Thanks to the 'screentoworld' message you can get openGL coordinates from a jit.window. But if a drawing (i.e. from jit.gl.sketch) is sent to jit.gl.node, then sent to jit.gl.cornerpin, the drawing's coordinates are still OK considering jit.gl.render, but wrong considering jit.gl.sketch.
Is it possible to get the right coordinates for jit.gl.sketch ?
A capture and the patch to explain.