Hi,
I want to render to a floating point buffer, and I set things up like this:
tex->setInternalFormat( GL_LUMINANCE16F_ARB );
tex->setSourceFormat( GL_RED );
tex->setSourceType( GL_FLOAT );
camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
camera->attach( osg::Camera::BufferComponent( osg::Camera::COLOR_BUFFER0 ), tex
);
camera->setDrawBuffer( GL_COLOR_ATTACHMENT0_EXT );
My fragment-shader that write to the surface output the value this way:
gl_FragData[0].r = 1.0;
Another fragment-shader reads the surface this way:
value = texture2DRect( id, gl_FragCoord.xy ).r;
I get the following output when I try to run my app:
"Warning: RenderStage::runCameraSetUp(state&) Pbuffer does not support multiple
color outputs."
My app runs, but nothing is written to the texture.
Is it possible to set up a surface that holds one channel (GL_RED) which is an
unsigned int of 32 bit resolution? I'd rather use that than a float :-)
Viggo
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