeof(layerName), "COLOR_%d", int32_t(ci));
             FBX::Node::WritePropertyNode(
                 "Name", (const char*)layerName, outstream, binary, indent
             );
@@ -1247,7 +1245,7 @@ void FBXExporter::WriteObjects ()
             for (size_t fi = 0; fi < m->mNumFaces; ++fi) {
                 const aiFace &f = m->mFaces[fi];
                 for (size_t pvi = 0; pvi < f.mNumIndices; ++pvi) {
-                    const aiColor4D &c = m->mColors[colorChannelIndex][f.mIndices[pvi]];
+                    const aiColor4D &c = m->mColors[ci][f.mIndices[pvi]];
                     color_data.push_back(c.r);
                     color_data.push_back(c.g);
                     color_data.push_back(c.b);
@@ -1354,11 +1352,14 @@ void FBXExporter::WriteObjects ()
         le.AddChild("Type", "LayerElementNormal");
         le.AddChild("TypedIndex", int32_t(0));
         layer.AddChild(le);
-        // TODO only 1 color channel currently
-        le = FBX::Node("LayerElement");
-        le.AddChild("Type", "LayerElementColor");
-        le.AddChild("TypedIndex", int32_t(0));
-        layer.AddChild(le);
+
+        for (size_t ci = 0; ci < m->GetNumColorChannels(); ++ci) {
+            le = FBX::Node("LayerElement");
+            le.AddChild("Type", "LayerElementColor");
+            le.AddChild("TypedIndex", int32_t(ci));
+            layer.AddChild(le);
+        }
+
         le = FBX::Node("LayerElement");
         le.AddChild("Type", "LayerElementMaterial");
         le.AddChild("TypedIndex", int32_t(0));
@@ -1868,33 +1869,26 @@ void FBXExporter::WriteObjects ()
     // one sticky point is that the number of vertices may not match,
     // because assimp splits vertices by normal, uv, etc.
 
-    // functor for aiNode sorting
-    struct SortNodeByName
-    {
-        bool operator()(const aiNode *lhs, const aiNode *rhs) const
-        {
-            return strcmp(lhs->mName.C_Str(), rhs->mName.C_Str()) < 0;
-        }
-    };
 
     // first we should mark the skeleton for each mesh.
     // the skeleton must include not only the aiBones,
     // but also all their parent nodes.
     // anything that affects the position of any bone node must be included.
-    // Use SorNodeByName to make sure the exported result will be the same across all systems
-    // Otherwise the aiNodes of the skeleton would be sorted based on the pointer address, which isn't consistent
-    std::vector<std::set<const aiNode*, SortNodeByName>> skeleton_by_mesh(mScene->mNumMeshes);
+
+    // note that we want to preserve input order as much as possible here.
+    // previously, sorting by name lead to consistent output across systems, but was not
+    // suitable for downstream consumption by some applications.
+    std::vector<std::vector<const aiNode*>> skeleton_by_mesh(mScene->mNumMeshes);
     // at the same time we can build a list of all the skeleton nodes,
     // which will be used later to mark them as type "limbNode".
     std::unordered_set<const aiNode*> limbnodes;
 
     //actual bone nodes in fbx, without parenting-up
-    std::unordered_set<std::string> setAllBoneNamesInScene;
-    for(unsigned int m = 0; m < mScene->mNumMeshes; ++ m)
-    {
+    std::vector<std::string> allBoneNames;
+    for(unsigned int m = 0; m < mScene->mNumMeshes; ++ m) {
         aiMesh* pMesh = mScene->mMeshes[m];
         for(unsigned int b = 0; b < pMesh->mNumBones; ++ b)
-            setAllBoneNamesInScene.insert(pMesh->mBones[b]->mName.data);
+            allBoneNames.push_back(pMesh->mBones[b]->mName.data);
     }
     aiMatrix4x4 mxTransIdentity;
 
@@ -1902,7 +1896,7 @@ void FBXExporter::WriteObjects ()
     std::map<std::string,aiNode*> node_by_bone;
     for (size_t mi = 0; mi < mScene->mNumMeshes; ++mi) {
         const aiMesh* m = mScene->mMeshes[mi];
-        std::set<const aiNode*, SortNodeByName> skeleton;
+        std::vector<const aiNode*> skeleton;
         for (size_t bi =0; bi < m->mNumBones; ++bi) {
             const aiBone* b = m->mBones[bi];
             const std::string name(b->mName.C_Str());
@@ -1921,7 +1915,7 @@ void FBXExporter::WriteObjects ()
                 node_by_bone[name] = n;
                 limbnodes.insert(n);
             }
-            skeleton.insert(n);
+            skeleton.push_back(n);
             // mark all parent nodes as skeleton as well,
             // up until we find the root node,
             // or else the node containing the mesh,
@@ -1932,7 +1926,7 @@ void FBXExporter::WriteObjects ()
                 parent = parent->mParent
             ) {
                 // if we've already done this node we can skip it all
-                if (skeleton.count(parent)) {
+                if (std::find(skeleton.begin(), skeleton.end(), parent) != skeleton.end()) {
                     break;
                 }
                 // ignore fbx transform nodes as these will be collapsed later
@@ -1942,7 +1936,7 @@ void FBXExporter::WriteObjects ()
                     continue;
                 }
                 //not a bone in scene && no effect in transform
-                if(setAllBoneNamesInScene.find(node_name)==setAllBoneNamesInScene.end()
+                if (std::find(allBoneNames.begin(), allBoneNames.end(), node_name) == allBoneNames.end()
                    && parent->mTransformation == mxTransIdentity) {
                         continue;
                 }
@@ -2027,7 +2021,7 @@ void FBXExporter::WriteObjects ()
         aiMatrix4x4 mesh_xform = get_world_transform(mesh_node, mScene);
 
         // now make a subdeformer for each bone in the skeleton
-        const std::set<const aiNode*, SortNodeByName> skeleton= skeleton_by_mesh[mi];
+        const auto & skeleton= skeleton_by_mesh[mi];
         for (const aiNode* bone_node : skeleton) {
             // if there's a bone for this node, find it
             const aiBone* b = nullptr;
@@ -2493,6 +2487,57 @@ const std::map<std::string,std::pair<std::string,char>> transform_types = {
     {"GeometricScalingInverse", {"GeometricScalingInverse", 'i'}}
 };
 
+//add metadata to fbx property
+void add_meta(FBX::Node& fbx_node, const aiNode* node){
+    if(node->mMetaData == nullptr) return;
+    aiMetadata* meta = node->mMetaData;
+    for (unsigned int i = 0; i < meta->mNumProperties; ++i) {
+        aiString key = meta->mKeys[i];
+        aiMetadataEntry* entry = &meta->mValues[i];
+        switch (entry->mType) {
+        case AI_BOOL:{
+            bool val = *static_cast<bool *>(entry->mData);
+            fbx_node.AddP70bool(key.C_Str(), val);
+            break;
+        }
+        case AI_INT32:{
+            int32_t val = *static_cast<int32_t *>(entry->mData);
+            fbx_node.AddP70int(key.C_Str(), val);
+            break;
+        }
+        case AI_UINT64:{
+            //use string to add uint64
+            uint64_t val = *static_cast<uint64_t *>(entry->mData);
+            fbx_node.AddP70string(key.C_Str(), std::to_string(val).c_str());
+            break;
+        }
+        case AI_FLOAT:{
+            float val = *static_cast<float *>(entry->mData);
+            fbx_node.AddP70double(key.C_Str(), val);
+            break;
+        }
+        case AI_DOUBLE:{
+            double val = *static_cast<double *>(entry->mData);
+            fbx_node.AddP70double(key.C_Str(), val);
+            break;
+        }
+        case AI_AISTRING:{
+            aiString val = *static_cast<aiString *>(entry->mData);
+            fbx_node.AddP70string(key.C_Str(), val.C_Str());
+            break;
+        }
+        case AI_AIMETADATA: {
+            //ignore
+            break;
+        }
+        default:
+            break;
+        }
+        
+    }
+    
+}
+
 // write a single model node to the stream
 void FBXExporter::WriteModelNode(
     StreamWriterLE& outstream,
@@ -2560,6 +2605,7 @@ void FBXExporter::WriteModelNode(
             }
         }
     }
+    add_meta(p, node);
     m.AddChild(p);
 
     // not sure what these are for,

code/AssetLib/FBX/FBXImportSettings.h

@@ -156,6 +156,9 @@ struct ImportSettings {
     /** Set to true to perform a conversion from cm to meter after the import
     */
     bool convertToMeters;
+
+    // Set to true to ignore the axis configuration in the file
+    bool ignoreUpDirection = false;
 };
 
 } // namespace FBX

code/AssetLib/FBX/FBXImporter.cpp

@@ -117,6 +117,7 @@ void FBXImporter::SetupProperties(const Importer *pImp) {
     mSettings.useLegacyEmbeddedTextureNaming = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_EMBEDDED_TEXTURES_LEGACY_NAMING, false);
     mSettings.removeEmptyBones = pImp->GetPropertyBool(AI_CONFIG_IMPORT_REMOVE_EMPTY_BONES, true);
     mSettings.convertToMeters = pImp->GetPropertyBool(AI_CONFIG_FBX_CONVERT_TO_M, false);
+    mSettings.ignoreUpDirection = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_IGNORE_UP_DIRECTION, false);
     mSettings.useSkeleton = pImp->GetPropertyBool(AI_CONFIG_FBX_USE_SKELETON_BONE_CONTAINER, false);
 }
 

code/AssetLib/FBX/FBXMeshGeometry.cpp

@@ -644,10 +644,12 @@ void MeshGeometry::ReadVertexDataMaterials(std::vector<int>& materials_out, cons
         return;
     }
 
-    // materials are handled separately. First of all, they are assigned per-face
-    // and not per polyvert. Secondly, ReferenceInformationType=IndexToDirect
-    // has a slightly different meaning for materials.
-    ParseVectorDataArray(materials_out,GetRequiredElement(source,"Materials"));
+    if (source["Materials"]) {
+        // materials are handled separately. First of all, they are assigned per-face
+        // and not per polyvert. Secondly, ReferenceInformationType=IndexToDirect
+        // has a slightly different meaning for materials.
+        ParseVectorDataArray(materials_out, GetRequiredElement(source, "Materials"));
+    }
 
     if (MappingInformationType == "AllSame") {
         // easy - same material for all faces

code/AssetLib/FBX/FBXParser.h

@@ -134,7 +134,7 @@ public:
 		const char* elementNameCStr = elementName.c_str();
 		for (auto element = elements.begin(); element != elements.end(); ++element)
 		{
-			if (!ASSIMP_strincmp(element->first.c_str(), elementNameCStr, MAXLEN)) {
+            if (!ASSIMP_strincmp(element->first.c_str(), elementNameCStr, AI_MAXLEN)) {
 				return element->second;
 			}
 		}

code/AssetLib/IFC/IFCLoader.cpp

@@ -220,7 +220,7 @@ void IFCImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
     std::unique_ptr<STEP::DB> db(STEP::ReadFileHeader(std::move(stream)));
     const STEP::HeaderInfo &head = static_cast<const STEP::DB &>(*db).GetHeader();
 
-    if (!head.fileSchema.size() || head.fileSchema.substr(0, 3) != "IFC") {
+    if (!head.fileSchema.size() || head.fileSchema.substr(0, 4) != "IFC2") {
         ThrowException("Unrecognized file schema: " + head.fileSchema);
     }
 
@@ -260,6 +260,8 @@ void IFCImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
         ThrowException("missing IfcProject entity");
     }
 
+    
+
     ConversionData conv(*db, proj->To<Schema_2x3::IfcProject>(), pScene, settings);
     SetUnits(conv);
     SetCoordinateSpace(conv);
@@ -352,6 +354,11 @@ void ConvertUnit(const ::Assimp::STEP::EXPRESS::DataType &dt, ConversionData &co
 
 // ------------------------------------------------------------------------------------------------
 void SetUnits(ConversionData &conv) {
+    if (conv.proj.UnitsInContext == nullptr) {
+        IFCImporter::LogError("Skipping conversion data, nullptr.");
+        return;
+    }
+
     // see if we can determine the coordinate space used to express.
     for (size_t i = 0; i < conv.proj.UnitsInContext->Units.size(); ++i) {
         ConvertUnit(*conv.proj.UnitsInContext->Units[i], conv);

code/AssetLib/Irr/IRRLoader.cpp

@@ -168,7 +168,7 @@ void IRRImporter::BuildSkybox(std::vector<aiMesh *> &meshes, std::vector<aiMater
         aiMaterial *out = (aiMaterial *)(*(materials.end() - (6 - i)));
 
         aiString s;
-        s.length = ::ai_snprintf(s.data, MAXLEN, "SkyboxSide_%u", i);
+        s.length = ::ai_snprintf(s.data, AI_MAXLEN, "SkyboxSide_%u", i);
         out->AddProperty(&s, AI_MATKEY_NAME);
 
         int shading = aiShadingMode_NoShading;
@@ -316,7 +316,7 @@ void IRRImporter::ComputeAnimations(Node *root, aiNode *real, std::vector<aiNode
         if (cur != total - 1) {
             // Build a new name - a prefix instead of a suffix because it is
             // easier to check against
-            anim->mNodeName.length = ::ai_snprintf(anim->mNodeName.data, MAXLEN,
+            anim->mNodeName.length = ::ai_snprintf(anim->mNodeName.data, AI_MAXLEN,
                     "$INST_DUMMY_%i_%s", total - 1,
                     (root->name.length() ? root->name.c_str() : ""));
 

code/AssetLib/LWS/LWSLoader.cpp

@@ -78,7 +78,15 @@ static constexpr aiImporterDesc desc = {
 
 // ------------------------------------------------------------------------------------------------
 // Recursive parsing of LWS files
-void LWS::Element::Parse(const char *&buffer, const char *end) {
+namespace {
+    constexpr int MAX_DEPTH = 1000; // Define the maximum depth allowed
+}
+
+void LWS::Element::Parse(const char *&buffer, const char *end, int depth) {
+    if (depth > MAX_DEPTH) {
+        throw std::runtime_error("Maximum recursion depth exceeded in LWS::Element::Parse");
+    }
+
     for (; SkipSpacesAndLineEnd(&buffer, end); SkipLine(&buffer, end)) {
 
         // begin of a new element with children
@@ -121,7 +129,7 @@ void LWS::Element::Parse(const char *&buffer, const char *end) {
 
         // parse more elements recursively
         if (sub) {
-            children.back().Parse(buffer, end);
+            children.back().Parse(buffer, end, depth + 1);
         }
     }
 }
@@ -305,14 +313,14 @@ void LWSImporter::SetupNodeName(aiNode *nd, LWS::NodeDesc &src) {
             }
             std::string::size_type t = src.path.substr(s).find_last_of('.');
 
-            nd->mName.length = ::ai_snprintf(nd->mName.data, MAXLEN, "%s_(%08X)", src.path.substr(s).substr(0, t).c_str(), combined);
-            if (nd->mName.length > MAXLEN) {
-                nd->mName.length = MAXLEN;
+            nd->mName.length = ::ai_snprintf(nd->mName.data, AI_MAXLEN, "%s_(%08X)", src.path.substr(s).substr(0, t).c_str(), combined);
+            if (nd->mName.length > AI_MAXLEN) {
+                nd->mName.length = AI_MAXLEN;
             }
             return;
         }
     }
-    nd->mName.length = ::ai_snprintf(nd->mName.data, MAXLEN, "%s_(%08X)", src.name, combined);
+    nd->mName.length = ::ai_snprintf(nd->mName.data, AI_MAXLEN, "%s_(%08X)", src.name, combined);
 }
 
 // ------------------------------------------------------------------------------------------------

code/AssetLib/LWS/LWSLoader.h

@@ -76,7 +76,7 @@ public:
     std::list<Element> children;
 
     //! Recursive parsing function
-    void Parse(const char *&buffer, const char *end);
+    void Parse(const char *&buffer, const char *end, int depth = 0);
 };
 
 #define AI_LWS_MASK (0xffffffff >> 4u)

code/AssetLib/MD3/MD3Loader.cpp

@@ -724,6 +724,7 @@ void MD3Importer::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
     std::vector<unsigned char> mBuffer2(fileSize);
     file->Read(&mBuffer2[0], 1, fileSize);
     mBuffer = &mBuffer2[0];
+    const unsigned char* bufferEnd = mBuffer + fileSize;
 
     pcHeader = (BE_NCONST MD3::Header *)mBuffer;
 
@@ -749,9 +750,15 @@ void MD3Importer::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
 
     // Navigate to the list of surfaces
     BE_NCONST MD3::Surface *pcSurfaces = (BE_NCONST MD3::Surface *)(mBuffer + pcHeader->OFS_SURFACES);
+    if ((const unsigned char*)pcSurfaces + sizeof(MD3::Surface) * pcHeader->NUM_SURFACES > bufferEnd) {
+        throw DeadlyImportError("MD3 surface headers are outside the file");
+    }
 
     // Navigate to the list of tags
     BE_NCONST MD3::Tag *pcTags = (BE_NCONST MD3::Tag *)(mBuffer + pcHeader->OFS_TAGS);
+    if ((const unsigned char*)pcTags + sizeof(MD3::Tag) * pcHeader->NUM_TAGS > bufferEnd) {
+        throw DeadlyImportError("MD3 tags are outside the file");
+    }
 
     // Allocate output storage
     pScene->mNumMeshes = pcHeader->NUM_SURFACES;
@@ -1026,6 +1033,10 @@ void MD3Importer::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
 
         for (unsigned int i = 0; i < pcHeader->NUM_TAGS; ++i, ++pcTags) {
             aiNode *nd = pScene->mRootNode->mChildren[i] = new aiNode();
+            if ((const unsigned char*)pcTags + sizeof(MD3::Tag) > bufferEnd) {
+                throw DeadlyImportError("MD3 tag is outside the file");
+            }
+
             nd->mName.Set((const char *)pcTags->NAME);
             nd->mParent = pScene->mRootNode;
 

code/AssetLib/MD5/MD5Loader.cpp

@@ -707,7 +707,7 @@ void MD5Importer::LoadMD5CameraFile() {
     for (std::vector<unsigned int>::const_iterator it = cuts.begin(); it != cuts.end() - 1; ++it) {
 
         aiAnimation *anim = *tmp++ = new aiAnimation();
-        anim->mName.length = ::ai_snprintf(anim->mName.data, MAXLEN, "anim%u_from_%u_to_%u", (unsigned int)(it - cuts.begin()), (*it), *(it + 1));
+        anim->mName.length = ::ai_snprintf(anim->mName.data, AI_MAXLEN, "anim%u_from_%u_to_%u", (unsigned int)(it - cuts.begin()), (*it), *(it + 1));
 
         anim->mTicksPerSecond = cameraParser.fFrameRate;
         anim->mChannels = new aiNodeAnim *[anim->mNumChannels = 1];

code/AssetLib/MD5/MD5Parser.cpp

@@ -234,8 +234,12 @@ inline void AI_MD5_READ_TRIPLE(aiVector3D &vec, const char **sz, const char *buf
     AI_MD5_SKIP_SPACES(sz, bufferEnd, linenumber);
     if ('(' != **sz) {
         MD5Parser::ReportWarning("Unexpected token: ( was expected", linenumber);
+        if (*sz == bufferEnd)
+            return;
         ++*sz;
     }
+    if (*sz == bufferEnd)
+        return;
     ++*sz;
     AI_MD5_SKIP_SPACES(sz, bufferEnd, linenumber);
     *sz = fast_atoreal_move<float>(*sz, (float &)vec.x);
@@ -247,6 +251,8 @@ inline void AI_MD5_READ_TRIPLE(aiVector3D &vec, const char **sz, const char *buf
     if (')' != **sz) {
         MD5Parser::ReportWarning("Unexpected token: ) was expected", linenumber);
     }
+    if (*sz == bufferEnd)
+        return;
     ++*sz;
 }
 

code/AssetLib/MDL/HalfLife/HL1ImportSettings.h

@@ -63,7 +63,8 @@ struct HL1ImportSettings {
         read_bone_controllers(false),
         read_hitboxes(false),
         read_textures(false),
-        read_misc_global_info(false) {
+        read_misc_global_info(false),
+        transform_coord_system(true) {
     }
 
     bool read_animations;
@@ -76,6 +77,7 @@ struct HL1ImportSettings {
     bool read_hitboxes;
     bool read_textures;
     bool read_misc_global_info;
+    bool transform_coord_system;
 };
 
 } // namespace HalfLife

code/AssetLib/MDL/MDLLoader.cpp

@@ -99,7 +99,7 @@ MDLImporter::MDLImporter() :
 // ------------------------------------------------------------------------------------------------
 // Returns whether the class can handle the format of the given file.
 bool MDLImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*checkSig*/) const {
-    static const uint32_t tokens[] = {
+    static constexpr uint32_t tokens[] = {
         AI_MDL_MAGIC_NUMBER_LE_HL2a,
         AI_MDL_MAGIC_NUMBER_LE_HL2b,
         AI_MDL_MAGIC_NUMBER_LE_GS7,
@@ -138,6 +138,7 @@ void MDLImporter::SetupProperties(const Importer *pImp) {
     mHL1ImportSettings.read_bone_controllers = pImp->GetPropertyBool(AI_CONFIG_IMPORT_MDL_HL1_READ_BONE_CONTROLLERS, true);
     mHL1ImportSettings.read_hitboxes = pImp->GetPropertyBool(AI_CONFIG_IMPORT_MDL_HL1_READ_HITBOXES, true);
     mHL1ImportSettings.read_misc_global_info = pImp->GetPropertyBool(AI_CONFIG_IMPORT_MDL_HL1_READ_MISC_GLOBAL_INFO, true);
+    mHL1ImportSettings.transform_coord_system = pImp->GetPropertyBool(AI_CONFIG_IMPORT_MDL_HL1_TRANSFORM_COORD_SYSTEM);
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -146,6 +147,20 @@ const aiImporterDesc *MDLImporter::GetInfo() const {
     return &desc;
 }
 
+// ------------------------------------------------------------------------------------------------
+static void transformCoordinateSystem(const aiScene *pScene) {
+    if (pScene == nullptr) {
+        return;
+    }
+
+    pScene->mRootNode->mTransformation = aiMatrix4x4(
+        0.f, -1.f, 0.f, 0.f,
+        0.f, 0.f, 1.f, 0.f,
+        -1.f, 0.f, 0.f, 0.f,
+        0.f, 0.f, 0.f, 1.f
+    );
+}
+
 // ------------------------------------------------------------------------------------------------
 // Imports the given file into the given scene structure.
 void MDLImporter::InternReadFile(const std::string &pFile,
@@ -246,18 +261,16 @@ void MDLImporter::InternReadFile(const std::string &pFile,
                                     ". Magic word (", ai_str_toprintable((const char *)&iMagicWord, sizeof(iMagicWord)), ") is not known");
         }
 
