[osg-users] how to get an unclamped float color buffer?
john.donovan at embryonicstudios.com
Thu Oct 25 08:43:48 PDT 2007
Ralph Kern wrote:
> I now managed to get true float values out of the render buffer by
>>> image = new osg::Image;
>>> image->allocateImage(width, height, 1, GL_RGB, GL_FLOAT);
>>> viewer->getCamera()->attach(osg::Camera::COLOR_BUFFER, image.get());
> But the values are still clamped to 1.0. Any idea to get around that?
> regards Ralph
A fragment shader is what you need I think. Make sure you write to gl_FragData
rather than gl_FragColor, otherwise it'll still be clamped.
I'm a bit busy at the moment, so I can't help you further, but I'm sure others
will be generous with their time :)
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