Rollup to 'upstream/master'

.github/workflows/ccpp.yml

@@ -45,15 +45,45 @@ jobs:
         CXX: ${{ matrix.cxx }}
         CC: ${{ matrix.cc }}
 
+    - name: Cache DX SDK
+      id: dxcache
+      if: matrix.name == 'windows-msvc'
+      uses: actions/cache@v2
+      with:
+        path: '${{ github.workspace }}/DX_SDK'
+        key: ${{ runner.os }}-DX_SDK
+        restore-keys: |
+          ${{ runner.os }}-DX_SDK
+
+    - name: Download DXSetup
+      if: matrix.name == 'windows-msvc' && steps.dxcache.outputs.cache-hit != 'true'
+      run: |
+        curl -s -o DXSDK_Jun10.exe --location https://download.microsoft.com/download/A/E/7/AE743F1F-632B-4809-87A9-AA1BB3458E31/DXSDK_Jun10.exe
+        cmd.exe /c start /wait .\DXSDK_Jun10.exe /U /O /F /S /P "${{ github.workspace }}\DX_SDK"
+
+    - name: Set Windows specific CMake arguments
+      if: matrix.name == 'windows-msvc'
+      id: windows_extra_cmake_args
+      run: echo "::set-output name=args::'-DASSIMP_BUILD_ASSIMP_TOOLS=1 -DASSIMP_BUILD_ASSIMP_VIEW=1'"
+    
     - name: configure and build
       uses: lukka/run-cmake@v2
+      env:
+        DXSDK_DIR: '${{ github.workspace }}/DX_SDK'
+
       with:
         cmakeListsOrSettingsJson: CMakeListsTxtAdvanced
         cmakeListsTxtPath: '${{ github.workspace }}/CMakeLists.txt'
-        cmakeAppendedArgs: '-GNinja -DCMAKE_BUILD_TYPE=Release'
+        cmakeAppendedArgs: '-GNinja -DCMAKE_BUILD_TYPE=Release ${{ steps.windows_extra_cmake_args.outputs.args }}'
         buildWithCMakeArgs: '-- -v'
         buildDirectory: '${{ github.workspace }}/build/'
         
     - name: test
       run: cd build/bin && ./unit
       shell: bash
+
+    - uses: actions/upload-artifact@v2
+      if: matrix.name == 'windows-msvc'
+      with:
+        name: 'assimp-bins-${{ matrix.name }}-${{ github.sha }}'
+        path: build/bin

code/AssetLib/3DS/3DSHelper.h

@@ -321,7 +321,7 @@ public:
 struct Face : public FaceWithSmoothingGroup {
 };
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #pragma warning(disable : 4315)
 #endif
 

code/AssetLib/AC/ACLoader.cpp

@@ -484,6 +484,12 @@ aiNode *AC3DImporter::ConvertObjectSection(Object &object,
                     needMat[idx].second += ((unsigned int)(*it).entries.size() - 1) << 1u;
                     break;
 
+                    // triangle strip
+                case 0x4:
+                    needMat[idx].first += (unsigned int)(*it).entries.size() - 2;
+                    needMat[idx].second += ((unsigned int)(*it).entries.size() - 2) * 3;
+                    break;
+
                     // 0 == polygon, else unknown
                 default:
                     if ((*it).flags & 0xf) {
@@ -570,6 +576,64 @@ aiNode *AC3DImporter::ConvertObjectSection(Object &object,
                                     }
                                 }
                             }
+                        } else if (type == 0x4) {
+                            for (unsigned int i = 0; i < (unsigned int)src.entries.size() - 2; ++i) {
+                                const Surface::SurfaceEntry &entry1 = src.entries[i];
+                                const Surface::SurfaceEntry &entry2 = src.entries[i + 1];
+                                const Surface::SurfaceEntry &entry3 = src.entries[i + 2];
+
+                                // skip degenerate triangles
+                                if (object.vertices[entry1.first] == object.vertices[entry2.first] ||
+                                    object.vertices[entry1.first] == object.vertices[entry3.first] ||
+                                    object.vertices[entry2.first] == object.vertices[entry3.first]) {
+                                    mesh->mNumFaces--;
+                                    mesh->mNumVertices -= 3;
+                                    continue;
+                                }
+
+                                aiFace &face = *faces++;
+                                face.mNumIndices = 3;
+                                face.mIndices = new unsigned int[face.mNumIndices];
+                                face.mIndices[0] = cur++;
+                                face.mIndices[1] = cur++;
+                                face.mIndices[2] = cur++;
+                                if (!(i & 1)) {
+                                    *vertices++ = object.vertices[entry1.first] + object.translation;
+                                    if (uv) {
+                                        uv->x = entry1.second.x;
+                                        uv->y = entry1.second.y;
+                                        ++uv;
+                                    }
+                                    *vertices++ = object.vertices[entry2.first] + object.translation;
+                                    if (uv) {
+                                        uv->x = entry2.second.x;
+                                        uv->y = entry2.second.y;
+                                        ++uv;
+                                    }
+                                } else {
+                                    *vertices++ = object.vertices[entry2.first] + object.translation;
+                                    if (uv) {
+                                        uv->x = entry2.second.x;
+                                        uv->y = entry2.second.y;
+                                        ++uv;
+                                    }
+                                    *vertices++ = object.vertices[entry1.first] + object.translation;
+                                    if (uv) {
+                                        uv->x = entry1.second.x;
+                                        uv->y = entry1.second.y;
+                                        ++uv;
+                                    }
+                                }
+                                if (static_cast<unsigned>(vertices - mesh->mVertices) >= mesh->mNumVertices) {
+                                    throw DeadlyImportError("AC3D: Invalid number of vertices");
+                                }
+                                *vertices++ = object.vertices[entry3.first] + object.translation;
+                                if (uv) {
+                                    uv->x = entry3.second.x;
+                                    uv->y = entry3.second.y;
+                                    ++uv;
+                                }
+                            }
                         } else {
 
