The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 2000
Filed:
Oct. 10, 1997
Daniel P Wilde, Cedar Park, TX (US);
Cirrus Logic, INC, Austin, TX (US);
Abstract
A graphics system includes a graphics controller for rendering polygons with texture using an improved MIP mapping technique in which texels from multiple MIP maps are blended together. The graphics controller includes a polygon engine for rendering the pixels in a polygon and at texture map engine for selecting texture elements ('texels') from an appropriate texture map to be applied to the pixels rendered by the polygon engine. The texture map engine generates texel coordinate values from pixel coordinate values provided by the polygon engine. Texel values are selected from a set of texture maps each map varying from the others by the level of detail of the texture in each map. The graphics controller computes a scale factor for each texel value according an are a bounded by adjacent texel coordinates generated by the texture map engine. The scale factor is then used to compute a weighted average of texels form more than one MIP maps. In the preferred embodiment, vectors are defined for each the adjacent texels and the area is determined from the magnitude of the cross product of the vectors.