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I've been researching shaders beyond vertex/fragment in Processing 2.1.
Now I'm trying to do the same for tessellation shaders, see my progress so far: TessellationShader
But it's not working and the error message is very undescriptive: "OpenGL error 1282 at top endDraw(): invalid operation"
Does anybody have good suggestions or better yet fixes to get these shaders to work as well?