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:
Aug. 29, 2006
Filed:
Sep. 24, 2003
Boris Prokopenko, Milpitas, CA (US);
Timour Paltashev, Fremont, CA (US);
Derek Gladding, San Francisco, CA (US);
Boris Prokopenko, Milpitas, CA (US);
Timour Paltashev, Fremont, CA (US);
Derek Gladding, San Francisco, CA (US);
VIA Technologies, Inc., , TW;
Abstract
A method and apparatus for obtaining an attribute in homogenous space. After obtaining the vertices of a triangle, the world space coordinates and the attribute of each vertex are transformed to homogeneous coordinates and an attribute in viewer space. Then a set of homogenous coefficients of the triangle is computed based on the viewer space vertex homogeneous coordinates, and the viewer space coordinates of each vertex are projected to coordinates in screen space. Pixels in the screen space that are affected by the projected triangle are determined. For each pixel affected by the triangle, a set of barycentric coefficients in viewer space is computed, based on the homogenous triangle coefficients, and a linear interpolation is performed based on the set of viewer space barycentric coefficients and the viewer space attributes of the triangle vertices to obtain the attribute of the pixel affected by the triangle.