Re: Part of the screen does not get redrawn ....

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Gan Wang (rock.csd.sgi.com!sgi.com!uunet.uu.net!ds9!wahoo!gan)
Fri, 19 Sep 1997 11:12:05 -0400

uunet!etcusa.com!dcibiceli wrote:
>
> Dear Performers,
> I am displaying a HUD (Heads Up Display). I have tied key
> combinations to test the pitch and roll movements. When I pitch up,
> some of the ladder ( roll angles drawn on the HUD ) gets printed on top of
> each other. It is as if a specific part of the screen ( horizontal band) does
> not get redrawn for specific pitch angles. Every thing drawn in that
> horizontal band of the screen does not get refreshed when a new frame is
> drawn. Thus numbers are printed on top of each other in that horizontal band.
> Any idea why that may happen... I am using the perfly source code with
> performer 2.1 .
>

Do you use esky? Esky doesn't clear below horizon. You have to "cover"
it up with your own terrain polygons which gets redrawn every frame
before the HUD is drawn. Just a wild guess without knowing what you
have in your scenes.

> Dogan Cibiceli
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-- 


Gan Wang


Cambridge Research Associates            Voice:  703-790-0505 ext.7210
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