-        if (is_half_life){
+        if (is_half_life && mHL1ImportSettings.transform_coord_system) {
             // Now rotate the whole scene 90 degrees around the z and x axes to convert to internal coordinate system
-            pScene->mRootNode->mTransformation = aiMatrix4x4(
-                    0.f, -1.f, 0.f, 0.f,
-                    0.f, 0.f, 1.f, 0.f,
-                    -1.f, 0.f, 0.f, 0.f,
-                    0.f, 0.f, 0.f, 1.f);
-        }
-        else {
+            transformCoordinateSystem(pScene);
+        } else {
             // Now rotate the whole scene 90 degrees around the x axis to convert to internal coordinate system
-            pScene->mRootNode->mTransformation = aiMatrix4x4(1.f, 0.f, 0.f, 0.f,
-                    0.f, 0.f, 1.f, 0.f, 0.f, -1.f, 0.f, 0.f, 0.f, 0.f, 0.f, 1.f);
+            pScene->mRootNode->mTransformation = aiMatrix4x4(
+                1.f,  0.f, 0.f, 0.f,
+                0.f,  0.f, 1.f, 0.f, 
+                0.f, -1.f, 0.f, 0.f, 
+                0.f,  0.f, 0.f, 1.f);
         }
 
         DeleteBufferAndCleanup();
@@ -962,7 +975,7 @@ void MDLImporter::CalcAbsBoneMatrices_3DGS_MDL7(MDL::IntBone_MDL7 **apcOutBones)
 
                 if (AI_MDL7_BONE_STRUCT_SIZE__NAME_IS_NOT_THERE == pcHeader->bone_stc_size) {
                     // no real name for our poor bone is specified :-(
-                    pcOutBone->mName.length = ai_snprintf(pcOutBone->mName.data, MAXLEN,
+                    pcOutBone->mName.length = ai_snprintf(pcOutBone->mName.data, AI_MAXLEN,
                             "UnnamedBone_%i", iBone);
                 } else {
                     // Make sure we won't run over the buffer's end if there is no
@@ -1567,7 +1580,7 @@ void MDLImporter::InternReadFile_3DGS_MDL7() {
             } else {
                 pcNode->mName.length = (ai_uint32)::strlen(szBuffer);
             }
-            ::strncpy(pcNode->mName.data, szBuffer, MAXLEN - 1);
+            ::strncpy(pcNode->mName.data, szBuffer, AI_MAXLEN - 1);
             ++p;
         }
     }

code/AssetLib/MDL/MDLMaterialLoader.cpp

@@ -494,7 +494,7 @@ void MDLImporter::ParseSkinLump_3DGS_MDL7(
 
         aiString szFile;
         const size_t iLen = strlen((const char *)szCurrent);
-        size_t iLen2 = iLen > (MAXLEN - 1) ? (MAXLEN - 1) : iLen;
+        size_t iLen2 = iLen > (AI_MAXLEN - 1) ? (AI_MAXLEN - 1) : iLen;
         memcpy(szFile.data, (const char *)szCurrent, iLen2);
         szFile.data[iLen2] = '\0';
         szFile.length = static_cast<ai_uint32>(iLen2);
@@ -610,7 +610,7 @@ void MDLImporter::ParseSkinLump_3DGS_MDL7(
         if (is_not_qnan(clrTexture.r)) {
             clrTemp.r *= clrTexture.a;
         }
-        pcMatOut->AddProperty<ai_real>(&clrTemp.r, 1, AI_MATKEY_OPACITY);
+        pcMatOut->AddProperty<float>(&clrTemp.r, 1, AI_MATKEY_OPACITY);
 
         // read phong power
         int iShadingMode = (int)aiShadingMode_Gouraud;
@@ -730,10 +730,12 @@ void MDLImporter::SkipSkinLump_3DGS_MDL7(
     // if an ASCII effect description (HLSL?) is contained in the file,
     // we can simply ignore it ...
     if (iType & AI_MDL7_SKINTYPE_MATERIAL_ASCDEF) {
+        VALIDATE_FILE_SIZE(szCurrent + sizeof(int32_t));
         int32_t iMe = 0;
         ::memcpy(&iMe, szCurrent, sizeof(int32_t));
         AI_SWAP4(iMe);
         szCurrent += sizeof(char) * iMe + sizeof(int32_t);
+        VALIDATE_FILE_SIZE(szCurrent);
     }
     *szCurrentOut = szCurrent;
 }

code/AssetLib/OFF/OFFLoader.cpp

@@ -316,7 +316,7 @@ void OFFImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
     pScene->mMaterials = new aiMaterial *[pScene->mNumMaterials];
     aiMaterial *pcMat = new aiMaterial();
 
-    aiColor4D clr(ai_real(0.6), ai_real(0.6), ai_real(0.6), ai_real(1.0));
+    aiColor4D clr(0.6f, 0.6f, 0.6f, 1.0f);
     pcMat->AddProperty(&clr, 1, AI_MATKEY_COLOR_DIFFUSE);
     pScene->mMaterials[0] = pcMat;
 

code/AssetLib/Obj/ObjFileData.h

@@ -199,12 +199,12 @@ struct Material {
 
     //! Constructor
     Material() :
-            diffuse(ai_real(0.6), ai_real(0.6), ai_real(0.6)),
+            diffuse(0.6f, 0.6f, 0.6f),
             alpha(ai_real(1.0)),
             shineness(ai_real(0.0)),
             illumination_model(1),
             ior(ai_real(1.0)),
-            transparent(ai_real(1.0), ai_real(1.0), ai_real(1.0)),
+            transparent(1.0f, 1.0, 1.0),
             roughness(),
             metallic(),
             sheen(),

code/AssetLib/Obj/ObjFileImporter.cpp

@@ -193,7 +193,7 @@ void ObjFileImporter::CreateDataFromImport(const ObjFile::Model *pModel, aiScene
         pScene->mRootNode->mChildren = new aiNode *[childCount];
 
         // Create nodes for the whole scene
-        std::vector<aiMesh *> MeshArray;
+        std::vector<std::unique_ptr<aiMesh>> MeshArray;
         MeshArray.reserve(meshCount);
         for (size_t index = 0; index < pModel->mObjects.size(); ++index) {
             createNodes(pModel, pModel->mObjects[index], pScene->mRootNode, pScene, MeshArray);
@@ -205,7 +205,7 @@ void ObjFileImporter::CreateDataFromImport(const ObjFile::Model *pModel, aiScene
         if (pScene->mNumMeshes > 0) {
             pScene->mMeshes = new aiMesh *[MeshArray.size()];
             for (size_t index = 0; index < MeshArray.size(); ++index) {
-                pScene->mMeshes[index] = MeshArray[index];
+                pScene->mMeshes[index] = MeshArray[index].release();
             }
         }
 
@@ -257,7 +257,7 @@ void ObjFileImporter::CreateDataFromImport(const ObjFile::Model *pModel, aiScene
 //  Creates all nodes of the model
 aiNode *ObjFileImporter::createNodes(const ObjFile::Model *pModel, const ObjFile::Object *pObject,
         aiNode *pParent, aiScene *pScene,
-        std::vector<aiMesh *> &MeshArray) {
+        std::vector<std::unique_ptr<aiMesh>> &MeshArray) {
     ai_assert(nullptr != pModel);
     if (nullptr == pObject) {
         return nullptr;
@@ -275,12 +275,10 @@ aiNode *ObjFileImporter::createNodes(const ObjFile::Model *pModel, const ObjFile
 
     for (size_t i = 0; i < pObject->m_Meshes.size(); ++i) {
         unsigned int meshId = pObject->m_Meshes[i];
-        aiMesh *pMesh = createTopology(pModel, pObject, meshId);
+        std::unique_ptr<aiMesh> pMesh = createTopology(pModel, pObject, meshId);
         if (pMesh != nullptr) {
             if (pMesh->mNumFaces > 0) {
-                MeshArray.push_back(pMesh);
-            } else {
-                delete pMesh;
+                MeshArray.push_back(std::move(pMesh));
             }
         }
     }
@@ -312,7 +310,7 @@ aiNode *ObjFileImporter::createNodes(const ObjFile::Model *pModel, const ObjFile
 
 // ------------------------------------------------------------------------------------------------
 //  Create topology data
-aiMesh *ObjFileImporter::createTopology(const ObjFile::Model *pModel, const ObjFile::Object *pData, unsigned int meshIndex) {
+std::unique_ptr<aiMesh> ObjFileImporter::createTopology(const ObjFile::Model *pModel, const ObjFile::Object *pData, unsigned int meshIndex) {
     // Checking preconditions
     ai_assert(nullptr != pModel);
 
@@ -394,7 +392,7 @@ aiMesh *ObjFileImporter::createTopology(const ObjFile::Model *pModel, const ObjF
     // Create mesh vertices
     createVertexArray(pModel, pData, meshIndex, pMesh.get(), uiIdxCount);
 
-    return pMesh.release();
+    return pMesh;
 }
 
 // ------------------------------------------------------------------------------------------------

code/AssetLib/Obj/ObjFileImporter.h

@@ -44,6 +44,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <assimp/BaseImporter.h>
 #include <assimp/material.h>
+#include <memory>
 #include <vector>
 
 struct aiMesh;
@@ -84,10 +85,10 @@ protected:
 
     //! \brief  Creates all nodes stored in imported content.
     aiNode *createNodes(const ObjFile::Model *pModel, const ObjFile::Object *pData,
-            aiNode *pParent, aiScene *pScene, std::vector<aiMesh *> &MeshArray);
+            aiNode *pParent, aiScene *pScene, std::vector<std::unique_ptr<aiMesh>> &MeshArray);
 
     //! \brief  Creates topology data like faces and meshes for the geometry.
-    aiMesh *createTopology(const ObjFile::Model *pModel, const ObjFile::Object *pData,
+    std::unique_ptr<aiMesh> createTopology(const ObjFile::Model *pModel, const ObjFile::Object *pData,
             unsigned int uiMeshIndex);
 
     //! \brief  Creates vertices from model.

code/AssetLib/Ply/PlyExporter.cpp

@@ -346,10 +346,22 @@ void PlyExporter::WriteMeshVertsBinary(const aiMesh* m, unsigned int components)
 
         for (unsigned int n = PLY_EXPORT_HAS_COLORS, c = 0; (components & n) && c != AI_MAX_NUMBER_OF_COLOR_SETS; n <<= 1, ++c) {
             if (m->HasVertexColors(c)) {
-                mOutput.write(reinterpret_cast<const char*>(&m->mColors[c][i].r), 16);
+                unsigned char rgba[4] = {
+                    static_cast<unsigned char>(m->mColors[c][i].r * 255),
+                    static_cast<unsigned char>(m->mColors[c][i].g * 255),
+                    static_cast<unsigned char>(m->mColors[c][i].b * 255),
+                    static_cast<unsigned char>(m->mColors[c][i].a * 255)
+                };
+                mOutput.write(reinterpret_cast<const char*>(&rgba), 4);
             }
             else {
-                mOutput.write(reinterpret_cast<const char*>(&defaultColor.r), 16);
+                unsigned char rgba[4] = {
+                    static_cast<unsigned char>(defaultColor.r * 255),
+                    static_cast<unsigned char>(defaultColor.g * 255),
+                    static_cast<unsigned char>(defaultColor.b * 255), 
+                    static_cast<unsigned char>(defaultColor.a * 255)
+                };
+                mOutput.write(reinterpret_cast<const char*>(&rgba), 4);
             }
         }
 

code/AssetLib/Ply/PlyLoader.cpp

@@ -81,6 +81,27 @@ namespace {
 
         return props[idx];
     }
+
+    // ------------------------------------------------------------------------------------------------
+    static bool isBigEndian(const char *szMe) {
+        ai_assert(nullptr != szMe);
+
+        // binary_little_endian
+        // binary_big_endian
+        bool isBigEndian{ false };
+#if (defined AI_BUILD_BIG_ENDIAN)
+        if ('l' == *szMe || 'L' == *szMe) {
+            isBigEndian = true;
+        }
+#else
+        if ('b' == *szMe || 'B' == *szMe) {
+            isBigEndian = true;
+        }
+#endif // ! AI_BUILD_BIG_ENDIAN
+
+        return isBigEndian;
+    }
+
 } // namespace
 
 // ------------------------------------------------------------------------------------------------
@@ -92,6 +113,11 @@ PLYImporter::PLYImporter() :
     // empty
 }
 
+// ------------------------------------------------------------------------------------------------
+PLYImporter::~PLYImporter() {
+    delete mGeneratedMesh;
+}
+
 // ------------------------------------------------------------------------------------------------
 // Returns whether the class can handle the format of the given file.
 bool PLYImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*checkSig*/) const {
@@ -104,26 +130,6 @@ const aiImporterDesc *PLYImporter::GetInfo() const {
     return &desc;
 }
 
-// ------------------------------------------------------------------------------------------------
-static bool isBigEndian(const char *szMe) {
-    ai_assert(nullptr != szMe);
-
-    // binary_little_endian
-    // binary_big_endian
-    bool isBigEndian(false);
-#if (defined AI_BUILD_BIG_ENDIAN)
-    if ('l' == *szMe || 'L' == *szMe) {
-        isBigEndian = true;
-    }
-#else
-    if ('b' == *szMe || 'B' == *szMe) {
-        isBigEndian = true;
-    }
-#endif // ! AI_BUILD_BIG_ENDIAN
-
-    return isBigEndian;
-}
-
 // ------------------------------------------------------------------------------------------------
 // Imports the given file into the given scene structure.
 void PLYImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) {
@@ -134,7 +140,7 @@ void PLYImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
     }
 
     // Get the file-size
-    const size_t fileSize(fileStream->FileSize());
+    const size_t fileSize = fileStream->FileSize();
     if (0 == fileSize) {
         throw DeadlyImportError("File ", pFile, " is empty.");
     }
@@ -180,7 +186,7 @@ void PLYImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
             }
         } else if (!::strncmp(szMe, "binary_", 7)) {
             szMe += 7;
-            const bool bIsBE(isBigEndian(szMe));
+            const bool bIsBE = isBigEndian(szMe);
 
             // skip the line, parse the rest of the header and build the DOM
             if (!PLY::DOM::ParseInstanceBinary(streamedBuffer, &sPlyDom, this, bIsBE)) {
@@ -242,6 +248,8 @@ void PLYImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
     pScene->mNumMeshes = 1;
     pScene->mMeshes = new aiMesh *[pScene->mNumMeshes];
     pScene->mMeshes[0] = mGeneratedMesh;    
+
+    // Move the mesh ownership into the scene instance
     mGeneratedMesh = nullptr;
 
     // generate a simple node structure
@@ -254,20 +262,22 @@ void PLYImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
     }
 }
 
+static constexpr ai_uint NotSet = 0xFFFFFFFF;
+
 void PLYImporter::LoadVertex(const PLY::Element *pcElement, const PLY::ElementInstance *instElement, unsigned int pos) {
     ai_assert(nullptr != pcElement);
     ai_assert(nullptr != instElement);
 
-    ai_uint aiPositions[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
+    ai_uint aiPositions[3] = { NotSet, NotSet, NotSet };
     PLY::EDataType aiTypes[3] = { EDT_Char, EDT_Char, EDT_Char };
 
-    ai_uint aiNormal[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
+    ai_uint aiNormal[3] = { NotSet, NotSet, NotSet };
     PLY::EDataType aiNormalTypes[3] = { EDT_Char, EDT_Char, EDT_Char };
 
-    unsigned int aiColors[4] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
+    unsigned int aiColors[4] = { NotSet, NotSet, NotSet, NotSet };
     PLY::EDataType aiColorsTypes[4] = { EDT_Char, EDT_Char, EDT_Char, EDT_Char };
 
-    unsigned int aiTexcoord[2] = { 0xFFFFFFFF, 0xFFFFFFFF };
+    unsigned int aiTexcoord[2] = { NotSet, NotSet };
     PLY::EDataType aiTexcoordTypes[2] = { EDT_Char, EDT_Char };
 
     // now check whether which normal components are available
@@ -337,17 +347,17 @@ void PLYImporter::LoadVertex(const PLY::Element *pcElement, const PLY::ElementIn
     if (0 != cnt) {
         // Position
         aiVector3D vOut;
-        if (0xFFFFFFFF != aiPositions[0]) {
+        if (NotSet != aiPositions[0]) {
             vOut.x = PLY::PropertyInstance::ConvertTo<ai_real>(
                     GetProperty(instElement->alProperties, aiPositions[0]).avList.front(), aiTypes[0]);
         }
 
-        if (0xFFFFFFFF != aiPositions[1]) {
+        if (NotSet != aiPositions[1]) {
             vOut.y = PLY::PropertyInstance::ConvertTo<ai_real>(
                     GetProperty(instElement->alProperties, aiPositions[1]).avList.front(), aiTypes[1]);
         }
 
-        if (0xFFFFFFFF != aiPositions[2]) {
+        if (NotSet != aiPositions[2]) {
             vOut.z = PLY::PropertyInstance::ConvertTo<ai_real>(
                     GetProperty(instElement->alProperties, aiPositions[2]).avList.front(), aiTypes[2]);
         }
@@ -355,19 +365,19 @@ void PLYImporter::LoadVertex(const PLY::Element *pcElement, const PLY::ElementIn
         // Normals
         aiVector3D nOut;
         bool haveNormal = false;
-        if (0xFFFFFFFF != aiNormal[0]) {
+        if (NotSet != aiNormal[0]) {
             nOut.x = PLY::PropertyInstance::ConvertTo<ai_real>(
                     GetProperty(instElement->alProperties, aiNormal[0]).avList.front(), aiNormalTypes[0]);
             haveNormal = true;
         }
 
-        if (0xFFFFFFFF != aiNormal[1]) {
+        if (NotSet != aiNormal[1]) {
             nOut.y = PLY::PropertyInstance::ConvertTo<ai_real>(
                     GetProperty(instElement->alProperties, aiNormal[1]).avList.front(), aiNormalTypes[1]);
             haveNormal = true;
         }
 
-        if (0xFFFFFFFF != aiNormal[2]) {
+        if (NotSet != aiNormal[2]) {
             nOut.z = PLY::PropertyInstance::ConvertTo<ai_real>(
                     GetProperty(instElement->alProperties, aiNormal[2]).avList.front(), aiNormalTypes[2]);
             haveNormal = true;
@@ -376,7 +386,7 @@ void PLYImporter::LoadVertex(const PLY::Element *pcElement, const PLY::ElementIn
         // Colors
         aiColor4D cOut;
         bool haveColor = false;
-        if (0xFFFFFFFF != aiColors[0]) {
+        if (NotSet != aiColors[0]) {
             cOut.r = NormalizeColorValue(GetProperty(instElement->alProperties,
                                                  aiColors[0])
                                                  .avList.front(),
@@ -384,7 +394,7 @@ void PLYImporter::LoadVertex(const PLY::Element *pcElement, const PLY::ElementIn
             haveColor = true;
         }
 
-        if (0xFFFFFFFF != aiColors[1]) {
+        if (NotSet != aiColors[1]) {
             cOut.g = NormalizeColorValue(GetProperty(instElement->alProperties,
                                                  aiColors[1])
                                                  .avList.front(),
@@ -392,7 +402,7 @@ void PLYImporter::LoadVertex(const PLY::Element *pcElement, const PLY::ElementIn
             haveColor = true;
         }
 
-        if (0xFFFFFFFF != aiColors[2]) {
+        if (NotSet != aiColors[2]) {
             cOut.b = NormalizeColorValue(GetProperty(instElement->alProperties,
                                                  aiColors[2])
                                                  .avList.front(),
@@ -401,7 +411,7 @@ void PLYImporter::LoadVertex(const PLY::Element *pcElement, const PLY::ElementIn
         }
 
         // assume 1.0 for the alpha channel if it is not set
-        if (0xFFFFFFFF == aiColors[3]) {
+        if (NotSet == aiColors[3]) {
             cOut.a = 1.0;
         } else {
             cOut.a = NormalizeColorValue(GetProperty(instElement->alProperties,
@@ -416,13 +426,13 @@ void PLYImporter::LoadVertex(const PLY::Element *pcElement, const PLY::ElementIn
         aiVector3D tOut;
         tOut.z = 0;
         bool haveTextureCoords = false;
-        if (0xFFFFFFFF != aiTexcoord[0]) {
+        if (NotSet != aiTexcoord[0]) {
             tOut.x = PLY::PropertyInstance::ConvertTo<ai_real>(
                     GetProperty(instElement->alProperties, aiTexcoord[0]).avList.front(), aiTexcoordTypes[0]);
             haveTextureCoords = true;
         }
 
-        if (0xFFFFFFFF != aiTexcoord[1]) {
+        if (NotSet != aiTexcoord[1]) {
             tOut.y = PLY::PropertyInstance::ConvertTo<ai_real>(
                     GetProperty(instElement->alProperties, aiTexcoord[1]).avList.front(), aiTexcoordTypes[1]);
             haveTextureCoords = true;
@@ -438,6 +448,9 @@ void PLYImporter::LoadVertex(const PLY::Element *pcElement, const PLY::ElementIn
             mGeneratedMesh->mNumVertices = pcElement->NumOccur;
             mGeneratedMesh->mVertices = new aiVector3D[mGeneratedMesh->mNumVertices];
         }
+        if (pos >= mGeneratedMesh->mNumVertices) {
+            throw DeadlyImportError("Invalid .ply file: Too many vertices");
+        }
 
         mGeneratedMesh->mVertices[pos] = vOut;
 
@@ -504,16 +517,12 @@ void PLYImporter::LoadFace(const PLY::Element *pcElement, const PLY::ElementInst
     bool bOne = false;
 
     // index of the vertex index list
-    unsigned int iProperty = 0xFFFFFFFF;
+    unsigned int iProperty = NotSet;
     PLY::EDataType eType = EDT_Char;
     bool bIsTriStrip = false;
 
-    // index of the material index property
-    // unsigned int iMaterialIndex = 0xFFFFFFFF;
-    // PLY::EDataType eType2 = EDT_Char;
-
     // texture coordinates
-    unsigned int iTextureCoord = 0xFFFFFFFF;
+    unsigned int iTextureCoord = NotSet;
     PLY::EDataType eType3 = EDT_Char;
 
     // face = unique number of vertex indices
@@ -564,11 +573,15 @@ void PLYImporter::LoadFace(const PLY::Element *pcElement, const PLY::ElementInst
         if (mGeneratedMesh->mFaces == nullptr) {
             mGeneratedMesh->mNumFaces = pcElement->NumOccur;
             mGeneratedMesh->mFaces = new aiFace[mGeneratedMesh->mNumFaces];
+        } else {
+            if (mGeneratedMesh->mNumFaces < pcElement->NumOccur) {
+                throw DeadlyImportError("Invalid .ply file: Too many faces");
+            }
         }
 
         if (!bIsTriStrip) {
             // parse the list of vertex indices
-            if (0xFFFFFFFF != iProperty) {
+            if (NotSet != iProperty) {
                 const unsigned int iNum = (unsigned int)GetProperty(instElement->alProperties, iProperty).avList.size();
                 mGeneratedMesh->mFaces[pos].mNumIndices = iNum;
                 mGeneratedMesh->mFaces[pos].mIndices = new unsigned int[iNum];
@@ -581,15 +594,7 @@ void PLYImporter::LoadFace(const PLY::Element *pcElement, const PLY::ElementInst
                 }
             }
 
