Appeal No. 2002-1448
Application 09/067,321
to computer controlled graphics display systems utilizing texture
mapping and lighting graphics techniques. Computer controlled
graphics systems are used for displaying graphics objects on a
display. These graphics objects may comprise graphics primitive
elements which include points, lines, polygons, etc. In the
process of rendering 3D graphics, many techniques are used to
create realistic 3D effects. One of the techniques is texture
mapping. See page 1 of Appellants’ specification. Generally,
texture mapping occurs by accessing encoded surface detail points
or “texels” from a texel map memory space. See pages 1 and 2 of
Appellants’ specification. Figure 4 is a flow diagram 300
illustrating a method of displaying graphics images on display
screen 105 in accordance with the Appellants’ invention. The
Appellants’ invention includes a specialized “texel light” code
or “bit” mapped into the texel data which is used by the lighting
processes of the present invention. The “texel light” codes
allow the present invention to apply a given lighting condition
to regions of texture data in a non-uniform manner within a
graphics primitive. See page 13 of Appellants’ specification.
At step 320, of Figure 4, the current graphics primitive is
rasterized into a plurality of pixels, each pixel having a
respective (x,y) display coordinate. At step 325, the current
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Last modified: November 3, 2007