Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension
Patent
1997-09-11
1999-04-27
Nguyen, Phu K.
Computer graphics processing and selective visual display system
Computer graphics processing
Three-dimension
345427, 345521, G06T 1500
Patent
active
058984372
ABSTRACT:
A method and apparatus for fast rendering of objects or scenes on a display controlled by a computer system. The scene to be rendered is stored as a series of triangle lists in an object data file. The triangle lists are presorted by the system into front- and back-facing triangles, as determined by scalar products of the triangle's normal vector with a vector from each respective triangle to the user's selected viewpoint. An array of pointers is generated for the front-facing triangles, and another array is generated for the back-facing triangles. The object or scene is rendered by first loading the attributes for the front-facing triangles to a frame buffer controller, then processing all of the front-facing triangles sequentially, without switching back and forth between front- and back-facing triangles. The attributes for the back-facing triangles are then loaded, and the back-facing triangles are then all processed sequentially. If culling of either front- or back-facing triangles is selected by the user, then that set of triangles is not processed. The data generated in the processing of the front- and back-facing triangles are used to drive the display.
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Shirley, et al,"APolygonal Approximation to Direct Scalar Volume Rendering", Computer Graphics, v 24, n 5, Nov., pp. 63-70.
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Sarkis Barsamian, "Use of Parallel Processors in a Photo Based Image Generator", IEEE National Aerospace and Electronics Conference, vol. 2, May 1990, pp. 688-689.
Kivlin B. Noel
Nguyen Phu K.
Sun Microsystems Inc.
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