Computer graphics processing and selective visual display system – Computer graphics processing – Graph generating
Patent
1997-05-30
2000-10-24
Zimmerman, Mark K.
Computer graphics processing and selective visual display system
Computer graphics processing
Graph generating
345420, 345421, 345427, 345435, G06T 1530
Patent
active
061374970
ABSTRACT:
A system and method for performing view clipping and model clipping of graphics primitives in a geometry accelerator of a computer graphics system. The method includes performing view clipping and model clipping of the graphics primitives in homogeneous window coordinates. The geometry accelerator includes a transform machine, a light machine, a clipping machine, and a plane equation machine. The transform machine receives vertex data defining a graphics primitive, in object coordinates, and transforms the vertex data into homogeneous window coordinates. The light machine receives the transformed vertex data from the transform machine and enhances the transformed vertex data by simulating lighting conditions of the graphics primitive. The light machine provides light enhanced transformed vertex data to the clipping machine. The clipping machine receives the light enhanced vertex data from the light machine and determines intersections of edges of the graphics primitive with view clipping planes and with any user specified model clipping planes. The resulting clipped vertex data from the clipping machine is provided to the plane equation machine. The plane equation machine calculates plane equations defining geometries formed by the clipped vertex data and provides the calculated plane equations to the computer graphics system for display.
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Rojas Edmundo
Rossin Theodore G.
Strunk Glenn W.
Hewlett--Packard Company
Nguyen Kimbinh T.
Zimmerman Mark K.
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