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Subdivision surface
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==Key developments== * 1978: Subdivision surfaces were described by [[Edwin Catmull]] and Jim Clark (see [[Catmull-Clark subdivision surface]]), and by Daniel Doo and Malcom Sabin (see [[Doo-Sabin subdivision surfaces]]). * 1995: [[Ulrich Reif]] solved subdivision surface behaviour near extraordinary vertices.<ref name=Reif>Ulrich Reif. 1995. A unified approach to subdivision algorithms near extraordinary vertices. ''Computer Aided Geometric Design''. 12(2)153β174</ref> * 1998: [[Jos Stam]] contributed a method for exact evaluation for Catmull-Clark subdivision surfaces under arbitrary parameter values.<ref name=Stam> Jos Stam, "Exact Evaluation of Catmull-Clark Subdivision Surfaces at Arbitrary Parameter Values", Proceedings of SIGGRAPH'98. In Computer Graphics Proceedings, ACM SIGGRAPH, 1998, 395β404</ref>
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