-            // parse the material index
-            // cannot be handled without processing the whole file first
-            /*if (0xFFFFFFFF != iMaterialIndex)
-        {
-            mGeneratedMesh->mFaces[pos]. = PLY::PropertyInstance::ConvertTo<unsigned int>(
-            GetProperty(instElement->alProperties, iMaterialIndex).avList.front(), eType2);
-        }*/
-
-            if (0xFFFFFFFF != iTextureCoord) {
+            if (NotSet != iTextureCoord) {
                 const unsigned int iNum = (unsigned int)GetProperty(instElement->alProperties, iTextureCoord).avList.size();
 
                 // should be 6 coords
@@ -675,41 +680,29 @@ void PLYImporter::GetMaterialColor(const std::vector<PLY::PropertyInstance> &avL
         aiColor4D *clrOut) {
     ai_assert(nullptr != clrOut);
 
-    if (0xFFFFFFFF == aiPositions[0])
+    if (NotSet == aiPositions[0]) {
         clrOut->r = 0.0f;
-    else {
-        clrOut->r = NormalizeColorValue(GetProperty(avList,
-                                                aiPositions[0])
-                                                .avList.front(),
-                aiTypes[0]);
+    } else {
+        clrOut->r = NormalizeColorValue(GetProperty(avList, aiPositions[0]).avList.front(), aiTypes[0]);
     }
 
-    if (0xFFFFFFFF == aiPositions[1])
+    if (NotSet == aiPositions[1]) {
         clrOut->g = 0.0f;
-    else {
-        clrOut->g = NormalizeColorValue(GetProperty(avList,
-                                                aiPositions[1])
-                                                .avList.front(),
-                aiTypes[1]);
+    } else {
+        clrOut->g = NormalizeColorValue(GetProperty(avList, aiPositions[1]).avList.front(), aiTypes[1]);
     }
 
-    if (0xFFFFFFFF == aiPositions[2])
+    if (NotSet == aiPositions[2])
         clrOut->b = 0.0f;
     else {
-        clrOut->b = NormalizeColorValue(GetProperty(avList,
-                                                aiPositions[2])
-                                                .avList.front(),
-                aiTypes[2]);
+        clrOut->b = NormalizeColorValue(GetProperty(avList, aiPositions[2]).avList.front(), aiTypes[2]);
     }
 
     // assume 1.0 for the alpha channel ifit is not set
-    if (0xFFFFFFFF == aiPositions[3])
+    if (NotSet == aiPositions[3])
         clrOut->a = 1.0f;
     else {
-        clrOut->a = NormalizeColorValue(GetProperty(avList,
-                                                aiPositions[3])
-                                                .avList.front(),
-                aiTypes[3]);
+        clrOut->a = NormalizeColorValue(GetProperty(avList, aiPositions[3]).avList.front(), aiTypes[3]);
     }
 }
 

code/AssetLib/Ply/PlyLoader.h

@@ -62,10 +62,10 @@ using namespace PLY;
 // ---------------------------------------------------------------------------
 /** Importer class to load the stanford PLY file format
 */
-class PLYImporter : public BaseImporter {
+class PLYImporter final : public BaseImporter {
 public:
     PLYImporter();
-    ~PLYImporter() override = default;
+    ~PLYImporter() override;
 
     // -------------------------------------------------------------------
     /** Returns whether the class can handle the format of the given file.
@@ -120,13 +120,9 @@ protected:
             PLY::PropertyInstance::ValueUnion val,
             PLY::EDataType eType);
 
-    /** Buffer to hold the loaded file */
+private:
     unsigned char *mBuffer;
-
-    /** Document object model representation extracted from the file */
     PLY::DOM *pcDOM;
-
-    /** Mesh generated by loader */
     aiMesh *mGeneratedMesh;
 };
 

code/AssetLib/Ply/PlyParser.cpp

@@ -48,10 +48,29 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/ByteSwapper.h>
 #include <assimp/fast_atof.h>
 #include <assimp/DefaultLogger.hpp>
+#include <unordered_set>
 #include <utility>
 
 namespace Assimp {
 
+std::string to_string(EElementSemantic e) {
+
+    switch (e) {
+    case EEST_Vertex:
+        return std::string{ "vertex" };
+    case EEST_TriStrip:
+        return std::string{ "tristrips" };
+    case EEST_Edge:
+        return std::string{ "edge" };
+    case EEST_Material:
+        return std::string{ "material" };
+    case EEST_TextureFile:
+        return std::string{ "TextureFile" };
+    default:
+        return std::string{ "invalid" };
+    }
+}
+
 // ------------------------------------------------------------------------------------------------
 PLY::EDataType PLY::Property::ParseDataType(std::vector<char> &buffer) {
     ai_assert(!buffer.empty());
@@ -281,6 +300,8 @@ bool PLY::Element::ParseElement(IOStreamBuffer<char> &streamBuffer, std::vector<
         // if the exact semantic can't be determined, just store
         // the original string identifier
         pOut->szName = std::string(&buffer[0], &buffer[0] + strlen(&buffer[0]));
+        auto pos = pOut->szName.find_last_of(' ');
+        pOut->szName.erase(pos, pOut->szName.size());
     }
 
     if (!PLY::DOM::SkipSpaces(buffer))
@@ -413,6 +434,7 @@ bool PLY::DOM::SkipComments(std::vector<char> buffer) {
 bool PLY::DOM::ParseHeader(IOStreamBuffer<char> &streamBuffer, std::vector<char> &buffer, bool isBinary) {
     ASSIMP_LOG_VERBOSE_DEBUG("PLY::DOM::ParseHeader() begin");
 
+    std::unordered_set<std::string> definedAlElements;
     // parse all elements
     while (!buffer.empty()) {
         // skip all comments
@@ -421,6 +443,13 @@ bool PLY::DOM::ParseHeader(IOStreamBuffer<char> &streamBuffer, std::vector<char>
         PLY::Element out;
         if (PLY::Element::ParseElement(streamBuffer, buffer, &out)) {
             // add the element to the list of elements
+
+            const auto propertyName = (out.szName.empty()) ? to_string(out.eSemantic) : out.szName;
+            auto alreadyDefined = definedAlElements.find(propertyName);
+            if (alreadyDefined != definedAlElements.end()) {
+                throw DeadlyImportError("Property '" + propertyName + "' in header already defined ");
+            }
+            definedAlElements.insert(propertyName);
             alElements.push_back(out);
         } else if (TokenMatch(buffer, "end_header", 10)) {
             // we have reached the end of the header

code/AssetLib/Q3BSP/Q3BSPFileImporter.cpp

@@ -588,7 +588,7 @@ bool Q3BSPFileImporter::importTextureFromArchive(const Q3BSP::Q3BSPModel *model,
 
             aiString name;
             name.data[0] = '*';
-            name.length = 1 + ASSIMP_itoa10(name.data + 1, static_cast<unsigned int>(MAXLEN - 1), static_cast<int32_t>(mTextures.size()));
+            name.length = 1 + ASSIMP_itoa10(name.data + 1, static_cast<unsigned int>(AI_MAXLEN - 1), static_cast<int32_t>(mTextures.size()));
 
             archive->Close(pTextureStream);
 
@@ -641,7 +641,7 @@ bool Q3BSPFileImporter::importLightmap(const Q3BSP::Q3BSPModel *pModel, aiScene
 
     aiString name;
     name.data[0] = '*';
-    name.length = 1 + ASSIMP_itoa10(name.data + 1, static_cast<unsigned int>(MAXLEN - 1), static_cast<int32_t>(mTextures.size()));
+    name.length = 1 + ASSIMP_itoa10(name.data + 1, static_cast<unsigned int>(AI_MAXLEN - 1), static_cast<int32_t>(mTextures.size()));
 
     pMatHelper->AddProperty(&name, AI_MATKEY_TEXTURE_LIGHTMAP(1));
     mTextures.push_back(pTexture);

code/AssetLib/Q3D/Q3DLoader.cpp

@@ -250,7 +250,7 @@ void Q3DImporter::InternReadFile(const std::string &pFile,
                 c = stream.GetI1();
                 while (c) {
                     mat.name.data[mat.name.length++] = c;
-                    if (mat.name.length == MAXLEN) {
+                    if (mat.name.length == AI_MAXLEN) {
                         ASSIMP_LOG_ERROR("String ouverflow detected, skipped material name parsing.");
                         break;
                     }

code/AssetLib/SMD/SMDLoader.cpp

@@ -400,8 +400,12 @@ void SMDImporter::AddBoneChildren(aiNode* pcNode, uint32_t iParent) {
         }
     }
 
+    // nothing to do
+    if (pcNode->mNumChildren == 0)
+        return;
+
     // now allocate the output array
-    pcNode->mChildren = new aiNode*[pcNode->mNumChildren];
+    pcNode->mChildren = new aiNode *[pcNode->mNumChildren];
 
     // and fill all subnodes
     unsigned int qq( 0 );
@@ -589,12 +593,12 @@ void SMDImporter::CreateOutputMaterials() {
         pScene->mMaterials[iMat] = pcMat;
 
         aiString szName;
-        szName.length = static_cast<ai_uint32>(ai_snprintf(szName.data,MAXLEN,"Texture_%u",iMat));
+        szName.length = static_cast<ai_uint32>(ai_snprintf(szName.data, AI_MAXLEN, "Texture_%u", iMat));
         pcMat->AddProperty(&szName,AI_MATKEY_NAME);
 
         if (aszTextures[iMat].length())
         {
-            ::strncpy(szName.data, aszTextures[iMat].c_str(),MAXLEN-1);
+            ::strncpy(szName.data, aszTextures[iMat].c_str(), AI_MAXLEN - 1);
             szName.length = static_cast<ai_uint32>( aszTextures[iMat].length() );
             pcMat->AddProperty(&szName,AI_MATKEY_TEXTURE_DIFFUSE(0));
         }

code/AssetLib/STL/STLLoader.cpp

@@ -181,7 +181,7 @@ void STLImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
     mBuffer = &buffer2[0];
 
     // the default vertex color is light gray.
-    mClrColorDefault.r = mClrColorDefault.g = mClrColorDefault.b = mClrColorDefault.a = (ai_real)0.6;
+    mClrColorDefault.r = mClrColorDefault.g = mClrColorDefault.b = mClrColorDefault.a = 0.6f;
 
     // allocate a single node
     mScene->mRootNode = new aiNode();
@@ -209,7 +209,7 @@ void STLImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
     }
     pcMat->AddProperty(&clrDiffuse, 1, AI_MATKEY_COLOR_DIFFUSE);
     pcMat->AddProperty(&clrDiffuse, 1, AI_MATKEY_COLOR_SPECULAR);
-    clrDiffuse = aiColor4D(ai_real(0.05), ai_real(0.05), ai_real(0.05), ai_real(1.0));
+    clrDiffuse = aiColor4D(0.05f, 0.05f, 0.05f, 1.0f);
     pcMat->AddProperty(&clrDiffuse, 1, AI_MATKEY_COLOR_AMBIENT);
 
     mScene->mNumMaterials = 1;
@@ -257,7 +257,7 @@ void STLImporter::LoadASCIIFile(aiNode *root) {
         size_t temp = (size_t)(sz - szMe);
         // setup the name of the node
         if (temp) {
-            if (temp >= MAXLEN) {
+            if (temp >= AI_MAXLEN) {
                 throw DeadlyImportError("STL: Node name too long");
             }
             std::string name(szMe, temp);

code/AssetLib/Step/STEPFile.h

@@ -82,8 +82,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 // this is intended as stress test - by default, entities are evaluated
 // lazily and therefore not unless needed.
 
-//#define ASSIMP_IFC_TEST
-
 namespace Assimp {
 
 // ********************************************************************************
@@ -531,6 +529,7 @@ public:
 
     template <typename T>
     const T &To() const {
+
         return dynamic_cast<const T &>(**this);
     }
 
@@ -581,12 +580,12 @@ private:
 };
 
 template <typename T>
-inline bool operator==(const std::shared_ptr<LazyObject> &lo, T whatever) {
+inline bool operator == (const std::shared_ptr<LazyObject> &lo, T whatever) {
     return *lo == whatever; // XXX use std::forward if we have 0x
 }
 
 template <typename T>
-inline bool operator==(const std::pair<uint64_t, std::shared_ptr<LazyObject>> &lo, T whatever) {
+inline bool operator == (const std::pair<uint64_t, std::shared_ptr<LazyObject>> &lo, T whatever) {
     return *(lo.second) == whatever; // XXX use std::forward if we have 0x
 }
 
@@ -599,18 +598,30 @@ struct Lazy {
     Lazy(const LazyObject *obj = nullptr) : obj(obj) {}
 
     operator const T *() const {
+        if (obj == nullptr) {
+            throw TypeError("Obj type is nullptr.");
+        }
         return obj->ToPtr<T>();
     }
 
     operator const T &() const {
+        if (obj == nullptr) {
+            throw TypeError("Obj type is nullptr.");
+        }
         return obj->To<T>();
     }
 
     const T &operator*() const {
+        if (obj == nullptr) {
+            throw TypeError("Obj type is nullptr.");
+        }
         return obj->To<T>();
     }
 
     const T *operator->() const {
+        if (obj == nullptr) {
+            throw TypeError("Obj type is nullptr.");
+        }
         return &obj->To<T>();
     }
 

code/AssetLib/Step/StepExporter.cpp

@@ -4,7 +4,6 @@ Open Asset Import Library (assimp)
 
 Copyright (c) 2006-2024, assimp team
 
-
 All rights reserved.
 
 Redistribution and use of this software in source and binary forms,
@@ -37,11 +36,9 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 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.
 
-@author: Richard Steffen, 2015
 ----------------------------------------------------------------------
 */
 
-
 #ifndef ASSIMP_BUILD_NO_EXPORT
 #ifndef ASSIMP_BUILD_NO_STEP_EXPORTER
 

code/AssetLib/USD/USDLoader.cpp

@@ -0,0 +1,124 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2024, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 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.
+----------------------------------------------------------------------
+*/
+
+/** @file  USDLoader.cpp
+ *  @brief Implementation of the USD importer class
+ */
+
+#ifndef ASSIMP_BUILD_NO_USD_IMPORTER
+#include <memory>
+
+// internal headers
+#include <assimp/ai_assert.h>
+#include <assimp/anim.h>
+#include <assimp/DefaultIOSystem.h>
+#include <assimp/DefaultLogger.hpp>
+#include <assimp/fast_atof.h>
+#include <assimp/Importer.hpp>
+#include <assimp/importerdesc.h>
+#include <assimp/IOStreamBuffer.h>
+#include <assimp/IOSystem.hpp>
+#include <assimp/scene.h>
+#include <assimp/StringUtils.h>
+#include <assimp/StreamReader.h>
+
+#include "USDLoader.h"
+#include "USDLoaderUtil.h"
+#include "USDPreprocessor.h"
+
+static constexpr aiImporterDesc desc = {
+    "USD Object Importer",
+    "",
+    "",
+    "https://en.wikipedia.org/wiki/Universal_Scene_Description/",
+    aiImporterFlags_SupportTextFlavour | aiImporterFlags_SupportBinaryFlavour,
+    0,
+    0,
+    0,
+    0,
+    "usd usda usdc usdz"
+};
+
+namespace Assimp {
+using namespace std;
+
+// Constructor to be privately used by Importer
+USDImporter::USDImporter() :
+    impl(USDImporterImplTinyusdz()) {
+}
+
+// ------------------------------------------------------------------------------------------------
+
+bool USDImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool) const {
+    // Based on token
+    static const uint32_t usdcTokens[] = { AI_MAKE_MAGIC("PXR-USDC") };
+    bool canRead = CheckMagicToken(pIOHandler, pFile, usdcTokens, AI_COUNT_OF(usdcTokens));
+    if (canRead) {
+        return canRead;
+    }
+
+    // Based on extension
+    // TODO: confirm OK to replace this w/SimpleExtensionCheck() below
+    canRead = isUsd(pFile) || isUsda(pFile) || isUsdc(pFile) || isUsdz(pFile);
+    if (canRead) {
+        return canRead;
+    }
+    canRead = SimpleExtensionCheck(pFile, "usd", "usda", "usdc", "usdz");
+    return canRead;
+}
+
+const aiImporterDesc *USDImporter::GetInfo() const {
+    return &desc;
+}
+
+void USDImporter::InternReadFile(
+        const std::string &pFile,
+        aiScene *pScene,
+        IOSystem *pIOHandler) {
+    impl.InternReadFile(
+            pFile,
+            pScene,
+            pIOHandler);
+}
+
+} // namespace Assimp
+
+#endif // !! ASSIMP_BUILD_NO_USD_IMPORTER
+

code/AssetLib/USD/USDLoader.h

@@ -0,0 +1,78 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2024, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 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.
+----------------------------------------------------------------------
+*/
+
+/** @file  USDLoader.h
+ *  @brief Declaration of the USD importer class.
+ */
+#pragma once
+#ifndef AI_USDLOADER_H_INCLUDED
+#define AI_USDLOADER_H_INCLUDED
+
+#include <assimp/BaseImporter.h>
+#include <assimp/types.h>
+#include <vector>
+#include <cstdint>
+
+#include "USDLoaderImplTinyusdz.h"
+
+namespace Assimp {
+class USDImporter : public BaseImporter {
+public:
+    USDImporter();
+    ~USDImporter() override = default;
+
+    /// \brief  Returns whether the class can handle the format of the given file.
+    /// \remark See BaseImporter::CanRead() for details.
+    bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const override;
+
+protected:
+    //! \brief  Appends the supported extension.
+    const aiImporterDesc *GetInfo() const override;
+
+    void InternReadFile(
+            const std::string &pFile,
+            aiScene *pScene,
+            IOSystem *pIOHandler) override;
+private:
+    USDImporterImplTinyusdz impl;
+};
+
+} // namespace Assimp
+#endif // AI_USDLOADER_H_INCLUDED

