Moi User interface

 From:  Michael Gibson
254.4 In reply to 254.3 
> What about the graphic for display the model?

That uses another custom engine that outputs to Direct3D.

Some of the interesting parts of that are a surface tessellator that turns trimmed NURBS surfaces into dense display meshes very quickly, and a mechanism for drawing anti-aliased curves (and hidden-line style curves) even on older video hardware.

- Michael