RE: Particle obstacle friction???

["Marc-Andre Carbonneau" <marc-andre.carbonneau(at)ubisoft.com>]

I might have a solution but it involves a little scripting…

Don’t have time to check it out right now but use the user parameter option in the ptype ppg.  Essentially create a custom user parameter call it particle_hit_floor. Once the particle hits the floor set the value of the user parameter, example: particle_hit_floor =30 and store the particle rotation values. Now you can have a loop that runs and sets the rotation to the stored values if the particle_hit_floor param = 30. or something like that…

 

MAC

 

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From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Morten Bartholdy
Sent: September 27, 2006 8:56 AM
To: XSI(at)Softimage.COM
Subject: Re: Particle obstacle friction???

 

Now if only there also was a mechanism built in to make them stop rotating when they lie still (one that doesn't require scripting that is).

 

MB

 

 

----- Original Message -----

From: Morten Bartholdy

To: XSI(at)Softimage.COM

Sent: Wednesday, September 27, 2006 2:39 PM

Subject: Re: Particle obstacle friction???

 

How stupid of me to not htink of adding friction to the particles too...

 

Now everything works just fine - thanks Peter!

 

MB

 

 

 

----- Original Message -----

From: peter boeykens

To: XSI(at)Softimage.COM

Sent: Wednesday, September 27, 2006 1:48 PM

Subject: Re: Particle obstacle friction???

 

just to mak sure: you need friction on both the obstacle and the particles (ptype > environment > below all the forces.)

usually I put friction to 1 on the obstacle and then tweak the ptype friction to get what I want.

 

also try "use particle size for collision" to see which works best for your case.

 

no need to mess with accuracy or collision type, or rbd's

 

 

 

----- Original Message -----

From: Morten Bartholdy

To: XSI(at)Softimage.COM

Sent: Wednesday, September 27, 2006 1:17 PM

Subject: Particle obstacle friction???

 

I have done a particle animation where particles hit the ground and are supposed to bounce a bit and then stop. I have increased coliision friction to almost 100% but the particles still slide along the ground after impact. Any ideas on how to get it working? Upping the collision accuracy, B-plane, b-box or actual shape - doesn't matter.

 

I know, last resort is to plot and edit fcurves after impact but that kind of sucks. I have even considered RBD but would like to know if I can get the particle solution working before spending the extra time?

 

Thanks!

 

 

Morten Bartholdy
3D & VFX Artist