Path: utzoo!attcan!uunet!seismo!dimacs.rutgers.edu!rutgers!netnews.upenn.edu!grasp.cis.upenn.edu!sichen
From: sichen@grasp.cis.upenn.edu (the S T R A N G E R ???!!!)
Newsgroups: comp.graphics
Subject: How to determine 4 points in a 3D plane??
Message-ID: <31644@netnews.upenn.edu>
Date: 24 Oct 90 12:36:37 GMT
Sender: news@netnews.upenn.edu
Reply-To: sichen@grasp.cis.upenn.edu (the S T R A N G E R ???!!!)
Organization: University of Pennsylvania
Lines: 19


Hi Netters..

  I am looking for the algorithm (pseudocode is fine) to determine any 4 given
abitrary points p(x,y,z) that lie in the same plane...e.g. The algorithm should
work for the following points ..

	a)	p1=[1,1,0]
		p2=[0,2,1]
		p3=[1,0,2]
		p4=[3,-1,2]

	b)	p1=[4, 2, 1]
		p2=[0, -3, 4]
		p3=[2, 0, 3]
		p4=[1, 4, 1]

  Thanks in advance for you help..
							si