02/04/2003
15-462 Graphics I
30
Angle of Reflection
•Perfect reflection: angle of incident
equals angle of reflection
•Also:
l, n, and r lie in the same plane
•Assume
|l| = |n| = 1, guarantee |r| = 1
Solution: a = -1
and
b = 2 (l ¢ n)
Perhaps
easier geometrically
