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Question by motionsmith · Mar 30, 2012 at 05:24 PM · rigidbodyragdolliskinematic

Eject Overlapping Bodies Without velocity

I'm working on a ragdoll system when a character dies.

If I turn off a rigidbody's isKinematic property when it's already penetrating geo, the body is ejected with velocity from the geo. Obviously, I do want the collision to be solved, but I'd rather the rigidbody be placed nicely outside of the geo rather than flinging it out. Can this be accomplished?

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Answer by aldonaletto · Mar 31, 2012 at 02:16 AM

Do you mean "turn off isKinematic"? A rigidbody ignore physics when isKinematic is true, and return to physics control when it's set to false.
Anyway, the problem you've mentioned is probably the "penetration penalty force", a repulsion force applied to the penetrating rigidbody.
You could use a simple script to limit the rigidbody velocity:

var limVel = 0.1;

function FixedUpdate () { if (!rigidbody.isKinematic){ rigidbody.velocity = Vector3.ClampMagnitude(rigidbody.velocity, limVel); } } You can set limVel to some high value (say, 100) to disable the velocity limit, if you want to restore regular behaviour.

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avatar image motionsmith · Apr 01, 2012 at 03:39 AM 0
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Yes, I did mean "off", thanks for the correction.

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Answer by rutter · Mar 31, 2012 at 02:17 AM

Haven't tried it, but maybe you could catch this with OnCollisionExit()?

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