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Article #101

repetitive render redraw ...

#101
From: David Rossiter
Date: Tue, 25 Aug 1992 16:35
30 lines
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I can't stand it any more.... my 'render' module is obsessed with redrawing.
Can anyone help me?

Here's an example. If I have the render window at the usual expanded
size, say, 20% of the screen, and then I hit the maximise button in
the top right hand corner, I get the following:

- window expands to cover entire screen (as usual)
- in top left hand corner of window, at the same width and length as
the render window was BEFORE expanding, I get TWO complete redraws.
- THEN render redraws at the proper size.

By 'redraw' I don't mean a nice quick bit dump of the previous
screen area contents, I mean a complete geom to render
transformation. With small data sets, I wouldn't care, but now that 
I'm onto several lattice plains represented in a 3D structure, with
around a minute rendering each time, I'm getting a little tired... 

Much the same happens if I press the right mouse button for the render
menu. Render doesn't seem to have the intelligence to grab the
screen RAM before putting up the menu, and then transferring it back when
the menu pops-down. No, it has to do a complete redraw!

Surely this activity is completely unnecessary? Is there ANY way to 
stop this over-eagerness on the part of render? 

Please help! I'm thinking of start a self-help group called
'renderers anonymous'.

Dave
Technical Details
Message-ID: <1992Aug25.163505.11014@ohm.york.ac.uk>
Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!uknet!yorkohm!dpr

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Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!uknet!yorkohm!dpr
From: dpr@ohm.york.ac.uk (David Rossiter)
Newsgroups: comp.graphics.explorer
Subject: repetitive render redraw ...
Keywords: render sgi explorer redraw
Message-ID: <1992Aug25.163505.11014@ohm.york.ac.uk>
Date: 25 Aug 92 16:35:05 GMT
Organization: Electronics Department, University of York, UK
Lines: 30