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Conversion of trimmed NURBS . . . Catmull-Clark subdivision surfaces (2014)
| Content Provider | CiteSeerX |
|---|---|
| Author | Shen, Jingjing Kosinka, Jiri Sabin, Malcolm A. Dodgson, Neil A. |
| Abstract | We introduce a novel method to convert trimmed NURBS surfaces to untrimmed subdivision surfaces with Bézier edge conditions. We take a NURBS surface and its trimming curves as input, from this we automatically compute a base mesh, the limit surface of which fits the trimmed NURBS surface to a specified tolerance. We first construct the topol-ogy of the base mesh by performing a cross-field based de-composition in parametric space. The number and positions of extraordinary vertices required to represent the trimmed shape can be automatically identified by smoothing a cross field bounded by the parametric trimming curves. After the topology construction, the control point positions in the base mesh are calculated based on the limit stencils of the subdivi-sion scheme and constraints to achieve tangential continuity across the boundary. Our method can provide the user with |
| File Format | |
| Publisher Date | 2014-01-01 |
| Access Restriction | Open |
| Content Type | Text |
