Radiosity redistribution for dynamic environments

Author

George, David W. ; Sillion, François X. ; Greenberg, Donald P.

Author_Institution

Cornell Univ., Ithaca, NY, USA

Volume

10

Issue

4

fYear

1990

fDate

7/1/1990 12:00:00 AM

Firstpage

26

Lastpage

34

Abstract

The radiosity algorithm is extended to dynamic environments, providing global-illumination simulations to scenes that are modified interactively. The illumination effects introduced by a change in position, shape, or attributes of any object in the scene are computed very rapidly by redistributing the energy already exchanged between objects. Corrections are made by shooting positive and negative energy, accounting for increased illumination and the creation of shadows. Object coherence is used to minimize computation, and progressive-refinement techniques are used to accelerate convergence. The extended algorithm yields excellent approximations to the exact solutions at interactive speeds.<>

Keywords

computational geometry; computer graphics; convergence of numerical methods; geometrical optics; approximations; convergence; dynamic environments; global-illumination simulations; illumination effects; interactive speeds; negative energy; progressive-refinement techniques; radiosity distribution; shadows; Aging; Application software; Bismuth; Computer graphics; Costs; Displays; Geometry; Layout; Lighting; Workstations;

fLanguage

English

Journal_Title

Computer Graphics and Applications, IEEE

Publisher

ieee

ISSN

0272-1716

Type

jour

DOI

10.1109/38.56296

Filename

56296