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HP Labs Technical Reports
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CellFast: Interactive Unstructured Volume Rendering
Wittenbrink, Craig M.
HPL-1999-81R1
Keyword(s): tetrahedral cell; irregular grid; volume visualization; OpenGL; visibility sorting; quicksort; triangle fan
Abstract: Shirley and Tuchman's projected tetrahedra approach is a fast algorithm for unstructured volume visualization, because it generates triangles that may be rendered by hardware acceleration. In this paper, I explore optimizations using OpenGL triangle fans, customized quicksort, memory organization for cache efficiency, display lists, and tetrahedral culling. The optimizations improve the performance of projected tetrahedra rendering to provide 1 frame/second for 240,122 tetrahedral cells, 3 frames/second for 70,125 tetrahedral cells, and 15 frames/second for 12,936 tetrahedral cells. Resolutions of 3840x1024 were rendered by using the HP-Visualize Center at full frame rates.
4 Pages
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