I've made a rocking chair that I'm now trying to set up to rock. Its not as simple as just moving the chairs pivot point to the ground contact because when the chair is rotated about the pivot point the front and rear ends of the rocking bar penetrate the ground plane. Its like a wheel that both rotates and moves forwards/backwards keeping contact with the ground at the same time.

The actions that best describe what needs to occur is a rotation about the x axis with a simultaneous translation on the y axis with the chairs pivot point at ground contact. This is easy enough to do as an animation using the graph but is there a way that a single dial can be edited to make both adjustments (rotation and translation) happen at the same time?

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