Subject:
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Math Problem Again
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Newsgroups:
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lugnet.cad.dev
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Date:
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Thu, 13 Nov 2003 23:53:56 GMT
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Viewed:
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1785 times
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You are given three 3d cooridates.
This makes a triangle in 3d space. The z values may all be three different, so
it may be rotated in almost*) any direction.
I am just interested of the plane; the surface it makes.
Now, we have a forth point, with only x and y values given. I wish to calculate
the z value where this line meets the plane from the triangle (* -> they will
meet, but not necesserily within the triangle)
If possible, I would like an Excel spreadsheet, but just the formula will do.
TIA,
/Tore
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Message has 1 Reply:
 | | Re: Math Problem Again
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| (...) (URL) you how to derive the equation of a plane passing thru the three points (x1,y1,z1) (x2,y2,z2) (x3,y3,z3) The standard equation of a plane in 3 space is A.x + B.y + C.z + D = 0 (where the "." means times) So given three points in space (...) (20 years ago, 14-Nov-03, to lugnet.cad.dev)
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