Fast alpha transparency rendering method

Details Fast alpha transparency rendering method Fast alpha transparency rendering method

1997-01-06

1999-07-13

Nguyen, Phu K.

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

G06F 1500

Patent

active

059233338

ABSTRACT:
A fast method for rendering opaque and transparent objects that produces a higher quality image at a greater speed for a given level of hardware support. Opaque objects are rendered first utilizing the z-buffer as a solids only depth buffer. Transparent objects are then rendered in multiple passes. Transparent objects are processed in a back to front order to eliminate surface anomalies. The z-buffer is utilized in an alternative mode so that the front-most surfaces of objects in a scene are processed last. Back-facing primitives of transparent objects are rendered and alpha blended first and then the front-facing primitives are rendered and alpha blended second.

REFERENCES:
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patent: 5596686 (1997-01-01), Duluk, Jr.
Foley, J., vanDam, A., Feiner, S., Hughes, J., Computer Graphics, Principles and Practice, Second Edition, Addison-Wesley Publishing Company, Inc., 1990, pp. 663-695, 754-756.

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