Patent ID: 6816167
Filing Date: 2004-11-09
Classification: G06T,H01L

Abstract:
An anisotropic filtering method comprising:defining pixel elements in two dimensions; defining an object having three dimensional surfaces in a three dimensional model space; storing data elements in two dimensions defining a texture map related to the three dimensional surfaces of the object; dividing a subject pixel element to be texture mapped into a plurality of sub-pixel elements; texture mapping ones of the sub-pixel elements separately onto corresponding footprints on the texture map to obtain sub-pixel element textures based on the corresponding footprints; and combining at least some of the sub-pixel element textures obtained from the corresponding footprints on the texture map to obtain a texture for the subject pixel element; wherein the texture map comprises a plurality of Mip Maps of different levels of detail, the Mip Map level of detail is chosen separately for the ones of the pixel or sub-pixel elements, and the Mip Map level of detail is chosen at least in part according to the number of sub-pixel elements that the subject pixel element is divided into.