FbxVector4 FBXScene::GetTangent(FbxMesh* pFBXMesh, int nLayerIndex, int nPolygonIndex, int nPolygonVertexIndex, int nVertexIndex)
{
FbxVector4 vTangent(0,0,0,0);
int nLayerCount = pFBXMesh->GetLayerCount();
if( nLayerIndex < nLayerCount )//for( int i = 0; i < nLayerCount; ++i )
{
FbxLayer* pFBXLayer = pFBXMesh->GetLayer(nLayerIndex);
if( pFBXLayer )
{
FbxLayerElementTangent* pTangents = pFBXLayer->GetTangents();
if( pTangents )
{
const FbxLayerElementArrayTemplate<FbxVector4>& pTangentArray = pTangents->GetDirectArray();
if( nVertexIndex < pTangentArray.GetCount() )
{
vTangent = pTangentArray.GetAt(nVertexIndex);
vTangent.Normalize();
}
}
}
}
return vTangent;
}
