Particles won't stop bouncing

[xr4y]

Hello,

I'm having some problems with particles colliding with geometry as stated in the subject line. What am I missing here?

I've tried changing the resilience value but i have to go down to something like .1 to make it not bounce forever - which is to low. What I want is to keep resilience around .5 and then increase some kind of damping-value to make it loose energy (ie stop bounce).

I hope it makes sense, thanks

[tbriggs]

lower the conserve value on the particle, start at about .995, they will gradually lose energy

[danielroizman]

i recommend hooting and hollering to A|W to fix this. its been around for a long time and they just don't want to fix it. it's most likely some numerical accuracy excuse, but particles really do need to stop bouncing at some point. you can write an expression to see if the particle has collided more than once over the span of 3 frames and then kill the velocity, but that's ugly and doesn't allow for particles to slide smoothly across a surface.

[xr4y]

Unfortunately this isn't just another conserve issue

It's sad that A|W hasn't fixed this apperently well known issue. Now I'm stuck doing it with a nasty expression.

This is probably a bit off topic but how do you stop particles which is falling with gravity on a pp basis? Even though I kill the velocity gravity keeps pulling the particles down.

[dazmanian23]

The resiliance at 0.5 work for me realy good,
I am not sure ,but maybe you got other settings
messing things up......
hope that help

[tbriggs]

In dynamation, from which most, but not all of Maya dynamics were lifted, there was an attribute called coupling, which defined the influence of fields on particles. If you wanted to ramp down a field's effect on a particle you lowered the coupling. Sad to say, no matter how many time's I've asked they never put it back in.