Rigidbody physics falling alseep and not waking up!

Unity Engine
1

My game is made of a moving character and inanimate objects which it can collide with. Therefore, I have added a sphere collider to all objects (including the character), and a rigid-body only to my character. Add to that the fact that the character has 2 scripts, one for controlling it’s position through a script, and one to detect any collisions (the collider has IsTrigger enabled).

Now everything works fine 3 times out of 4, but sometimes, my rigid-body goes into sleep, and even if I call WakeUp it seems to stay asleep for a few seconds before kicking back in.

I have tried settings the sleepVelocity and sleepAngularVelocity values to very high and low values to no avail.

Now my question is this: did I do something wrong? Is it ok to have only one rigid-body and then colliders (the documentation seems to say so)? Why is the system going to sleep like this? Why is my WakeUp not having any effect?

PS: The behaviour seems to be worse when run on the iPhone. The engine probably send ths physics of the rigidbody to sleep more often…

2

How do you know that the object is going to sleep?

3

I Debug.Log when mw rigid-bodie’s “IsSleeping” function returns true.

4

OK, I only asked because I was wondering if sleeping really has anything to do with the problem you are having. I have never had a problem with the rigidbodies waking up. In fact, I have a project that I have been working on for a year that contains 100’s of rigidbodies and absolutely relies on the bodies waking up instantly… this has never been an issue for me.

Maybe you could isolate the problem and then post the code here for us to see?

5

Sorry, I’m bumping my thread a bit up. Still haven’t found a solution and it’s really causing me problems. The problem is I have no idea where the problem could be coming from. It’s the first time I use Unity, the firs time I use it’s physics features. I’m not even sure I’m setting my GameObjects correctly. The documentation doesn’t seem to help.