                             it2 = (*it).entries.begin();

code/AssetLib/FBX/FBXConverter.cpp

@@ -1988,6 +1988,7 @@ void FBXConverter::SetTextureProperties(aiMaterial *out_mat, const TextureMap &_
     TrySetTextureProperties(out_mat, _textures, "ShininessExponent", aiTextureType_SHININESS, mesh);
     TrySetTextureProperties(out_mat, _textures, "TransparencyFactor", aiTextureType_OPACITY, mesh);
     TrySetTextureProperties(out_mat, _textures, "EmissiveFactor", aiTextureType_EMISSIVE, mesh);
+    TrySetTextureProperties(out_mat, _textures, "ReflectionFactor", aiTextureType_METALNESS, mesh);
     //Maya counterparts
     TrySetTextureProperties(out_mat, _textures, "Maya|DiffuseTexture", aiTextureType_DIFFUSE, mesh);
     TrySetTextureProperties(out_mat, _textures, "Maya|NormalTexture", aiTextureType_NORMALS, mesh);

code/AssetLib/FBX/FBXExporter.cpp

@@ -400,6 +400,65 @@ void FBXExporter::WriteHeaderExtension ()
     );
 }
 
+// WriteGlobalSettings helpers
+
+void WritePropInt(const aiScene* scene, FBX::Node& p, const std::string& key, int defaultValue)
+{
+    int value;
+    if (scene->mMetaData->Get(key, value)) {
+        p.AddP70int(key, value);
+    } else {
+        p.AddP70int(key, defaultValue);
+    }
+}
+
+void WritePropDouble(const aiScene* scene, FBX::Node& p, const std::string& key, double defaultValue)
+{
+    double value;
+    if (scene->mMetaData->Get(key, value)) {
+        p.AddP70double(key, value);
+    } else {
+        // fallback lookup float instead
+        float floatValue;
+        if (scene->mMetaData->Get(key, floatValue)) {
+            p.AddP70double(key, (double)floatValue);
+        } else {
+            p.AddP70double(key, defaultValue);
+        }
+    }
+}
+
+void WritePropEnum(const aiScene* scene, FBX::Node& p, const std::string& key, int defaultValue)
+{
+    int value;
+    if (scene->mMetaData->Get(key, value)) {
+        p.AddP70enum(key, value);
+    } else {
+        p.AddP70enum(key, defaultValue);
+    }
+}
+
+void WritePropColor(const aiScene* scene, FBX::Node& p, const std::string& key, const aiVector3D& defaultValue)
+{
+    aiVector3D value;
+    if (scene->mMetaData->Get(key, value)) {
+        // ai_real can be float or double, cast to avoid warnings
+        p.AddP70color(key, (double)value.x, (double)value.y, (double)value.z);
+    } else {
+        p.AddP70color(key, (double)defaultValue.x, (double)defaultValue.y, (double)defaultValue.z);
+    }
+}
+
+void WritePropString(const aiScene* scene, FBX::Node& p, const std::string& key, const std::string& defaultValue)
+{
+    aiString value; // MetaData doesn't hold std::string
+    if (scene->mMetaData->Get(key, value)) {
+        p.AddP70string(key, value.C_Str());
+    } else {
+        p.AddP70string(key, defaultValue);
+    }
+}
+
 void FBXExporter::WriteGlobalSettings ()
 {
     if (!binary) {
@@ -409,26 +468,26 @@ void FBXExporter::WriteGlobalSettings ()
     gs.AddChild("Version", int32_t(1000));
 
     FBX::Node p("Properties70");
-    p.AddP70int("UpAxis", 1);
+    WritePropInt(mScene, p, "UpAxis", 1);
-    p.AddP70int("UpAxisSign", 1);
+    WritePropInt(mScene, p, "UpAxisSign", 1);
-    p.AddP70int("FrontAxis", 2);
+    WritePropInt(mScene, p, "FrontAxis", 2);
-    p.AddP70int("FrontAxisSign", 1);
+    WritePropInt(mScene, p, "FrontAxisSign", 1);
-    p.AddP70int("CoordAxis", 0);
+    WritePropInt(mScene, p, "CoordAxis", 0);
-    p.AddP70int("CoordAxisSign", 1);
+    WritePropInt(mScene, p, "CoordAxisSign", 1);
-    p.AddP70int("OriginalUpAxis", 1);
+    WritePropInt(mScene, p, "OriginalUpAxis", 1);
-    p.AddP70int("OriginalUpAxisSign", 1);
+    WritePropInt(mScene, p, "OriginalUpAxisSign", 1);
-    p.AddP70double("UnitScaleFactor", 1.0);
+    WritePropDouble(mScene, p, "UnitScaleFactor", 1.0);
-    p.AddP70double("OriginalUnitScaleFactor", 1.0);
+    WritePropDouble(mScene, p, "OriginalUnitScaleFactor", 1.0);
-    p.AddP70color("AmbientColor", 0.0, 0.0, 0.0);
+    WritePropColor(mScene, p, "AmbientColor", aiVector3D((ai_real)0.0, (ai_real)0.0, (ai_real)0.0));
-    p.AddP70string("DefaultCamera", "Producer Perspective");
+    WritePropString(mScene, p,"DefaultCamera", "Producer Perspective");
-    p.AddP70enum("TimeMode", 11);
+    WritePropEnum(mScene, p, "TimeMode", 11);
-    p.AddP70enum("TimeProtocol", 2);
+    WritePropEnum(mScene, p, "TimeProtocol", 2);
-    p.AddP70enum("SnapOnFrameMode", 0);
+    WritePropEnum(mScene, p, "SnapOnFrameMode", 0);
     p.AddP70time("TimeSpanStart", 0); // TODO: animation support
     p.AddP70time("TimeSpanStop", FBX::SECOND); // TODO: animation support
-    p.AddP70double("CustomFrameRate", -1.0);
+    WritePropDouble(mScene, p, "CustomFrameRate", -1.0);
     p.AddP70("TimeMarker", "Compound", "", ""); // not sure what this is
-    p.AddP70int("CurrentTimeMarker", -1);
+    WritePropInt(mScene, p, "CurrentTimeMarker", -1);
     gs.AddChild(p);
 
