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From: trotter@ENUXHA.EAS.ASU.EDU (Russell T. Trotter)
Newsgroups: comp.sys.mac.programmer
Subject: !Animation again....
Message-ID: <9102102029.AA14342@enuxha.eas.asu.edu>
Date: 10 Feb 91 20:29:56 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: trotter@enuxha.eas.asu.edu (Russell T. Trotter)
Organization: Arizona State Univ, Tempe AZ
Lines: 25


 I would like to start by thanking every one who replied
to my first post about animation.  

Several of the replies explained about syncing to vertical
retrace.  I tried this in one of my first attempts but
it slowed the action down of the animation to a crawl.

My VBLtask was quite simple...
	
	first I saved A5 , incremented a ctr variable ,restored
A5 and returned.  

my calling program had a segment like this..

ctr = 0;
while (ctr == 0);           

drawmystuff();               

and in the "background" my VBLtask would break m
out of the "infinite loop" after the retrace but like
I said this was horribly slower than just drawing 
without any syncing.  ???  Any comments about this
would be greatly appreciated.