CGTalk - control emitter speed on particle collision event

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phyllit

08-01-2007, 07:51 PM

hi,

is there a way to control the emitter speed and/or rate on a particle collision event per particle? or in other words: where do i find the attributes of the collision emission?

it is because i want a particle to hit the ground and then blow off tiny pieces of sand, but the 'inherit velocity' attribute doesn't provide the sand burst with enough speed and the other thing is that i want the emission to be stopped when the original particle is lying still.
i've tried killing the lifespan of the collision emitted particles if the speed of the original particle gets below a certain value, but i don't fancy that look too much...

Aikiman

08-02-2007, 02:44 AM

I think I can answer the second part of your question and that is have a play with the geo connector which is created after you make the collision event. Lower the friction so that your second particle shape slides across the surface. Also there is a spread factor on your event manager.

As for the first part, somehow you will have to emit zero particles on a collison count greater than one. Not sure on the mel though, sorry. Although if you set your max count for your second particle shape that will help stop the emission without using mel.

phyllit

08-02-2007, 03:44 PM

thanks mate, controlling the max particle count is a good idea! haven't thought about that...
anyway, thanks for the tip!
cheers

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