Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension
Reexamination Certificate
2007-11-06
2007-11-06
Nguyen, Kimbinh T. (Department: 2628)
Computer graphics processing and selective visual display system
Computer graphics processing
Three-dimension
C345S422000, C345S581000, C345S620000, C345S622000, C345S623000, C345S624000
Reexamination Certificate
active
10917093
ABSTRACT:
Clipping techniques introduce additional vertices into existing primitives without requiring creation of new primitives. For an input triangle with one vertex on the invisible side of a clipping surface, a quadrangle can be defined. The vertices of the quadrangle are the two internal vertices of the input triangle and two clipped vertices. For determining attribute values for pixel shading, three vertices of the quadrangle are selected, and a parameter value for an attribute equation is computed using the three selected vertices. For determining pixel coverage for the quadrangle, the three edges that do not correspond to the edge created by clipping are used.
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Olano et al., “Triangle scan conversion using 2D homogeneous coordinates”, Proceedings of the 1997 SIGGRAPH / Eurographics Workshop on Graphics Hardware (New York City, NY) ACM Press, 1997, pp. 89-96.
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Montrym John S.
Moreton Henry Packard
Parikh Vimal S.
Voorhies Douglas A.
Wittenbrink Craig M.
Nguyen Kimbinh T.
NVIDA Corporation
Townsend and Townsend / and Crew LLP
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