pub fn read_iges_assembly(text: &str) -> Result<Option<StepAssembly>, String>Expand description
The file’s subfigure structure, the IGES counterpart of
crate::read_step_assembly: one product for the file itself holding the
solids that stand on their own, one per instanced subfigure (308) holding
its own solids in its own frame, and one occurrence per instance (408) with
its placement in millimetres. Ok(None) when the file places no
subfigures, so the caller takes the flat import as for STEP.
Every solid is built once, as in the flat import, and a file the flat import refuses is refused here with the same words: an assembly never comes in short.