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Unformatted text preview: n n-sided polygon for each n-valence vertex (Valence
being the number of edges that touch the vertex). Doo-Sabin Subdivision (3) The new mesh will be composed of
– quadrilaterals for each edge in the old mesh,
– a smaller n-sided polygon for each n-sided polygon in the
old mesh, and
– an n-sided polygon for each n-valence vertex (Valence
being the number of edges that touch the vertex). Doo-Sabin Subdivision
• Proposed by Doo and Sabin in 1978
• An extension of Chaiken’s algorithm to 3D mesh surfaces http://www.rose-hulman.edu/~finn/CCLI/Applets/DooSabinApplet.html Catmull-Clark Subdivision
• A face with n edges are subdivided into n
• Quads are better than triangles at capturing the
symmetries of natural and man-made objects. Catmull-Clark Subdivision
FACE EDGE VERTEX http://www.rose-hulman.
html Modeling with Catmull-Clark
• Subdivision produces smooth continuous surfaces.
• How can “sharpness” and creases be controlled in a
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This document was uploaded on 03/26/2014.
- Spring '14