code/AssetLib/USD/USDLoaderImplTinyusdz.cpp

@@ -0,0 +1,749 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2024, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 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.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  USDLoader.cpp
+ *  @brief Implementation of the USD importer class
+ */
+
+#ifndef ASSIMP_BUILD_NO_USD_IMPORTER
+#include <memory>
+#include <sstream>
+
+// internal headers
+#include <assimp/ai_assert.h>
+#include <assimp/anim.h>
+#include <assimp/CreateAnimMesh.h>
+#include <assimp/DefaultIOSystem.h>
+#include <assimp/DefaultLogger.hpp>
+#include <assimp/fast_atof.h>
+#include <assimp/Importer.hpp>
+#include <assimp/importerdesc.h>
+#include <assimp/IOStreamBuffer.h>
+#include <assimp/IOSystem.hpp>
+#include <assimp/StringUtils.h>
+#include <assimp/StreamReader.h>
+
+#include "io-util.hh" // namespace tinyusdz::io
+#include "tydra/scene-access.hh"
+#include "tydra/shader-network.hh"
+#include "USDLoaderImplTinyusdzHelper.h"
+#include "USDLoaderImplTinyusdz.h"
+#include "USDLoaderUtil.h"
+#include "USDPreprocessor.h"
+
+#include "../../../contrib/tinyusdz/assimp_tinyusdz_logging.inc"
+
+namespace {
+    static constexpr char TAG[] = "tinyusdz loader";
+}
+
+namespace Assimp {
+using namespace std;
+
+void USDImporterImplTinyusdz::InternReadFile(
+        const std::string &pFile,
+        aiScene *pScene,
+        IOSystem *) {
+    // Grab filename for logging purposes
+    size_t pos = pFile.find_last_of('/');
+    string basePath = pFile.substr(0, pos);
+    string nameWExt = pFile.substr(pos + 1);
+    stringstream ss;
+    ss.str("");
+    ss << "InternReadFile(): model" << nameWExt;
+    TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+
+    bool ret{ false };
+    tinyusdz::USDLoadOptions options;
+    tinyusdz::Stage stage;
+    std::string warn, err;
+    bool is_usdz{ false };
+    if (isUsdc(pFile)) {
+        ret = LoadUSDCFromFile(pFile, &stage, &warn, &err, options);
+        ss.str("");
+        ss << "InternReadFile(): LoadUSDCFromFile() result: " << ret;
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    } else if (isUsda(pFile)) {
+        ret = LoadUSDAFromFile(pFile, &stage, &warn, &err, options);
+        ss.str("");
+        ss << "InternReadFile(): LoadUSDAFromFile() result: " << ret;
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    } else if (isUsdz(pFile)) {
+        ret = LoadUSDZFromFile(pFile, &stage, &warn, &err, options);
+        is_usdz = true;
+        ss.str("");
+        ss << "InternReadFile(): LoadUSDZFromFile() result: " << ret;
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    } else if (isUsd(pFile)) {
+        ret = LoadUSDFromFile(pFile, &stage, &warn, &err, options);
+        ss.str("");
+        ss << "InternReadFile(): LoadUSDFromFile() result: " << ret;
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    }
+    if (warn.empty() && err.empty()) {
+        ss.str("");
+        ss << "InternReadFile(): load free of warnings/errors";
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    } else {
+        if (!warn.empty()) {
+            ss.str("");
+            ss << "InternReadFile(): WARNING reported: " << warn;
+            TINYUSDZLOGW(TAG, "%s", ss.str().c_str());
+        }
+        if (!err.empty()) {
+            ss.str("");
+            ss << "InternReadFile(): ERROR reported: " << err;
+            TINYUSDZLOGE(TAG, "%s", ss.str().c_str());
+        }
+    }
+    if (!ret) {
+        ss.str("");
+        ss << "InternReadFile(): ERROR: load failed! ret: " << ret;
+        TINYUSDZLOGE(TAG, "%s", ss.str().c_str());
+        return;
+    }
+    tinyusdz::tydra::RenderScene render_scene;
+    tinyusdz::tydra::RenderSceneConverter converter;
+    tinyusdz::tydra::RenderSceneConverterEnv env(stage);
+    std::string usd_basedir = tinyusdz::io::GetBaseDir(pFile);
+    env.set_search_paths({ usd_basedir }); // {} needed to convert to vector of char
+
+    // NOTE: Pointer address of usdz_asset must be valid until the call of RenderSceneConverter::ConvertToRenderScene.
+    tinyusdz::USDZAsset usdz_asset;
+    if (is_usdz) {
+        if (!tinyusdz::ReadUSDZAssetInfoFromFile(pFile, &usdz_asset, &warn, &err)) {
+            if (!warn.empty()) {
+                ss.str("");
+                ss << "InternReadFile(): ReadUSDZAssetInfoFromFile: WARNING reported: " << warn;
+                TINYUSDZLOGW(TAG, "%s", ss.str().c_str());
+            }
+            if (!err.empty()) {
+                ss.str("");
+                ss << "InternReadFile(): ReadUSDZAssetInfoFromFile: ERROR reported: " << err;
+                TINYUSDZLOGE(TAG, "%s", ss.str().c_str());
+            }
+            ss.str("");
+            ss << "InternReadFile(): ReadUSDZAssetInfoFromFile: ERROR!";
+            TINYUSDZLOGE(TAG, "%s", ss.str().c_str());
+        } else {
+            ss.str("");
+            ss << "InternReadFile(): ReadUSDZAssetInfoFromFile: OK";
+            TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+        }
+
+        tinyusdz::AssetResolutionResolver arr;
+        if (!tinyusdz::SetupUSDZAssetResolution(arr, &usdz_asset)) {
+            ss.str("");
+            ss << "InternReadFile(): SetupUSDZAssetResolution: ERROR: load failed! ret: " << ret;
+            TINYUSDZLOGE(TAG, "%s", ss.str().c_str());
+        } else {
+            ss.str("");
+            ss << "InternReadFile(): SetupUSDZAssetResolution: OK";
+            TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+            env.asset_resolver = arr;
+        }
+    }
+
+    ret = converter.ConvertToRenderScene(env, &render_scene);
+    if (!ret) {
+        ss.str("");
+        ss << "InternReadFile(): ConvertToRenderScene() failed!";
+        TINYUSDZLOGE(TAG, "%s", ss.str().c_str());
+        return;
+    }
+
+//    sanityCheckNodesRecursive(pScene->mRootNode);
+    meshes(render_scene, pScene, nameWExt);
+    materials(render_scene, pScene, nameWExt);
+    textures(render_scene, pScene, nameWExt);
+    textureImages(render_scene, pScene, nameWExt);
+    buffers(render_scene, pScene, nameWExt);
+
+    std::map<size_t, tinyusdz::tydra::Node> meshNodes;
+    setupNodes(render_scene, pScene, meshNodes, nameWExt);
+
+    setupBlendShapes(render_scene, pScene, nameWExt);
+}
+
+void USDImporterImplTinyusdz::meshes(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        aiScene *pScene,
+        const std::string &nameWExt) {
+    stringstream ss;
+    pScene->mNumMeshes = static_cast<unsigned int>(render_scene.meshes.size());
+    pScene->mMeshes = new aiMesh *[pScene->mNumMeshes]();
+    ss.str("");
+    ss << "meshes(): pScene->mNumMeshes: " << pScene->mNumMeshes;
+    TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+
+    // Export meshes
+    for (size_t meshIdx = 0; meshIdx < pScene->mNumMeshes; meshIdx++) {
+        pScene->mMeshes[meshIdx] = new aiMesh();
+        pScene->mMeshes[meshIdx]->mName.Set(render_scene.meshes[meshIdx].prim_name);
+        ss.str("");
+        ss << "   mesh[" << meshIdx << "]: " <<
+                render_scene.meshes[meshIdx].joint_and_weights.jointIndices.size() << " jointIndices, " <<
+                render_scene.meshes[meshIdx].joint_and_weights.jointWeights.size() << " jointWeights, elementSize: " <<
+                render_scene.meshes[meshIdx].joint_and_weights.elementSize;
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+        ss.str("");
+        ss << "        skel_id: " << render_scene.meshes[meshIdx].skel_id;
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+        if (render_scene.meshes[meshIdx].material_id > -1) {
+            pScene->mMeshes[meshIdx]->mMaterialIndex = render_scene.meshes[meshIdx].material_id;
+        }
+        verticesForMesh(render_scene, pScene, meshIdx, nameWExt);
+        facesForMesh(render_scene, pScene, meshIdx, nameWExt);
+        // Some models infer normals from faces, but others need them e.g.
+        //   - apple "toy car" canopy normals will be wrong
+        //   - human "untitled" model (tinyusdz issue #115) will be "splotchy"
+        normalsForMesh(render_scene, pScene, meshIdx, nameWExt);
+        materialsForMesh(render_scene, pScene, meshIdx, nameWExt);
+        uvsForMesh(render_scene, pScene, meshIdx, nameWExt);
+    }
+}
+
+void USDImporterImplTinyusdz::verticesForMesh(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        aiScene *pScene,
+        size_t meshIdx,
+        const std::string &nameWExt) {
+    UNUSED(nameWExt);
+    pScene->mMeshes[meshIdx]->mNumVertices = static_cast<unsigned int>(render_scene.meshes[meshIdx].points.size());
+    pScene->mMeshes[meshIdx]->mVertices = new aiVector3D[pScene->mMeshes[meshIdx]->mNumVertices];
+    for (size_t j = 0; j < pScene->mMeshes[meshIdx]->mNumVertices; ++j) {
+        pScene->mMeshes[meshIdx]->mVertices[j].x = render_scene.meshes[meshIdx].points[j][0];
+        pScene->mMeshes[meshIdx]->mVertices[j].y = render_scene.meshes[meshIdx].points[j][1];
+        pScene->mMeshes[meshIdx]->mVertices[j].z = render_scene.meshes[meshIdx].points[j][2];
+    }
+}
+
+void USDImporterImplTinyusdz::facesForMesh(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        aiScene *pScene,
+        size_t meshIdx,
+        const std::string &nameWExt) {
+    UNUSED(nameWExt);
+    pScene->mMeshes[meshIdx]->mNumFaces = static_cast<unsigned int>(render_scene.meshes[meshIdx].faceVertexCounts().size());
+    pScene->mMeshes[meshIdx]->mFaces = new aiFace[pScene->mMeshes[meshIdx]->mNumFaces]();
+    size_t faceVertIdxOffset = 0;
+    for (size_t faceIdx = 0; faceIdx < pScene->mMeshes[meshIdx]->mNumFaces; ++faceIdx) {
+        pScene->mMeshes[meshIdx]->mFaces[faceIdx].mNumIndices = render_scene.meshes[meshIdx].faceVertexCounts()[faceIdx];
+        pScene->mMeshes[meshIdx]->mFaces[faceIdx].mIndices = new unsigned int[pScene->mMeshes[meshIdx]->mFaces[faceIdx].mNumIndices];
+        for (size_t j = 0; j < pScene->mMeshes[meshIdx]->mFaces[faceIdx].mNumIndices; ++j) {
+            pScene->mMeshes[meshIdx]->mFaces[faceIdx].mIndices[j] =
+                    render_scene.meshes[meshIdx].faceVertexIndices()[j + faceVertIdxOffset];
+        }
+        faceVertIdxOffset += pScene->mMeshes[meshIdx]->mFaces[faceIdx].mNumIndices;
+    }
+}
+
+void USDImporterImplTinyusdz::normalsForMesh(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        aiScene *pScene,
+        size_t meshIdx,
+        const std::string &nameWExt) {
+    UNUSED(nameWExt);
+    pScene->mMeshes[meshIdx]->mNormals = new aiVector3D[pScene->mMeshes[meshIdx]->mNumVertices];
+    const float *floatPtr = reinterpret_cast<const float *>(render_scene.meshes[meshIdx].normals.get_data().data());
+    for (size_t vertIdx = 0, fpj = 0; vertIdx < pScene->mMeshes[meshIdx]->mNumVertices; ++vertIdx, fpj += 3) {
+        pScene->mMeshes[meshIdx]->mNormals[vertIdx].x = floatPtr[fpj];
+        pScene->mMeshes[meshIdx]->mNormals[vertIdx].y = floatPtr[fpj + 1];
+        pScene->mMeshes[meshIdx]->mNormals[vertIdx].z = floatPtr[fpj + 2];
+    }
+}
+
+void USDImporterImplTinyusdz::materialsForMesh(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        aiScene *pScene,
+        size_t meshIdx,
+        const std::string &nameWExt) {
+    UNUSED(render_scene); UNUSED(pScene); UNUSED(meshIdx); UNUSED(nameWExt);
+}
+
+void USDImporterImplTinyusdz::uvsForMesh(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        aiScene *pScene,
+        size_t meshIdx,
+        const std::string &nameWExt) {
+    UNUSED(nameWExt);
+    const size_t uvSlotsCount = render_scene.meshes[meshIdx].texcoords.size();
+    if (uvSlotsCount < 1) {
+        return;
+    }
+    pScene->mMeshes[meshIdx]->mTextureCoords[0] = new aiVector3D[pScene->mMeshes[meshIdx]->mNumVertices];
+    pScene->mMeshes[meshIdx]->mNumUVComponents[0] = 2; // U and V stored in "x", "y" of aiVector3D.
+    for (unsigned int uvSlotIdx = 0; uvSlotIdx < uvSlotsCount; ++uvSlotIdx) {
+        const auto uvsForSlot = render_scene.meshes[meshIdx].texcoords.at(uvSlotIdx);
+        if (uvsForSlot.get_data().size() == 0) {
+            continue;
+        }
+        const float *floatPtr = reinterpret_cast<const float *>(uvsForSlot.get_data().data());
+        for (size_t vertIdx = 0, fpj = 0; vertIdx < pScene->mMeshes[meshIdx]->mNumVertices; ++vertIdx, fpj += 2) {
+            pScene->mMeshes[meshIdx]->mTextureCoords[uvSlotIdx][vertIdx].x = floatPtr[fpj];
+            pScene->mMeshes[meshIdx]->mTextureCoords[uvSlotIdx][vertIdx].y = floatPtr[fpj + 1];
+        }
+    }
+}
+
+static aiColor3D *ownedColorPtrFor(const std::array<float, 3> &color) {
+    aiColor3D *colorPtr = new aiColor3D();
+    colorPtr->r = color[0];
+    colorPtr->g = color[1];
+    colorPtr->b = color[2];
+    return colorPtr;
+}
+
+static std::string nameForTextureWithId(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        const int targetId) {
+    stringstream ss;
+    std::string texName;
+    for (const auto &image : render_scene.images) {
+        if (image.buffer_id == targetId) {
+            texName = image.asset_identifier;
+            ss.str("");
+            ss << "nameForTextureWithId(): found texture " << texName << " with target id " << targetId;
+            TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+            break;
+        }
+    }
+    ss.str("");
+    ss << "nameForTextureWithId(): ERROR!  Failed to find texture with target id " << targetId;
+    TINYUSDZLOGE(TAG, "%s", ss.str().c_str());
+    return texName;
+}
+
+static void assignTexture(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        const tinyusdz::tydra::RenderMaterial &material,
+        aiMaterial *mat,
+        const int textureId,
+        const int aiTextureType) {
+    UNUSED(material);
+    std::string name = nameForTextureWithId(render_scene, textureId);
+    aiString *texName = new aiString();
+    texName->Set(name);
+    stringstream ss;
+    ss.str("");
+    ss << "assignTexture(): name: " << name;
+    TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    // TODO: verify hard-coded '0' index is correct
+    mat->AddProperty(texName, _AI_MATKEY_TEXTURE_BASE, aiTextureType, 0);
+}
+
+void USDImporterImplTinyusdz::materials(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        aiScene *pScene,
+        const std::string &nameWExt) {
+    const size_t numMaterials{render_scene.materials.size()};
+    (void) numMaterials; // Ignore unused variable when -Werror enabled
+    stringstream ss;
+    ss.str("");
+    ss << "materials(): model" << nameWExt << ", numMaterials: " << numMaterials;
+    TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    pScene->mNumMaterials = 0;
+    if (render_scene.materials.empty()) {
+        return;
+    }
+    pScene->mMaterials = new aiMaterial *[render_scene.materials.size()];
+    for (const auto &material : render_scene.materials) {
+        ss.str("");
+        ss << "    material[" << pScene->mNumMaterials << "]: name: |" << material.name << "|, disp name: |" << material.display_name << "|";
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+        aiMaterial *mat = new aiMaterial;
+
+        aiString *materialName = new aiString();
+        materialName->Set(material.name);
+        mat->AddProperty(materialName, AI_MATKEY_NAME);
+
+        mat->AddProperty(
+                ownedColorPtrFor(material.surfaceShader.diffuseColor.value),
+                1, AI_MATKEY_COLOR_DIFFUSE);
+        mat->AddProperty(
+                ownedColorPtrFor(material.surfaceShader.specularColor.value),
+                1, AI_MATKEY_COLOR_SPECULAR);
+        mat->AddProperty(
+                ownedColorPtrFor(material.surfaceShader.emissiveColor.value),
+                1, AI_MATKEY_COLOR_EMISSIVE);
+
+        ss.str("");
+        if (material.surfaceShader.diffuseColor.is_texture()) {
+            assignTexture(render_scene, material, mat, material.surfaceShader.diffuseColor.texture_id, aiTextureType_DIFFUSE);
+            ss << "    material[" << pScene->mNumMaterials << "]: diff tex id " << material.surfaceShader.diffuseColor.texture_id << "\n";
+        }
+        if (material.surfaceShader.specularColor.is_texture()) {
+            assignTexture(render_scene, material, mat, material.surfaceShader.specularColor.texture_id, aiTextureType_SPECULAR);
+            ss << "    material[" << pScene->mNumMaterials << "]: spec tex id " << material.surfaceShader.specularColor.texture_id << "\n";
+        }
+        if (material.surfaceShader.normal.is_texture()) {
+            assignTexture(render_scene, material, mat, material.surfaceShader.normal.texture_id, aiTextureType_NORMALS);
+            ss << "    material[" << pScene->mNumMaterials << "]: normal tex id " << material.surfaceShader.normal.texture_id << "\n";
+        }
+        if (material.surfaceShader.emissiveColor.is_texture()) {
+            assignTexture(render_scene, material, mat, material.surfaceShader.emissiveColor.texture_id, aiTextureType_EMISSIVE);
+            ss << "    material[" << pScene->mNumMaterials << "]: emissive tex id " << material.surfaceShader.emissiveColor.texture_id << "\n";
+        }
+        if (material.surfaceShader.occlusion.is_texture()) {
+            assignTexture(render_scene, material, mat, material.surfaceShader.occlusion.texture_id, aiTextureType_LIGHTMAP);
+            ss << "    material[" << pScene->mNumMaterials << "]: lightmap (occlusion) tex id " << material.surfaceShader.occlusion.texture_id << "\n";
+        }
+        if (material.surfaceShader.metallic.is_texture()) {
+            assignTexture(render_scene, material, mat, material.surfaceShader.metallic.texture_id, aiTextureType_METALNESS);
+            ss << "    material[" << pScene->mNumMaterials << "]: metallic tex id " << material.surfaceShader.metallic.texture_id << "\n";
+        }
+        if (material.surfaceShader.roughness.is_texture()) {
+            assignTexture(render_scene, material, mat, material.surfaceShader.roughness.texture_id, aiTextureType_DIFFUSE_ROUGHNESS);
+            ss << "    material[" << pScene->mNumMaterials << "]: roughness tex id " << material.surfaceShader.roughness.texture_id << "\n";
+        }
+        if (material.surfaceShader.clearcoat.is_texture()) {
+            assignTexture(render_scene, material, mat, material.surfaceShader.clearcoat.texture_id, aiTextureType_CLEARCOAT);
+            ss << "    material[" << pScene->mNumMaterials << "]: clearcoat tex id " << material.surfaceShader.clearcoat.texture_id << "\n";
+        }
+        if (material.surfaceShader.opacity.is_texture()) {
+            assignTexture(render_scene, material, mat, material.surfaceShader.opacity.texture_id, aiTextureType_OPACITY);
+            ss << "    material[" << pScene->mNumMaterials << "]: opacity tex id " << material.surfaceShader.opacity.texture_id << "\n";
+        }
+        if (material.surfaceShader.displacement.is_texture()) {
+            assignTexture(render_scene, material, mat, material.surfaceShader.displacement.texture_id, aiTextureType_DISPLACEMENT);
+            ss << "    material[" << pScene->mNumMaterials << "]: displacement tex id " << material.surfaceShader.displacement.texture_id << "\n";
+        }
+        if (material.surfaceShader.clearcoatRoughness.is_texture()) {
+            ss << "    material[" << pScene->mNumMaterials << "]: clearcoatRoughness tex id " << material.surfaceShader.clearcoatRoughness.texture_id << "\n";
+        }
+        if (material.surfaceShader.opacityThreshold.is_texture()) {
+            ss << "    material[" << pScene->mNumMaterials << "]: opacityThreshold tex id " << material.surfaceShader.opacityThreshold.texture_id << "\n";
+        }
+        if (material.surfaceShader.ior.is_texture()) {
+            ss << "    material[" << pScene->mNumMaterials << "]: ior tex id " << material.surfaceShader.ior.texture_id << "\n";
+        }
+        if (!ss.str().empty()) {
+            TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+        }
+
+        pScene->mMaterials[pScene->mNumMaterials] = mat;
+        ++pScene->mNumMaterials;
+    }
+}
+
+void USDImporterImplTinyusdz::textures(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        aiScene *pScene,
+        const std::string &nameWExt) {
+    UNUSED(pScene);
+    const size_t numTextures{render_scene.textures.size()};
+    UNUSED(numTextures); // Ignore unused variable when -Werror enabled
+    stringstream ss;
+    ss.str("");
+    ss << "textures(): model" << nameWExt << ", numTextures: " << numTextures;
+    TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    size_t i{0};
+    UNUSED(i);
+    for (const auto &texture : render_scene.textures) {
+        UNUSED(texture);
+        ss.str("");
+        ss << "    texture[" << i << "]: id: " << texture.texture_image_id << ", disp name: |" << texture.display_name << "|, varname_uv: " <<
+                texture.varname_uv << ", prim_name: |" << texture.prim_name << "|, abs_path: |" << texture.abs_path << "|";
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+        ++i;
+    }
+}
+
+/**
+ * "owned" as in, used "new" to allocate and aiScene now responsible for "delete"
+ *
+ * @param render_scene  renderScene object
+ * @param image         textureImage object
+ * @param nameWExt      filename w/ext (use to extract file type hint)
+ * @return              aiTexture ptr
+ */
+static aiTexture *ownedEmbeddedTextureFor(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        const tinyusdz::tydra::TextureImage &image,
+        const std::string &nameWExt) {
+    UNUSED(nameWExt);
+    stringstream ss;
+    aiTexture *tex = new aiTexture();
+    size_t pos = image.asset_identifier.find_last_of('/');
+    string embTexName{image.asset_identifier.substr(pos + 1)};
+    tex->mFilename.Set(image.asset_identifier.c_str());
+    tex->mHeight = image.height;
+//    const size_t imageBytesCount{render_scene.buffers[image.buffer_id].data.size() / image.channels};
+    tex->mWidth = image.width;
+    if (tex->mHeight == 0) {
+        pos = embTexName.find_last_of('.');
+        strncpy(tex->achFormatHint, embTexName.substr(pos + 1).c_str(), 3);
+        const size_t imageBytesCount{render_scene.buffers[image.buffer_id].data.size()};
+        tex->pcData = (aiTexel *) new char[imageBytesCount];
+        memcpy(tex->pcData, &render_scene.buffers[image.buffer_id].data[0], imageBytesCount);
+    } else {
+        string formatHint{"rgba8888"};
+        strncpy(tex->achFormatHint, formatHint.c_str(), 8);
+        const size_t imageTexelsCount{tex->mWidth * tex->mHeight};
+        tex->pcData = (aiTexel *) new char[imageTexelsCount * image.channels];
+        const float *floatPtr = reinterpret_cast<const float *>(&render_scene.buffers[image.buffer_id].data[0]);
+        ss.str("");
+        ss << "ownedEmbeddedTextureFor(): manual fill...";
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+        for (size_t i = 0, fpi = 0; i < imageTexelsCount; ++i, fpi += 4) {
+            tex->pcData[i].b = static_cast<uint8_t>(floatPtr[fpi]     * 255);
+            tex->pcData[i].g = static_cast<uint8_t>(floatPtr[fpi + 1] * 255);
+            tex->pcData[i].r = static_cast<uint8_t>(floatPtr[fpi + 2] * 255);
+            tex->pcData[i].a = static_cast<uint8_t>(floatPtr[fpi + 3] * 255);
+        }
+        ss.str("");
+        ss << "ownedEmbeddedTextureFor(): imageTexelsCount: " << imageTexelsCount << ", channels: " << image.channels;
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    }
+    return tex;
+}
+
+void USDImporterImplTinyusdz::textureImages(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        aiScene *pScene,
+        const std::string &nameWExt) {
+    stringstream ss;
+    const size_t numTextureImages{render_scene.images.size()};
+    UNUSED(numTextureImages); // Ignore unused variable when -Werror enabled
+    ss.str("");
+    ss << "textureImages(): model" << nameWExt << ", numTextureImages: " << numTextureImages;
+    TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    pScene->mTextures = nullptr; // Need to iterate over images before knowing if valid textures available
+    pScene->mNumTextures = 0;
+    for (const auto &image : render_scene.images) {
+        ss.str("");
+        ss << "    image[" << pScene->mNumTextures << "]: |" << image.asset_identifier << "| w: " << image.width << ", h: " << image.height <<
+           ", channels: " << image.channels << ", miplevel: " << image.miplevel << ", buffer id: " << image.buffer_id << "\n" <<
+           "    buffers.size(): " << render_scene.buffers.size() << ", data empty? " << render_scene.buffers[image.buffer_id].data.empty();
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+        if (image.buffer_id > -1 &&
+            image.buffer_id < static_cast<long int>(render_scene.buffers.size()) &&
+            !render_scene.buffers[image.buffer_id].data.empty()) {
+            aiTexture *tex = ownedEmbeddedTextureFor(
+                    render_scene,
+                    image,
+                    nameWExt);
+            if (pScene->mTextures == nullptr) {
+                ss.str("");
+                ss << "    Init pScene->mTextures[" << render_scene.images.size() << "]";
+                TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+                pScene->mTextures = new aiTexture *[render_scene.images.size()];
+            }
+            ss.str("");
+            ss << "    pScene->mTextures[" << pScene->mNumTextures << "] name: |" << tex->mFilename.C_Str() <<
+                    "|, w: " << tex->mWidth << ", h: " << tex->mHeight << ", hint: " << tex->achFormatHint;
+            TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+            pScene->mTextures[pScene->mNumTextures++] = tex;
+        }
+    }
+}
+
+void USDImporterImplTinyusdz::buffers(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        aiScene *pScene,
+        const std::string &nameWExt) {
+    const size_t numBuffers{render_scene.buffers.size()};
+    UNUSED(pScene); UNUSED(numBuffers); // Ignore unused variable when -Werror enabled
+    stringstream ss;
+    ss.str("");
+    ss << "buffers(): model" << nameWExt << ", numBuffers: " << numBuffers;
+    TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    size_t i = 0;
+    for (const auto &buffer : render_scene.buffers) {
+        ss.str("");
+        ss << "    buffer[" << i << "]: count: " << buffer.data.size() << ", type: " << to_string(buffer.componentType);
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+        ++i;
+    }
+}
+
+void USDImporterImplTinyusdz::setupNodes(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        aiScene *pScene,
+        std::map<size_t, tinyusdz::tydra::Node> &meshNodes,
+        const std::string &nameWExt) {
+    stringstream ss;
+
+    pScene->mRootNode = nodes(render_scene, meshNodes, nameWExt);
+    pScene->mRootNode->mNumMeshes = pScene->mNumMeshes;
+    pScene->mRootNode->mMeshes = new unsigned int[pScene->mRootNode->mNumMeshes];
+    ss.str("");
+    ss << "setupNodes(): pScene->mNumMeshes: " << pScene->mNumMeshes;
+    if (pScene->mRootNode != nullptr) {
+        ss << ", mRootNode->mNumMeshes: " << pScene->mRootNode->mNumMeshes;
+    }
+    TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+
+    for (unsigned int meshIdx = 0; meshIdx < pScene->mNumMeshes; meshIdx++) {
+        pScene->mRootNode->mMeshes[meshIdx] = meshIdx;
+    }
+
+}
+
+aiNode *USDImporterImplTinyusdz::nodes(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        std::map<size_t, tinyusdz::tydra::Node> &meshNodes,
+        const std::string &nameWExt) {
+    const size_t numNodes{render_scene.nodes.size()};
+    (void) numNodes; // Ignore unused variable when -Werror enabled
+    stringstream ss;
+    ss.str("");
+    ss << "nodes(): model" << nameWExt << ", numNodes: " << numNodes;
+    TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    return nodesRecursive(nullptr, render_scene.nodes[0], meshNodes);
+}
+
+using Assimp::tinyusdzNodeTypeFor;
+using Assimp::tinyUsdzMat4ToAiMat4;
+using tinyusdz::tydra::NodeType;
+aiNode *USDImporterImplTinyusdz::nodesRecursive(
+        aiNode *pNodeParent,
+        const tinyusdz::tydra::Node &node,
+        std::map<size_t, tinyusdz::tydra::Node> &meshNodes) {
+    stringstream ss;
+    aiNode *cNode = new aiNode();
+    cNode->mParent = pNodeParent;
+    cNode->mName.Set(node.prim_name);
+    cNode->mTransformation = tinyUsdzMat4ToAiMat4(node.local_matrix.m);
+    ss.str("");
+    ss << "nodesRecursive(): node " << cNode->mName.C_Str() <<
+            " type: |" << tinyusdzNodeTypeFor(node.nodeType) <<
+            "|, disp " << node.display_name << ", abs " << node.abs_path;
+    if (cNode->mParent != nullptr) {
+        ss << " (parent " << cNode->mParent->mName.C_Str() << ")";
+    }
+    ss << " has " << node.children.size() << " children";
+    if (node.id > -1) {
+        ss << "\n    node mesh id: " << node.id << " (node type: " << tinyusdzNodeTypeFor(node.nodeType) << ")";
+        meshNodes[node.id] = node;
+    }
+    TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    if (!node.children.empty()) {
+        cNode->mNumChildren = static_cast<unsigned int>(node.children.size());
+        cNode->mChildren = new aiNode *[cNode->mNumChildren];
+    }
+
+    size_t i{0};
+    for (const auto &childNode: node.children) {
+        cNode->mChildren[i] = nodesRecursive(cNode, childNode, meshNodes);
+        ++i;
+    }
+    return cNode;
+}
+
+void USDImporterImplTinyusdz::sanityCheckNodesRecursive(
+        aiNode *cNode) {
+    stringstream ss;
+    ss.str("");
+    ss << "sanityCheckNodesRecursive(): node " << cNode->mName.C_Str();
+    if (cNode->mParent != nullptr) {
+        ss << " (parent " << cNode->mParent->mName.C_Str() << ")";
+    }
+    ss << " has " << cNode->mNumChildren << " children";
+    TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    for (size_t i = 0; i < cNode->mNumChildren; ++i) {
+        sanityCheckNodesRecursive(cNode->mChildren[i]);
+    }
+}
+
+void USDImporterImplTinyusdz::setupBlendShapes(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        aiScene *pScene,
+        const std::string &nameWExt) {
+    stringstream ss;
+    ss.str("");
+    ss << "setupBlendShapes(): iterating over " << pScene->mNumMeshes << " meshes for model" << nameWExt;
+    TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    for (size_t meshIdx = 0; meshIdx < pScene->mNumMeshes; meshIdx++) {
+         blendShapesForMesh(render_scene, pScene, meshIdx, nameWExt);
+    }
+}
+
+void USDImporterImplTinyusdz::blendShapesForMesh(
+        const tinyusdz::tydra::RenderScene &render_scene,
+        aiScene *pScene,
+        size_t meshIdx,
+        const std::string &nameWExt) {
+    UNUSED(nameWExt);
+    stringstream ss;
+    const unsigned int numBlendShapeTargets{static_cast<unsigned int>(render_scene.meshes[meshIdx].targets.size())};
+    UNUSED(numBlendShapeTargets); // Ignore unused variable when -Werror enabled
+    ss.str("");
+    ss << "    blendShapesForMesh(): mesh[" << meshIdx << "], numBlendShapeTargets: " << numBlendShapeTargets;
+    TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+    if (numBlendShapeTargets > 0) {
+        pScene->mMeshes[meshIdx]->mNumAnimMeshes = numBlendShapeTargets;
+        pScene->mMeshes[meshIdx]->mAnimMeshes = new aiAnimMesh *[pScene->mMeshes[meshIdx]->mNumAnimMeshes];
+    }
+    auto mapIter = render_scene.meshes[meshIdx].targets.begin();
+    size_t animMeshIdx{0};
+    for (; mapIter != render_scene.meshes[meshIdx].targets.end(); ++mapIter) {
+        const std::string name{mapIter->first};
+        const tinyusdz::tydra::ShapeTarget shapeTarget{mapIter->second};
+        pScene->mMeshes[meshIdx]->mAnimMeshes[animMeshIdx] = aiCreateAnimMesh(pScene->mMeshes[meshIdx]);
+        ss.str("");
+        ss << "        mAnimMeshes[" << animMeshIdx << "]: mNumVertices: " << pScene->mMeshes[meshIdx]->mAnimMeshes[animMeshIdx]->mNumVertices <<
+                ", target: " << shapeTarget.pointIndices.size() << " pointIndices, " << shapeTarget.pointOffsets.size() <<
+                " pointOffsets, " << shapeTarget.normalOffsets.size() << " normalOffsets";
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+        for (size_t iVert = 0; iVert < shapeTarget.pointOffsets.size(); ++iVert) {
+            pScene->mMeshes[meshIdx]->mAnimMeshes[animMeshIdx]->mVertices[shapeTarget.pointIndices[iVert]] +=
+                    tinyUsdzScaleOrPosToAssimp(shapeTarget.pointOffsets[iVert]);
+        }
+        for (size_t iVert = 0; iVert < shapeTarget.normalOffsets.size(); ++iVert) {
+            pScene->mMeshes[meshIdx]->mAnimMeshes[animMeshIdx]->mNormals[shapeTarget.pointIndices[iVert]] +=
+                    tinyUsdzScaleOrPosToAssimp(shapeTarget.normalOffsets[iVert]);
+        }
+        ss.str("");
+        ss << "        target[" << animMeshIdx << "]: name: " << name << ", prim_name: " <<
+                shapeTarget.prim_name << ", abs_path: " << shapeTarget.abs_path <<
+                ", display_name: " << shapeTarget.display_name << ", " << shapeTarget.pointIndices.size() <<
+                " pointIndices, " << shapeTarget.pointOffsets.size() << " pointOffsets, " <<
+                shapeTarget.normalOffsets.size() << " normalOffsets, " << shapeTarget.inbetweens.size() <<
+                " inbetweens";
+        TINYUSDZLOGD(TAG, "%s", ss.str().c_str());
+        ++animMeshIdx;
+    }
+}
+
+} // namespace Assimp
+
+#endif // !! ASSIMP_BUILD_NO_USD_IMPORTER

