[osg-users] Disable light in shaders?

[Jaime]

Hi,

I want to disable specific lights with OSG, and it affects models with shaders. How can I do it?

What I have now, it is not working. I apply shaders with:

osg::StateSet* stateset = new osg::StateSet;
[...load shader...]
stateset->setAttributeAndModes(programObject, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
m_pDrawable->setStateSet(stateset);

In execution, I wanto to disable some lights, and this change has to affect shader (in the shader I have two lights). But, when I disable light in OSG, it doesn't work. I have tested with and no succes:
ss->setMode(GL_LIGHTING, osg::StateAttribute::PROTECTED | osg::StateAttribute::OFF);
ss->setMode(GL_LIGHTING, osg::StateAttribute::PROTECTED | osg::StateAttribute::OFF);
model->GetNode()->getOrCreateStateSet()->setMode(GL_LIGHT1, osg::StateAttribute::OFF);

If I test with "normal" models (without shaders), it works. But the problem is with shaders. Do I have to turn off light in OpenGL?

Thank you!

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[Robert Osfield]

HI Jamie,

When using shaders it's the shader itself that controls the lighting
so the standard OpenGL lighting modes won't affect it.

If you want to toggle lighting in shaders you'll need to assign a
different shader or use a uniform that controls whether lighting is
applied or not.

Robert.

[Jaime]

robertosfield wrote:
> HI Jamie,
>
> When using shaders it's the shader itself that controls the lighting
> so the standard OpenGL lighting modes won't affect it.
>
> If you want to toggle lighting in shaders you'll need to assign a
> different shader or use a uniform that controls whether lighting is
> applied or not.
>
> Robert.
>

> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >
> _______________________________________________
> osg-users mailing list
>

> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
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Thank you very much Robert! It worked! :D
I am using uniforms.

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Read this topic online here:

http://forum.openscenegraph.org/viewtopic.php?p=59753#59753