Increase flip vel on static collider

[Hans Peter]

Hey, 

do you have a tip on how to increase collisionvelocities of flip when colliding with something static? I tried putting "collisionvelscale" onto particles, increase the value around collision areas and put it back onto the field. Didnt work. 

[Atom]

Try adding point normals to your static geometry, then assign those normals to v@v.

v@v = @N;

This will provide something other than zero for the solver to multiply against.

ap_flip_static_collider_velocity.hiplc

Edited March 5, 2021 by Atom

[Hans Peter]

I can add external forces, sure. But do you know a way to work directly with the collisionvel or collisionvelscale? I'm wondering why its not working. I created a particle group near the collision area and passed the collisionvel or velscale onto those particles, increased th values and noised them up a bit and transferred the stuff back to the field. 

[Atom]

collisionvelscale is the parameter on the solver. Don't pass that, pass v@v on the surface of the collision object. Without the v@v attribute present, the collisionvelscale seems to do nothing. Once you add the attribute to the collision points, it begins to work.

The first GIF I set collisionvelscale to 10.0 This one I set it to 0.1.

Edited March 5, 2021 by Atom