code/AssetLib/USD/USDLoaderImplTinyusdz.h

@@ -0,0 +1,155 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2024, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 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.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  USDLoader.h
+ *  @brief Declaration of the USD importer class.
+ */
+#pragma once
+#ifndef AI_USDLOADER_IMPL_TINYUSDZ_H_INCLUDED
+#define AI_USDLOADER_IMPL_TINYUSDZ_H_INCLUDED
+
+#include <assimp/BaseImporter.h>
+#include <assimp/scene.h>
+#include <assimp/types.h>
+#include <vector>
+#include <cstdint>
+#include "tinyusdz.hh"
+#include "tydra/render-data.hh"
+
+namespace Assimp {
+class USDImporterImplTinyusdz {
+public:
+    USDImporterImplTinyusdz() = default;
+    ~USDImporterImplTinyusdz() = default;
+
+    void InternReadFile(
+            const std::string &pFile,
+            aiScene *pScene,
+            IOSystem *pIOHandler);
+
+    void meshes(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            aiScene *pScene,
+            const std::string &nameWExt);
+
+    void verticesForMesh(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            aiScene *pScene,
+            size_t meshIdx,
+            const std::string &nameWExt);
+
+    void facesForMesh(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            aiScene *pScene,
+            size_t meshIdx,
+            const std::string &nameWExt);
+
+    void normalsForMesh(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            aiScene *pScene,
+            size_t meshIdx,
+            const std::string &nameWExt);
+
+    void materialsForMesh(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            aiScene *pScene,
+            size_t meshIdx,
+            const std::string &nameWExt);
+
+    void uvsForMesh(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            aiScene *pScene,
+            size_t meshIdx,
+            const std::string &nameWExt);
+
+    void materials(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            aiScene *pScene,
+            const std::string &nameWExt);
+
+    void textures(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            aiScene *pScene,
+            const std::string &nameWExt);
+
+    void textureImages(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            aiScene *pScene,
+            const std::string &nameWExt);
+
+    void buffers(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            aiScene *pScene,
+            const std::string &nameWExt);
+
+    void setupNodes(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            aiScene *pScene,
+            std::map<size_t, tinyusdz::tydra::Node> &meshNodes,
+            const std::string &nameWExt
+            );
+
+    aiNode *nodes(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            std::map<size_t, tinyusdz::tydra::Node> &meshNodes,
+            const std::string &nameWExt);
+
+    aiNode *nodesRecursive(
+            aiNode *pNodeParent,
+            const tinyusdz::tydra::Node &node,
+            std::map<size_t, tinyusdz::tydra::Node> &meshNodes);
+
+    void sanityCheckNodesRecursive(
+            aiNode *pNode);
+
+    void setupBlendShapes(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            aiScene *pScene,
+            const std::string &nameWExt);
+
+    void blendShapesForMesh(
+            const tinyusdz::tydra::RenderScene &render_scene,
+            aiScene *pScene,
+            size_t meshIdx,
+            const std::string &nameWExt);
+};
+} // namespace Assimp
+#endif // AI_USDLOADER_IMPL_TINYUSDZ_H_INCLUDED

code/AssetLib/USD/USDLoaderImplTinyusdzHelper.cpp

@@ -0,0 +1,151 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2024, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 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.
+
+----------------------------------------------------------------------
+*/
+
+#ifndef ASSIMP_BUILD_NO_USD_IMPORTER
+#include "USDLoaderImplTinyusdzHelper.h"
+
+#include "../../../contrib/tinyusdz/assimp_tinyusdz_logging.inc"
+
+namespace {
+//const char *const TAG = "tinyusdz helper";
+}
+
+using ChannelType = tinyusdz::tydra::AnimationChannel::ChannelType;
+std::string Assimp::tinyusdzAnimChannelTypeFor(ChannelType animChannel) {
+    switch (animChannel) {
+    case ChannelType::Transform: {
+        return "Transform";
+    }
+    case ChannelType::Translation: {
+        return "Translation";
+    }
+    case ChannelType::Rotation: {
+        return "Rotation";
+    }
+    case ChannelType::Scale: {
+        return "Scale";
+    }
+    case ChannelType::Weight: {
+        return "Weight";
+    }
+    default:
+        return "Invalid";
+    }
+}
+
+using tinyusdz::tydra::NodeType;
+std::string Assimp::tinyusdzNodeTypeFor(NodeType type) {
+    switch (type) {
+    case NodeType::Xform: {
+        return "Xform";
+    }
+    case NodeType::Mesh: {
+        return "Mesh";
+    }
+    case NodeType::Camera: {
+        return "Camera";
+    }
+    case NodeType::Skeleton: {
+        return "Skeleton";
+    }
+    case NodeType::PointLight: {
+        return "PointLight";
+    }
+    case NodeType::DirectionalLight: {
+        return "DirectionalLight";
+    }
+    case NodeType::EnvmapLight: {
+        return "EnvmapLight";
+    }
+    default:
+        return "Invalid";
+    }
+}
+
+aiMatrix4x4 Assimp::tinyUsdzMat4ToAiMat4(const double matIn[4][4]) {
+    aiMatrix4x4 matOut;
+    matOut.a1 = matIn[0][0];
+    matOut.a2 = matIn[0][1];
+    matOut.a3 = matIn[0][2];
+    matOut.a4 = matIn[0][3];
+    matOut.b1 = matIn[1][0];
+    matOut.b2 = matIn[1][1];
+    matOut.b3 = matIn[1][2];
+    matOut.b4 = matIn[1][3];
+    matOut.c1 = matIn[2][0];
+    matOut.c2 = matIn[2][1];
+    matOut.c3 = matIn[2][2];
+    matOut.c4 = matIn[2][3];
+    matOut.d1 = matIn[3][0];
+    matOut.d2 = matIn[3][1];
+    matOut.d3 = matIn[3][2];
+    matOut.d4 = matIn[3][3];
+//    matOut.a1 = matIn[0][0];
+//    matOut.a2 = matIn[1][0];
+//    matOut.a3 = matIn[2][0];
+//    matOut.a4 = matIn[3][0];
+//    matOut.b1 = matIn[0][1];
+//    matOut.b2 = matIn[1][1];
+//    matOut.b3 = matIn[2][1];
+//    matOut.b4 = matIn[3][1];
+//    matOut.c1 = matIn[0][2];
+//    matOut.c2 = matIn[1][2];
+//    matOut.c3 = matIn[2][2];
+//    matOut.c4 = matIn[3][2];
+//    matOut.d1 = matIn[0][3];
+//    matOut.d2 = matIn[1][3];
+//    matOut.d3 = matIn[2][3];
+//    matOut.d4 = matIn[3][3];
+    return matOut;
+}
+
+aiVector3D Assimp::tinyUsdzScaleOrPosToAssimp(const std::array<float, 3> &scaleOrPosIn) {
+    return aiVector3D(scaleOrPosIn[0], scaleOrPosIn[1], scaleOrPosIn[2]);
+}
+
+aiQuaternion Assimp::tinyUsdzQuatToAiQuat(const std::array<float, 4> &quatIn) {
+    // tinyusdz "quat" is x,y,z,w
+    // aiQuaternion is w,x,y,z
+    return aiQuaternion(
+            quatIn[3], quatIn[0], quatIn[1], quatIn[2]);
+}
+
+#endif // !! ASSIMP_BUILD_NO_USD_IMPORTER

code/AssetLib/USD/USDLoaderImplTinyusdzHelper.h

@@ -0,0 +1,70 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2024, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 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.
+
+----------------------------------------------------------------------
+*/
+
+#pragma once
+#ifndef AI_USDLOADER_IMPL_TINYUSDZ_HELPER_H_INCLUDED
+#define AI_USDLOADER_IMPL_TINYUSDZ_HELPER_H_INCLUDED
+
+#include <assimp/BaseImporter.h>
+#include <assimp/scene.h>
+#include <assimp/types.h>
+#include "tinyusdz.hh"
+#include "tydra/render-data.hh"
+
+namespace Assimp {
+
+std::string tinyusdzAnimChannelTypeFor(
+        tinyusdz::tydra::AnimationChannel::ChannelType animChannel);
+std::string tinyusdzNodeTypeFor(tinyusdz::tydra::NodeType type);
+aiMatrix4x4 tinyUsdzMat4ToAiMat4(const double matIn[4][4]);
+
+aiVector3D tinyUsdzScaleOrPosToAssimp(const std::array<float, 3> &scaleOrPosIn);
+
+/**
+ * Convert quaternion from tinyusdz "quat" to assimp "aiQuaternion" type
+ *
+ * @param quatIn tinyusdz float[4] in x,y,z,w order
+ * @return assimp aiQuaternion converted from input
+ */
+aiQuaternion tinyUsdzQuatToAiQuat(const std::array<float, 4> &quatIn);
+
+} // namespace Assimp
+#endif // AI_USDLOADER_IMPL_TINYUSDZ_HELPER_H_INCLUDED

code/AssetLib/USD/USDLoaderUtil.cpp

@@ -0,0 +1,116 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2024, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 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.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  USDLoader.cpp
+ *  @brief Implementation of the USD importer class
+ */
+
+#ifndef ASSIMP_BUILD_NO_USD_IMPORTER
+#include <memory>
+
+// internal headers
+#include <assimp/ai_assert.h>
+#include <assimp/anim.h>
+#include <assimp/DefaultIOSystem.h>
+#include <assimp/DefaultLogger.hpp>
+#include <assimp/fast_atof.h>
+#include <assimp/Importer.hpp>
+#include <assimp/importerdesc.h>
+#include <assimp/IOStreamBuffer.h>
+#include <assimp/IOSystem.hpp>
+#include <assimp/scene.h>
+#include <assimp/StringUtils.h>
+#include <assimp/StreamReader.h>
+
+#include "USDLoaderUtil.h"
+
+namespace Assimp {
+using namespace std;
+bool isUsda(const std::string &pFile) {
+    size_t pos = pFile.find_last_of('.');
+    if (pos == string::npos) {
+        return false;
+    }
+    string ext = pFile.substr(pos + 1);
+    if (ext.size() != 4) {
+        return false;
+    }
+    return (ext[0] == 'u' || ext[0] == 'U') && (ext[1] == 's' || ext[1] == 'S') && (ext[2] == 'd' || ext[2] == 'D') && (ext[3] == 'a' || ext[3] == 'A');
+}
+
+bool isUsdc(const std::string &pFile) {
+    size_t pos = pFile.find_last_of('.');
+    if (pos == string::npos) {
+        return false;
+    }
+    string ext = pFile.substr(pos + 1);
+    if (ext.size() != 4) {
+        return false;
+    }
+    return (ext[0] == 'u' || ext[0] == 'U') && (ext[1] == 's' || ext[1] == 'S') && (ext[2] == 'd' || ext[2] == 'D') && (ext[3] == 'c' || ext[3] == 'C');
+}
+
+bool isUsdz(const std::string &pFile) {
+    size_t pos = pFile.find_last_of('.');
+    if (pos == string::npos) {
+        return false;
+    }
+    string ext = pFile.substr(pos + 1);
+    if (ext.size() != 4) {
+        return false;
+    }
+    return (ext[0] == 'u' || ext[0] == 'U') && (ext[1] == 's' || ext[1] == 'S') && (ext[2] == 'd' || ext[2] == 'D') && (ext[3] == 'z' || ext[3] == 'Z');
+}
+
+bool isUsd(const std::string &pFile) {
+    size_t pos = pFile.find_last_of('.');
+    if (pos == string::npos) {
+        return false;
+    }
+    string ext = pFile.substr(pos + 1);
+    if (ext.size() != 3) {
+        return false;
+    }
+    return (ext[0] == 'u' || ext[0] == 'U') && (ext[1] == 's' || ext[1] == 'S') && (ext[2] == 'd' || ext[2] == 'D');
+}
+} // namespace Assimp
+
+#endif // !! ASSIMP_BUILD_NO_USD_IMPORTER

code/AssetLib/USD/USDLoaderUtil.h

@@ -0,0 +1,60 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2024, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 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.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  USDLoader.h
+ *  @brief Declaration of the USD importer class.
+ */
+#pragma once
+#ifndef AI_USDLOADER_UTIL_H_INCLUDED
+#define AI_USDLOADER_UTIL_H_INCLUDED
+
+#include <string>
+
+namespace Assimp {
+
+bool isUsda(const std::string &pFile);
+bool isUsdc(const std::string &pFile);
+bool isUsdz(const std::string &pFile);
+bool isUsd(const std::string &pFile);
+
+} // namespace Assimp
+
+#endif // AI_USDLOADER_UTIL_H_INCLUDED

code/AssetLib/USD/USDPreprocessor.h

@@ -0,0 +1,50 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2024, assimp team
+
+                          All rights reserved.
+
+                          Redistribution and use of this software in source and binary forms,
+        with or without modification, are permitted provided that the
+        following conditions are met:
+
+        * Redistributions of source code must retain the above
+        copyright notice, this list of conditions and the
+        following disclaimer.
+
+                * Redistributions in binary form must reproduce the above
+        copyright notice, this list of conditions and the
+                        following disclaimer in the documentation and/or other
+                   materials provided with the distribution.
+
+                           * Neither the name of the assimp team, nor the names of its
+                contributors may be used to endorse or promote products
+                   derived from this software without specific prior
+                   written permission of the assimp team.
+
+                   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+                   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+        LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+        A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+        OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+        SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+                                                    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+                                 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+        THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 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.
+                ----------------------------------------------------------------------
+                */
+
+/** @file  USDLoader.h
+ *  @brief Declaration of the USD importer class.
+ */
+#pragma once
+#ifndef AI_USDPREPROCESSOR_H_INCLUDED
+#define AI_USDPREPROCESSOR_H_INCLUDED
+
+#define UNUSED(x) (void) x
+
+#endif // AI_USDPREPROCESSOR_H_INCLUDED

code/AssetLib/Unreal/UnrealLoader.cpp

@@ -452,7 +452,7 @@ void UnrealImporter::InternReadFile(const std::string &pFile,
         aiColor3D color(1.f, 1.f, 1.f);
 
         aiString s;
-        ::ai_snprintf(s.data, MAXLEN, "mat%u_tx%u_", i, materials[i].tex);
+        ::ai_snprintf(s.data, AI_MAXLEN, "mat%u_tx%u_", i, materials[i].tex);
 
         // set the two-sided flag
         if (materials[i].type == Unreal::MF_NORMAL_TS) {
@@ -472,7 +472,7 @@ void UnrealImporter::InternReadFile(const std::string &pFile,
 
