The Object-Space Parallel Processing of the Multipass Rendering Method on the (Mπ)2 with a Distributed-Frame Buffer System

Hitoshi YAMAUCHI  Takayuki MAEDA  Hiroaki KOBAYASHI  Tadao NAKAMURA  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E80-D   No.9   pp.909-918
Publication Date: 1997/09/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Issue on Architectures, Algorithms and Networks for Massively Parallel Computing)
Category: Computer Architecture
Keyword: 
massively parallel processing system,  global illumination model,  multipass rendering method,  ray-tracing,  radiosity,  object-space parallel processing model,  distributed frame buffer system,  

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Summary: 
The multipass rendering method based on the global illumination model can generate the most photo-realistic images. However, since the multipass rendering method is very time consuming, it is impractical in the industrial world. This paper discusses a massively parallel processing approach to fast image synthesis by the multipass rendering method. Especially, we focus on the performance evaluation of the view-dependent object-space parallel processing on the (Mπ)2 which has been proposed in our previous paper. We also propose two kinds of distributed frame buffer system named cached frame buffer and multistage-interconnected frame buffer. These frame buffer systems can solve the access conflict problem on the frame buffer. The simulation results show that the (Mπ)2 has a scalable performance. For example, the (Mπ)2 with more than 4000 processing elements can achieve an efficiency of over 50%. We also show that both of the proposed distributed frame buffer systems can relieve the overhead due to frame buffer access in the (Mπ)2 in the case that a large number of high-performance processing elements are adopted in the system.