[Bf-committers] Displacement mapping....

[Robert Wenzlaff]

http://www.soylent-green.com/DisplaceTest2.jpg
http://www.soylent-green.com/DispTest2.jpg

Done when a mesh is converted to a renderface.  It works on the renderface so 
it's easy to make work for other types.

I'm going to be working on an auto subdivide algorithm next, so displacement 
will work  even for low poly models.  

Autosmooth needs to be on or all shading variation is lost.  I probably need 
to recalculate the normals a little more carefully.   This introduces some 
artifacts (checkered pattern in spec highlight).

And I'm sure I have a ton of other things to take into account (UV mapping, 
etc...)  but it's a start.

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Robert Wenzlaff                  rwenzlaff@soylent-green.com