This is the ViewProviderFemConstraint class loadSymbol(filename) -> None Load constraint symbol from Open Inventor file. The file structure should be as follows: A separator containing a separator with the symbol used in multiple copies at points on the surface and an optional separator with a symbol excluded from multiple copies. filename : str Open Inventor file. A pivy SoSeparator with the nodes of the constraint symbols A pivy SoSeparator with the nodes of the constraint extra symbols Apply rotation on copies of the constraint symbol