Piecewise Smooth Subdivision Surfaces with Normal Control
D. Zorin, H. Biermann and A. Levin
In this paper we introduce improved rules for
Catmull-Clark and Loop subdivision that overcome
several problems with the original schemes,
namely, lack of smoothness at extraordinary boundary
vertices and folds near concave corners.
In addition, our approach to
rule modification allows generation of surfaces with
prescribed normals, both on the boundary and in the
interior, which considerably improves control of the
shape of surfaces.
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author = "H. Biermann and A. Levin and D. Zorin",
title = "Piecewise Smooth Subdivision Surfaces With Normal Control",
booktitle = "Proceedings of SIGGRAPH 2000,
Computer Graphics Proceedings, Annual Conference Series",
year = 2000,
pages = "113--120")