Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!eecae!netnews.upenn.edu!linc.cis.upenn.edu!rubinoff
From: rubinoff@linc.cis.upenn.edu (Robert Rubinoff)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Stupid QuickDraw question
Message-ID: <8145@netnews.upenn.edu>
Date: 18 Feb 89 03:22:11 GMT
References: <71976CXT105@PSUVM>
Sender: news@netnews.upenn.edu
Reply-To: rubinoff@linc.cis.upenn.edu.UUCP (Robert Rubinoff)
Organization: University of Pennsylvania
Lines: 15

In article <71976CXT105@PSUVM> CXT105@PSUVM.BITNET (Christopher Tate) writes:
>What is the best way to plot a single point in a given GrafPort (window, screen
>or other)?
>A friend has told me the only way he knows of is to MoveTo the proper point,
>then Line(0,0) to draw it.  This strikes me as pretty strange; there should be
>a primitive for drawing a single point.

Since QuickDraw points fall inbetween pixels, I doubt very much whether you
want to draw just a point.  Presumably you want to draw just a single pixel;
the simplest way to do that is to either draw a 1x1 rectangle around it or a
1-pixel long 1-pixel wide line across it.  But since the pen must be at least
one pixel high and one pixel wide to draw, this really means drawing a 0x0
rectangle or a 0-length line.

   Robert