     gs.Dump(outfile, binary, 0);

code/AssetLib/IFC/IFCReaderGen_2x3.h

@@ -45,7 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "AssetLib/Step/STEPFile.h"
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #    pragma warning( disable : 4512 )
 #endif // _WIN32
 

code/AssetLib/M3D/m3d.h

@@ -85,7 +85,9 @@ typedef uint16_t M3D_INDEX;
 #define M3D_BONEMAXLEVEL 8
 #endif
 #ifndef _MSC_VER
+#ifndef _inline
 #define _inline __inline__
+#endif
 #define _pack __attribute__((packed))
 #define _unused __attribute__((unused))
 #else
@@ -99,7 +101,7 @@ typedef uint16_t M3D_INDEX;
 #define _register
 #endif
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #    pragma warning(push)
 #    pragma warning(disable : 4100 4127 4189 4505 4244 4403  4701 4703)
 #    if (_MSC_VER > 1800 )

code/AssetLib/MDL/HalfLife/HL1MDLLoader.cpp

@@ -68,7 +68,7 @@ namespace Assimp {
 namespace MDL {
 namespace HalfLife {
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #    pragma warning(disable : 4706)
 #endif // _WIN32
 

code/AssetLib/Step/STEPFile.h

@@ -54,7 +54,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <assimp/DefaultLogger.hpp>
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #    pragma warning(push)
 #    pragma warning(disable : 4127 4456 4245 4512 )
 #endif // _WIN32 
@@ -727,7 +727,7 @@ struct InternGenericConvert<Maybe<T>> {
     }
 };
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #pragma warning(push)
 #pragma warning(disable : 4127)
 #endif // _WIN32
@@ -960,7 +960,7 @@ private:
     const EXPRESS::ConversionSchema *schema;
 };
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #pragma warning(pop)
 #endif // _WIN32
 

code/AssetLib/glTF/glTFAsset.h

@@ -1,4 +1,4 @@
-/*
+/*
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
@@ -49,7 +49,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef GLTFASSET_H_INC
 #define GLTFASSET_H_INC
 
-#ifndef ASSIMP_BUILD_NO_GLTF_IMPORTER
+#if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF1_IMPORTER)
 
 #include <assimp/Exceptional.h>
 

code/AssetLib/glTF/glTFAssetWriter.h

@@ -50,7 +50,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef GLTFASSETWRITER_H_INC
 #define GLTFASSETWRITER_H_INC
 
-#ifndef ASSIMP_BUILD_NO_GLTF_IMPORTER
+#if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF1_IMPORTER)
 
 #include "glTFAsset.h"
 

code/AssetLib/glTF/glTFExporter.h

@@ -46,7 +46,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef AI_GLTFEXPORTER_H_INC
 #define AI_GLTFEXPORTER_H_INC
 
-#ifndef ASSIMP_BUILD_NO_GLTF_EXPORTER
+#if !defined(ASSIMP_BUILD_NO_GLTF_EXPORTER) && !defined(ASSIMP_BUILD_NO_GLTF1_EXPORTER)
 
 #include <assimp/types.h>
 #include <assimp/material.h>

code/AssetLib/glTF/glTFImporter.cpp

@@ -1,4 +1,4 @@
-/*
+/*
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
@@ -39,7 +39,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ----------------------------------------------------------------------
 */
 
-#ifndef ASSIMP_BUILD_NO_GLTF_IMPORTER
+#if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF1_IMPORTER)
 
 #include "AssetLib/glTF/glTFImporter.h"
 #include "AssetLib/glTF/glTFAsset.h"

code/AssetLib/glTF2/glTF2Asset.h

@@ -1,4 +1,4 @@
-/*
+/*
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
@@ -50,7 +50,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef GLTF2ASSET_H_INC
 #define GLTF2ASSET_H_INC
 
-#ifndef ASSIMP_BUILD_NO_GLTF_IMPORTER
+#if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF2_IMPORTER)
 
 #include <assimp/Exceptional.h>
 
@@ -406,6 +406,8 @@ struct Accessor : public Object {
     void ExtractData(T *&outData);
 
     void WriteData(size_t count, const void *src_buffer, size_t src_stride);
+    void WriteSparseValues(size_t count, const void *src_data, size_t src_dataStride);
+    void WriteSparseIndices(size_t count, const void *src_idx, size_t src_idxStride);
 
     //! Helper class to iterate the data
     class Indexer {
@@ -1066,6 +1068,7 @@ public:
     } extensionsRequired;
 
     AssetMetadata asset;
+    Value* extras = nullptr;
 
     // Dictionaries for each type of object
 

code/AssetLib/glTF2/glTF2Asset.inl

@@ -757,6 +757,33 @@ inline void Accessor::WriteData(size_t _count, const void *src_buffer, size_t sr
     CopyData(_count, src, src_stride, dst, dst_stride);
 }
 
