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Internet Message Format  |  1992-07-27  |  927 b 
  1. Path: sparky!uunet!munnari.oz.au!comp.vuw.ac.nz!canterbury.ac.nz!clas005
  2. From: clas005@csc.canterbury.ac.nz
  3. Newsgroups: comp.sys.mac.hypercard
  4. Subject: Re: identifying black pixels?
  5. Message-ID: <1992Jul28.114714.6083@csc.canterbury.ac.nz>
  6. Date: 28 Jul 92 11:47:14 +1200
  7. References: <oeR3hvy00WBN43zkoA@andrew.cmu.edu>
  8. Organization: University of Canterbury, Christchurch, New Zealand
  9. Lines: 16
  10.  
  11. In article <oeR3hvy00WBN43zkoA@andrew.cmu.edu>, "Charles A. Hill"
  12.  <ch2i+@andrew.cmu.edu> writes:
  13.  
  14. > Is there a way to tell hypercard, "If the pixel at clickPoint is black,
  15. > move over one pixel?"
  16.  
  17. Yes, a number of XCMDs let you check a particular pixel.
  18.  
  19. > 
  20. > *Of course, if HC had irregular shaped buttons, this wouldn't be a
  21. > problem.  (Hint for the next update.):-)
  22.  
  23. You can also have this; there are XCMDs for polygonal buttons.
  24.  
  25. This question would have been answered by using my 
  26. Guide-To-XCMDs, available on sumex. -- matt
  27.