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View Full Version : How to get Intercollisions between instanced geometry?


erakesh
06-18-2002, 09:54 AM
Hi everyone..

I have model of a coin, which I instanced to the particles and setup my scene to make the coins fall on the ground and settle down. But the problem is the instanced coins penetrate each other and are not on top of each other.

I need to make a heap of coins and some coins still falling (WITHOUT INTERPENETRATING). How do I do it?

Can you pls help me out.

:rolleyes:

Darrell Croswell
06-18-2002, 08:19 PM
particles->make collide.
then just play with your resilience and friction. you will want high resilience and low friction (or is it vice versa...i forgot).

if that does not work you can make your particles to be active rigid bodies. you will need to make your ground plane (or whatever the coins are landing on) to be an active rigid body as well (soft/rigid bodies->create active rigid body). after that it is the seemingly unending process of tweaking the attributes of each.
hope this helps.
D

stunndman
06-18-2002, 09:18 PM
there's a particle collider plugin available at highend3d - but i'm not sure if it works on instanced particles too

may be worth to check it out - http://www.highend3d.com/maya/plugins/?group=mayaplugins&section=dynamic

wrend
06-18-2002, 09:48 PM
you cant make particles rigid, nor their instances - as far as ive noticed. do you have to use particles? why not just randomly splay the coins and let them drop past the camera? are you controlling them w particle expressions? perhaps you might look into placing real copies on the particles using the instancer script on highend3d, just for initial placement ..if you want to have 'em ride w the particles & do rigid collisions, your in for a bit of fun!

g.luck

Darrell Croswell
06-18-2002, 10:16 PM
i meant to use them as geometry. then you can make them work with fields and other rigid bodies as an active rigid body. just dont instance them...they'll still have the same attributes when you link them with the fields.

remember to use active rigid bodies so they will work with the fields. if you use a passive rigid body it will only "collide" (or have relationships) with other rigid bodies, but not fields.

D

erakesh
06-19-2002, 04:26 AM
Thanks to you all:)

I have used instanced geometry becoz I wanted to create a heap of these coins and at a random go. I had another shot, where I have used the duplicates of the original geometry, as the number of the coins was small.

I'm going to check out the pluggins you have suggested and try my luck. I feel, things get a lot easier and comfortable with the usage of particles over instanced geometry. But if I'm not going to get what I want thru particles, then there is the last option of duplication. Thank to all of you..

If anything new strikes you, how to solve this. Please let me know.

:) :)

erakesh
06-19-2002, 07:40 AM
Hi all

I have tried the ParticleCollider pluggin. It is a good one, but not for too many coins, that I have. Well atlast, I had to settle for the manual arrangements and some little Dynamics. It seems to work for the time being. But we still need to find out if there is this possibility(Inter Collisions) in Maya for Instanced Geometry.

Bye
Lav ya all

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