Method and apparatus for tessellation lighting

Details Method and apparatus for tessellation lighting Method and apparatus for tessellation lighting

2006-12-05

2006-12-05

Jankus, Almis R. (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

Reexamination Certificate

active

07145564

ABSTRACT:
A method and apparatus for performing tessellation lighting operations for video graphics primitives in a video graphics system is presented. When the vertex parameters corresponding to the vertices of a video graphics primitive are received, a tessellation operation is performed such that a number of component primitives are generated. The vertex parameters corresponding to the vertices of the component primitives are then calculated utilizing the vertex parameters for the original video graphics primitive. Such calculation operations include determining a corresponding normal vector for each component primitive vertex. Each of the component primitives is then individually processed. Such processing may include calculating the lighting effects for each component primitive and performing additional processing operations that generate pixel fragments for the primitive. The resulting pixel fragments are blended with image data stored in a frame buffer, where the image data is used in generating a displayed image.

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