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From: cht@athena.mit.edu (Chester Liu)
Newsgroups: comp.sys.mac.programmer
Subject: Drawing rectangles FAST!
Keywords: draw rectangles
Message-ID: <1990Jun13.154424.5357@athena.mit.edu>
Date: 13 Jun 90 15:44:24 GMT
Sender: news@athena.mit.edu (News system)
Distribution: usa
Organization: Massachusetts Institute of Technology
Lines: 22

Hi,
	I wrote a program in Think C 4.0 that is similar to
the cellular automata game called "Life".  I need to update
a grid comprised of different colored squares really fast
to simulate animation.

Right now, I call RGBForeColor(color);
and PaintRect(&dstRect); for every single square in the
grid.  It's painfully slow (I have a Mac IIcx) considering
how fast other "life"-like programs zip through their
animation sequences.
Can anyone suggest a routine that will read from a 2-D array
and paint squares really fast?

I fill the screen with a 70x50 grid with 3 possible colors.
Right now it takes about 2 seconds to do so.

Thanks!
Chester
cht@athena.mit.edu
or
cht@eddie.mit.edu