Description

Right now it isn't possible to pass a CompositeSurface object directly to a SurfaceFilter. While a CompositeSurface object has all of the operator methods to generate halfspaces, it (correctly) doesn't provide an ID method and can't be applied in the SurfaceFilter constructor.

Assuming that the desired behavior is to add all of the composing surfaces to the filter, we can enable this by either:

a. adding some special behavior for CompositeSurface types

b. adding a CompositeSurfaces.get_surfaces() method that returns a list of the objects surface objects to make it simpler to create the desired filter, leaving SurfaceFilter as-is.

class CompositeSurface:

    def composing_surfaces(self):
        return [getattr(self, name) for name in self._surface_names]

Alternatives

No others come to mind at this time.

Compatibility

This is an addition in capability and API, so compatibility shouldn't be an issue.