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Computing a Reflected Ray

NB : ||Rin|| = ||Rout|| = 1

Rin an Rout are unit vector

The projection of Rin onto N is -N cos (q) so

Rout - Rin = - 2N cos(q) = -2N.( N.Rin )

Rout = Rin - 2N(N.Rin)

You can form a losange with Rin and Rout

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Pascal Vuylsteker / eScience / Computer Science / ANU 		Last modified: 20/4/2004
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