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mouse over object

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Hi! I am using my mouse to move the object around the space (glTranslate). I need the mouse pointer to be on the same spot of the object when I move it around. The problem is that the mouse pointer moves faster than the object. I've scaled down the mouse movement and the results are better, however I would like to ensure that the mouse pointer is always on the exactly same spot of the object. What calculations are needed?

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Your mouse movements are in screen space.

Your object's movements are done in world (camera) space.

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