03/13/2003
15-462 Graphics I
17
Concave Polygons: Tessellation
•Approach
3: divide non-convex, non-flat, or non-simple polygons into triangles
•OpenGL
specification
–Need
accept only simple, flat, convex polygons
–Tessellate
explicitly with tessellator
objects
–Implicitly
if you are lucky
•GeForce3
scan converts only triangles