+inline void Accessor::WriteSparseValues(size_t _count, const void *src_data, size_t src_dataStride) {
+    if (!sparse)
+        return;
+
+    // values
+    uint8_t *value_buffer_ptr = sparse->values->buffer->GetPointer();
+    size_t value_offset = sparse->valuesByteOffset + sparse->values->byteOffset;
+    size_t value_dst_stride = GetNumComponents() * GetBytesPerComponent();
+    const uint8_t *value_src = reinterpret_cast<const uint8_t *>(src_data);
+    uint8_t *value_dst = reinterpret_cast<uint8_t *>(value_buffer_ptr + value_offset);
+    ai_assert(value_dst + _count * value_dst_stride <= value_buffer_ptr + sparse->values->buffer->byteLength);
+    CopyData(_count, value_src, src_dataStride, value_dst, value_dst_stride);
+}
+
+inline void Accessor::WriteSparseIndices(size_t _count, const void *src_idx, size_t src_idxStride) {
+    if (!sparse)
+        return;
+
+    // indices
+    uint8_t *indices_buffer_ptr = sparse->indices->buffer->GetPointer();
+    size_t indices_offset = sparse->indicesByteOffset + sparse->indices->byteOffset;
+    size_t indices_dst_stride = 1 * sizeof(unsigned short);
+    const uint8_t *indices_src = reinterpret_cast<const uint8_t *>(src_idx);
+    uint8_t *indices_dst = reinterpret_cast<uint8_t *>(indices_buffer_ptr + indices_offset);
+    ai_assert(indices_dst + _count * indices_dst_stride <= indices_buffer_ptr + sparse->indices->buffer->byteLength);
+    CopyData(_count, indices_src, src_idxStride, indices_dst, indices_dst_stride);
+}
 inline Accessor::Indexer::Indexer(Accessor &acc) :
         accessor(acc),
         data(acc.GetPointer()),
@@ -1287,6 +1314,8 @@ inline void Node::Read(Value &obj, Asset &r) {
         }
     }
 
+	// Do not retrieve a skin here, just take a reference, to avoid infinite recursion
+    // Skins will be properly loaded later
     Value *curSkin = FindUInt(obj, "skin");
     if (nullptr != curSkin) {
         this->skin = r.skins.Get(curSkin->GetUint());
@@ -1584,7 +1613,6 @@ inline void Asset::Load(const std::string &pFile, bool isBinary) {
         }
     }
 
-    // Read skins after nodes have been loaded to avoid infinite recursion
     if (Value *skinsArray = FindArray(doc, "skins")) {
         for (unsigned int i = 0; i < skinsArray->Size(); ++i) {
             skins.Retrieve(i);

code/AssetLib/glTF2/glTF2AssetWriter.h

@@ -50,7 +50,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef GLTF2ASSETWRITER_H_INC
 #define GLTF2ASSETWRITER_H_INC
 
-#ifndef ASSIMP_BUILD_NO_GLTF_IMPORTER
+#if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF2_IMPORTER)
 
 #include "glTF2Asset.h"
 

code/AssetLib/glTF2/glTF2AssetWriter.inl

@@ -1,4 +1,4 @@
-/*
+/*
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
@@ -107,13 +107,9 @@ namespace glTF2 {
 
     inline void Write(Value& obj, Accessor& a, AssetWriter& w)
     {
+        if (a.bufferView) {
             obj.AddMember("bufferView", a.bufferView->index, w.mAl);
             obj.AddMember("byteOffset", (unsigned int)a.byteOffset, w.mAl);
-
-        obj.AddMember("componentType", int(a.componentType), w.mAl);
-        obj.AddMember("count", (unsigned int)a.count, w.mAl);
-        obj.AddMember("type", StringRef(AttribType::ToString(a.type)), w.mAl);
-
             Value vTmpMax, vTmpMin;
             if (a.componentType == ComponentType_FLOAT) {
                 obj.AddMember("max", MakeValue(vTmpMax, a.max, w.mAl), w.mAl);
@@ -124,6 +120,36 @@ namespace glTF2 {
             }
         }
 
+        obj.AddMember("componentType", int(a.componentType), w.mAl);
+        obj.AddMember("count", (unsigned int)a.count, w.mAl);
+        obj.AddMember("type", StringRef(AttribType::ToString(a.type)), w.mAl);
+
+        if (a.sparse) {
+            Value sparseValue;
+            sparseValue.SetObject();
+
+            //count
+            sparseValue.AddMember("count", (unsigned int)a.sparse->count, w.mAl);
+
+            //indices
+            Value indices;
+            indices.SetObject();
+            indices.AddMember("bufferView", a.sparse->indices->index, w.mAl);
+            indices.AddMember("byteOffset", (unsigned int)a.sparse->indicesByteOffset, w.mAl);
+            indices.AddMember("componentType", int(a.sparse->indicesType), w.mAl);
+            sparseValue.AddMember("indices", indices, w.mAl);
+
+            //values
+            Value values;
+            values.SetObject();
+            values.AddMember("bufferView", a.sparse->values->index, w.mAl);
+            values.AddMember("byteOffset", (unsigned int)a.sparse->valuesByteOffset, w.mAl);
+            sparseValue.AddMember("values", values, w.mAl);
+
+            obj.AddMember("sparse", sparseValue, w.mAl);
+        }
+    }
+
     inline void Write(Value& obj, Animation& a, AssetWriter& w)
     {
         /****************** Channels *******************/
@@ -616,6 +642,10 @@ namespace glTF2 {
         if (mAsset.scene) {
             mDoc.AddMember("scene", mAsset.scene->index, mAl);
         }
+        
+        if(mAsset.extras) {
+            mDoc.AddMember("extras", *mAsset.extras, mAl);
+        }
     }
 
     inline void AssetWriter::WriteFile(const char* path)
@@ -709,10 +739,13 @@ namespace glTF2 {
         // Binary chunk
         //
 
+        int GLB_Chunk_count = 1;
         uint32_t binaryChunkLength = 0;
         if (bodyBuffer->byteLength > 0) {
             binaryChunkLength = (bodyBuffer->byteLength + 3) & ~3; // Round up to next multiple of 4
-            //auto curPaddingLength = binaryChunkLength - bodyBuffer->byteLength;
+            
+            auto curPaddingLength = binaryChunkLength - bodyBuffer->byteLength;
+            ++GLB_Chunk_count;
 
