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Topic: 3D geometry problem
Replies: 4   Last Post: Apr 2, 2012 11:53 AM

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Robert H. Lewis

Posts: 284
Registered: 12/8/04
Re: 3D geometry problem
Posted: Apr 1, 2012 9:39 AM
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> Hi Forum,
> It's my first post here so sorry if this is not
> exactly the right group to post in.
> I've been struggling for days on a 3D geometry
> problem that I need to solve for a program I'm
> coding. I'm officially stuck so I implore you to at
> least point me in the right direction.
> The attached picture describes it all. I need to
> define the 3D coordinate of C and D knowing the point
> of view ray and the plan equation. (for
> simplification you can assume that the plan is flat
> at z=0)
> I know A and B position. (B is deduced from the
> intersection of the line R and the plane). Beta is
> the pov angle and alpha is given.

There doesn't seem to be enough information. Are you assuming something about the position of the observer? Is that a known point?

Robert H. Lewis
Fordham University

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