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3d cube culling

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I'm working on a simple maze, and, in order to make the culling efficient, I want to precompute all the polygons visible from within a cube. Does anyone know a fairly fast way of determining which polygons are visible within a cube? Right now, I'm just picking random points within the cube and casting random rays, which is somewhat slow. Any ideas how to speed it up? Mike C. http://www.coolgroups.com/zoomer/

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