Need help using DzViewAction (I think).

I'm writing a Space Mouse driver for OS X, but I'm having difficulty accumulating movement when switching between different actions and between the 3D mouse and the regular mouse. the doMove method claims to take dX and dY, but clearly takes an absolute value. Further, if I accumulate x and y in variables, I don't know where to start them as they are not tied to the actual location of the camera so far as I can tell. Lastly, I think this is tied up with the undo manager somehow, but I'm not sure in what way or what to do with it.

Has anybody used this? Am I even on the right track?


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