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Add support of 32-bit indices for the glTF2 export

pull/2062/head
FRICOTEAUX 2018-07-19 11:29:04 +02:00
parent 7c85929649
commit a69e95bdc1
1 changed files with 4 additions and 21 deletions
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25
code/glTF2Exporter.cpp
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@ -94,19 +94,7 @@ glTF2Exporter::glTF2Exporter(const char* filename, IOSystem* pIOSystem, const ai
, mIOSystem(pIOSystem)
, mProperties(pProperties)
{
aiScene* sceneCopy_tmp;
SceneCombiner::CopyScene(&sceneCopy_tmp, pScene);
std::unique_ptr<aiScene> sceneCopy(sceneCopy_tmp);
SplitLargeMeshesProcess_Triangle tri_splitter;
tri_splitter.SetLimit(0xffff);
tri_splitter.Execute(sceneCopy.get());
SplitLargeMeshesProcess_Vertex vert_splitter;
vert_splitter.SetLimit(0xffff);
vert_splitter.Execute(sceneCopy.get());
mScene = sceneCopy.get();
mScene = pScene;
mAsset.reset( new Asset( pIOSystem ) );
@ -681,12 +669,7 @@ void ExportSkin(Asset& mAsset, const aiMesh* aimesh, Ref<Mesh>& meshRef, Ref<Buf
void glTF2Exporter::ExportMeshes()
{
// Not for
// using IndicesType = decltype(aiFace::mNumIndices);
// But yes for
// using IndicesType = unsigned short;
// because "ComponentType_UNSIGNED_SHORT" used for indices. And it's a maximal type according to glTF specification.
typedef unsigned short IndicesType;
typedef decltype(aiFace::mNumIndices) IndicesType;
std::string fname = std::string(mFilename);
std::string bufferIdPrefix = fname.substr(0, fname.rfind(".gltf"));
@ -778,11 +761,11 @@ void glTF2Exporter::ExportMeshes()
indices.resize(aim->mNumFaces * nIndicesPerFace);
for (size_t i = 0; i < aim->mNumFaces; ++i) {
for (size_t j = 0; j < nIndicesPerFace; ++j) {
indices[i*nIndicesPerFace + j] = uint16_t(aim->mFaces[i].mIndices[j]);
indices[i*nIndicesPerFace + j] = IndicesType(aim->mFaces[i].mIndices[j]);
}
}
p.indices = ExportData(*mAsset, meshId, b, unsigned(indices.size()), &indices[0], AttribType::SCALAR, AttribType::SCALAR, ComponentType_UNSIGNED_SHORT, true);
p.indices = ExportData(*mAsset, meshId, b, unsigned(indices.size()), &indices[0], AttribType::SCALAR, AttribType::SCALAR, ComponentType_UNSIGNED_INT, true);
}
switch (aim->mPrimitiveTypes) {