[Numpy-discussion] point line distance

Ian Mallett geometrian@gmail....
Wed Oct 6 16:13:42 CDT 2010


Hi,

A background in linear algebra helps.  I just came up with this method
(which, because I thought of it 5 seconds ago, I don't know if it works):

Line p1, p2
Point v

costheta = normalize(p2-p1) dot normalize(v-p1)
dist = length(v-p1)*sin(acos(costheta)

Ian
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