3d geometry... help please.

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#379

From: Michael Duffy
Date: Sat, 01 Aug 1992 17:11

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Ok, boys and girls, children of all ages... here's something for you to ponder.

I'm trying to figure out the FASTEST way to figure out the angle between two
rays in space, given any three points (say (a,b,c), (d,e,f), and (g,h,i) with 
(d,e,f) as the point where both rays originate).  It has been two many years
since I took Trig or Geometry or whichever math would help me out here.  
Pseudo code, equations, C, Pascal, or Assembly is appreciated.  T
Thanks in advance for any information,
Mike Duffy (mduffy@aludra.usc.edu)

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Path: arc1-ca.pugleaf.net!sparky!uunet!usc!chaph.usc.edu!news
From: mduffy@aludra.usc.edu (Michael Duffy)
Newsgroups: rec.games.programmer
Subject: 3d geometry... help please.
Date: 1 Aug 1992 10:11:07 -0700
Organization: University of Southern California, Los Angeles, CA
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Sender: Mike Duffy (mduffy@aludra.usc.edu)
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