Forums > Jitter

jit.phys slow down to stop


micron
November 8, 2012 | 11:02 pm

Hi, does anyone know why with friction 0. and dumping 0. 0. my ball slow down to stop?
Thanks

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Rob Ramirez
November 9, 2012 | 9:55 pm

not sure why this happens, but make sure you check out the phys.body.velocity example patch that demonstrates how to query and control the velocity of a rigid-body:
Max6/examples/jitter-examples/render/physics/phys.body.velocity.maxpat

you probably want to make sure you are upgraded to 6.0.8 too.


micron
November 10, 2012 | 9:04 am

Thank you this solves my problem :)


micron
November 11, 2012 | 12:08 am

Controlling velocity is a good workaround but maybe it is better fix the problem around restitution
I searched in the Bullet forum and i found this thread http://bulletphysics.org/Bullet/phpBB3/viewtopic.php?f=9&t=7922&hilit=restitution
the administrator speak about:
"enable split impulse, it will prevent the added energy (velocity) from penetrations.
Code:
m_dynamicsWorld->getSolverInfo().m_splitImpulse = true;"

Is possible to control split impulse in jitter?
Thanks


Rob Ramirez
November 12, 2012 | 5:33 pm

thanks for digging that up!
i will look at implementing this as an option to phys.world.


micron
November 12, 2012 | 6:26 pm

I’m happy if this can help you
I wait for news
thanks


micron
March 1, 2013 | 12:50 pm

Hi, I’m looking for a solution to disable object penetration
here a simple example of the problem, I would like the ball doesn’t pass through the plane.
Thank you for your help

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matmat
March 1, 2013 | 10:53 pm

hi
you could increase "fixedtimestep" and "maxsubsteps"
there is a good explanation here :

http://cycling74.com/forums/topic.php?id=38167

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micron
March 1, 2013 | 11:09 pm

Thanks so much

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