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Dynamics and Balls on a Track
I’m trying to roll a ball along a stretch of metal track using Dynamics, similar to the section of this video from :18 to :45.
I’ve tried setting this up just using polygon conversions of tube primatives with Rigid Body tags, and a poly version of a sphere with a Rigid Body tag. When I use this setup, my ball slowly sinks through the tubes. I’ve tried changing the oversampling and subsampling, and messing with the Collision Eps, but neither of these have any predictable effect — I can’t optimize this to the point where it actually works.
If anyone has any advice or can post a demo scene that would be awesome!
Thanks,
–Will -
6 Replies
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I would say do it with Cloth. Maker the ball cloth and everything else collider objects.
/randy -
Thanks for the response. I’ve been messing with settings on the cloth tag and am having a hard time keepng the ball from collapsing when it hits the rails… Are there specific settings you reccomend to prevent this?
I will also need to have balls bounce off of each other on the rails, will this present a problem?
–Will
getnmd.com
nationalboston.com -
Yea the impacts will be hard to remove any squish you can bump the stiffness up to 10000 i believe Flexon really high will get it to return to its shape faster. If you are going to have several colliding you will need to make them all one object and enable self collision. Changing the mass might help reduce the squish too…just be sure to adjust the gravity to avoid an underwater look.
Using cloth is just a work around so it wont be perfect. Personally I have never been able to get good results from dynamics. So I bought Remotions Silver Bullet. Its worth the money.
/randy
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Thanks for the info. I’ve got it working OK with one ball now.
–Will
getnmd.com
nationalboston.com -
it’s tough getting the ball to roll smoothly with Dynamics (unless some other sphere type works better) but if you ignore roll and let it slide down the rails it’s not too hard. A test.
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Ahh, there we go – more polys
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