02/14/2002
15-462 Graphics I
2
Polygonal Shading
•Curved
surfaces are approximated by polygons
•How do
we shade?
–Flat
shading
–Interpolative
shading
–Gouraud
shading
–Phong
shading (different from Phong
illumination)
•Two
questions:
–How do
we determine normals at vertices?
–How do
we calculate shading at interior points?