Illumination and shadow simulation in a computer graphics/imagin

Details Illumination and shadow simulation in a computer graphics/imagin Illumination and shadow simulation in a computer graphics/imagin

1996-10-29

2000-01-25

Powell, Mark R.

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

345422, 345430, 345432, 345136, 345138, G06T 1550

Patent

active

060183500

ABSTRACT:
The total illumination of each pixel to be displayed by a real-time computer image generator, is determined for at least one source illuminating a scene to be displayed, by storing in an observer depth buffer data signals representing those portions of object polygons visible to the observer in each pixel of the display, and storing in a source depth buffer, associated with each of the at least one scene-illuminating light sources, data signals representing illumination intensity received by each polygon pixel viewable from that associated source. A data signal, for each displayable pixel in the observer depth buffer, is generated by combining in non-saturating manner the illumination intensity of each light source impingent upon the equivalent pixel in all of the associated source depth buffers.

REFERENCES:
patent: 4908780 (1990-03-01), Priem et al.
patent: 5043922 (1991-08-01), Matsumoto
patent: 5201030 (1993-04-01), Carrie
patent: 5377313 (1994-12-01), Scheibl
patent: 5668940 (1997-09-01), Steiner et al.
"Computer Graphics: Principles and Practice", Foley et al., Second edition, 1996, pp. 722-723.

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