koobas.hobune.stream
Why does OnCollisionStay returns multiple contact points in such a strange way?
Hi there, updated this Question, because of something I noticed and to clarify some more:
I've got a rigidbody with a spherecollider and need a way to keep track of all the points it is currently in contact with. I thought OnCollisionStay would be the way to do this, but somehow it gives unexpected results.
My test cases are the following: The SphereCollider is sitting on a stairway, in case A composed of BoxColliders, in case B a single mesh collider/imported 3dmodel
Than I'm printing the contact.points with this script:
function OnCollisionStay (collision : Collision) { grounded=true; print(collision.contacts.Length); for (var contact : ContactPoint in collision.contacts) { print(contact.otherCollider + " " + contact.point); } collisions = collision;
}
As you already may have noticed in the pictures the console output is very, very strange:
In Case A it says it has 2 contact.points, but then prints 2 times the coordinates of the first contact and than 2 times the coordinates of the second, instead of printing both coordinates at once.
CASE B is even worse it says it has 2 to 8 contacts and about half of the printed coordinates belongs to the first and half to the second contact point.
I considered that this might have to do with the number of vertices of the stairway mesh compared to the two box colliders, but I dont see why this should be the way oncollisionstay is supposed to work. Maybe I'm wrong but shouldn't be the output more like this:
Number of Contacts
Coordinate 1.Contact
Coordinate 2.Contact
...
Number of Contacts
Coordinate 1.Contact
Coordinate 2.Contact
...
If anybody knows the reason for this, or has any suggestions for a work arround, so that I can have an output like shown above, I would be very glad.
I hope I described the problem well enough, otherwise feel free to ask and I will clarify. As alway any help is appreciated. Thanks!
