precad_set_param(pcs, "merge_edges", _precadMergeEdges ? "1" : "0");
precad_set_param(pcs, "process_3d_topology", _precadProcess3DTopology ? "1" : "0");
precad_set_param(pcs, "discard_input_topology", _precadDiscardInput ? "1" : "0");
precad_set_param(pcs, "merge_edges", _precadMergeEdges ? "1" : "0");
precad_set_param(pcs, "process_3d_topology", _precadProcess3DTopology ? "1" : "0");
precad_set_param(pcs, "discard_input_topology", _precadDiscardInput ? "1" : "0");