             GLB_Chunk binaryChunk;
             binaryChunk.chunkLength = binaryChunkLength;
@@ -727,7 +760,7 @@ namespace glTF2 {
             if (outfile->Write(bodyBuffer->GetPointer(), 1, bodyBuffer->byteLength) != bodyBuffer->byteLength) {
                 throw DeadlyExportError("Failed to write body data!");
             }
-            if (paddingLength && outfile->Write(&padding, 1, paddingLength) != paddingLength) {
+            if (curPaddingLength && outfile->Write(&padding, 1, paddingLength) != paddingLength) {
                 throw DeadlyExportError("Failed to write body data padding!");
             }
         }
@@ -742,7 +775,7 @@ namespace glTF2 {
         header.version = 2;
         AI_SWAP4(header.version);
 
-        header.length = uint32_t(sizeof(GLB_Header) + 2 * sizeof(GLB_Chunk) + jsonChunkLength + binaryChunkLength);
+        header.length = uint32_t(sizeof(GLB_Header) + GLB_Chunk_count * sizeof(GLB_Chunk) + jsonChunkLength + binaryChunkLength);
         AI_SWAP4(header.length);
 
         outfile->Seek(0, aiOrigin_SET);

code/AssetLib/glTF2/glTF2Exporter.cpp

@@ -1,4 +1,4 @@
-/*
+/*
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
@@ -116,6 +116,13 @@ glTF2Exporter::glTF2Exporter(const char* filename, IOSystem* pIOSystem, const ai
 
     ExportAnimations();
     
+    // export extras
+    if(mProperties->HasPropertyCallback("extras"))
+    {
+        std::function<void*(void*)> ExportExtras = mProperties->GetPropertyCallback("extras");
+        mAsset->extras = (rapidjson::Value*)ExportExtras(0);
+    }
+    
     AssetWriter writer(*mAsset);
 
     if (isBinary) {
@@ -214,6 +221,158 @@ inline void SetAccessorRange(ComponentType compType, Ref<Accessor> acc, void* da
 	}
 }
 
+// compute the (data-dataBase), store the non-zero data items
+template <typename T>
+size_t NZDiff(void *data, void *dataBase, size_t count, unsigned int numCompsIn, unsigned int numCompsOut, void *&outputNZDiff, void *&outputNZIdx) {
+    std::vector<T> vNZDiff;
+    std::vector<unsigned short> vNZIdx;
+    size_t totalComps = count * numCompsIn;
+    T *bufferData_ptr = static_cast<T *>(data);
+    T *bufferData_end = bufferData_ptr + totalComps;
+    T *bufferBase_ptr = static_cast<T *>(dataBase);
+
+    // Search and set extreme values.
+    for (short idx = 0; bufferData_ptr < bufferData_end; idx += 1, bufferData_ptr += numCompsIn) {
+        bool bNonZero = false;
+
+        //for the data, check any component Non Zero
+        for (unsigned int j = 0; j < numCompsOut; j++) {
+            double valueData = bufferData_ptr[j];
+            double valueBase = bufferBase_ptr ? bufferBase_ptr[j] : 0;
+            if ((valueData - valueBase) != 0) {
+                bNonZero = true;
+                break;
+            }
+        }
+
+        //all zeros, continue
+        if (!bNonZero)
+            continue;
+
+        //non zero, store the data
+        for (unsigned int j = 0; j < numCompsOut; j++) {
+            T valueData = bufferData_ptr[j];
+            T valueBase = bufferBase_ptr ? bufferBase_ptr[j] : 0;
+            vNZDiff.push_back(valueData - valueBase);
+        }
+        vNZIdx.push_back(idx);
+    }
+
+    //avoid all-0, put 1 item
+    if (vNZDiff.size() == 0) {
+        for (unsigned int j = 0; j < numCompsOut; j++)
+            vNZDiff.push_back(0);
+        vNZIdx.push_back(0);
+    }
+
+    //process data
+    outputNZDiff = new T[vNZDiff.size()];
+    memcpy(outputNZDiff, vNZDiff.data(), vNZDiff.size() * sizeof(T));
+
+    outputNZIdx = new unsigned short[vNZIdx.size()];
+    memcpy(outputNZIdx, vNZIdx.data(), vNZIdx.size() * sizeof(unsigned short));
+    return vNZIdx.size();
+}
+
+inline size_t NZDiff(ComponentType compType, void *data, void *dataBase, size_t count, unsigned int numCompsIn, unsigned int numCompsOut, void *&nzDiff, void *&nzIdx) {
+    switch (compType) {
+    case ComponentType_SHORT:
+        return NZDiff<short>(data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
+    case ComponentType_UNSIGNED_SHORT:
+        return NZDiff<unsigned short>(data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
+    case ComponentType_UNSIGNED_INT:
+        return NZDiff<unsigned int>(data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
+    case ComponentType_FLOAT:
+        return NZDiff<float>(data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
+    case ComponentType_BYTE:
+        return NZDiff<int8_t>(data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
+    case ComponentType_UNSIGNED_BYTE:
+        return NZDiff<uint8_t>(data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
+    }
+    return 0;
+}
+
+inline Ref<Accessor> ExportDataSparse(Asset &a, std::string &meshName, Ref<Buffer> &buffer,
+        size_t count, void *data, AttribType::Value typeIn, AttribType::Value typeOut, ComponentType compType, BufferViewTarget target = BufferViewTarget_NONE, void *dataBase = 0) {
+    if (!count || !data) {
+        return Ref<Accessor>();
+    }
+
+    unsigned int numCompsIn = AttribType::GetNumComponents(typeIn);
+    unsigned int numCompsOut = AttribType::GetNumComponents(typeOut);
+    unsigned int bytesPerComp = ComponentTypeSize(compType);
+
+    // accessor
+    Ref<Accessor> acc = a.accessors.Create(a.FindUniqueID(meshName, "accessor"));
+
+    // if there is a basic data vector
+    if (dataBase) {
+        size_t base_offset = buffer->byteLength;
+        size_t base_padding = base_offset % bytesPerComp;
+        base_offset += base_padding;
+        size_t base_length = count * numCompsOut * bytesPerComp;
+        buffer->Grow(base_length + base_padding);
+
+        Ref<BufferView> bv = a.bufferViews.Create(a.FindUniqueID(meshName, "view"));
+        bv->buffer = buffer;
+        bv->byteOffset = base_offset;
+        bv->byteLength = base_length; //! The target that the WebGL buffer should be bound to.
+        bv->byteStride = 0;
+        bv->target = target;
+        acc->bufferView = bv;
+        acc->WriteData(count, dataBase, numCompsIn * bytesPerComp);
+    }
+    acc->byteOffset = 0;
+    acc->componentType = compType;
+    acc->count = count;
+    acc->type = typeOut;
+
+    if (data) {
+        void *nzDiff = 0, *nzIdx = 0;
+        size_t nzCount = NZDiff(compType, data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
+        acc->sparse.reset(new Accessor::Sparse);
+        acc->sparse->count = nzCount;
+
+        //indices
+        unsigned int bytesPerIdx = sizeof(unsigned short);
+        size_t indices_offset = buffer->byteLength;
+        size_t indices_padding = indices_offset % bytesPerIdx;
+        indices_offset += indices_padding;
+        size_t indices_length = nzCount * 1 * bytesPerIdx;
+        buffer->Grow(indices_length + indices_padding);
+
+        Ref<BufferView> indicesBV = a.bufferViews.Create(a.FindUniqueID(meshName, "view"));
+        indicesBV->buffer = buffer;
+        indicesBV->byteOffset = indices_offset;
+        indicesBV->byteLength = indices_length;
+        indicesBV->byteStride = 0;
+        acc->sparse->indices = indicesBV;
+        acc->sparse->indicesType = ComponentType_UNSIGNED_SHORT;
+        acc->sparse->indicesByteOffset = 0;
+        acc->WriteSparseIndices(nzCount, nzIdx, 1 * bytesPerIdx);
+
+        //values
+        size_t values_offset = buffer->byteLength;
+        size_t values_padding = values_offset % bytesPerComp;
+        values_offset += values_padding;
+        size_t values_length = nzCount * numCompsOut * bytesPerComp;
+        buffer->Grow(values_length + values_padding);
+
+        Ref<BufferView> valuesBV = a.bufferViews.Create(a.FindUniqueID(meshName, "view"));
+        valuesBV->buffer = buffer;
+        valuesBV->byteOffset = values_offset;
+        valuesBV->byteLength = values_length;
+        valuesBV->byteStride = 0;
+        acc->sparse->values = valuesBV;
+        acc->sparse->valuesByteOffset = 0;
+        acc->WriteSparseValues(nzCount, nzDiff, numCompsIn * bytesPerComp);
+
+        //clear
+        delete[] (char*)nzDiff;
+        delete[] (char*)nzIdx;
+    }
+    return acc;
+}
 inline Ref<Accessor> ExportData(Asset& a, std::string& meshName, Ref<Buffer>& buffer,
     size_t count, void* data, AttribType::Value typeIn, AttribType::Value typeOut, ComponentType compType, BufferViewTarget target = BufferViewTarget_NONE)
 {
@@ -824,6 +983,10 @@ void glTF2Exporter::ExportMeshes()
 
