SOLVED: OnJointBreak

I have several joints attached to a rigidbody, but i"m interested in knowing when a few particular joints break. The OnJointBreak function seems to pass only the force information to the event, which is pretty useless to me in discerning which joint broke.

Is there a better way to detect this?

 

In case anybody's interested, I found a solution for this. I noticed it posted a few other places in this forum.

The best way I can see of how to do it is to create your joint in code and keep a reference to it.

Here's a small function I made that creates one:

Code (csharp):

1.  
2. public static FixedJoint CreateFixedJoint(Transform parent, Transform attachedTo, float breakForce)
3.     {
4.         FixedJoint result = parent.gameObject.AddComponent<FixedJoint>();
5.         result.connectedBody = attachedTo.rigidbody;
6.         result.breakForce = breakForce;
7.         return result;
8.     }
9.  

And you would assign it by the following code:

Code (csharp):

1.  
2. FixedJoint fixedJoint = CreateFixedJoint(coreRigidBody, appendageRigidBody, 3000);
3.  

When the joint breaks, it will become null. So wherever you're using it, simply check for it by going:

Code (csharp):

1. if (fixedJoint != null)

If it comes back true, the joint is still in tact. If it comes back false, the joint has been broken.

This takes advantage of the fact that Unity destroys the joints after they are no longer needed.

 

I tried the same approach and found out that the joint (I use the configurable one) doesn't get destroyed instantly, I have to wait till the next frame to check the joint state.

Code (csharp):

1. private IEnumerator OnJointBreak(float breakForce)
2. {
3.     Debug.Log("OnJointBreak");
4.     yield return null;
5.     if (joint == null)
6.     {
7.         // ...
8.     }
9. }

 

here the best Solution
OnJointBreak Called when a joint attached to the same game object broke.
OnJointBreak2D Called when a Joint2D attached to the same game object breaks.


[Go to MonoBehaviour.OnJointBreak2D(Joint2D)][1]


[1]: https://docs.unity3d.com/530/Documentation/ScriptReference/MonoBehaviour.OnJointBreak2D.html

 

OnJointBreak seems like a badly-designed message callback. The Joint that broke should be passed in as an argument.

 

Having the same issue. Reference to the broken Joint should be passed in as an argument for OnJointBreak().