ObjectPtr FromHoudiniPolygonsConverter::doDetailConversion( const GU_Detail *geo, const CompoundObject *operands ) const
{
const GA_PrimitiveList &primitives = geo->getPrimitiveList();
MeshPrimitivePtr result = new MeshPrimitive();
size_t numEdges = 0;
std::vector<int> vertIds;
std::vector<int> vertsPerFace;
GA_Offset start, end;
for( GA_Iterator it( geo->getPrimitiveRange() ); it.blockAdvance( start, end ); )
{
for( GA_Offset offset = start; offset < end; ++offset )
{
const GA_Primitive *prim = primitives.get( offset );
if( prim->getTypeId() != GEO_PRIMPOLY )
{
throw std::runtime_error( "FromHoudiniPolygonsConverter: Geometry contains non-polygon primitives" );
}
size_t numPrimVerts = prim->getVertexCount();
vertsPerFace.push_back( numPrimVerts );
numEdges += numPrimVerts;
std::vector<int> ids( numPrimVerts );
for( size_t j = 0; j < numPrimVerts; j++ )
{
vertIds.push_back( geo->pointIndex( prim->getPointOffset( numPrimVerts - 1 - j ) ) );
}
}
}
result->setTopology( new IntVectorData( vertsPerFace ), new IntVectorData( vertIds ) );
CompoundObjectPtr modifiedOperands = transferMeshInterpolation( geo, operands, result.get() );
if( geo->getNumVertices() )
{
transferAttribs( geo, result.get(), modifiedOperands ? modifiedOperands.get() : operands );
}
// check for corners and creases, which would have been extracted via transferAttribs()
// as they are no different to standard attribs in Houdini.
convertCorners( result.get() );
convertCreases( result.get(), vertIds, numEdges );
return result;
}
void IECoreArnold::RendererImplementation::mesh( IECore::ConstIntVectorDataPtr vertsPerFace, IECore::ConstIntVectorDataPtr vertIds, const std::string &interpolation, const IECore::PrimitiveVariableMap &primVars )
{
MeshPrimitivePtr mesh = new IECore::MeshPrimitive( vertsPerFace, vertIds, interpolation );
mesh->variables = primVars;
addPrimitive( mesh.get(), "ai:polymesh:" );
}