(idea) by Monolith Tue Nov 19 2002 at 4:22:03

The projection of v onto u, where u and v are both vectors in the same dimension euclidean vector space is as follows:

proju(v) =

(u • v)
------------ u
|u|2

or assuming u is a unit vector...

(u • v) u

The resulting vector will be a scalar multiple of u.
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