Subject:
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need Help finding a co-ordinate
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Newsgroups:
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lugnet.cad
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Date:
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Mon, 11 Sep 2000 16:36:49 GMT
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Viewed:
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447 times
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Does anyone have a program or an algorithm that does the following:
Given four points in three dimension space (four corners of a quad,) and an
(X,Y) co-ordinate on the quad, calculate the Z co-ordinate so the fifth point
is on the quad.
In other words, how do I find a point that is on a quad?
Dennis
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Message has 1 Reply:
 | | RE: need Help finding a co-ordinate
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| (...) Ummm, if you mean co-planar, there is no guarantee that 4 points are coplanar in 3-space. however, 3 points are always coplanar. If the 4 points ARE coplanar, then throw out one of the points and figure out the equation of the plane described (...) (24 years ago, 11-Sep-00, to lugnet.cad)
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