Currently I'm trying to let the player place a GameObject in the world. You can imagine this like a RTS game where you can place a building you have just build.
My problem now is, in order to avoid that the new GameObject intersects with another I check for collisions. For this my GameObjects have a BoxCollider (MeshCollider did not work) and a non kinematic RigidBody.
The first tests looked promising but now I'm facing a problem I can't quite explain: Sometimes, but not always OnCollisionEnter and OnCollisionExit are called over and over again, even when both objects are not moving. They overlap and stay that way. I had guessed that they always only get called once.
My Unity version is 5.3.0f4.
Further information: Each of my GameObjects have a guid so I can identify. They get generated when the GameOject is created. The debug output in OnCollisionEnter and Exit look like this:
OnCollisionEnter from 593b209f-cc63-4d31-9911-34c5f69ac224
Collided with: 77e05881-2adb-459d-a134-8205cf4e3327
OnCollisionEnter from 77e05881-2adb-459d-a134-8205cf4e3327!
Collided with: 593b209f-cc63-4d31-9911-34c5f69ac224
OnCollisionExit from 593b209f-cc63-4d31-9911-34c5f69ac224!
OnCollisionExit from 77e05881-2adb-459d-a134-8205cf4e3327!
And then the same output again.
I'm happy for any hints and help. :)