[Algorithms] BSP-Primitive intersection testing

[Bernd K. <bk...@lo...>]

Charles Bloom writes:
 > Using "cap planes" the error can be controlled, and you can
 > make sure that the error is conservative (returns more
 > intersections) so perhaps that's the best solution - be approximate.

I can also see benefit in decoupling rendering geometry 
detail from collision geometry. Esp. with hardware T&L 
you don't want the CPU to have to push the same scene
geometry. Then there's POV-dependend dynamic LOD in 
multi-POV/player. If hardware support for tesselation 
should hit us, it'll be even worse.

                                         b.