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nfrancisj
01-11-2011, 10:17 AM
hello all...

Does anyone know how to emit particles and have them clump together? Something similar to the multipoint render type but I want to instance geos on to them.

thanks

Phlok
01-11-2011, 12:12 PM
Have you tried nParticles and using Force Field Generation -> Self Attract?. Probably adding Self Collide might also help.

mandark1011
01-11-2011, 05:11 PM
surface tension in the liquid simulation tab can help to clump particles too

Phlok
01-11-2011, 09:34 PM
Oh yes, good point. Also, making them sticky when self collidin might result in nice clumps.

BillyTheKid123
01-11-2011, 10:02 PM
Or try emitting particles from your first ones using per point emission rates. Then maybe use the emitter particles as goals. Eg

http://download.autodesk.com/us/maya/2010help/index.html?url=Particles_Particle_goals.htm,topicNumber=d0e379426

nfrancisj
01-11-2011, 11:34 PM
ooo..so many ways... hahaha Thanks guys I will try it when I get home tonight and get back to ya

thanks

nfrancisj
01-12-2011, 01:11 PM
sorry guys..none of them gave the results I wanted. With force field gen and fluid tension the particles would collapse on them selves. Im looking for a kinda attract field with a radius and a distance limit the particles can come close to each other but not cross or touch. the closest I got is with a emmision from a animated texture...but its still a bit wonky.. :)
I can get the effect I am looking for with 3dsmax using the keepApart field in pflow. is there something like that in maya? any more ideas?

Thanks again for all your help!!:thumbsup:

mandark1011
01-12-2011, 04:48 PM
did you set the self collide radius to greater than 1? you can also visualize the size of the collisions in the collisions tab.

Aikiman
01-12-2011, 07:52 PM
Goals with a negative Force Field and max distance to push particles away might work.

HowardM
01-13-2011, 12:43 AM
Have you tried nparticles with nconstraints? ;) slow as hell with alot of particles, but works somewhat depending on what you need it for...

http://vimeo.com/18728698

nfrancisj
01-14-2011, 12:44 AM
@Aikiman (http://forums.cgsociety.org/member.php?u=174420) I'm not sure how to setup particle to particle goal. Would you mind a quick explanation please.

@HowardM (http://forums.cgsociety.org/member.php?u=3514) I tried using the constraints and it is extremely slow!! haha.

I though of just grouping rock geos in different configs with random rotations. Its a lot faster and its very close to the effect i want...but I would still like to investigate a way to clump with just particles. Does anyone know the math/script behind the KeepApart Node in Max?

thanks guys

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