Inside the Vellum Solver, how can I retrieve the stretch value?

[Masoud]

Hi guys,

In a Vellum sim, and inside the Vellum-Solver, how can retrieve values like the stretch amount (as an attribute), to drive something based on it (using in POP, or Geometry Wrangle)?

I would like, for say, to stop the "Attach to Geometry", if a Vellum string have been stretched more that a value. I don't want to use breaking threshold workflow...

 

Thanks for helping.

Vellum_Test_01.hip

[Masoud]

Any ideas?

[Fakit]

Hello Masoud, 

Just a guess, did you try to play with "Vellum Constraints Properties" in the vellum solver ?
You can output a group from your constraint node

 

Then, apply constraints properties for this group

[Masoud]

Hi Fakit, it doesn't work.

When you add a "Vellum Post-Process", it creates all attributes that I need, but I need to create the same attributes inside the solver to drive the things...

Edited May 8, 2023 by Masoud

[Atom]

It looks like a custom function inside the Vellum Object. Unlock those HDAs and poke around.

You could try taking the code and placing it inside a GeometryWrangle running over primitives bound to the constraint geometry.

[Masoud]

Thank you Atom, good tips, and now it works fine.

(I hope they add a simpler option for this, in the future...)