I'm preparing a new project and when surveying the options I was wondering if such a thing as field lookup is possible on the GPU.
I was imagining some kind of agents based model where agents can be gently pushed by a field that they are helping to shape. For this to work on the GPU I'd need some way that the output of a fragment shader can be input to a vertex shader, ideally in the form of texture values at vertex locations.
Am I imagining a holy grail here ? I suppose this is not possible because I'd imagine it would have been all over the place ?