fig2rib

Given a figure mesh, export it to a RenderMan RIB file.

This function takes a figure and exports it to a RenderMan RIB file for use with any RenderMan compliant renderer.
For example, executing the demo 'logo.m' (from the Gallery), you can then export it to rib by entering:
>> fig2rib(gcf,'logo.m')

I rendered the screenshot with PIXIE (http://www.renderpixie.com/).

Fixed in this version:
- changing the camera angle in the figure and then exporting *should* work, but it doesn't.

Caveats:
- this is an alpha proof of concept.
- this only works with meshes right now. parametric surfaces aren't supported yet.
- roughness is defined by an adhoc inversion of specularexponent... this may not be a good approximation in all cases.
- output has only been tested with PIXIE so far, but should work for other renderers.