Ziploc Baggie Of Powder (cloth fails?)

[Atom]

Hi All,

I am trying to model a ziploc baggie of powder in Houdini. I thought it would be fairly simple to have cloth wrap around a collision geometry lump of powder but I am getting no collision and very slow performance.

As you can see in the image the blue collision object seems to be ignored by the cloth. I have tried volume based collision ON and OFF. Cloth performs the same. I want the cloth to wrap around the collision object while the stitching holds the edge of the cloth based baggie together.

Does anyone know how what setting I need to adjust to make collision work in cloth?

ap_ic_baggie_of_powder.hiplc

[Sepu]

Hey Atom,

Here you go,  the main thing was that you had turn off "collide with objects in other solver" that's why the geo was not colliding, I also change some small bits to make it a bit faster.

 

 

ap_ic_baggie_of_powder_v2.hiplc.hipnc

[Atom]

Ah, thanks. I was able to copy your changes into my scene. Collision is now working.

Do you know of a way to make more wrinkles show up in a cloth sim?

 

[Sepu]

You can play with the stiffness and the weak bend and see what you get. 

Also another idea is painting the some attributes or doing some noises in Vops and bind export those attr. There is a list of attributes on the help that you can play with, they will be multipliers.

Also you could do it with a displacement and blendshape and then sim, and use the target stiffness and damping.

Just some ideas and playing with some settings.

 

Edited December 21, 2016 by Sepu