Path: utzoo!attcan!uunet!mcvax!ukc!cs.tcd.ie!tcdmath!pcraig
From: pcraig@maths.tcd.ie (Peter Craig)
Newsgroups: comp.sys.mac.programmer
Subject: Color animation on the Mac II
Keywords: Palette, Color, Animation
Message-ID: <42@maths.tcd.ie>
Date: 1 Sep 88 14:13:16 GMT
Reply-To: pcraig@maths.tcd.ie (Peter Craig)
Organization: Maths Dept., Trinity College, Dublin
Lines: 32


Anyone out there know a lot about this ?  I have been trying together
with others to understand the animation procedures. IM V is a far from
complete explanation. However I usually expect to be able to figure
the rest out by trying things. Maybe there are some tech. notes that put
a bit of flesh on the skeletal bones. Does anyone have any ?

Here's the problem: I have a program which displays images (satellite derived)
in multiple windows. Because I'm well-behaved and read my manuals I want to
be civilised in what I do to the color environment. Hence I use the Palette
Manager to do the color setups. What I want to be able to do is some animation
in one window at a time (the front window). The idea is to be able to do
things like thresholding (all sufficiently dark colors map to black) quickly
and interactively. Therefore I need a palette of animating colors. So, I 
allocate a palette containing the colors I want with the usage field set
to animation, attach it to the window and activate it. Then I redraw
the image into the window using copybits (I'd like to avoid doing that but
I figure its necessary to do it to make sure the animating colors are actually
used, right ?). Now I ought to be able to animate that palette and see changes
in the window. At least thats how I read the manual. But, NOTHING happens.

HELP ME PLEASE, I'M GOING EVEN MORE INSANE THAN USUAL !!
(Are you listening, Apple ?)

Thanks in advance, everybody.  Peter.


Peter Craig, Dept. of Statistics, Trinity College Dublin, Ireland
pcraig@maths.tcd.ie
353-1-772941 (x1203 or x2048)

	*** No disclaimer - I get paid to have my own ideas ***