Using A-buffer in radiosity

Author

Wang, Q. ; Tang, J.H. ; Lim, C.H. ; Teh, H.C. ; Huang, Z.

Author_Institution

Dept. of Comput. Sci., Nat. Univ. of Singapore, Singapore

fYear

2001

fDate

2001

Firstpage

193

Lastpage

200

Abstract

Anti-aliasing in form factor computation and precise determination of shadow boundaries are important issues for radiosity method. A-buffer is a technique introduced by L. Carpenter (1984) for anti-aliasing in hidden surface removal. In this paper, we propose a method based on the A-buffer to replace the Z-buffer in the computation of form factors using the Hemicube for anti-aliasing. The method directly computes shadow boundaries in contrast to the adaptive re-meshing approach. Though the processing of shadow boundaries is not fast, only one discontinuity meshing (no iteration) is required. We implement the method in an infrastructure building design system

Keywords

brightness; computer graphics; hidden feature removal; mesh generation; A-buffer; Hemicube; adaptive re-meshing approach; anti-aliasing; form factor computation; form factors; hidden surface removal; infrastructure building design system; radiosity; shadow boundaries; Application software; Buildings; Computer graphics; Computer science; Heat transfer; Layout; Light sources; Lighting; Rendering (computer graphics); Surface treatment;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Graphics International 2001. Proceedings

Conference_Location

Hong Kong

ISSN

1530-1052

Print_ISBN

0-7695-1007-8

Type

conf

DOI

10.1109/CGI.2001.934674

Filename

934674