Path: utzoo!attcan!uunet!microsoft!t-stephp
From: t-stephp@microsoft.UUCP (Stephen Poole)
Newsgroups: comp.sys.mac.programmer
Subject: Flickering cursor
Message-ID: <5522@microsoft.UUCP>
Date: 18 Apr 89 02:42:20 GMT
Reply-To: t-stephp@microsoft.UUCP (Stephen Poole)
Organization: Microsoft Corp., Redmond WA
Lines: 24

I'm working on an LSC program that is very calculation intensive.  My
event loop checks for the usual events and after processing any makes
a call to my calculation routine.  This routine takes a small fraction
of a second (typically about .1 - .2, I'd guess), during which time it
calculates the path of a particle and whether or not it is going to 
result in anything visual.  If so then I plot a short line or a single
point.  

The problem is that my mouse cursor flickers horribly.  Up until the 
point where I open a new window and begin these calculations it is
perfectly steady, but this calculation routine is causing it to go
nuts.  It seems to me that the problem is just because I'm not calling
WaitNextEvent frequently enough, but it will take some serious 
rewriting to check for events between every calculation instead of
between groups of calculations.

Am I correctly assessing the problem?  Is there some general guideline
about how frequently GetNextEvent must be called?  Thanks for any help.
 
-- 
-- Stephen D. Poole -- t-stephp@microsoft.UUCP -- Mac II Fanatic --
--                                                               --
-- I'm just an Oregon Tech Software Engineering co-op at  Micro- --
-- soft.  Believe me, nobody here pays attention to my opinions! --