Allow users to override material parser

[einarf]

We should allow users to override the material parser. They can simply make a subclass of the obj parser.

class CustomObjParser(ObjParser): material_parser_cls = CustomMaterialParser class CustomWavefront(Wafefront): parser_cls = CustomObjParser scene = CustomWavefront(...)

This is a lot less hassle than overriding methods possibly breaking forward compatibility.

[greenmoss]

Is this related to #53?

Seems like a test case would be useful here.

I like the sub-classing approach. Pretty clean.

[einarf]

Not sure how to actually test this as it's the users responsibility to write a working parser. If you have any specific idea, don't hesitate to share it.

Seems I need to rebase this before merge anyway.

[einarf]

All done. Still not sure what test would cover this other than all existing parser tests.

[einarf]

This is not related to #53. It's just to allow people to override the material parser.