Patent ID: 6433789
Filing Date: 2002-08-13
Classification: G06T

Abstract:
In a three-dimensional graphics display system in which texture maps of an object are stored in memory for texels at (u,v) memory locations, a method of fetching texels for use in calculating (x,y) display pixel values comprising the steps of:a) identifying in (u,v) space a geometric shape to be displayed in (x,y) space, b) establishing tiles of pixels within the geometric shape for use in accessing texels, c) computing texel addresses at one side of a pixel-tile based on current addresses (topuc, topvc) and first and second derivatives of (u,v) as a function of (x) and a first derivative as a function of (y), d) computing texel addresses at an opposing side of the tile based on current addresses (u0,v0) and first and second derivatives of (u,v) as a function of (x) and a first derivative as a function of (y), and e) fetching texel blocks within the tiles as defined by the addresses in steps c) and d).