Approximation of Catmull-Clark subdivision surfaces by...

Details Approximation of Catmull-Clark subdivision surfaces by... Approximation of Catmull-Clark subdivision surfaces by...

2005-09-27

2005-09-27

Zimmerman, Mark (Department: 2671)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

C345S442000

Reexamination Certificate

active

06950099

ABSTRACT:
A method for converting a subdivision surface, such as a Catmull-Clark subdivision surface, into a cubic Bezier surface defined by sixteen control points. The method includes (a) converting a subdivision face to Bezier control points using a conversion matrix using fifteen points and a dummy value for an unavailable sixteenth point; and (b) replacing one of the Bezier control points which corresponds to an extraordinary point on the subdivision face with the extraordinary point's limit point.

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Jos Stam. “Exact Evaluation of Catmull-Clark Subdivision Surfaces At Arbitrary Parameter Values.” Alias/Wavefront, Inc.

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