Xref: utzoo comp.graphics:1843 comp.sys.ibm.pc:12605
Path: utzoo!mnetor!uunet!wucs1!wucs2!posdamer
From: posdamer@wucs2.UUCP (Jeff Posdamer)
Newsgroups: comp.graphics,comp.sys.ibm.pc
Subject: Re: COMPLICATED PROBLEM; ONLY INTELLIGENT PEOPLE SHOULD READ
Message-ID: <792@wucs2.UUCP>
Date: 29 Feb 88 17:23:39 GMT
References: <971@ut-emx.UUCP> <5569@cit-vax.Caltech.Edu> <608@mcrware.UUCP>
Organization: Washington University, St. Louis
Lines: 42
Summary: Laziness in Computer Graphics

In article <608@mcrware.UUCP>, jejones@mcrware.UUCP (James Jones) writes:
> I've seen several responses to the query that state a method based on
> the Jordan theorem--since the original poster didn't give details of the
> figure, it probably merits pointing out the hypothesis of said theorem
> requires that the curve in question be a simple closed curve, i.e. it
> can't cross itself. 
> 
> (If you allow crossings, then consider a figure eight.  There are a
> whole lot of points people would normally consider to be on the
> original poster said he was starting with end at a crossover point.)
> 

There is no reason for either positive or negative flames her, HOWEVER:

There exists a list of questions, each of which is answered in every
introductory graphics text and/or course and/or tutorial. It seems that
very often, it is more convenient to bang out a net request than do some
homework. The problem is not in taking this approach. The real problem is
that those who reply are frequently incorrect in their responses. As with
newspaper or TV reports that are incorrect, the damage lives on long after
the netlanders or even the replier have corrected the posting. A simple 
request:
Do NOT post items of the "it seems to me...", or "An obvious solution..."
variety. Almost all of these problems have well understood, tested, valid
solutions. Look in:

Foley and Van Dam, Fundamentals of Interactive Computer Graphics

Newman and Sproull, Principals of Interactive Computer Graphics

Preparata and Shamos, Computational Geometry

and the list goes on.

	Maybe that was a flame; if so, flame off
			Jeff Posdamer

-- 
Jeff Posdamershington University, St. Louis, MO, (314) 889-6147
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