This time it works. Thank you.
The results are:
The distance between skel_ShoulderL and skel_ArmLU is 0.144409524884.
The distance between skel__ArmLU and skel_ArmLL is 0.159618362784.
The distance between skel__ArmLL and skel_HandL is 0.00597032904628.
So I guess the length of upper arm is 0.14, and the lower arm is 0.15. Right?
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