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How to check relative coordinates?

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August 31, 2009, 06:59	How to check relative coordinates?	#1
sega Senior Member Sebastian Gatzka Join Date: Mar 2009 Location: Frankfurt, Germany Posts: 729 Rep Power: 13	Hello World. I need to check if three points form a plane and are not aligned in a line. Can anyone tell me how this could be done? S. __________________ Schrödingers wife: "What did you do to the cat? It's half dead!"

September 1, 2009, 14:09		#2
l_r_mcglashan Senior Member Laurence R. McGlashan Join Date: Mar 2009 Posts: 370 Rep Power: 16	If you have points 1,2 and 3, the cross product of vector 1->2 and 1->3 will be zero if they all lie on the same line. I think... __________________ Laurence R. McGlashan :: Website

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