Help Obi Rod collision causing weird stretching behavior

[violinviolin19]

I wasn’t referring to the individual ObiRod component constraints (the ones shown in your screenshot), but the global constraint settings. Those are found in the ObiSolver component, under the “constraint settings” foldout as previously mentioned. These control constraints for all rods/ropes/actors involved in the simulation performed by the solver. See:
https://obi.virtualmethodstudio.com/manu...olver.html


The solver represents the inertial reference frame in which simulation is performed. In your case it’s clear you don’t want to be moving the entire reference frame, but the rod.

Is the rod attached to the handle at all? If it’s not, it won’t move together with it. See “attachments” in the manual:
https://obi.virtualmethodstudio.com/manu...ments.html

Also see the included sample scenes, most use attachments in various ways, those may be helpful.

Kind regards,

Thank you so much for the response! I enabled these parameters and used the particle attachment and now I'm experiencing much more realistic behavior without moving the solver. The one thing remaining is that the rod moves sort of like a whip currently and is very wobbly. I'm looking for a very rigid catheter that gently flexes against colliding objects. I've set all the bend and stretching constraints to 0 but I'm unsure what other settings are needed to increase stiffness.