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authors Kumar, Subodh and Manocha, Dinesh
year 1995
title Efficient rendering of trimmed NURBS surfaces
source Computer-Aided Design, Vol. 27 (7) (1995) pp. 509-521
summary An algorithm for the interactive display of trimmed nurbs surfaces is presented. The algorithm converts the nurbs surfaces to Bézier surfaces, and nurbs trimming curves toBézier curves. It tessellates each trimmed Bézier surface into triangles, and renders them using the triangle rendering capabilities common in current graphics systems. Itmakes use of tight bounds for the uniform tessellation of Bézier surfaces into cells and it traces the trimming curves to compute the trimmed regions of each cell. Thisoperation is based on the tracing of trimming curves, intersection computation with the cells, and triangulation of the cells. The resulting technique also makes use of spatialand temporal coherence between successive frames for cell computation and triangulation. Polygonization anomalies such as cracks and angularities are avoided as well. Thealgorithm can display trimmed models described using thousands of Bézier surfaces at interactive frame rates on high end graphics systems.
keywords Trimmed Nurbs, Bezier Surfaces, Rendering
series journal paper
references Content-type: text/plain
last changed 2003/05/15 19:33
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