Path: utzoo!utgpu!news-server.csri.toronto.edu!neat.cs.toronto.edu!mgreen
Newsgroups: comp.graphics
From: mgreen@cs.toronto.edu (Marc Green)
Subject: IRIS ANIMATION QUESTIONS
Message-ID: <90Jul31.082130edt.7234@neat.cs.toronto.edu>
Organization: Department of Computer Science, University of Toronto
Date: 31 Jul 90 12:21:56 GMT
Lines: 24

I just bought an IRIS but have been unable to perform animation the
way I'd like. I'm hoping that someone may have had similar experience
and offer some suggestions.

I want to create animation by predrawing a series of frames and
panning/scrolling to them. (The pictures have to be drawn pixel by
pixel and cannot be redrawn in one or two sweeps so double buffering
doesn't work. Even so I need at least 4 frames.) In my old system, I
had hardware zoom and pan. I could do animation by:

1) zooming up to create off screen memory. The lower resolution was
OK. I can get by with 256 X 256.

2) then draw 4-8 frames off screen

3) and then make a movie by cycling them through the display buffer
for viewing.

Can I simulate this on the IRIS?

I can work in color map mode and reduced resolution is OK. 

Marc Green
Trent University