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  1. Path: sparky!uunet!ferkel.ucsb.edu!taco!rock!stanford.edu!agate!biosci!uwm.edu!caen!batcomputer!munnari.oz.au!uniwa!watson
  2. From: watson@maths.uwa.oz.au (David Watson)
  3. Newsgroups: comp.graphics
  4. Subject: Re: Point inside a triangle
  5. Message-ID: <1eeln8INN79e@uniwa.uwa.edu.au>
  6. Date: 19 Nov 92 00:04:56 GMT
  7. References: <1992Nov16.115211.23169@sophia.smith.edu> <1e9c3cINN4hi@uniwa.uwa.edu.au> <1e9k0cINNc0q@uniwa.uwa.edu.au> <1992Nov17.033031.1896@sophia.smith.edu>
  8. Organization: The University of Western Australia
  9. Lines: 16
  10. NNTP-Posting-Host: madvax.maths.uwa.oz.au
  11.  
  12. orourke@sophia.smith.edu (Joseph O'Rourke) writes:
  13.  
  14. >In article <1e9k0cINNc0q@uniwa.uwa.edu.au> watson@maths.uwa.oz.au (David Watson) writes:
  15.  
  16. >>and if b0 == 0 => (x1 == x2 && x1 == x3 && y1 == y2 && y1 == y3)
  17.  
  18. >I think you meant to say if b0 == 0, then the three triangle vertices
  19. >are collinear: the above implication is too strong.
  20.  
  21. Yes, of course, when the three points are colinear the area is zero
  22. also.
  23. --
  24. Dave Watson                          Internet: watson@maths.uwa.edu.au
  25. Department of Mathematics            
  26. The University of Western Australia               Tel: (61 9) 380 3359
  27. Nedlands, WA 6009  Australia.                     FAX: (61 9) 380 1028
  28.