nParticles self collide PP

[Aikiman]

My initial impression on this is "no", I could be wrong but I believe the self collision is object based not pp. Just another short coming of the wonderful Nucleus system.

[Keithtron]

I've been trying to figure out if there's a way to control the self collide attributes per particle as well. My situation is a bit different, as I'm trying to control the selfCollideWidth PP, based on the geo instance size. Haven't figured out if there's a way just yet.

But in your case, you could always add attributes to freeze the particle in place, despite self collisions. You could create a "frozen" PP attr, and a PP vector for its position. In your Runtime After Dynamics expression, just write a few lines that check if the given particle is frozen, and if so, kill its velocity and update its position with the position saved in the PP attribute.

I'm not sure if this would do odd things with the other particles that are colliding with it, and I haven't tested it, but it's the first potential solution that comes to mind.

[Keithtron]

Does anyone know if a particle's collision width is based on the particle's radius? And whether or not the collisionWidthScale/selfCollisionWidthScale act relative to that radius? If so, then that would really help customize collision behavior on a PP basis, at least to some degree. I don't know how much that would help with the original poster's problem, but it would help with mine!

Sorry, I didn't mean to hijack your thread or anything. ;-)

[Duncan]

With nParticles the radius (and radiusPP) affect the particle collision radius. The two collision scale values multiply this radiusPP for collisions. If two particles have radiusPP = zero then they will not collide with each other( but will with surfaces or particles with thickness ).

Duncan

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