Method and apparatus for dual pass adaptive tessellation

Details Method and apparatus for dual pass adaptive tessellation Method and apparatus for dual pass adaptive tessellation

2006-09-19

2006-09-19

Nguyen, Kimbinh T. (Department: 2671)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

C345S419000, C345S502000, C345S505000, C345S506000, C345S519000, C345S532000, C345S536000, C345S538000

Reexamination Certificate

active

07109987

ABSTRACT:
A method and apparatus for dual pass adaptive tessellation includes a vertex grouper tessellator operably coupled to receive primitive information and an index list and a shader processing unit coupled to the vertex grouper tessellator. During a first pass, the shader processing unit receives primitive indices generated from the primitive information and an auto-index value for each of the plurality of primitive indices. The method and apparatus further includes a plurality of vertex shader input staging registers operably coupled to the shader sequence, wherein the plurality of vertex shader input staging registers are coupled to a plurality of vertex shaders such that in response to a shader sequence output, the vertex shaders generate tessellation factors. The tessellation factors are provided to the vertex grouper tessellator such that the vertex grouper tessellator generates a per-process vector output, a per primitive output and a per packet output during a second pass.

REFERENCES:
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patent: 6078331 (2000-06-01), Pulli et al.
patent: 6697063 (2004-02-01), Zhu
patent: 6819325 (2004-11-01), Boyd et al.
patent: 6965908 (2005-11-01), Shaw

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