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fix export gltf2, The JOINTS_0 componentType is incorrect

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wuxiaoqian
2018-04-26 10:56:56 +08:00
parent 80799bdbf9
commit 6b4caa0f12
3 changed files with 44 additions and 0 deletions
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20
code/glTF2Exporter.cpp
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@@ -623,6 +623,26 @@ void ExportSkin(Asset& mAsset, const aiMesh* aimesh, Ref<Mesh>& meshRef, Ref<Buf
Mesh::Primitive& p = meshRef->primitives.back();
Ref<Accessor> vertexJointAccessor = ExportData(mAsset, skinRef->id, bufferRef, aimesh->mNumVertices, vertexJointData, AttribType::VEC4, AttribType::VEC4, ComponentType_FLOAT);
if ( vertexJointAccessor ) {
unsigned int offset = vertexJointAccessor->bufferView->byteOffset;
unsigned int bytesLen = vertexJointAccessor->bufferView->byteLength;
unsigned int s_bytesPerComp= ComponentTypeSize(ComponentType_UNSIGNED_SHORT);
unsigned int bytesPerComp = ComponentTypeSize(vertexJointAccessor->componentType);
unsigned int s_bytesLen = bytesLen * s_bytesPerComp / bytesPerComp;
Ref<Buffer> buf = vertexJointAccessor->bufferView->buffer;
uint8_t* arrys = new uint8_t[s_bytesLen];
unsigned int i = 0;
for ( unsigned int j = 0; j <= bytesLen; j += bytesPerComp ){
size_t len_p = offset + j;
float f_value = *(float *)&buf->GetPointer()[len_p];
unsigned short c = static_cast<unsigned short>(f_value);
uint8_t* data = new uint8_t[s_bytesPerComp];
data = (uint8_t*)&c;
memcpy(&arrys[i*s_bytesPerComp], data, s_bytesPerComp);
++i;
}
buf->ReplaceData_joint(offset, bytesLen, arrys, s_bytesLen);
vertexJointAccessor->componentType = ComponentType_UNSIGNED_SHORT;
p.attributes.joint.push_back( vertexJointAccessor );
}