Rod in Rigidbody

[Evgenius]

Hi Evgenius,

We're still trying to reproduce this. We've spent three days trying multiple setups including the one you described (or at least the way we understood it), all to no avail. The behavior we get is the intended one in all cases. I'm attaching a video of our replica of your setup, to see if you can spot any difference with yours:



Thinking about this, maybe you don't actually want the two-way coupling between the rigid body and the rod that pin constraints are designed for, and that's what you're perceiving as an undesired effect?. Since you're using pin constraints, the rod affects the movement of the rigidbody. So depending on the mass of the rod in relation to the cube and where it is positioned, it will affect the cube as if it was part of it. Using fixed particles would yield one-way coupling instead (that is, the cube would move around and the rod would just follow it, disregarding any interplay of forces between both).

I don't know where the problem was, but I got rid of it by reinitializing rod and using handles instead of pin constraints. Thank you, anyway