Determining texture coordinates in computer graphics

Details Determining texture coordinates in computer graphics Determining texture coordinates in computer graphics

1996-11-15

1999-05-04

Feild, Joseph H.

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

G06T 1140

Patent

active

059008822

ABSTRACT:
The texture coordinates (u,v) of a point Q' are determined by: (1) determining the modified texture coordinates (u',v')=(u/z,v/z) by linear interpolation, where z is a world coordinate; (2) determining 1/z by linear interpolation; and (3) dividing (u',v') by 1/z. The division is replaced with multiplying (u',v') by the inverse of 1/z. The inverse is obtained using a lookup table (LUT). The LUT stores inverses of a few values. Linear interpolation is applied to the LUT output to increase the inverse value accuracy.

REFERENCES:
patent: 3748447 (1973-07-01), Hajicek et al.
patent: 4779218 (1988-10-01), Jauch
patent: 4838233 (1989-06-01), Knierim
patent: 5012438 (1991-04-01), Yamaguchi
patent: 5594846 (1997-01-01), Donvovan
patent: 5704024 (1997-12-01), Voorhies et al.
Segal, M. et al., "Fast Shadows and Lighting Effects Using Texture Mapping", Computer Graphics, 26, 2, Jul. 1992, pp. 249-252.
Foley, J.D. et al., "Computer Graphics: Principles and Practice" (Addison-Wesley Publishing Company, 2nd ed. in C, 1996), pp. 72-104.
Burger, P. et al., "Interactive Computer Graphics" (Addison-Wesley Publishing Company, 1989), pp. 76-110.
U.S. application No. 08/749,859, Sang-Gil Choi, filed Nov. 15, 1986.
Ferraro, Richard F., "Learn 3D Graphics Programming on the PC" (Addison-Wesley Developers Press 1996), pp. 353-415.
Foley, J.D. et al., "Computer Graphics: Principles and Practice" (Addison-Wesley Publishing Company, 2nd ed. in C, 1996), pp. 826-828.
Heckbert, P.S., "Survey of Texture Mapping", IEEE Computer Graphics and Applications (1986), pp. 56-67.
Williams, L., "Pyramidal Parametrics", Proceeding of SIGGRAPH '83, Computer Graphics, vol. 17, No. 3, Jul. 1983, pp. 1-11.
Knittel, G. et al., "Hardware for Superior Texture Performance", Proceedings of 10th Eurographics Workshop on Graphics Hardware (1995), pp. 33-40.
Ackermann, H., "Single Chip Hardware Support for Rasterization and Texture Mapping", Proceedings of 10th Eurographics Workshop on Graphics Hardware (1995), pp. 15-24.
Ferrari, D., "A Division Method Using a Parallel Multiplier", IEEE Transactions on Electronic Computers Apr. 1967, pp. 224-226.

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