Help How do i add(use) or remove constraints arbitrarily on each particle in runtime

[ab8228657]

Unity already implements springs:
https://docs.unity3d.com/Manual/class-SpringJoint.html

thanks very much。
I think it's exactly the same as what you said when the character swings, but when I climb, I see that the rope is not completely connected to the foot. If the upper part of the hand is a string and the lower part is an obi rope, how can the lower part of the rope in the video be made to wave and sway with the foot