I attached my hip file .

I add an 'attribute create' node , set attr name to 'active' and set keyframes on the value.

My first setup is having no constraint connection from rbd material fracture and rbd bullet solver. Play the sim and I got the correct result.



But now I need to connect the constraint output from rbd mat fracture to rbd bullet solver. The problem is once I connect it, it gives me the unexpected result. Only the left box works, while no impact on the right box.



make active does not work for partial assignment if I connect the constraint.

So far I inspect this problem happen because in the 'attr create' node (make_active), I assign it to the whole prim on the left box , while for the right box, I only assign partially to some primitives.




Anyone can explain this behavior ?

can't check out the file, but generally if any of the pieces within glue constrained structure is not active, then te whole glued structure is not active as it's held by that piece