Re: Textures on Performer 1.2

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Angus Dorbie (dorbie++at++bitch.reading.sgi.com)
Thu, 28 Mar 1996 09:45:49 +0100

Sounds like ou have texturing on when you are drawing your non textured data,
this means that the last texture used will remain bound and the last texture
coordinate sent down the pipe will be used. The classic symptom of this is
untextured objects suddenly becoming darker because they are being modulated
by the colour of a single point on a texture.

Do you find that the colour changes depending on your frustum content?
This is the clincher.

Likely problems are that your turning on texturing and overriding it to
remain on, or there's some dodgy state information in your scene graph
perhaps even introduced by the loader your using.

This type of problem is one of the reasons the concept of global state
information was introduced in Performer 2.0.

Rgds,
Angus.

On Mar 27, 7:40pm, Sergio Papiani wrote:
> Subject: Textures on Performer 1.2
> Hi,
>
> I've a problem with my Perfly environment when I turn textures on:
> I have built a lot of colored polygons and I want to attach
> a texture on some of them. It works very well, but when I turn on the texture
> (pushing the Texture button on the GUI) all the non textured polygons become
> dark.
> Could someone explain me why this happens?
>
> Thanks in advance
>
> Sergio Papiani
> Universita' di Firenze (Florence, Italy)
> papiani++at++aguirre.ing.unifi.it
>
>
>-- End of excerpt from Sergio Papiani

-- 
Angus Dorbie,
The Reality Centre,
Silicon Graphics Ltd, UK
dorbie++at++reading.sgi.com

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