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Unformatted text preview: ling environment?
ANSWER: Define new subdivision rules for “creased”
edges and vertices.
• Tag Edges sharp edges.
• If an edge is sharp, apply new
sharp subdivision rules.
• Otherwise subdivide with
normal rules. Sharp Edges…
• Tag Edges as “sharp” or “not-sharp”
• n = 0 – “not sharp” • n > 0 – sharp During Subdivision,
• if an edge is “sharp”, use sharp
subdivision rules. Newly created edges,
are assigned a sharpness of n-1.
• If an edge is “not-sharp”, use normal
smooth subdivision rules.
IDEA: Edges with a sharpness of “n” do
not get subdivided smoothly for “n”
iterations of the algorithm.
In the picture on the right, the control
mesh is a unit cube ● ● Different sharpness applied Sharp Rules
FACE (unchanged) EDGE VERTEX
# adj. Sharp edges corner
2 Another example of creases Subdivision Surfaces in character
• Used for first time in
Geri’s game to
restriction of NURBS
• Modeled Geri’s head,
hands, jacket, pants,
shirt, tie, and shoes Ge...
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This document was uploaded on 03/26/2014.
- Spring '14