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Ply export now uses uchar as type for the number of vertices per polygon and int as vertex index type.

pull/633/head
Andreas Henne 2015-08-06 13:30:49 +02:00
parent 3fc56de33c
commit fb9e4d1266
1 changed files with 18 additions and 5 deletions
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23
code/PlyExporter.cpp
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@ -189,7 +189,12 @@ PlyExporter::PlyExporter(const char* _filename, const aiScene* pScene, bool bina
}
mOutput << "element face " << faces << endl;
mOutput << "property list uint uint vertex_index" << endl;
// uchar seems to be the most common type for the number of indices per polygon and int seems to be most common for the vertex indices.
// For instance, MeshLab fails to load meshes in which both types are uint. Houdini seems to have problems as well.
// Obviously, using unchar will not work for meshes with polygons with more than 255 indices, but how realistic is this case?
mOutput << "property list uchar int vertex_index" << endl;
mOutput << "end_header" << endl;
for (unsigned int i = 0; i < pScene->mNumMeshes; ++i) {
@ -342,16 +347,24 @@ void PlyExporter::WriteMeshIndices(const aiMesh* m, unsigned int offset)
}
}
void PlyExporter::WriteMeshIndicesBinary(const aiMesh* m, unsigned int offset)
// Generic method in case we want to use different data types for the indices or make this configurable.
template<typename NumIndicesType, typename IndexType>
void WriteMeshIndicesBinary_Generic(const aiMesh* m, unsigned int offset, std::ostringstream& output)
{
for (unsigned int i = 0; i < m->mNumFaces; ++i) {
const aiFace& f = m->mFaces[i];
mOutput.write(reinterpret_cast<const char*>(&f.mNumIndices), 4);
NumIndicesType numIndices = static_cast<NumIndicesType>(f.mNumIndices);
output.write(reinterpret_cast<const char*>(&numIndices), sizeof(NumIndicesType));
for (unsigned int c = 0; c < f.mNumIndices; ++c) {
unsigned int index = f.mIndices[c] + offset;
mOutput.write(reinterpret_cast<const char*>(&index), 4);
IndexType index = f.mIndices[c] + offset;
output.write(reinterpret_cast<const char*>(&index), sizeof(IndexType));
}
}
}
void PlyExporter::WriteMeshIndicesBinary(const aiMesh* m, unsigned int offset)
{
WriteMeshIndicesBinary_Generic<unsigned char, int>(m, offset, mOutput);
}
#endif