Currently I can add the same pressure to multiple spheres, what has been bothering me lately is how to apply different pressure values in the simulation (e.g. 5 for the red sphere, 2 for other colors), or set different stretch values for the cloth, I Thinking they're similar in principle.

I've tried looking up information, but haven't been able to find an introduction to this. Do you have any good solution? Thank you for your help!

You could activate Use VEXpression. Add a custom id to identify each sphere, and supply an alternate value to restscale over time.

Enivob
Enivob

Thanks for your help, I'll do some concrete tests next, thanks a lot!

Enivob
You could activate Use VEXpression. Add a custom id to identify each sphere, and supply an alternate value to restscale over time.

if(i@my_id==0){restscale = fit(@Frame,1,48,1,10);}
if(i@my_id==1){restscale = fit(@Frame,1,56,1,4);}
if(i@my_id==2){restscale = fit(@Frame,1,60,1,30);}
if(i@my_id==3){restscale = fit(@Frame,1,24,1,9);}
if(i@my_id==4){restscale = fit(@Frame,1,72,1,17);}

According to the idea you provided, I first defined the id attribute for each sphere.

And then set different restscales according to the id attribute through VEXpression in slover.

But the result does not seem to identify "i@my_id>4", may I ask why?


Looking forward to your reply

It's probably because the "i@my_id" needs to be a prim attribute not point. (you can promote it after your copy to points)
Vellum constraint properties runs over prims, so it cant find your id attribute

AslakKS
It's probably because the "i@my_id" needs to be a prim attribute not point. (you can promote it after your copy to points)
Vellum constraint properties runs over prims, so it cant find your id attribute

Thank you for your reply. I tried to add "attribute promote", but it still doesn't work. Is there something wrong with my "attribute promote" setting?

Hi,
I seem to have the same issue. I need to setup a customized per-point restlength to mimic a growth effect, and I tried using VEX expression. It doesn't work. Then I simplified to just setting a constant restlength. Still doesn't seem to affect anything.
Could someone please take a look at this? I am on 18.5.351.

Thanks a lot!