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Very simple question: Is it possible to process a vbo through different shaders? If so, how? What I want is sth like this:
reflectionShader.bind(); //starts shader
reflectionShader.load(some_values); //loads uniform vars into shader
process(vbo); //"renders" vbo using bound shader
reflectionShader.unbind(); //stops shader
refractionShader.bind();
refractionShader.load(some_other_values);
process(vbo);
refractionShader.unbind();
render(vbo); //output to screen
The way to do this is with a FBO (Frame Buffer Object).
You can render each pass to a FBO and use it as a texture input in the next stage, any kind of deferred shading and post processing is reliant upon this functionality.