         /*************** Targets for blendshapes ****************/
         if (aim->mNumAnimMeshes > 0) {
+            bool bUseSparse = this->mProperties->HasPropertyBool("GLTF2_SPARSE_ACCESSOR_EXP") &&
+                              this->mProperties->GetPropertyBool("GLTF2_SPARSE_ACCESSOR_EXP");
+            bool bIncludeNormal = this->mProperties->HasPropertyBool("GLTF2_TARGET_NORMAL_EXP") &&
+                                  this->mProperties->GetPropertyBool("GLTF2_TARGET_NORMAL_EXP");
             bool bExportTargetNames = this->mProperties->HasPropertyBool("GLTF2_TARGETNAMES_EXP") &&
                               this->mProperties->GetPropertyBool("GLTF2_TARGETNAMES_EXP");
 
@@ -832,7 +995,6 @@ void glTF2Exporter::ExportMeshes()
                 aiAnimMesh *pAnimMesh = aim->mAnimMeshes[am];
                 if (bExportTargetNames)
                     m->targetNames.push_back(pAnimMesh->mName.data);
-
                 // position
                 if (pAnimMesh->HasPositions()) {
                     // NOTE: in gltf it is the diff stored
@@ -840,9 +1002,16 @@ void glTF2Exporter::ExportMeshes()
                     for (unsigned int vt = 0; vt < pAnimMesh->mNumVertices; ++vt) {
                         pPositionDiff[vt] = pAnimMesh->mVertices[vt] - aim->mVertices[vt];
                     }
-                    Ref<Accessor> vec = ExportData(*mAsset, meshId, b,
+                    Ref<Accessor> vec;
+                    if (bUseSparse) {
+                        vec = ExportDataSparse(*mAsset, meshId, b,
                                 pAnimMesh->mNumVertices, pPositionDiff,
                                 AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT);
+                    } else {
+                        vec = ExportData(*mAsset, meshId, b,
+                                pAnimMesh->mNumVertices, pPositionDiff,
+                                AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT);
+                    }
                     if (vec) {
                         p.targets[am].position.push_back(vec);
                     }
@@ -850,14 +1019,21 @@ void glTF2Exporter::ExportMeshes()
                 }
 
