Patent ID: 6040837
Filing Date: 2000-03-21
Classification: G06T

Abstract:
A method for space variant texture filtering, the method comprises the steps of:a) obtaining texture coordinates for a given pixel of an object being rendered;b) determining a first axis derivative and a second axis derivative based on the texture coordinates;c) when the first and second axis derivatives have differing degrees of magnitude, determining whether the first axis derivative or the second axis derivative corresponds to a major axis;d) determining a number of samples along the major axis based on a logarithmic function of a ratio between the first and second axis derivatives;e) determining separation between the samples based on derivatives along the major axis;f) referencing one of a plurality of related texture maps based on derivatives along a minor axis to obtain the samples; andg) filtering the samples based on the number of samples to obtain a filtered texel for the given pixel.