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From: jccf@ihlpg.UUCP
Newsgroups: comp.sys.mac
Subject: How to plot a single pixel ?
Message-ID: <2779@ihlpg.UUCP>
Date: Mon, 26-Jan-87 04:28:51 EST
Article-I.D.: ihlpg.2779
Posted: Mon Jan 26 04:28:51 1987
Date-Received: Tue, 27-Jan-87 02:58:03 EST
Distribution: net
Organization: AT&T Bell Labs, Naperville, IL
Lines: 28

*** REPLACE THIS LINE WITH YOUR FRUSTRATION ***

At the moment I am writing an application for plotting complex functions on
the mac screen. (Mandelbrot functions, 320x320 pixels, language is Megamax C).
Two problems I ran in at the moment;

1) How to plot a single pixel. I couldn't find a routine in IM like 
      plotpixel(h,v);
   and the current sollution
      moveto(h,v);
      lineto(h,v);
   ( pensize = 1,1 ) is too timeconsuming.

2) How to save the bit image in a clean fast way, since a rect (in which I am 
   drawing) only consist of 4 integers specifying the boundaries of the 
   rectangle.
   Also related to this problem, how do I update the window or rect after 
   another window (e.g. a DA) has been writen over the figure, and then
   this frontmost window is closed, so the figure has to reapear again.
   I have seen there's a routine teupdate(), but is the also something like
   grafupdate() or rectupdate().


e-mail or post any help,
Thanks in advance.

Piter Jonker, Hilversum, Holland

ihnp4!ihlpg!hvlpa!pjonker