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Re: 3D geometry problem
Posted:
Apr 1, 2012 9:39 AM


> 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
PS: I'm reading and responding to this on the Math Forum. AFAIK, your message has not yet appeared on other lists.



