Path: utzoo!attcan!uunet!know!zaphod.mps.ohio-state.edu!wuarchive!emory!gatech!purdue!mentor.cc.purdue.edu!j.cc.purdue.edu!brazil.psych.purdue.edu!zhou
From: zhou@brazil.psych.purdue.edu (Albert Zhou)
Newsgroups: comp.lang.pascal
Subject: Re: Text windows
Message-ID: <11473@j.cc.purdue.edu>
Date: 13 Nov 90 23:04:00 GMT
References: <7187@hub.ucsb.edu>
Sender: news@j.cc.purdue.edu
Reply-To: zhou@brazil.psych.purdue.edu (Albert Zhou)
Distribution: comp
Organization: Purdue University
Lines: 11

I don't really get it. If your window information is stored in variables,
it is really simple.  Suppose two windows are defined as (xa1,ya1,xa2,ya2)
and (xb1,yb1,xb2,yb2), if (([xa1..xa2]*[xb1..xb2])=[]) or   
([ya1..ya2]*[yb1..yb2]=[]) then these two windows are not overlapping. I don't
know it can be called optimized, but I couldn't think of anything simpler.

I don't undertand the author's writing after "My problem is.." until the end
of the article.


([ya1..ya2]*[yb1..yb2]