Pixel-planes 5: a heterogeneous multiprocessor graphics system using processor-enhanced memories
SIGGRAPH '89 Proceedings of the 16th annual conference on Computer graphics and interactive techniques
A multi-processor workstation with a logic-enhanced distributed frame buffer
EGGH'87 Proceedings of the Second Eurographics conference on Advances in Computer Graphics Hardware
Correct shading of regularized CSG solids using a depth-interval buffer
EGGH'90 Proceedings of the Fifth Eurographics conference on Advances in Computer Graphics Hardware: rendering, ray tracing and visualization systems
Accurate scanconversion of triangulated surfaces
EGGH'91 Proceedings of the Sixth Eurographics conference on Advances in Computer Graphics Hardware: rendering, visualization and rasterization hardware
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Solid modelers based on constructive solid geometry (CSG) typically generate shaded displays directly from CSG by using ray-casting techniques, which do not require informatin on the faces, edges, and vertices that bound a solid. This article describes an alternative-a simple new algorithm based on a depth-buffering or z-buffering approach. The z-buffer display algorithm operates directly on CSG, does not require explicit boundary data, and is easier to implement than ray casting. Ray-casting and z-beffering algorithms have comparable performances, but z-buffering is often faster for objects with complex surfaces, because it avoids expensive curve/surface intersection calculations. Because of their simplicity, depth-buffering algorithms for CSG are well-suited to hardware implementations, and may lead to machines simpler than those now being built for ray casting.