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Date: Thu, 2 Mar 89 21:43:27 EST
Message-Id: <8903030243.AA11341@OGLALA.MIT.EDU>
From: Bill Cattey <wdc@ATHENA.MIT.EDU>
Sender: wdc@ATHENA.MIT.EDU
To: bgardner@ATHENA.MIT.EDU
Subject: Do you have...

_Fundamentals of Interactive Graphics_ by J.D. Foley and A. Van Dam?

There's a line drawing algorithm there I need to look up.
The implementation I'm debugging tries to divide by zero.
I want to know what the algorithm does when dx==0.

  From the 'desk' of     _   /|
  Bill (the) CATTey...   \'o.O'
                         ~(___)~       THSHVPPPOOO!
                            U  	   	   ACH!