You might enjoy http://www.iquilezles.org/live/ http://www.iquilezles.org/live/ where he live codes some ray-marching using some kind of opengl editor. It's not

You might enjoy http://www.iquilezles.org/live/ http://www.iquilezles.org/live/ where he live codes some ray-marching using some kind of opengl editor. It's not quite what you're talking about, since it's just running the opengl code, but you could imagine it going through some kind of compiler/visualizer pipeline like you're thinking about.