Patents by Inventor Tom A. Dye

Tom A. Dye has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Circuit for determining non-homogenous second order perspective texture mapping coordinates using linear interpolation
    Patent number: 6052127
    Abstract: A texture value determining (TVD) circuit approximates non-homogenous 2nd order perspective texture mapping to provide texture for a polygon using linear interpolation and input parameters. The TVD circuit of the present invention includes a vertical walk subcircuit and an orthogonal walk subcircuit. The vertical walk subcircuit determines texture coordinates, u(a.sub.0,n) and v(a.sub.0,n) that represent the pixels along a vertical main slop of a triangle polygon. The orthogonal walk subcircuit determines texture coordinates, u(a.sub.m,n) and v(a.sub.m,n), for orthogonally walked polygon coordinate positions for which m>0. The orthogonally walked coordinate positions represent individual scan lines. The vertical walk subcircuit of the TVD circuit includes adders, latches, and accumulators. Each element of the vertical walk subcircuit receives a vertical main slope clock (n-clock) signal. An output of the vertical walk subsystem is computed based on the relationship,u(a.sub.0,n)=u(a.sub.0, n-1)+du.sub.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: April 18, 2000
    Assignee: Cirrus Logic, Inc.
    Inventors: Gautam P. Vaswani, Michael K. Larson, Tom A. Dye, Daniel Wilde