Mystery rig with mystery bones

[Jeff Bellune]

Hi Dwayne,

Thank you for the session in the Discord hangout. You came up with a clever solution! By subdividing the MECH bones, I was able to keep the physical distance and angle of the original MECH bone from the Root bone, which is critical for the doors to rotate in the proper plane. But I was also able to turn the new segment of the original bone into a CTRL bone by making the Y-axis of the new bone parallel to the world space X-Y plane and recalculating the roll of the new bone to align its Z-axis with the world space +Z axis. Like so:

Now the Z-axis of the CTRL bone is aligned with the Y-axis of the ROOT bone, no matter how the armature is rotated in world space, which was the goal. 

[Jeff Bellune]

Ta-Daaa! The finished rig.

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