Progressive radiosity method on clusters using a new clipping algorithm Online publication date: Fri, 05-Aug-2005
by M. Amor, J.R. Sanjurjo, E.J. Padron, R. Doallo
International Journal of High Performance Computing and Networking (IJHPCN), Vol. 1, No. 1/2/3, 2004
Abstract: Global illumination simulation is highly critical for realistic image synthesis; without it, the rendered images look flat and synthetic. The main problem is that the simulation for large scenes is a high time-consuming process. In this paper, we present a uniform partitioning method in order to split the scene domain into a set of disjoint subspaces which are distributed among the processors of a distributed memory system. Since polygons partially inside several subspaces have to be clipped, we have developed a new clipping algorithm to manage this situation. Memory and communication requirements have been minimised in the parallel implementation. Finally, in order to evaluate the proposed method, we have used a progressive radiosity algorithm, running on two different PC clusters with modern processors and network technologies as a testbed. Good results in terms of speedup have been obtained.
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