I don’t think that would work. I tried that. the problem is, when you rotate the parent (cable) , it rotates the child (sign).
With a cable suspended object, what happens is; the base of the cable swivels, which causes the cable to rotate from the pivot point on the ceiling. This causes the sign to actually move (on two axis- up and over), not rotate.
See, the sign it’s self doesn’t rotate. The position of the sign varies based on the attached cable on the sign, based on the pivot point of the cable.
Also, if I parent one cable to another cable, the child cable is no longer pivoting from it’s anchor (the ceiling).
I’ve found tracking to be a VERY EASY solution to my issue. I had to add a tiny blue dot on the end of my cable, and pre-compose my animated cable layer; but it’s working pretty well so far.
What I would like to know is, lets say there is complex key framing of cable-01. How do I tell cable-02 to do the same motion without key frames?
How can I write an expression that says: When cable-01 rotates 20*, cable-02 rotates 20*?