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Some FBX multi-material mesh fixes #2546

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Jul 14, 2019
Merged

Some FBX multi-material mesh fixes #2546

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18 changes: 15 additions & 3 deletions code/FBX/FBXConverter.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1247,10 +1247,10 @@ namespace Assimp {
ai_assert(count_faces);
ai_assert(count_vertices);

// mapping from output indices to DOM indexing, needed to resolve weights
// mapping from output indices to DOM indexing, needed to resolve weights or blendshapes
std::vector<unsigned int> reverseMapping;
std::map<unsigned int, unsigned int> translateIndexMap;
if (process_weights) {
if (process_weights || mesh.GetBlendShapes().size() > 0) {
reverseMapping.resize(count_vertices);
}

Expand Down Expand Up @@ -1407,7 +1407,10 @@ namespace Assimp {
unsigned int count = 0;
const unsigned int* outIndices = mesh.ToOutputVertexIndex(index, count);
for (unsigned int k = 0; k < count; k++) {
unsigned int index = translateIndexMap[outIndices[k]];
unsigned int outIndex = outIndices[k];
if (translateIndexMap.find(outIndex) == translateIndexMap.end())
continue;
unsigned int index = translateIndexMap[outIndex];
animMesh->mVertices[index] += vertex;
if (animMesh->mNormals != nullptr) {
animMesh->mNormals[index] += normal;
Expand All @@ -1421,6 +1424,15 @@ namespace Assimp {
}
}

const size_t numAnimMeshes = animMeshes.size();
if (numAnimMeshes > 0) {
out_mesh->mNumAnimMeshes = static_cast<unsigned int>(numAnimMeshes);
out_mesh->mAnimMeshes = new aiAnimMesh*[numAnimMeshes];
for (size_t i = 0; i < numAnimMeshes; i++) {
out_mesh->mAnimMeshes[i] = animMeshes.at(i);
}
}

return static_cast<unsigned int>(meshes.size() - 1);
}

Expand Down