Conversion of Trimmed NURBS Surfaces to Subdivision Surfaces

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• Jingjing Shen (University of Cambridge)
• Thursday 27 February 2014, 11:40-12:00
• Rainbow Seminar Room (SS03), Computer Laboratory.

If you have a question about this talk, please contact Flora Tasse.

We propose a novel approach that automatically converts trimmed NURBS surfaces to Catmull-Clark subdivision surfaces with Bezier edge conditions. The main idea is to first construct the topology of the base mesh for subdivision by performing cross-field based decomposition in the parameter space. The control point positions are then calculated by inverting a linear system built from limit stencils and cross-boundary continuity constraints. Our method achieves the conversion within a specified tolerance and maintains the tangential continuity of adjacent trimmed surfaces. We will also consider the extensions of converting to non-uniform subdivision surfaces and keeping exactly the original cross-boundary continuity.

This talk is part of the Rainbow Group Seminars series.

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