Circuit for determining non-homogenous second order perspective

Details Circuit for determining non-homogenous second order perspective Circuit for determining non-homogenous second order perspective

1996-12-30

2000-04-18

Nguyen, Phu K.

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

G06F 1500

Patent

active

060521279

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,

REFERENCES:
patent: 4583185 (1986-04-01), Heartz et al.
patent: 4586038 (1986-04-01), Sims
patent: 4692880 (1987-09-01), Merz et al.
patent: 4714428 (1987-12-01), Bunker et al.
patent: 4715005 (1987-12-01), Heartz
patent: 4727365 (1988-02-01), Bunker et al.
patent: 4811245 (1989-03-01), Bunker et al.
patent: 4821212 (1989-04-01), Heartz
patent: 4825391 (1989-04-01), Merz
patent: 4855937 (1989-08-01), Heartz
patent: 4862388 (1989-08-01), Bunker
patent: 4905164 (1990-02-01), Chandler et al.
patent: 4958305 (1990-09-01), Piazza
patent: 4965745 (1990-10-01), Economy et al.
patent: 5126726 (1992-06-01), Howard et al.
patent: 5187754 (1993-02-01), Currin et al.
patent: 5191642 (1993-03-01), Quick et al.
patent: 5268996 (1993-12-01), Steiner et al.
patent: 5293467 (1994-03-01), Buchner et al.
patent: 5357579 (1994-10-01), Buchner et al.
patent: 5367615 (1994-11-01), Economy et al.
patent: 5420970 (1995-05-01), Steiner et al.
patent: 5651106 (1997-07-01), Ashburn
patent: 5680525 (1997-10-01), Sakai et al.
patent: 5701405 (1997-12-01), Kelley et al.

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