Computer graphics system having double buffered vertex ram with

Details Computer graphics system having double buffered vertex ram with Computer graphics system having double buffered vertex ram with

1995-08-08

1997-12-09

Bayerl, Raymond J.

395503, 395123, G06T 160, G06F 1500

Patent

active

056969449

ABSTRACT:
A geometry accelerator for a computer graphics system performs transformations on vertex data representative of graphics primitives, decomposes quadrilaterals into triangles, and performs lighting, clipping and plane equation calculations for each primitive. The geometry accelerator incorporates a memory mapping technique that achieves high efficiency transfer of vertex information from the host computer to the geometry accelerator. A double buffered vertex RAM with granularity permits the quantity of data transferred to the geometry accelerator to be reduced. The transformation and decomposition engines of the geometry accelerator employ data management techniques in which calculations for shared vertices and shared edges of primitives are performed only once.

REFERENCES:
patent: 5307450 (1994-04-01), Grossman
patent: 5392392 (1995-02-01), Fischer et al.
patent: 5408605 (1995-04-01), Deering
patent: 5481651 (1996-01-01), Herold
patent: 5517611 (1996-05-01), Deering

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