Help Knot in suturing simulator

[josemendez]

Every manipulator has a rigidbody, set to kinematic while grabbed by the user.

Kinematic rigidbodies have infinite mass. In practice this means they will ignore any forces exerted upon them, and they will apply infinite force to any object interacting with them.

In the case of a rope attached to a kinematic rigidbody, this means the rope won't be able to prevent rigidbody movement once it's tensed up. Instead, the rigidbody will pull from it with infinite force. This will not only undo any knots in the rope, but also allow it to stretch indefinitely.

If you want the rope to be able to act upon the manipulator, you need to keep the manipulator non-kinematic and move it around using forces/accelerations.