Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!samsung!usc!apple!lsr
From: lsr@Apple.COM (Larry Rosenstein)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Marquee Help?
Message-ID: <6059@internal.Apple.COM>
Date: 8 Jan 90 21:01:37 GMT
References: <18304@dartvax.Dartmouth.EDU> <2495@odin.SGI.COM>
Organization: Apple Computer, Inc.
Lines: 23

>	PenMode(patXor);	/* I'm not sure this is either the correct

If you are doing this in a bitmap, then you should use patCopy.  patXOR
might look better in a structured graphics program, where there is always a
lot of white space.  (If you use patCopy then to erase the marquee you have
to redraw the contents of the rectangle.0

>		PenPat(patterns[patNum++]);
>		patNum &= 3;
>		FrameRect(pRect);		/* Draw a rectangle */
>		while (TickCount() - t < 4)	/* Wait a bit */

Another way to do this is to choose the pattern based on the value of
TickCount % 4 (or TickCount % 8 if you use 8 patterns).  The advantage is
that the ants will move at the same speed regardless of the size of the
rectangle.  The disadvantage is that you may get jerky motion if your loop
can't keep up.

-- 
		 Larry Rosenstein,  Object Specialist
 Apple Computer, Inc.  20525 Mariani Ave, MS 46-B  Cupertino, CA 95014
	    AppleLink:Rosenstein1    domain:lsr@Apple.COM
		UUCP:{sun,voder,nsc,decwrl}!apple!lsr