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Abstract

The radiosity technique uses the heat transfer theory to define a view-independent illumination model. For complex scenes, calculation of this model is very time-intensive, due largely to the determination of a geometric factor, defined with a double area integral, and named form factor. This paper presents a new expression of the form factor, which can be reformulated, in a computationally more efficient manner, as a simple line integral for planar polygonal convex surfaces that are perfectly diffuse. Recently, parallel computers have been used to decrease calculation time. Previous work is focused mainly on distributed implementations of the progressive refinement method, widely used for complex environments. The T.Node is a completely reconfigurable MIMD machine, based on the transputer chip. In this paper, a parallel implementation of the progressive refinement method is compared with a direct method which takes into account the memory capabilities of this kind of machine.

Additional information

Authors: MICHELIN S, Université de Franche-Comté, Laboratoire d'Informatique de Besançon (FR);ARQUES D, Université de Franche-Comté, Laboratoire d'Informatique de Besançon (FR);MAFFEIS G, Università degli Studi di Milano, Dipartimento di Scienze dell' Informazione (IT);GROSSETIE J C, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Eurographics '93, Barcelona (ES), September 6-10, 1993
Availability: Available from (1) as Paper EN 37782 ORA
Record Number: 199311268 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: en
Available languages: en