         // a special name for the weapon attachment point
         if (materials[i].type == Unreal::MF_WEAPON_PLACEHOLDER) {
-            s.length = ::ai_snprintf(s.data, MAXLEN, "$WeaponTag$");
+            s.length = ::ai_snprintf(s.data, AI_MAXLEN, "$WeaponTag$");
             color = aiColor3D(0.f, 0.f, 0.f);
         }
 

code/AssetLib/glTF/glTFImporter.cpp

@@ -109,7 +109,7 @@ inline void SetMaterialColorProperty(std::vector<int> &embeddedTexIdxs, Asset &
             if (texIdx != -1) { // embedded
                 // setup texture reference string (copied from ColladaLoader::FindFilenameForEffectTexture)
                 uri.data[0] = '*';
-                uri.length = 1 + ASSIMP_itoa10(uri.data + 1, MAXLEN - 1, texIdx);
+                uri.length = 1 + ASSIMP_itoa10(uri.data + 1, AI_MAXLEN - 1, texIdx);
             }
 
             mat->AddProperty(&uri, _AI_MATKEY_TEXTURE_BASE, texType, 0);
@@ -242,7 +242,7 @@ void glTFImporter::ImportMeshes(glTF::Asset &r) {
             if (mesh.primitives.size() > 1) {
                 ai_uint32 &len = aim->mName.length;
                 aim->mName.data[len] = '-';
-                len += 1 + ASSIMP_itoa10(aim->mName.data + len + 1, unsigned(MAXLEN - len - 1), p);
+                len += 1 + ASSIMP_itoa10(aim->mName.data + len + 1, unsigned(AI_MAXLEN - len - 1), p);
             }
 
             switch (prim.mode) {

code/AssetLib/glTF2/glTF2Asset.inl

@@ -1036,10 +1036,10 @@ size_t Accessor::ExtractData(T *&outData, const std::vector<unsigned int> *remap
     outData = new T[usedCount];
 
     if (remappingIndices != nullptr) {
-        const unsigned int maxIndex = static_cast<unsigned int>(maxSize / stride - 1);
+        const unsigned int maxIndexCount = static_cast<unsigned int>(maxSize / stride);
         for (size_t i = 0; i < usedCount; ++i) {
             size_t srcIdx = (*remappingIndices)[i];
-            if (srcIdx > maxIndex) {
+            if (srcIdx >= maxIndexCount) {
                 throw DeadlyImportError("GLTF: index*stride ", (srcIdx * stride), " > maxSize ", maxSize, " in ", getContextForErrorMessages(id, name));
             }
             memcpy(outData + i, data + srcIdx * stride, elemSize);
@@ -1440,7 +1440,7 @@ inline void MaterialSheen::SetDefaults() {
 inline void MaterialVolume::SetDefaults() {
     //KHR_materials_volume properties
     thicknessFactor = 0.f;
-    attenuationDistance = INFINITY;
+    attenuationDistance = std::numeric_limits<float>::infinity();
     SetVector(attenuationColor, defaultAttenuationColor);
 }
 

code/AssetLib/glTF2/glTF2AssetWriter.inl

@@ -507,7 +507,7 @@ namespace glTF2 {
 
             WriteTex(materialVolume, volume.thicknessTexture, "thicknessTexture", w.mAl);
 
-            if (volume.attenuationDistance != INFINITY) {
+            if (volume.attenuationDistance != std::numeric_limits<float>::infinity()) {
                 WriteFloat(materialVolume, volume.attenuationDistance, "attenuationDistance", w.mAl);
             }
 
@@ -940,7 +940,7 @@ namespace glTF2 {
             if (outfile->Write(bodyBuffer->GetPointer(), 1, bodyBuffer->byteLength) != bodyBuffer->byteLength) {
                 throw DeadlyExportError("Failed to write body data!");
             }
-            if (curPaddingLength && outfile->Write(&padding, 1, paddingLength) != paddingLength) {
+            if (curPaddingLength && outfile->Write(&padding, 1, curPaddingLength) != curPaddingLength) {
                 throw DeadlyExportError("Failed to write body data padding!");
             }
         }

code/AssetLib/glTF2/glTF2Importer.cpp

@@ -161,7 +161,7 @@ static void SetMaterialTextureProperty(std::vector<int> &embeddedTexIdxs, Asset
         if (texIdx != -1) { // embedded
             // setup texture reference string (copied from ColladaLoader::FindFilenameForEffectTexture)
             uri.data[0] = '*';
-            uri.length = 1 + ASSIMP_itoa10(uri.data + 1, MAXLEN - 1, texIdx);
+            uri.length = 1 + ASSIMP_itoa10(uri.data + 1, AI_MAXLEN - 1, texIdx);
         }
 
         mat->AddProperty(&uri, AI_MATKEY_TEXTURE(texType, texSlot));
@@ -539,7 +539,7 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
             if (mesh.primitives.size() > 1) {
                 ai_uint32 &len = aim->mName.length;
                 aim->mName.data[len] = '-';
-                len += 1 + ASSIMP_itoa10(aim->mName.data + len + 1, unsigned(MAXLEN - len - 1), p);
+                len += 1 + ASSIMP_itoa10(aim->mName.data + len + 1, unsigned(AI_MAXLEN - len - 1), p);
             }
 
             switch (prim.mode) {

code/CMakeLists.txt

@@ -828,6 +828,17 @@ ADD_ASSIMP_IMPORTER( 3D
   AssetLib/Unreal/UnrealLoader.h
 )
 
+ADD_ASSIMP_IMPORTER( USD
+  AssetLib/USD/USDLoader.cpp
+  AssetLib/USD/USDLoader.h
+  AssetLib/USD/USDLoaderImplTinyusdz.cpp
+  AssetLib/USD/USDLoaderImplTinyusdz.h
+  AssetLib/USD/USDLoaderImplTinyusdzHelper.cpp
+  AssetLib/USD/USDLoaderImplTinyusdzHelper.h
+  AssetLib/USD/USDLoaderUtil.cpp
+  AssetLib/USD/USDLoaderUtil.h
+)
+
 ADD_ASSIMP_IMPORTER( X
   AssetLib/X/XFileHelper.h
   AssetLib/X/XFileImporter.cpp
@@ -921,11 +932,128 @@ SET( Extra_SRCS
 )
 SOURCE_GROUP( Extra FILES ${Extra_SRCS})
 
+# USD/USDA/USDC/USDZ support
+# tinyusdz
+IF (ASSIMP_BUILD_USD_IMPORTER)
+    if (ASSIMP_BUILD_USD_VERBOSE_LOGS)
+        ADD_DEFINITIONS( -DASSIMP_USD_VERBOSE_LOGS)
+    endif ()
+    # Use CMAKE_CURRENT_SOURCE_DIR which provides assimp-local path (CMAKE_SOURCE_DIR is
+    # relative to top-level/main project)
+    set(Tinyusdz_BASE_ABSPATH "${CMAKE_CURRENT_SOURCE_DIR}/../contrib/tinyusdz")
+    set(Tinyusdz_REPO_ABSPATH "${Tinyusdz_BASE_ABSPATH}/autoclone")
+
+    # Note: ALWAYS specify a git commit hash (or tag) instead of a branch name; using a branch
+    #       name can lead to non-deterministic (unpredictable) results since the code is potentially
+    #       in flux
+    # "dev" branch, 9 Jul 2024
+    set(TINYUSDZ_GIT_TAG "bd2a1edbbf69f352a6c40730114db9918c384848")
+    message("****")
+    message("\n\n**** Cloning tinyusdz repo, git tag ${TINYUSDZ_GIT_TAG}\n\n")
+
+    # Patch required to build arm32 on android
+    set(TINYUSDZ_PATCH_CMD git apply ${Tinyusdz_BASE_ABSPATH}/patches/tinyusdz.patch)
+
+    # Note: CMake's "FetchContent" (which executes at configure time) is much better for this use case
+    #       than "ExternalProject" (which executes at build time); we just want to clone a repo and
+    #       block (wait) as long as necessary until cloning is complete, so we immediately have full
+    #       access to the cloned source files
+    include(FetchContent)
+    # Only want to clone once (on Android, using SOURCE_DIR will clone per-ABI (x86, x86_64 etc))
+    set(FETCHCONTENT_BASE_DIR ${Tinyusdz_REPO_ABSPATH})
+    set(FETCHCONTENT_QUIET on) # Turn off to troubleshoot repo clone problems
+    set(FETCHCONTENT_UPDATES_DISCONNECTED on) # Prevent other ABIs from re-cloning/re-patching etc
+    FetchContent_Declare(
+            tinyusdz_repo
+            GIT_REPOSITORY "https://github.com/lighttransport/tinyusdz"
+            GIT_TAG        ${TINYUSDZ_GIT_TAG}
+            PATCH_COMMAND  ${TINYUSDZ_PATCH_CMD}
+    )
+    FetchContent_MakeAvailable(tinyusdz_repo)
+    message("**** Finished cloning tinyusdz repo")
+    message("****")
+
+    set(Tinyusdz_SRC_ABSPATH "${Tinyusdz_REPO_ABSPATH}/tinyusdz_repo-src/src")
+    set(Tinyusdz_SRCS
+            ${Tinyusdz_SRC_ABSPATH}/ascii-parser.cc
+            ${Tinyusdz_SRC_ABSPATH}/ascii-parser-basetype.cc
+            ${Tinyusdz_SRC_ABSPATH}/ascii-parser-timesamples.cc
+            ${Tinyusdz_SRC_ABSPATH}/ascii-parser-timesamples-array.cc
+            ${Tinyusdz_SRC_ABSPATH}/asset-resolution.cc
+            ${Tinyusdz_SRC_ABSPATH}/composition.cc
+            ${Tinyusdz_SRC_ABSPATH}/crate-format.cc
+            ${Tinyusdz_SRC_ABSPATH}/crate-pprint.cc
+            ${Tinyusdz_SRC_ABSPATH}/crate-reader.cc
+            ${Tinyusdz_SRC_ABSPATH}/image-loader.cc
+            ${Tinyusdz_SRC_ABSPATH}/image-util.cc
+            ${Tinyusdz_SRC_ABSPATH}/image-writer.cc
+            ${Tinyusdz_SRC_ABSPATH}/io-util.cc
+            ${Tinyusdz_SRC_ABSPATH}/linear-algebra.cc
+            ${Tinyusdz_SRC_ABSPATH}/path-util.cc
+            ${Tinyusdz_SRC_ABSPATH}/pprinter.cc
+            ${Tinyusdz_SRC_ABSPATH}/prim-composition.cc
+            ${Tinyusdz_SRC_ABSPATH}/prim-reconstruct.cc
+            ${Tinyusdz_SRC_ABSPATH}/prim-types.cc
+            ${Tinyusdz_SRC_ABSPATH}/primvar.cc
+            ${Tinyusdz_SRC_ABSPATH}/stage.cc
+            ${Tinyusdz_SRC_ABSPATH}/str-util.cc
+            ${Tinyusdz_SRC_ABSPATH}/tiny-format.cc
+            ${Tinyusdz_SRC_ABSPATH}/tinyusdz.cc
+            ${Tinyusdz_SRC_ABSPATH}/tydra/attribute-eval.cc
+            ${Tinyusdz_SRC_ABSPATH}/tydra/attribute-eval-typed.cc
+            ${Tinyusdz_SRC_ABSPATH}/tydra/attribute-eval-typed-animatable.cc
+            ${Tinyusdz_SRC_ABSPATH}/tydra/attribute-eval-typed-animatable-fallback.cc
+            ${Tinyusdz_SRC_ABSPATH}/tydra/attribute-eval-typed-fallback.cc
+            ${Tinyusdz_SRC_ABSPATH}/tydra/facial.cc
+            ${Tinyusdz_SRC_ABSPATH}/tydra/prim-apply.cc
+            ${Tinyusdz_SRC_ABSPATH}/tydra/render-data.cc
+            ${Tinyusdz_SRC_ABSPATH}/tydra/scene-access.cc
+            ${Tinyusdz_SRC_ABSPATH}/tydra/shader-network.cc
+            ${Tinyusdz_SRC_ABSPATH}/usda-reader.cc
+            ${Tinyusdz_SRC_ABSPATH}/usda-writer.cc
+            ${Tinyusdz_SRC_ABSPATH}/usdc-reader.cc
+            ${Tinyusdz_SRC_ABSPATH}/usdc-writer.cc
+            ${Tinyusdz_SRC_ABSPATH}/usdGeom.cc
+            ${Tinyusdz_SRC_ABSPATH}/usdLux.cc
+            ${Tinyusdz_SRC_ABSPATH}/usdMtlx.cc
+            ${Tinyusdz_SRC_ABSPATH}/usdShade.cc
+            ${Tinyusdz_SRC_ABSPATH}/usdSkel.cc
+            ${Tinyusdz_SRC_ABSPATH}/value-pprint.cc
+            ${Tinyusdz_SRC_ABSPATH}/value-types.cc
+            ${Tinyusdz_SRC_ABSPATH}/xform.cc
+    )
+
+    set(Tinyusdz_DEP_SOURCES
+            ${Tinyusdz_SRC_ABSPATH}/external/fpng.cpp
+            #${Tinyusdz_SRC_ABSPATH}/external/staticstruct.cc
+            #${Tinyusdz_SRC_ABSPATH}/external/string_id/database.cpp
+            #${Tinyusdz_SRC_ABSPATH}/external/string_id/error.cpp
+            #${Tinyusdz_SRC_ABSPATH}/external/string_id/string_id.cpp
+            #${Tinyusdz_SRC_ABSPATH}/external/tinyxml2/tinyxml2.cpp
+            ${Tinyusdz_SRC_ABSPATH}/integerCoding.cpp
+            ${Tinyusdz_SRC_ABSPATH}/lz4-compression.cc
+            ${Tinyusdz_SRC_ABSPATH}/lz4/lz4.c
+    )
+
+    set(tinyusdz_INCLUDE_DIRS "${Tinyusdz_SRC_ABSPATH}")
+    INCLUDE_DIRECTORIES(${tinyusdz_INCLUDE_DIRS})
+    SOURCE_GROUP( Contrib\\Tinyusdz
+            FILES
+            ${Tinyusdz_SRCS}
+            ${Tinyusdz_DEP_SOURCES}
+    )
+    MESSAGE(STATUS "tinyusdz enabled")
+ELSE() # IF (ASSIMP_BUILD_USD_IMPORTER)
+    set(Tinyusdz_SRCS "")
+    set(Tinyusdz_DEP_SOURCES "")
+    MESSAGE(STATUS "tinyusdz disabled")
+ENDIF() # IF (ASSIMP_BUILD_USD_IMPORTER)
+
 # pugixml
 IF(ASSIMP_HUNTER_ENABLED)
   hunter_add_package(pugixml)
   find_package(pugixml CONFIG REQUIRED)
-ELSE()
+ELSEIF(NOT TARGET pugixml::pugixml)
   SET( Pugixml_SRCS
     ../contrib/pugixml/src/pugiconfig.hpp
     ../contrib/pugixml/src/pugixml.hpp
@@ -1171,6 +1299,8 @@ SET( assimp_src
   ${openddl_parser_SRCS}
   ${open3dgc_SRCS}
   ${ziplib_SRCS}
+  ${Tinyusdz_SRCS}
+  ${Tinyusdz_DEP_SOURCES}
   ${Pugixml_SRCS}
   ${stb_SRCS}
   # Necessary to show the headers in the project when using the VC++ generator:
@@ -1204,7 +1334,7 @@ ADD_LIBRARY(assimp::assimp ALIAS assimp)
 IF (BUILD_SHARED_LIBS)
   TARGET_COMPILE_DEFINITIONS(assimp PRIVATE ASSIMP_BUILD_DLL_EXPORT)
 ELSE ()
-  TARGET_COMPILE_DEFINITIONS(assimp PRIVATE OPENDDL_STATIC_LIBARY)
+  TARGET_COMPILE_DEFINITIONS(assimp PRIVATE OPENDDL_STATIC_LIBARY P2T_STATIC_EXPORTS)
 ENDIF ()
 
 TARGET_USE_COMMON_OUTPUT_DIRECTORY(assimp)
@@ -1266,6 +1396,7 @@ IF (ASSIMP_WARNINGS_AS_ERRORS)
         -Wno-unused-template
         -Wno-undefined-func-template
         -Wno-declaration-after-statement
+        -Wno-deprecated-declarations
       )
     ELSE()
       TARGET_COMPILE_OPTIONS(assimp PRIVATE /W4 /WX)
@@ -1287,9 +1418,7 @@ TARGET_INCLUDE_DIRECTORIES ( assimp PUBLIC
 IF(ASSIMP_HUNTER_ENABLED)
   TARGET_LINK_LIBRARIES(assimp
       PUBLIC
-      #polyclipping::polyclipping
       openddlparser::openddl_parser
-      #poly2tri::poly2tri
       minizip::minizip
       ZLIB::zlib
       RapidJSON::rapidjson
@@ -1309,6 +1438,9 @@ ELSE()
   if (ASSIMP_BUILD_DRACO)
     target_link_libraries(assimp ${draco_LIBRARIES})
   endif()
+  if(TARGET pugixml::pugixml)
+    target_link_libraries(assimp pugixml::pugixml)
+  endif()
 ENDIF()
 
 if(ASSIMP_ANDROID_JNIIOSYSTEM)
@@ -1445,7 +1577,7 @@ if(MSVC AND ASSIMP_INSTALL_PDB)
       COMPILE_PDB_NAME_DEBUG assimp${LIBRARY_SUFFIX}${CMAKE_DEBUG_POSTFIX}
     )
 
-    IF(GENERATOR_IS_MULTI_CONFIG)
+    IF(is_multi_config)
       install(FILES ${Assimp_BINARY_DIR}/code/Debug/assimp${LIBRARY_SUFFIX}${CMAKE_DEBUG_POSTFIX}.pdb
         DESTINATION ${ASSIMP_LIB_INSTALL_DIR}
         CONFIGURATIONS Debug

code/Common/Assimp.cpp

@@ -359,20 +359,25 @@ void CallbackToLogRedirector(const char *msg, char *dt) {
     s->write(msg);
 }
 
+static LogStream *DefaultStream = nullptr;
+
 // ------------------------------------------------------------------------------------------------
 ASSIMP_API aiLogStream aiGetPredefinedLogStream(aiDefaultLogStream pStream, const char *file) {
     aiLogStream sout;
 
     ASSIMP_BEGIN_EXCEPTION_REGION();
-    LogStream *stream = LogStream::createDefaultStream(pStream, file);
-    if (!stream) {
+    if (DefaultStream == nullptr) {
+        DefaultStream = LogStream::createDefaultStream(pStream, file);
+    }
+    
+    if (!DefaultStream) {
         sout.callback = nullptr;
         sout.user = nullptr;
     } else {
         sout.callback = &CallbackToLogRedirector;
-        sout.user = (char *)stream;
+        sout.user = (char *)DefaultStream;
     }
-    gPredefinedStreams.push_back(stream);
+    gPredefinedStreams.push_back(DefaultStream);
     ASSIMP_END_EXCEPTION_REGION(aiLogStream);
     return sout;
 }
@@ -512,6 +517,11 @@ void aiGetMemoryRequirements(const C_STRUCT aiScene *pIn,
     ASSIMP_END_EXCEPTION_REGION(void);
 }
 
+// ------------------------------------------------------------------------------------------------
+ASSIMP_API const C_STRUCT aiTexture *aiGetEmbeddedTexture(const C_STRUCT aiScene *pIn, const char *filename) {
+    return pIn->GetEmbeddedTexture(filename);
+}
+
 // ------------------------------------------------------------------------------------------------
 ASSIMP_API aiPropertyStore *aiCreatePropertyStore(void) {
     return reinterpret_cast<aiPropertyStore *>(new PropertyMap());
@@ -743,14 +753,14 @@ ASSIMP_API void aiVector2DivideByVector(
 }
 
 // ------------------------------------------------------------------------------------------------
-ASSIMP_API float aiVector2Length(
+ASSIMP_API ai_real aiVector2Length(
         const C_STRUCT aiVector2D *v) {
     ai_assert(nullptr != v);
     return v->Length();
 }
 
 // ------------------------------------------------------------------------------------------------
-ASSIMP_API float aiVector2SquareLength(
+ASSIMP_API ai_real aiVector2SquareLength(
         const C_STRUCT aiVector2D *v) {
     ai_assert(nullptr != v);
     return v->SquareLength();
@@ -764,7 +774,7 @@ ASSIMP_API void aiVector2Negate(
 }
 
 // ------------------------------------------------------------------------------------------------
-ASSIMP_API float aiVector2DotProduct(
+ASSIMP_API ai_real aiVector2DotProduct(
         const C_STRUCT aiVector2D *a,
         const C_STRUCT aiVector2D *b) {
     ai_assert(nullptr != a);
@@ -859,14 +869,14 @@ ASSIMP_API void aiVector3DivideByVector(
 }
 
 // ------------------------------------------------------------------------------------------------
-ASSIMP_API float aiVector3Length(
+ASSIMP_API ai_real aiVector3Length(
         const C_STRUCT aiVector3D *v) {
     ai_assert(nullptr != v);
     return v->Length();
 }
 
 // ------------------------------------------------------------------------------------------------
-ASSIMP_API float aiVector3SquareLength(
+ASSIMP_API ai_real aiVector3SquareLength(
         const C_STRUCT aiVector3D *v) {
     ai_assert(nullptr != v);
     return v->SquareLength();
@@ -880,7 +890,7 @@ ASSIMP_API void aiVector3Negate(
 }
 
 // ------------------------------------------------------------------------------------------------
-ASSIMP_API float aiVector3DotProduct(
+ASSIMP_API ai_real aiVector3DotProduct(
         const C_STRUCT aiVector3D *a,
         const C_STRUCT aiVector3D *b) {
     ai_assert(nullptr != a);
@@ -966,7 +976,7 @@ ASSIMP_API void aiMatrix3Inverse(C_STRUCT aiMatrix3x3 *mat) {
 }
 
 // ------------------------------------------------------------------------------------------------
-ASSIMP_API float aiMatrix3Determinant(const C_STRUCT aiMatrix3x3 *mat) {
+ASSIMP_API ai_real aiMatrix3Determinant(const C_STRUCT aiMatrix3x3 *mat) {
     ai_assert(nullptr != mat);
     return mat->Determinant();
 }
@@ -1066,7 +1076,7 @@ ASSIMP_API void aiMatrix4Inverse(C_STRUCT aiMatrix4x4 *mat) {
 }
 
 // ------------------------------------------------------------------------------------------------
-ASSIMP_API float aiMatrix4Determinant(const C_STRUCT aiMatrix4x4 *mat) {
+ASSIMP_API ai_real aiMatrix4Determinant(const C_STRUCT aiMatrix4x4 *mat) {
     ai_assert(nullptr != mat);
     return mat->Determinant();
 }
@@ -1268,7 +1278,6 @@ ASSIMP_API void aiQuaternionInterpolate(
     aiQuaternion::Interpolate(*dst, *start, *end, factor);
 }
 
-
 // stb_image is a lightweight image loader. It is shared by:
 //  - M3D import
 //  - PBRT export
@@ -1279,21 +1288,21 @@ ASSIMP_API void aiQuaternionInterpolate(
 #define ASSIMP_HAS_M3D ((!ASSIMP_BUILD_NO_EXPORT && !ASSIMP_BUILD_NO_M3D_EXPORTER) || !ASSIMP_BUILD_NO_M3D_IMPORTER)
 
