Computer graphics processing and selective visual display system – Computer graphics processing – Graph generating
Patent
1996-12-30
1998-11-10
Nguyen, Phu K.
Computer graphics processing and selective visual display system
Computer graphics processing
Graph generating
G06F 1500
Patent
active
058350977
ABSTRACT:
In a computer system having a host processor, a peripheral graphics device, a display screen, and a memory, a non-homogenous second order perspective texture mapping process. Polygon coordinates, a.sub.m,n, defining a texture polygon, are received. Initial values are received for a set of parameters including u.sub.main, v.sub.main, dv.sub.ortho, dv.sub.main, du.sub.ortho, du.sub.main, d.sup.2 u.sub.ortho, d.sup.2 u.sub.main, d.sup.2 v.sub.ortho, d.sup.2 v.sub.main, du.sub.ortho-ADD, and dv.sub.ortho-ADD. The texture polygon includes span regions. A span value, j, is set to an initial value to designate an initial span region of the texture polygon in (m, n) polygon coordinate space. The total number of rows, n.sub.max, is determined for the current span region of the polygon. The total number of polygon coordinates, m.sub.max, in the current row, n, of the texture polygon is determined. An (x, y) display coordinate, corresponding to the current polygon coordinate, a.sub.m,n, is set by translating from (m, n) polygon space to (x, y) display coordinate space. Texture coordinates, u(a.sub.m,n) and v(a.sub.m,n), are determined, according to the present invention, for each polygon coordinate, a.sub.m,n, using linear interpolation based on a set of relationships that utilize the above parameters without using a repetitive divide operation. A display pixel of a color determined according to texture coordinates, u(a.sub.m,n) and v(a.sub.m,n), is rendered on a display screen at the determined (x, y) position.
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: 5745667 (1998-04-01), Kawase et al.
patent: 5751293 (1998-05-01), Hashimoto et al.
Dye Tom
Larson Michael
Vaswani Gautam P.
Cirrus Logic Inc.
Nguyen Phu K.
Shaw Steven A.
LandOfFree
Non-homogenous second order perspective texture mapping using li does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-homogenous second order perspective texture mapping using li, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-homogenous second order perspective texture mapping using li will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1521190