Smoothing simple polyhedral shapes via recursive subdivision, with the option of maintaining selected sharp edges.

Paper Presentations by Ashish Mohole, Chris Tchou, and Jane Yen

E. Catmul and J. Clark: "Recursively generated B-spline surfaces on arbitrary topological meshes" CAD, Nov. 1978, p350

• What statements can you make about the facets and about the vertices generated after several subdivision steps ?

D.Doo and M. Sabin "Behaviour of recursive division surfaces near extraordinary points" CAD, Nov. 1978, p356

• What statements can you make about the facets and about the vertices generated after several subdivision steps ?

Tony DeRose et.al. "Subdivision Surfaces in Character Animation" SIGGRAPH 1998.

• How useful are the generated surfaces for rapid prototyping ?
• How do you create a crease that starts with a sharp dihedral angle at one vertex and then looses itself in a smooth surface ?

FINALIZE THE PLAN FOR PROJECT PRESENTATIONS
Determine a convenient 3hr time slot for final project presentations around May 17.

Assignment: READ the papers for the upcoming lectures and answer the stated questions