 #ifndef STB_USE_HUNTER
-#   if ASSIMP_HAS_PBRT_EXPORT
-#       define ASSIMP_NEEDS_STB_IMAGE 1
-#   elif ASSIMP_HAS_M3D
-#       define ASSIMP_NEEDS_STB_IMAGE 1
-#       define STBI_ONLY_PNG
-#   endif
+#if ASSIMP_HAS_PBRT_EXPORT
+#define ASSIMP_NEEDS_STB_IMAGE 1
+#elif ASSIMP_HAS_M3D
+#define ASSIMP_NEEDS_STB_IMAGE 1
+#define STBI_ONLY_PNG
+#endif
 #endif
 
 // Ensure all symbols are linked correctly
 #if ASSIMP_NEEDS_STB_IMAGE
-    // Share stb_image's PNG loader with other importers/exporters instead of bringing our own copy.
-#   define STBI_ONLY_PNG
-#   ifdef ASSIMP_USE_STB_IMAGE_STATIC
-#       define STB_IMAGE_STATIC
-#   endif
-#   define STB_IMAGE_IMPLEMENTATION
-#   include "Common/StbCommon.h"
+// Share stb_image's PNG loader with other importers/exporters instead of bringing our own copy.
+#define STBI_ONLY_PNG
+#ifdef ASSIMP_USE_STB_IMAGE_STATIC
+#define STB_IMAGE_STATIC
+#endif
+#define STB_IMAGE_IMPLEMENTATION
+#include "Common/StbCommon.h"
 #endif

code/Common/BaseImporter.cpp

@@ -250,9 +250,10 @@ void BaseImporter::GetExtensionList(std::set<std::string> &extensions) {
 /*static*/ bool BaseImporter::SimpleExtensionCheck(const std::string &pFile,
         const char *ext0,
         const char *ext1,
-        const char *ext2) {
+        const char *ext2,
+        const char *ext3) {
     std::set<std::string> extensions;
-    for (const char* ext : {ext0, ext1, ext2}) {
+    for (const char* ext : {ext0, ext1, ext2, ext3}) {
         if (ext == nullptr) continue;
         extensions.emplace(ext);
     }

code/Common/DefaultIOSystem.cpp

@@ -93,6 +93,10 @@ static std::string WideToUtf8(const wchar_t *in) {
 // ------------------------------------------------------------------------------------------------
 // Tests for the existence of a file at the given path.
 bool DefaultIOSystem::Exists(const char *pFile) const {
+    if (pFile == nullptr) {
+        return false;
+    }
+        
 #ifdef _WIN32
     struct __stat64 filestat;
     if (_wstat64(Utf8ToWide(pFile).c_str(), &filestat) != 0) {

code/Common/Importer.cpp

@@ -848,11 +848,7 @@ const aiScene* Importer::ApplyPostProcessing(unsigned int pFlags) {
             break;
         }
 #ifdef ASSIMP_BUILD_DEBUG
-
-#ifdef ASSIMP_BUILD_NO_VALIDATEDS_PROCESS
-        continue;
-#endif  // no validation
-
+#ifndef ASSIMP_BUILD_NO_VALIDATEDS_PROCESS
         // If the extra verbose mode is active, execute the ValidateDataStructureStep again - after each step
         if (pimpl->bExtraVerbose)   {
             ASSIMP_LOG_DEBUG("Verbose Import: re-validating data structures");
@@ -864,6 +860,7 @@ const aiScene* Importer::ApplyPostProcessing(unsigned int pFlags) {
                 break;
             }
         }
+#endif  // no validation
 #endif // ! DEBUG
     }
     pimpl->mProgressHandler->UpdatePostProcess( static_cast<int>(pimpl->mPostProcessingSteps.size()),
@@ -939,6 +936,7 @@ const aiScene* Importer::ApplyCustomizedPostProcessing( BaseProcess *rootProcess
         profiler->EndRegion( "postprocess" );
     }
 
+#ifndef ASSIMP_BUILD_NO_VALIDATEDS_PROCESS
     // If the extra verbose mode is active, execute the ValidateDataStructureStep again - after each step
     if ( pimpl->bExtraVerbose || requestValidation  ) {
         ASSIMP_LOG_DEBUG( "Verbose Import: revalidating data structures" );
@@ -949,6 +947,7 @@ const aiScene* Importer::ApplyCustomizedPostProcessing( BaseProcess *rootProcess
             ASSIMP_LOG_ERROR( "Verbose Import: failed to revalidate data structures" );
         }
     }
+#endif // no validation
 
     // clear any data allocated by post-process steps
     pimpl->mPPShared->Clean();

code/Common/ImporterRegistry.cpp

@@ -55,6 +55,9 @@ corresponding preprocessor flag to selectively disable formats.
 // Importers
 // (include_new_importers_here)
 // ------------------------------------------------------------------------------------------------
+#if !defined(ASSIMP_BUILD_NO_USD_IMPORTER)
+#include "AssetLib/USD/USDLoader.h"
+#endif
 #ifndef ASSIMP_BUILD_NO_X_IMPORTER
 #include "AssetLib/X/XFileImporter.h"
 #endif
@@ -230,6 +233,9 @@ void GetImporterInstanceList(std::vector<BaseImporter *> &out) {
     // (register_new_importers_here)
     // ----------------------------------------------------------------------------
     out.reserve(64);
+#if !defined(ASSIMP_BUILD_NO_USD_IMPORTER)
+    out.push_back(new USDImporter());
+#endif
 #if (!defined ASSIMP_BUILD_NO_X_IMPORTER)
     out.push_back(new XFileImporter());
 #endif

code/Common/SceneCombiner.cpp

@@ -63,6 +63,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/scene.h>
 #include <stdio.h>
 #include <assimp/DefaultLogger.hpp>
+#include <unordered_set>
 
 namespace Assimp {
 
@@ -78,7 +79,7 @@ inline void PrefixString(aiString &string, const char *prefix, unsigned int len)
     if (string.length >= 1 && string.data[0] == '$')
         return;
 
-    if (len + string.length >= MAXLEN - 1) {
+    if (len + string.length >= AI_MAXLEN - 1) {
         ASSIMP_LOG_VERBOSE_DEBUG("Can't add an unique prefix because the string is too long");
         ai_assert(false);
         return;
@@ -252,6 +253,14 @@ void SceneCombiner::AttachToGraph(aiScene *master, std::vector<NodeAttachmentInf
 // ------------------------------------------------------------------------------------------------
 void SceneCombiner::MergeScenes(aiScene **_dest, aiScene *master, std::vector<AttachmentInfo> &srcList, unsigned int flags) {
     if (nullptr == _dest) {
+        std::unordered_set<aiScene *> uniqueScenes;
+        uniqueScenes.insert(master);
+        for (const auto &item : srcList) {
+            uniqueScenes.insert(item.scene);
+        }
+        for (const auto &item : uniqueScenes) {
+            delete item;
+        }
         return;
     }
 
@@ -259,6 +268,7 @@ void SceneCombiner::MergeScenes(aiScene **_dest, aiScene *master, std::vector<At
     if (srcList.empty()) {
         if (*_dest) {
             SceneCombiner::CopySceneFlat(_dest, master);
+            delete master;
         } else
             *_dest = master;
         return;
@@ -408,7 +418,7 @@ void SceneCombiner::MergeScenes(aiScene **_dest, aiScene *master, std::vector<At
                             // where n is the index of the texture.
                             // Copy here because we overwrite the string data in-place and the buffer inside of aiString
                             // will be a lie if we just reinterpret from prop->mData. The size of mData is not guaranteed to be
-                            // MAXLEN in size.
+                            // AI_MAXLEN in size.
                             aiString s(*(aiString *)prop->mData);
                             if ('*' == s.data[0]) {
                                 // Offset the index and write it back ..
@@ -1057,7 +1067,7 @@ void SceneCombiner::CopyScene(aiScene **_dest, const aiScene *src, bool allocate
     dest->mFlags = src->mFlags;
 
     // source private data might be nullptr if the scene is user-allocated (i.e. for use with the export API)
-    if (dest->mPrivate != nullptr) {
+    if (src->mPrivate != nullptr) {
         ScenePriv(dest)->mPPStepsApplied = ScenePriv(src) ? ScenePriv(src)->mPPStepsApplied : 0;
     }
 }

code/Common/SpatialSort.cpp

@@ -71,10 +71,6 @@ SpatialSort::SpatialSort() :
     mPlaneNormal.Normalize();
 }
 
-// ------------------------------------------------------------------------------------------------
-// Destructor
-SpatialSort::~SpatialSort() = default;
-
 // ------------------------------------------------------------------------------------------------
 void SpatialSort::Fill(const aiVector3D *pPositions, unsigned int pNumPositions,
         unsigned int pElementOffset,

code/Common/StackAllocator.h

@@ -88,6 +88,11 @@ private:
 
 } // namespace Assimp
 
+/// @brief Fixes an undefined reference error when linking in certain build environments.
+//         May throw warnings about needing stdc++17, but should compile without issues on modern compilers.
+inline const size_t Assimp::StackAllocator::g_maxBytesPerBlock;
+inline const size_t Assimp::StackAllocator::g_startBytesPerBlock;
+
 #include "StackAllocator.inl"
 
 #endif // include guard

code/Material/MaterialSystem.cpp

@@ -174,6 +174,95 @@ aiReturn aiGetMaterialFloatArray(const aiMaterial *pMat,
     return AI_SUCCESS;
 }
 
+// ------------------------------------------------------------------------------------------------
+// Get an array of floating-point values from the material.
+aiReturn aiGetMaterialDoubleArray(const aiMaterial *pMat,
+        const char *pKey,
+        unsigned int type,
+        unsigned int index,
+        double *pOut,
+        unsigned int *pMax) {
+    ai_assert(pOut != nullptr);
+    ai_assert(pMat != nullptr);
+
+    const aiMaterialProperty *prop;
+    aiGetMaterialProperty(pMat, pKey, type, index, (const aiMaterialProperty **)&prop);
+    if (nullptr == prop) {
+        return AI_FAILURE;
+    }
+
+    // data is given in floats, convert to ai_real
+    unsigned int iWrite = 0;
+    if (aiPTI_Float == prop->mType || aiPTI_Buffer == prop->mType) {
+        iWrite = prop->mDataLength / sizeof(float);
+        if (pMax) {
+            iWrite = std::min(*pMax, iWrite);
+            ;
+        }
+
+        for (unsigned int a = 0; a < iWrite; ++a) {
+            pOut[a] = static_cast<ai_real>(reinterpret_cast<float *>(prop->mData)[a]);
+        }
+
+        if (pMax) {
+            *pMax = iWrite;
+        }
+    }
+    // data is given in doubles, convert to float
+    else if (aiPTI_Double == prop->mType) {
+        iWrite = prop->mDataLength / sizeof(double);
+        if (pMax) {
+            iWrite = std::min(*pMax, iWrite);
+            ;
+        }
+        for (unsigned int a = 0; a < iWrite; ++a) {
+            pOut[a] = static_cast<ai_real>(reinterpret_cast<double *>(prop->mData)[a]);
+        }
+        if (pMax) {
+            *pMax = iWrite;
+        }
+    }
+    // data is given in ints, convert to float
+    else if (aiPTI_Integer == prop->mType) {
+        iWrite = prop->mDataLength / sizeof(int32_t);
+        if (pMax) {
+            iWrite = std::min(*pMax, iWrite);
+        }
+        for (unsigned int a = 0; a < iWrite; ++a) {
+            pOut[a] = static_cast<ai_real>(reinterpret_cast<int32_t *>(prop->mData)[a]);
+        }
+        if (pMax) {
+            *pMax = iWrite;
+        }
+    }
+    // a string ... read floats separated by spaces
+    else {
+        if (pMax) {
+            iWrite = *pMax;
+        }
+        // strings are zero-terminated with a 32 bit length prefix, so this is safe
+        const char *cur = prop->mData + 4;
+        ai_assert(prop->mDataLength >= 5);
+        ai_assert(!prop->mData[prop->mDataLength - 1]);
+        for (unsigned int a = 0;; ++a) {
+            cur = fast_atoreal_move<double>(cur, pOut[a]);
+            if (a == iWrite - 1) {
+                break;
+            }
+            if (!IsSpace(*cur)) {
+                ASSIMP_LOG_ERROR("Material property", pKey,
+                        " is a string; failed to parse a float array out of it.");
+                return AI_FAILURE;
+            }
+        }
+
+        if (pMax) {
+            *pMax = iWrite;
+        }
+    }
+    return AI_SUCCESS;
+}
+
 // ------------------------------------------------------------------------------------------------
 // Get an array if integers from the material
 aiReturn aiGetMaterialIntegerArray(const aiMaterial *pMat,
@@ -486,7 +575,7 @@ aiReturn aiMaterial::AddBinaryProperty(const void *pInput,
     memcpy(pcNew->mData, pInput, pSizeInBytes);
 
     pcNew->mKey.length = static_cast<ai_uint32>(::strlen(pKey));
-    ai_assert(MAXLEN > pcNew->mKey.length);
+    ai_assert(AI_MAXLEN > pcNew->mKey.length);
     strcpy(pcNew->mKey.data, pKey);
 
     if (UINT_MAX != iOutIndex) {

code/PostProcessing/CalcTangentsProcess.cpp

@@ -200,8 +200,10 @@ bool CalcTangentsProcess::ProcessMesh(aiMesh *pMesh, unsigned int meshIndex) {
             localBitangent.NormalizeSafe();
 
             // reconstruct tangent/bitangent according to normal and bitangent/tangent when it's infinite or NaN.
-            bool invalid_tangent = is_special_float(localTangent.x) || is_special_float(localTangent.y) || is_special_float(localTangent.z);
-            bool invalid_bitangent = is_special_float(localBitangent.x) || is_special_float(localBitangent.y) || is_special_float(localBitangent.z);
+            bool invalid_tangent = is_special_float(localTangent.x) || is_special_float(localTangent.y) || is_special_float(localTangent.z) 
+                || (-0.5f < localTangent.x && localTangent.x < 0.5f && -0.5f < localTangent.y && localTangent.y < 0.5f && -0.5f < localTangent.z && localTangent.z < 0.5f);
+            bool invalid_bitangent = is_special_float(localBitangent.x) || is_special_float(localBitangent.y) || is_special_float(localBitangent.z)
+                || (-0.5f < localBitangent.x && localBitangent.x < 0.5f && -0.5f < localBitangent.y && localBitangent.y < 0.5f && -0.5f < localBitangent.z && localBitangent.z < 0.5f);
             if (invalid_tangent != invalid_bitangent) {
                 if (invalid_tangent) {
                     localTangent = meshNorm[p] ^ localBitangent;

code/PostProcessing/FindDegenerates.cpp

@@ -143,9 +143,13 @@ bool FindDegeneratesProcess::ExecuteOnMesh(aiMesh *mesh) {
     for (unsigned int a = 0; a < mesh->mNumFaces; ++a) {
         aiFace &face = mesh->mFaces[a];
         bool first = true;
+        auto vertex_in_range = [numVertices = mesh->mNumVertices](unsigned int vertex_idx) { return vertex_idx < numVertices; };
 
         // check whether the face contains degenerated entries
         for (unsigned int i = 0; i < face.mNumIndices; ++i) {
+            if (!std::all_of(face.mIndices, face.mIndices + face.mNumIndices, vertex_in_range))
+                continue;
+
             // Polygons with more than 4 points are allowed to have double points, that is
             // simulating polygons with holes just with concave polygons. However,
             // double points may not come directly after another.

code/PostProcessing/ImproveCacheLocality.cpp

@@ -380,3 +380,4 @@ ai_real ImproveCacheLocalityProcess::ProcessMesh(aiMesh *pMesh, unsigned int mes
 }
 
 } // namespace Assimp
+

code/PostProcessing/LimitBoneWeightsProcess.cpp

@@ -53,7 +53,8 @@ namespace Assimp {
 
 // ------------------------------------------------------------------------------------------------
 // Constructor to be privately used by Importer
-LimitBoneWeightsProcess::LimitBoneWeightsProcess() : mMaxWeights(AI_LMW_MAX_WEIGHTS) {
+LimitBoneWeightsProcess::LimitBoneWeightsProcess() :
+        mMaxWeights(AI_LMW_MAX_WEIGHTS), mRemoveEmptyBones(true) {
     // empty
 }
 

code/PostProcessing/OptimizeGraph.cpp

@@ -164,7 +164,7 @@ void OptimizeGraphProcess::CollectNewChildren(aiNode *nd, std::list<aiNode *> &n
 			++it;
 		}
 		if (join_master && !join.empty()) {
-			join_master->mName.length = ::ai_snprintf(join_master->mName.data, MAXLEN, "$MergedNode_%u", count_merged++);
+            join_master->mName.length = ::ai_snprintf(join_master->mName.data, AI_MAXLEN, "$MergedNode_%u", count_merged++);
 
 			unsigned int out_meshes = 0;
 			for (std::list<aiNode *>::const_iterator it = join.cbegin(); it != join.cend(); ++it) {

code/PostProcessing/PretransformVertices.cpp

@@ -635,7 +635,7 @@ void PretransformVertices::Execute(aiScene *pScene) {
 				aiNode *pcNode = new aiNode();
 				*nodes = pcNode;
 				pcNode->mParent = pScene->mRootNode;
-				pcNode->mName.length = ai_snprintf(pcNode->mName.data, MAXLEN, "light_%u", i);
+				pcNode->mName.length = ai_snprintf(pcNode->mName.data, AI_MAXLEN, "light_%u", i);
 				pScene->mLights[i]->mName = pcNode->mName;
 			}
 			// generate camera nodes
@@ -643,7 +643,7 @@ void PretransformVertices::Execute(aiScene *pScene) {
 				aiNode *pcNode = new aiNode();
 				*nodes = pcNode;
 				pcNode->mParent = pScene->mRootNode;
-				pcNode->mName.length = ::ai_snprintf(pcNode->mName.data, MAXLEN, "cam_%u", i);
+				pcNode->mName.length = ::ai_snprintf(pcNode->mName.data, AI_MAXLEN, "cam_%u", i);
 				pScene->mCameras[i]->mName = pcNode->mName;
 			}
 		}

code/PostProcessing/RemoveRedundantMaterials.cpp

@@ -176,7 +176,7 @@ void RemoveRedundantMatsProcess::Execute( aiScene* pScene) {
             if (ppcMaterials[idx]) {
                 aiString sz;
                 if( ppcMaterials[idx]->Get(AI_MATKEY_NAME, sz) != AI_SUCCESS ) {
-                    sz.length = ::ai_snprintf(sz.data,MAXLEN,"JoinedMaterial_#%u",p);
+                    sz.length = ::ai_snprintf(sz.data, AI_MAXLEN,"JoinedMaterial_#%u",p);
                     ((aiMaterial*)ppcMaterials[idx])->AddProperty(&sz,AI_MATKEY_NAME);
                 }
             } else {

code/PostProcessing/SortByPTypeProcess.cpp

@@ -65,37 +65,47 @@ void SortByPTypeProcess::SetupProperties(const Importer *pImp) {
     mConfigRemoveMeshes = pImp->GetPropertyInteger(AI_CONFIG_PP_SBP_REMOVE, 0);
 }
 
+// ------------------------------------------------------------------------------------------------
+static void clearMeshesInNode(aiNode *node) {
+    delete[] node->mMeshes;
+    node->mNumMeshes = 0;
+    node->mMeshes = nullptr;
+}
+
 // ------------------------------------------------------------------------------------------------
 // Update changed meshes in all nodes
 void UpdateNodes(const std::vector<unsigned int> &replaceMeshIndex, aiNode *node) {
+    ai_assert(node != nullptr);
+    
     if (node->mNumMeshes) {
         unsigned int newSize = 0;
         for (unsigned int m = 0; m < node->mNumMeshes; ++m) {
             unsigned int add = node->mMeshes[m] << 2;
             for (unsigned int i = 0; i < 4; ++i) {
-                if (UINT_MAX != replaceMeshIndex[add + i]) ++newSize;
-            }
-        }
-        if (!newSize) {
-            delete[] node->mMeshes;
-            node->mNumMeshes = 0;
-            node->mMeshes = nullptr;
-        } else {
-            // Try to reuse the old array if possible
-            unsigned int *newMeshes = (newSize > node->mNumMeshes ? new unsigned int[newSize] : node->mMeshes);
-
-            for (unsigned int m = 0; m < node->mNumMeshes; ++m) {
-                unsigned int add = node->mMeshes[m] << 2;
-                for (unsigned int i = 0; i < 4; ++i) {
-                    if (UINT_MAX != replaceMeshIndex[add + i])
-                        *newMeshes++ = replaceMeshIndex[add + i];
+                if (UINT_MAX != replaceMeshIndex[add + i]) {
+                    ++newSize;
                 }
             }
-            if (newSize > node->mNumMeshes)
-                delete[] node->mMeshes;
-
-            node->mMeshes = newMeshes - (node->mNumMeshes = newSize);
         }
+        if (newSize == 0) {
+            clearMeshesInNode(node);
+            return;
+        }
+        
+        // Try to reuse the old array if possible
+        unsigned int *newMeshes = (newSize > node->mNumMeshes ? new unsigned int[newSize] : node->mMeshes);
+        for (unsigned int m = 0; m < node->mNumMeshes; ++m) {
+            unsigned int add = node->mMeshes[m] << 2;
+            for (unsigned int i = 0; i < 4; ++i) {
+                if (UINT_MAX != replaceMeshIndex[add + i]) {
+                    *newMeshes++ = replaceMeshIndex[add + i];
+                }
+            }
+        }
+        if (newSize > node->mNumMeshes) {
+            clearMeshesInNode(node);
+        }
+        node->mMeshes = newMeshes - (node->mNumMeshes = newSize);
     }
 
     // call all subnodes recursively
@@ -167,6 +177,10 @@ void SortByPTypeProcess::Execute(aiScene *pScene) {
         // with the largest number of primitives
         unsigned int aiNumPerPType[4] = { 0, 0, 0, 0 };
         aiFace *pFirstFace = mesh->mFaces;
+        if (pFirstFace == nullptr) {
+            continue;
+        }
+
         aiFace *const pLastFace = pFirstFace + mesh->mNumFaces;
 
         unsigned int numPolyVerts = 0;

code/PostProcessing/TriangulateProcess.cpp

@@ -192,13 +192,13 @@ bool TriangulateProcess::TriangulateMesh( aiMesh* pMesh) {
 
         for( unsigned int a = 0; a < pMesh->mNumFaces; a++) {
             const aiFace& face = pMesh->mFaces[a];
-
             if( face.mNumIndices != 3)  {
                 bNeed = true;
             }
         }
-        if (!bNeed)
+        if (!bNeed) {
             return false;
+        }
     }
     else if (!(pMesh->mPrimitiveTypes & aiPrimitiveType_POLYGON)) {
         return false;
@@ -213,8 +213,7 @@ bool TriangulateProcess::TriangulateMesh( aiMesh* pMesh) {
             get_normals = false;
         }
         if( face.mNumIndices <= 3) {
-            numOut++;
-
+            ++numOut;
         } else {
             numOut += face.mNumIndices-2;
             max_out = std::max(max_out,face.mNumIndices);
@@ -222,7 +221,10 @@ bool TriangulateProcess::TriangulateMesh( aiMesh* pMesh) {
     }
 
