I have a working trebuchet arm and counterweight. There are short lengths of chain on the end of the arm; one is fixed to the arm by a ring and the other is hanging on a pin stuck in the end of the arm. Two ropes are tied to the last links of the chains. The ropes fasten to a sling pouch. The arm and chains are, of course, rigid body objects. They seem to simulate/animate properly. The question is, how do I (1) attach the rope loops to the chains (rigid body to soft body), and (2) attach the sling to the ropes (soft body to cloth)? And all in a manner that makes the whole contraption simulate correctly?
I have tried pinning one of the vertices of the rope loop to the last chain link but all that does is pull that vertex with the link as the rest of the rope falls.