projection of a point on a line

Question

i need to project a point on a line. i have two waypoint positions w0 and w1 , and a point P. I have tried.

projectedPoint = Vector3.Project( (P-w0), (w1-w0))

But Debug.DrawLine(projectedPoint, P); does not intersect the line (w1-w0)

Since Vector3.Project(); doe not show any example, I am confused how to use it.

Please help.

Answer 1

Best Answer

Answer by aldonaletto · Jun 06, 2012 at 12:44 PM

Your code seems almost right: you're creating a vector w0->P and projecting it on w0->w1, but the result will be a vector based on 0,0,0. Add w0 to the result and you should obtain a point in the line:

 projectedPoint = Vector3.Project((P-w0),(w1-w0))+w0;

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MountDoomTeam · Mar 21, 2013 at 11:33 AM 0

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very many thanks for that solution!

projection of a point on a line

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