                 // normal
-                if (pAnimMesh->HasNormals()) {
+                if (pAnimMesh->HasNormals() && bIncludeNormal) {
                     aiVector3D *pNormalDiff = new aiVector3D[pAnimMesh->mNumVertices];
                     for (unsigned int vt = 0; vt < pAnimMesh->mNumVertices; ++vt) {
                         pNormalDiff[vt] = pAnimMesh->mNormals[vt] - aim->mNormals[vt];
                     }
-                    Ref<Accessor> vec = ExportData(*mAsset, meshId, b,
+                    Ref<Accessor> vec;
+                    if (bUseSparse) {
+                        vec = ExportDataSparse(*mAsset, meshId, b,
                                 pAnimMesh->mNumVertices, pNormalDiff,
                                 AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT);
+                    } else {
+                        vec = ExportData(*mAsset, meshId, b,
+                                pAnimMesh->mNumVertices, pNormalDiff,
+                                AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT);
+                    }
                     if (vec) {
                         p.targets[am].normal.push_back(vec);
                     }

code/AssetLib/glTF2/glTF2Exporter.h

@@ -46,7 +46,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef AI_GLTF2EXPORTER_H_INC
 #define AI_GLTF2EXPORTER_H_INC
 
-#ifndef ASSIMP_BUILD_NO_GLTF_IMPORTER
+#if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF2_IMPORTER)
 
 #include <assimp/types.h>
 #include <assimp/material.h>

code/AssetLib/glTF2/glTF2Importer.cpp

@@ -39,7 +39,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ----------------------------------------------------------------------
 */
 
-#ifndef ASSIMP_BUILD_NO_GLTF_IMPORTER
+#if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF2_IMPORTER)
 
 #include "AssetLib/glTF2/glTF2Importer.h"
 #include "PostProcessing/MakeVerboseFormat.h"

code/Common/Exporter.cpp

@@ -74,7 +74,7 @@ Here we implement only the C++ interface (Assimp::Exporter).
 
 namespace Assimp {
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #    pragma warning( disable : 4800 )
 #endif // _WIN32
 
@@ -179,11 +179,14 @@ static void setupExporterArray(std::vector<Exporter::ExportFormatEntry> &exporte
 			aiProcess_Triangulate | aiProcess_SortByPType | aiProcess_JoinIdenticalVertices));
 #endif
 
-#ifndef ASSIMP_BUILD_NO_GLTF_EXPORTER
+#if !defined(ASSIMP_BUILD_NO_GLTF_EXPORTER) && !defined(ASSIMP_BUILD_NO_GLTF2_EXPORTER)
 	exporters.push_back(Exporter::ExportFormatEntry("gltf2", "GL Transmission Format v. 2", "gltf", &ExportSceneGLTF2,
 			aiProcess_JoinIdenticalVertices | aiProcess_Triangulate | aiProcess_SortByPType));
 	exporters.push_back(Exporter::ExportFormatEntry("glb2", "GL Transmission Format v. 2 (binary)", "glb", &ExportSceneGLB2,
 			aiProcess_JoinIdenticalVertices | aiProcess_Triangulate | aiProcess_SortByPType));
+#endif
+
+#if !defined(ASSIMP_BUILD_NO_GLTF_EXPORTER) && !defined(ASSIMP_BUILD_NO_GLTF1_EXPORTER)
 	exporters.push_back(Exporter::ExportFormatEntry("gltf", "GL Transmission Format", "gltf", &ExportSceneGLTF,
 			aiProcess_JoinIdenticalVertices | aiProcess_Triangulate | aiProcess_SortByPType));
 	exporters.push_back(Exporter::ExportFormatEntry("glb", "GL Transmission Format (binary)", "glb", &ExportSceneGLB,
@@ -580,10 +583,23 @@ ExportProperties::ExportProperties(const ExportProperties &other)
 : mIntProperties(other.mIntProperties)
 , mFloatProperties(other.mFloatProperties)
 , mStringProperties(other.mStringProperties)
-, mMatrixProperties(other.mMatrixProperties) {
+, mMatrixProperties(other.mMatrixProperties)
+, mCallbackProperties(other.mCallbackProperties){
     // empty
 }
 
+bool ExportProperties::SetPropertyCallback(const char *szName, const std::function<void *(void *)> &f) {
+    return SetGenericProperty<std::function<void *(void *)>>(mCallbackProperties, szName, f);
+}
+
+std::function<void *(void *)> ExportProperties::GetPropertyCallback(const char *szName) const {
+    return GetGenericProperty<std::function<void *(void *)>>(mCallbackProperties, szName, 0);
+}
+
+bool ExportProperties::HasPropertyCallback(const char *szName) const {
+    return HasGenericProperty<std::function<void *(void *)>>(mCallbackProperties, szName);
+}
+
 // ------------------------------------------------------------------------------------------------
 // Set a configuration property
 bool ExportProperties::SetPropertyInteger(const char* szName, int iValue) {

code/Common/Importer.cpp

@@ -1174,7 +1174,7 @@ void Importer::GetMemoryRequirements(aiMemoryInfo& in) const {
 
         // add all bone anims
         for (unsigned int a = 0; a < pc->mNumChannels; ++a) {
-            const aiNodeAnim* pc2 = pc->mChannels[i];
+            const aiNodeAnim* pc2 = pc->mChannels[a];
             in.animations += sizeof(aiNodeAnim);
             in.animations += pc2->mNumPositionKeys * sizeof(aiVectorKey);
             in.animations += pc2->mNumScalingKeys * sizeof(aiVectorKey);

