On Fri, 22 Mar 2002, José Fonseca wrote:

> This is a bug which still hasn't disappeared with the latest updates. In 
> the game the penguin flashes randomly as it slides downhill. He still 
> drawn but just its bright, as a phantom. I've been trying to hunt this 
> down but I still didn't had much success so far. Could someone tell me if 
> this just happens with my card (although I found it strange since the 
> memory shouldn't be a issue since the penguin seems to be drawn in solid 
> color) or not?

Yes, I have this problem too, but haven't tracked it down yet.  I get a 
similar flicker in gltron with alpha blending, but without the 
phantom/transparent effect.
 
> Another strange thing that happens sometimes is when I first run a OpenGL 
> app the double buffering doesn't work properly, the image is not refreshed 
> properly and things are drawn over the previous frame. When I run again 
> this doesn't happen anymore. This seems that some state vars still aren't 
> being updated properly.

I haven't seen this I don't think, but I have seen problems with
single-buffering.  Bits of old textures/framebuffer appear when running
texenv without '-db', for example.  I've seen a new problem recently too,
in an app I'm working on.  I have a rotating surface.  When alpha blending
is on, if I toggle texturing from enabled to disabled, sometimes the 
surface disappears, but only when it is on the far half of the rotation 
cycle.

> José Fonseca
> 
> 
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-- 
Leif Delgass 
http://www.retinalburn.net


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