     // Just another check whether aiMesh::mPrimitiveTypes is correct
-    ai_assert(numOut != pMesh->mNumFaces);
+    if (numOut == pMesh->mNumFaces) {
+        ASSIMP_LOG_ERROR( "Invalidation detected in the number of indices: does not fit to the primitive type." );
+        return false;
+    }
     
     aiVector3D *nor_out = nullptr;
 

code/PostProcessing/ValidateDataStructure.cpp

@@ -371,20 +371,7 @@ void ValidateDSProcess::Validate(const aiMesh *pMesh) {
         ReportWarning("There are unreferenced vertices");
     }
 
-    // texture channel 2 may not be set if channel 1 is zero ...
-    {
-        unsigned int i = 0;
-        for (; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
-            if (!pMesh->HasTextureCoords(i)) break;
-        }
-        for (; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i)
-            if (pMesh->HasTextureCoords(i)) {
-                ReportError("Texture coordinate channel %i exists "
-                            "although the previous channel was nullptr.",
-                        i);
-            }
-    }
-    // the same for the vertex colors
+    // vertex color channel 2 may not be set if channel 1 is zero ...
     {
         unsigned int i = 0;
         for (; i < AI_MAX_NUMBER_OF_COLOR_SETS; ++i) {
@@ -904,14 +891,17 @@ void ValidateDSProcess::Validate(const aiNode *pNode) {
                 ReportError("aiNode \"%s\" child %i \"%s\" parent is someone else: \"%s\"", pNode->mName.C_Str(), i, pChild->mName.C_Str(), parentName);
             }
         }
+    } else if (pNode->mChildren) {
+        ReportError("aiNode::mChildren is not nullptr for empty node %s (aiNode::mNumChildren is %i)",
+                nodeName, pNode->mNumChildren);
     }
 }
 
 // ------------------------------------------------------------------------------------------------
 void ValidateDSProcess::Validate(const aiString *pString) {
-    if (pString->length > MAXLEN) {
+    if (pString->length > AI_MAXLEN) {
         ReportError("aiString::length is too large (%u, maximum is %lu)",
-                pString->length, MAXLEN);
+                pString->length, AI_MAXLEN);
     }
     const char *sz = pString->data;
     while (true) {
@@ -920,7 +910,7 @@ void ValidateDSProcess::Validate(const aiString *pString) {
                 ReportError("aiString::data is invalid: the terminal zero is at a wrong offset");
             }
             break;
-        } else if (sz >= &pString->data[MAXLEN]) {
+        } else if (sz >= &pString->data[AI_MAXLEN]) {
             ReportError("aiString::data is invalid. There is no terminal character");
         }
         ++sz;

contrib/poly2tri/LICENSE

@@ -1,7 +1,6 @@
-Poly2Tri Copyright (c) 2009-2010, Poly2Tri Contributors
-http://code.google.com/p/poly2tri/
-
+Copyright (c) 2009-2018, Poly2Tri Contributors
 All rights reserved.
+
 Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:
 

contrib/poly2tri/README

@@ -1,51 +0,0 @@
-==================
-INSTALLATION GUIDE
-==================
-
-------------
-Dependencies
-------------
-
-  Core poly2tri lib:
-  - Standard Template Library (STL)
-  
-  Testbed:
-  - gcc
-  - OpenGL
-  - GLFW (http://glfw.sf.net)
-  - Python
- 
-Waf (http://code.google.com/p/waf/) is used to compile the testbed.   
-A waf script (86kb) is included in the repositoty.
-
-----------------------------------------------
-Building the Testbed
-----------------------------------------------
-
-Posix/MSYS environment:
-
-  ./waf configure
-  ./waf build
-
-Windows command line:
-
-  python waf configure
-  python waf build
-
-----------------------------------------------
-Running the Examples
-----------------------------------------------
-
-Load data points from a file:
-p2t <filename> <center_x> <center_y> <zoom>
-
-Random distribution of points inside a consrained box:
-p2t random <num_points> <box_radius> <zoom>
-
-Examples:
-
-  ./p2t dude.dat 300 500 2
-  ./p2t nazca_monkey.dat 0 0 9
-  
-  ./p2t random 10 100 5.0
-  ./p2t random 1000 20000 0.025

contrib/poly2tri/README.md

@@ -0,0 +1,101 @@
+Since there are no Input validation of the data given for triangulation you need
+to think about this. Poly2Tri does not support repeat points within epsilon.
+
+* If you have a cyclic function that generates random points make sure you don't
+  add the same coordinate twice.
+* If you are given input and aren't sure same point exist twice you need to
+  check for this yourself.
+* Only simple polygons are supported. You may add holes or interior Steiner points
+* Interior holes must not touch other holes, nor touch the polyline boundary
+* Use the library in this order:
+  1. Initialize CDT with a simple polyline (this defines the constrained edges)
+  2. Add holes if necessary (also simple polylines)
+  3. Add Steiner points
+  4. Triangulate
+
+Make sure you understand the preceding notice before posting an issue. If you have
+an issue not covered by the above, include your data-set with the problem.
+The only easy day was yesterday; have a nice day. <Mason Green>
+
+TESTBED INSTALLATION GUIDE
+==========================
+
+Dependencies
+------------
+
+Core poly2tri lib:
+
+* Standard Template Library (STL)
+
+Unit tests:
+* Boost (filesystem, test framework)
+
+Testbed:
+
+* OpenGL
+* [GLFW](http://glfw.sf.net)
+
+Build the library
+-----------------
+
+With the ninja build system installed:
+
+```
+mkdir build && cd build
+cmake -GNinja ..
+cmake --build .
+```
+
+Build and run with unit tests
+----------------------------
+
+With the ninja build system:
+
+```
+mkdir build && cd build
+cmake -GNinja -DP2T_BUILD_TESTS=ON ..
+cmake --build .
+ctest --output-on-failure
+```
+
+Build with the testbed
+-----------------
+
+```
+mkdir build && cd build
+cmake -GNinja -DP2T_BUILD_TESTBED=ON ..
+cmake --build .
+```
+
+Running the Examples
+--------------------
+
+Load data points from a file:
+```
+build/testbed/p2t <filename> <center_x> <center_y> <zoom>
+```
+Load data points from a file and automatically fit the geometry to the window:
+```
+build/testbed/p2t <filename>
+```
+Random distribution of points inside a constrained box:
+```
+build/testbed/p2t random <num_points> <box_radius> <zoom>
+```
+Examples:
+```
+build/testbed/p2t testbed/data/dude.dat 350 500 3
+
+build/testbed/p2t testbed/data/nazca_monkey.dat
+
+build/testbed/p2t random 10 100 5.0
+build/testbed/p2t random 1000 20000 0.025
+```
+
+References
+==========
+
+- Domiter V. and Zalik B. (2008) Sweep‐line algorithm for constrained Delaunay triangulation
+- FlipScan by library author Thomas Åhlén
+
+![FlipScan](doc/FlipScan.png)

contrib/poly2tri/poly2tri/common/dll_symbol.h

@@ -0,0 +1,61 @@
+/*
+ * Poly2Tri Copyright (c) 2009-2022, Poly2Tri Contributors
+ * https://github.com/jhasse/poly2tri
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * * Neither the name of Poly2Tri nor the names of its contributors may be
+ *   used to endorse or promote products derived from this software without specific
+ *   prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 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.
+ */
+
+#pragma once
+
+#if defined(_MSC_VER)
+#  pragma warning( disable: 4273)
+#  define P2T_COMPILER_DLLEXPORT __declspec(dllexport)
+#  define P2T_COMPILER_DLLIMPORT __declspec(dllimport)
+#elif defined(__GNUC__)
+#  define P2T_COMPILER_DLLEXPORT __attribute__ ((visibility ("default")))
+#  define P2T_COMPILER_DLLIMPORT __attribute__ ((visibility ("default")))
+#else
+#  define P2T_COMPILER_DLLEXPORT
+#  define P2T_COMPILER_DLLIMPORT
+#endif
+
+// We need to enable shard linkage explicitely
+#ifdef ASSIMP_BUILD_DLL_EXPORT
+#  define P2T_SHARED_EXPORTS 1
+#endif
+
+#ifndef P2T_DLL_SYMBOL
+#  if defined(P2T_STATIC_EXPORTS)
+#    define P2T_DLL_SYMBOL
+#  elif defined(P2T_SHARED_EXPORTS)
+#    define P2T_DLL_SYMBOL P2T_COMPILER_DLLEXPORT
+#  elif defined(BUILD_SHARED_LIBS)
+#    define P2T_DLL_SYMBOL P2T_COMPILER_DLLIMPORT
+#  else
+#    define P2T_DLL_SYMBOL
+#  endif
+#endif

contrib/poly2tri/poly2tri/common/shapes.cc

@@ -1,6 +1,6 @@
 /*
- * Poly2Tri Copyright (c) 2009-2010, Poly2Tri Contributors
- * http://code.google.com/p/poly2tri/
+ * Poly2Tri Copyright (c) 2009-2018, Poly2Tri Contributors
+ * https://github.com/jhasse/poly2tri
  *
  * All rights reserved.
  *
@@ -29,14 +29,24 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #include "shapes.h"
+
+#include <cassert>
 #include <iostream>
 
 namespace p2t {
 
+Point::Point(double x, double y) : x(x), y(y)
+{
+}
+
+std::ostream& operator<<(std::ostream& out, const Point& point) {
+  return out << point.x << "," << point.y;
+}
+
 Triangle::Triangle(Point& a, Point& b, Point& c)
 {
   points_[0] = &a; points_[1] = &b; points_[2] = &c;
-  neighbors_[0] = NULL; neighbors_[1] = NULL; neighbors_[2] = NULL;
+  neighbors_[0] = nullptr; neighbors_[1] = nullptr; neighbors_[2] = nullptr;
   constrained_edge[0] = constrained_edge[1] = constrained_edge[2] = false;
   delaunay_edge[0] = delaunay_edge[1] = delaunay_edge[2] = false;
   interior_ = false;
@@ -76,39 +86,37 @@ void Triangle::MarkNeighbor(Triangle& t)
 void Triangle::Clear()
 {
     Triangle *t;
-    for( int i=0; i<3; i++ )
-    {
-        t = neighbors_[i];
-        if( t != NULL )
-        {
-            t->ClearNeighbor( this );
-        }
+    for (auto& neighbor : neighbors_) {
+      t = neighbor;
+      if (t != nullptr) {
+        t->ClearNeighbor(this);
+      }
     }
     ClearNeighbors();
-    points_[0]=points_[1]=points_[2] = NULL;
+    points_[0]=points_[1]=points_[2] = nullptr;
 }
 
 void Triangle::ClearNeighbor(const Triangle *triangle )
 {
     if( neighbors_[0] == triangle )
     {
-        neighbors_[0] = NULL;
+        neighbors_[0] = nullptr;
     }
     else if( neighbors_[1] == triangle )
     {
-        neighbors_[1] = NULL;
+        neighbors_[1] = nullptr;
     }
     else
     {
-        neighbors_[2] = NULL;
+        neighbors_[2] = nullptr;
     }
 }
 
 void Triangle::ClearNeighbors()
 {
-  neighbors_[0] = NULL;
-  neighbors_[1] = NULL;
-  neighbors_[2] = NULL;
+  neighbors_[0] = nullptr;
+  neighbors_[1] = nullptr;
+  neighbors_[2] = nullptr;
 }
 
 void Triangle::ClearDelunayEdges()
@@ -220,7 +228,7 @@ Point* Triangle::PointCW(const Point& point)
     return points_[1];
   }
   assert(0);
-  return NULL;
+  return nullptr;
 }
 
 // The point counter-clockwise to given point
@@ -234,7 +242,18 @@ Point* Triangle::PointCCW(const Point& point)
     return points_[0];
   }
   assert(0);
-  return NULL;
+  return nullptr;
+}
+
+// The neighbor across to given point
+Triangle* Triangle::NeighborAcross(const Point& point)
+{
+  if (&point == points_[0]) {
+    return neighbors_[0];
+  } else if (&point == points_[1]) {
+    return neighbors_[1];
+  }
+  return neighbors_[2];
 }
 
 // The neighbor clockwise to given point
@@ -343,23 +362,50 @@ void Triangle::SetDelunayEdgeCW(const Point& p, bool e)
   }
 }
 
-// The neighbor across to given point
-Triangle& Triangle::NeighborAcross(const Point& opoint)
-{
-  if (&opoint == points_[0]) {
-    return *neighbors_[0];
-  } else if (&opoint == points_[1]) {
-    return *neighbors_[1];
-  }
-  return *neighbors_[2];
-}
-
 void Triangle::DebugPrint()
 {
-  using namespace std;
-  cout << points_[0]->x << "," << points_[0]->y << " ";
-  cout << points_[1]->x << "," << points_[1]->y << " ";
-  cout << points_[2]->x << "," << points_[2]->y << endl;
+  std::cout << *points_[0] << " " << *points_[1] << " " << *points_[2] << std::endl;
 }
 
+bool Triangle::CircumcicleContains(const Point& point) const
+{
+  assert(IsCounterClockwise());
+  const double dx = points_[0]->x - point.x;
+  const double dy = points_[0]->y - point.y;
+  const double ex = points_[1]->x - point.x;
+  const double ey = points_[1]->y - point.y;
+  const double fx = points_[2]->x - point.x;
+  const double fy = points_[2]->y - point.y;
+
+  const double ap = dx * dx + dy * dy;
+  const double bp = ex * ex + ey * ey;
+  const double cp = fx * fx + fy * fy;
+
+  return (dx * (fy * bp - cp * ey) - dy * (fx * bp - cp * ex) + ap * (fx * ey - fy * ex)) < 0;
 }
+
+bool Triangle::IsCounterClockwise() const
+{
+  return (points_[1]->x - points_[0]->x) * (points_[2]->y - points_[0]->y) -
+             (points_[2]->x - points_[0]->x) * (points_[1]->y - points_[0]->y) >
+         0;
+}
+
+bool IsDelaunay(const std::vector<p2t::Triangle*>& triangles)
+{
+  for (const auto triangle : triangles) {
+    for (const auto other : triangles) {
+      if (triangle == other) {
+        continue;
+      }
+      for (int i = 0; i < 3; ++i) {
+        if (triangle->CircumcicleContains(*other->GetPoint(i))) {
+          return false;
+        }
+      }
+    }
+  }
+  return true;
+}
+
+} // namespace p2t

contrib/poly2tri/poly2tri/common/shapes.h

@@ -1,6 +1,6 @@
 /*
- * Poly2Tri Copyright (c) 2009-2010, Poly2Tri Contributors
- * http://code.google.com/p/poly2tri/
+ * Poly2Tri Copyright (c) 2009-2018, Poly2Tri Contributors
+ * https://github.com/jhasse/poly2tri
  *
  * All rights reserved.
  *
@@ -29,22 +29,24 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-// Include guard
-#ifndef SHAPES_H
-#define SHAPES_H
+#pragma once
 
-#include <vector>
+#include "dll_symbol.h"
+
+#include <cmath>
 #include <cstddef>
 #include <stdexcept>
-#include <assert.h>
-#include <cmath>
-#include <string>
+#include <vector>
 
+
+#if defined(_WIN32)
+#  pragma warning( disable: 4251)
+#endif
 namespace p2t {
 
 struct Edge;
 
-struct Point {
+struct P2T_DLL_SYMBOL Point {
 
   double x, y;
 
@@ -59,7 +61,7 @@ struct Point {
   std::vector<Edge*> edge_list;
 
   /// Construct using coordinates.
-  Point(double x, double y) : x(x), y(y) {}
+  Point(double x, double y);
 
   /// Set this point to all zeros.
   void set_zero()
@@ -121,8 +123,10 @@ struct Point {
 
 };
 
+P2T_DLL_SYMBOL std::ostream& operator<<(std::ostream&, const Point&);
+
 // Represents a simple polygon's edge
-struct Edge {
+struct P2T_DLL_SYMBOL Edge {
 
   Point* p, *q;
 
@@ -138,9 +142,7 @@ struct Edge {
         p = &p2;
       } else if (p1.x == p2.x) {
         // Repeat points
-        // ASSIMP_CHANGE (aramis_acg)
-        throw std::runtime_error(std::string("repeat points"));
-        //assert(false);
+        throw std::runtime_error("Edge::Edge: p1 == p2");
       }
     }
 
@@ -151,7 +153,7 @@ struct Edge {
 // Triangle-based data structures are know to have better performance than quad-edge structures
 // See: J. Shewchuk, "Triangle: Engineering a 2D Quality Mesh Generator and Delaunay Triangulator"
 //      "Triangulations in CGAL"
-class Triangle {
+class P2T_DLL_SYMBOL Triangle {
 public:
 
 /// Constructor
@@ -178,6 +180,7 @@ void MarkConstrainedEdge(Point* p, Point* q);
 int Index(const Point* p);
 int EdgeIndex(const Point* p1, const Point* p2);
 
+Triangle* NeighborAcross(const Point& point);
 Triangle* NeighborCW(const Point& point);
 Triangle* NeighborCCW(const Point& point);
 bool GetConstrainedEdgeCCW(const Point& p);
@@ -205,12 +208,14 @@ void ClearDelunayEdges();
 inline bool IsInterior();
 inline void IsInterior(bool b);
 
-Triangle& NeighborAcross(const Point& opoint);
-
 void DebugPrint();
 
+bool CircumcicleContains(const Point&) const;
+
 private:
 
+bool IsCounterClockwise() const;
+
 /// Triangle points
 Point* points_[3];
 /// Neighbor list
@@ -258,7 +263,7 @@ inline bool operator ==(const Point& a, const Point& b)
 
 inline bool operator !=(const Point& a, const Point& b)
 {
-  return !(a.x == b.x) && !(a.y == b.y);
+  return !(a.x == b.x) || !(a.y == b.y);
 }
 
 /// Peform the dot product on two vectors.
@@ -322,6 +327,7 @@ inline void Triangle::IsInterior(bool b)
   interior_ = b;
 }
 
-}
+/// Is this set a valid delaunay triangulation?
+P2T_DLL_SYMBOL bool IsDelaunay(const std::vector<p2t::Triangle*>&);
 
-#endif
+}

contrib/poly2tri/poly2tri/common/utils.h

@@ -1,6 +1,6 @@
 /*
- * Poly2Tri Copyright (c) 2009-2010, Poly2Tri Contributors
- * http://code.google.com/p/poly2tri/
+ * Poly2Tri Copyright (c) 2009-2018, Poly2Tri Contributors
+ * https://github.com/jhasse/poly2tri
  *
  * All rights reserved.
  *
@@ -29,14 +29,15 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef UTILS_H
-#define UTILS_H
+#pragma once
 
 // Otherwise #defines like M_PI are undeclared under Visual Studio
 #define _USE_MATH_DEFINES
 
+#include "shapes.h"
+
+#include <cmath>
 #include <exception>
-#include <math.h>
 
 // C99 removes M_PI from math.h
 #ifndef M_PI
@@ -66,7 +67,11 @@ Orientation Orient2d(const Point& pa, const Point& pb, const Point& pc)
   double detleft = (pa.x - pc.x) * (pb.y - pc.y);
   double detright = (pa.y - pc.y) * (pb.x - pc.x);
   double val = detleft - detright;
-  if (val > -EPSILON && val < EPSILON) {
+
+// Using a tolerance here fails on concave-by-subepsilon boundaries
+//   if (val > -EPSILON && val < EPSILON) {
+// Using == on double makes -Wfloat-equal warnings yell at us
+  if (std::fpclassify(val) == FP_ZERO) {
     return COLLINEAR;
   } else if (val > 0) {
     return CCW;
@@ -123,5 +128,3 @@ bool InScanArea(const Point& pa, const Point& pb, const Point& pc, const Point&
 }
 
 }
-
-#endif

contrib/poly2tri/poly2tri/poly2tri.h

@@ -1,6 +1,6 @@
 /*
- * Poly2Tri Copyright (c) 2009-2010, Poly2Tri Contributors
- * http://code.google.com/p/poly2tri/
+ * Poly2Tri Copyright (c) 2009-2018, Poly2Tri Contributors
+ * https://github.com/jhasse/poly2tri
  *
  * All rights reserved.
  *
@@ -29,10 +29,7 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef POLY2TRI_H
-#define POLY2TRI_H
+#pragma once
 
 #include "common/shapes.h"
 #include "sweep/cdt.h"
-
-#endif

contrib/poly2tri/poly2tri/sweep/advancing_front.cc

@@ -1,6 +1,6 @@
 /*
- * Poly2Tri Copyright (c) 2009-2010, Poly2Tri Contributors
- * http://code.google.com/p/poly2tri/
+ * Poly2Tri Copyright (c) 2009-2018, Poly2Tri Contributors
+ * https://github.com/jhasse/poly2tri
  *
  * All rights reserved.
  *
@@ -30,6 +30,8 @@
  */
 #include "advancing_front.h"
 
+#include <cassert>
+
 namespace p2t {
 
 AdvancingFront::AdvancingFront(Node& head, Node& tail)
@@ -44,21 +46,21 @@ Node* AdvancingFront::LocateNode(double x)
   Node* node = search_node_;
 
   if (x < node->value) {
-    while ((node = node->prev) != NULL) {
+    while ((node = node->prev) != nullptr) {
       if (x >= node->value) {
         search_node_ = node;
         return node;
       }
     }
   } else {
-    while ((node = node->next) != NULL) {
+    while ((node = node->next) != nullptr) {
       if (x < node->value) {
         search_node_ = node->prev;
         return node->prev;
       }
     }
   }
-  return NULL;
+  return nullptr;
 }
 
 Node* AdvancingFront::FindSearchNode(double x)
@@ -86,13 +88,13 @@ Node* AdvancingFront::LocatePoint(const Point* point)
       }
     }
   } else if (px < nx) {
-    while ((node = node->prev) != NULL) {
+    while ((node = node->prev) != nullptr) {
       if (point == node->point) {
         break;
       }
     }
   } else {
-    while ((node = node->next) != NULL) {
+    while ((node = node->next) != nullptr) {
       if (point == node->point)
         break;
     }
@@ -105,4 +107,4 @@ AdvancingFront::~AdvancingFront()
 {
 }
 
-}
+} // namespace p2t

contrib/poly2tri/poly2tri/sweep/advancing_front.h

@@ -1,6 +1,6 @@
 /*
- * Poly2Tri Copyright (c) 2009-2010, Poly2Tri Contributors
- * http://code.google.com/p/poly2tri/
+ * Poly2Tri Copyright (c) 2009-2018, Poly2Tri Contributors
+ * https://github.com/jhasse/poly2tri
  *
  * All rights reserved.
  *
@@ -29,8 +29,7 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef ADVANCED_FRONT_H
-#define ADVANCED_FRONT_H
+#pragma once
 
 #include "../common/shapes.h"
 
@@ -114,5 +113,3 @@ inline void AdvancingFront::set_search(Node* node)
 }
 
 }
-
-#endif