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Re: rotating an object around the center of a view



Your solution seems workable but very strange to me.

Why rotate the "dial" instead of rotating the coordinate system in which the dial is drawn ?
Why invert and then re-invert the simple translation matrix ? Do you have some objection to the following ?


translateXBy: ox yBy: oy
rotateByDegrees: (timeInSeconds * -6.0f)
translateXBy: -ox yBy: -oy

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