[Flashcoders] best way to perform collision detection on rigid objects?

[Anthony Pace]

For 2d I would assume a xor for the solid object created by a shape 
created by the displacement of object1 in the next frame and the object1 
in the current frame to detect if a collision occurs between it and 
object2? 

For 3d spherical subdivision mixed with 6 sided bitmap xor in the same 
respect?  Or would this be too expensive cycle wise?

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