How do I make the origin of jit.gl.mesh equal to the center of the object? The origin seems to be offset by default. I've modifed some of the example patches to use the luma from a movie as a displacement map. I did this by enabling matrix output on a jit.gl.gridshape and then inputing it into jit.gl.mesh. The result is a rutt etra style distortion on a 3d object. I need the sphere that is created to have a center origin, so I can accurately rotate a camera around the object. Please help.