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For example, in a 2d world in the xy plane, I have a quad that represents the line AB. I would like to be able to rotate that quad about the z-axis at pivot point A or B so that it always points at position X (like a clock hand but the rotation pivots around a user specified end). I have a solution for this but it varies depending on which end is selected to be the pivot. Is there a more general solution? Many thanks for any help.
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I've looked at that but it doesn't work for the general solution since the direction of the angle must be calculated and to do that I think a special case is required for each end.
Jul 21 '11 at 04:08 PM
mat
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