Help Obi Rod collision causing weird stretching behavior

[josemendez]

Thanks, that's great! One last thing- I'm attempting to make a catheter that can bend at the tip via controller input (without an external force) and I'm struggling to get started with that. I have control points defining the top and bottom of the tip and I just want the particles there to bend into a candy cane shape and back without lengthening or affecting the rest of the catheter. Any tips?

Hi!

You should change the rest darboux vector of bend/twist constraints. It's a quaternion that determines the local rest shape of the rod.

Here's a thread about exactly this kind of thing:
https://obi.virtualmethodstudio.com/foru...-2905.html

and a video with an old implementation (code shown in the video might not compile as-is for newer versions):
https://www.youtube.com/watch?v=wMZC38INjG4

kind regards,