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 Diffuse Geometry:

 i is the unit vector in the direction of the
illumination (light source)
 n is the unit vector normal to the surface
 r is the unit vector in the mirror reflection direction
 v is the unit vector in the direction of the eyepoint
 Formulas:


 r and are not needed
CS488/688: Introduction to Interactive Computer Graphics
University of Waterloo
Computer Graphics Lab
cs488@cgl.uwaterloo.ca