Diamond culling of small primitives

Details Diamond culling of small primitives Diamond culling of small primitives

2007-12-11

2007-12-11

Chauhan, Ulka (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

Reexamination Certificate

active

10913637

ABSTRACT:
Graphics processing devices and methods are provided for culling small primitives that do not cover any pixels. A boundary (e.g., a diamond) is defined around a pixel center, with pixel coverage being determined for some types of primitives based on whether the boundary is crossed. The boundaries divide the raster into internal regions and external regions. Each region is assigned a unique canonical identifier. Each vertex of a primitive is assigned the canonical identifier corresponding to the region that contains that vertex. The canonical coordinates of the vertices are used to cull primitives that do not satisfy the boundary crossing coverage rules for any pixels.

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