code/Common/ImporterRegistry.cpp

@@ -1,4 +1,4 @@
-/*
+/*
 ---------------------------------------------------------------------------
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
@@ -179,8 +179,10 @@ corresponding preprocessor flag to selectively disable formats.
 #ifndef ASSIMP_BUILD_NO_ASSBIN_IMPORTER
 #include "AssetLib/Assbin/AssbinLoader.h"
 #endif
-#ifndef ASSIMP_BUILD_NO_GLTF_IMPORTER
+#if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF1_IMPORTER)
 #include "AssetLib/glTF/glTFImporter.h"
+#endif
+#if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF2_IMPORTER)
 #include "AssetLib/glTF2/glTF2Importer.h"
 #endif
 #ifndef ASSIMP_BUILD_NO_C4D_IMPORTER
@@ -339,8 +341,10 @@ void GetImporterInstanceList(std::vector<BaseImporter *> &out) {
 #if (!defined ASSIMP_BUILD_NO_ASSBIN_IMPORTER)
     out.push_back(new AssbinImporter());
 #endif
-#if (!defined ASSIMP_BUILD_NO_GLTF_IMPORTER)
+#if (!defined ASSIMP_BUILD_NO_GLTF_IMPORTER && !defined ASSIMP_BUILD_NO_GLTF1_IMPORTER)
     out.push_back(new glTFImporter());
+#endif
+#if (!defined ASSIMP_BUILD_NO_GLTF_IMPORTER && !defined ASSIMP_BUILD_NO_GLTF2_IMPORTER)
     out.push_back(new glTF2Importer());
 #endif
 #if (!defined ASSIMP_BUILD_NO_C4D_IMPORTER)

code/Common/Subdivision.cpp

@@ -53,7 +53,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 using namespace Assimp;
 void mydummy() {}
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #pragma warning(disable : 4709)
 #endif // _WIN32
 // ------------------------------------------------------------------------------------------------

include/assimp/Exporter.hpp

@@ -54,6 +54,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "cexport.h"
 #include <map>
+#include <functional>
 
 namespace Assimp {
 
@@ -107,7 +108,8 @@ public:
         }
 
         ExportFormatEntry() :
-                mExportFunction(), mEnforcePP() {
+                mExportFunction(),
+                mEnforcePP() {
             mDescription.id = nullptr;
             mDescription.description = nullptr;
             mDescription.fileExtension = nullptr;
@@ -147,7 +149,7 @@ public:
      * interface is the default IO handler provided by ASSIMP. The default
      * handler is active as long the application doesn't supply its own
      * custom IO handler via #SetIOHandler().
-     * @return A valid IOSystem interface, never nullptr. */
+     * @return A valid IOSystem interface, never NULL. */
     IOSystem *GetIOHandler() const;
 
     // -------------------------------------------------------------------
@@ -286,7 +288,7 @@ public:
      * @param pIndex Index of the export format to retrieve information
      *  for. Valid range is 0 to #Exporter::GetExportFormatCount
      * @return A description of that specific export format.
-     *  nullptr if pIndex is out of range. */
+     *  NULL if pIndex is out of range. */
     const aiExportFormatDesc *GetExportFormatDescription(size_t pIndex) const;
 
     // -------------------------------------------------------------------
@@ -329,6 +331,7 @@ public:
     typedef std::map<KeyType, ai_real> FloatPropertyMap;
     typedef std::map<KeyType, std::string> StringPropertyMap;
     typedef std::map<KeyType, aiMatrix4x4> MatrixPropertyMap;
+    typedef std::map<KeyType, std::function<void *(void *)>> CallbackPropertyMap;
 
 public:
     /** Standard constructor
@@ -388,6 +391,8 @@ public:
      */
     bool SetPropertyMatrix(const char *szName, const aiMatrix4x4 &sValue);
     
+    bool SetPropertyCallback(const char *szName, const std::function<void *(void *)> &f);
+
     // -------------------------------------------------------------------
     /** Get a configuration property.
      * @param szName Name of the property. All supported properties
@@ -440,6 +445,8 @@ public:
     const aiMatrix4x4 GetPropertyMatrix(const char *szName,
             const aiMatrix4x4 &sErrorReturn = aiMatrix4x4()) const;
 
+    std::function<void *(void *)> GetPropertyCallback(const char* szName) const;
+
     // -------------------------------------------------------------------
     /** Determine a integer configuration property has been set.
     * @see HasPropertyInteger()
@@ -466,7 +473,8 @@ public:
      */
     bool HasPropertyMatrix(const char *szName) const;
 
-protected:
+    bool HasPropertyCallback(const char *szName) const;
+
     /** List of integer properties */
     IntPropertyMap mIntProperties;
 
@@ -478,6 +486,8 @@ protected:
 
     /** List of Matrix properties */
     MatrixPropertyMap mMatrixProperties;
+
+    CallbackPropertyMap mCallbackProperties;
 };
 
 // ----------------------------------------------------------------------------------

samples/SimpleOpenGL/Sample_SimpleOpenGL.c

@@ -278,7 +278,7 @@ void do_motion (void)
 	static int frames = 0;
 
 	int time = glutGet(GLUT_ELAPSED_TIME);
-	angle += static_cast<float>((time-prev_time)*0.01);
+	angle += (float)((time-prev_time)*0.01);
 	prev_time = time;
 
 	frames += 1;
@@ -376,7 +376,7 @@ int main(int argc, char **argv)
 
 	// Check and validate the specified model file extension.
 	model_file = argv[1];
-	const char* extension = strchr(model_file, '.');
+	const char* extension = strrchr(model_file, '.');
 	if (!extension) {
 		print_error("Please provide a file with a valid extension.");
 		return EXIT_FAILURE;

test/unit/utACImportExport.cpp

@@ -101,6 +101,12 @@ TEST(utACImportExport, importWuson) {
     ASSERT_NE(nullptr, scene);
 }
 
+TEST(utACImportExport, importWusonACC) {
+    Assimp::Importer importer;
+    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/AC/Wuson.acc", aiProcess_ValidateDataStructure);
+    ASSERT_NE(nullptr, scene);
+}
+
 TEST(utACImportExport, testFormatDetection) {
     Assimp::Importer importer;
     const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/AC/TestFormatDetection", aiProcess_ValidateDataStructure);