MonoBehaviour.OnCollisionStay Manual     Reference     Scripting  
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function OnCollisionStay (collisionInfo : Collision) : void


OnCollisionEnter is called once per frame for every collider/rigidbody that is touching rigidbody/collider.

In contrast to OnTriggerStay, OnCollisionStay is passed the Collision class and not a Collider. The Collision class contains information about contact points, impact velocity etc. If you don't use collisionInfo in the function, leave out the collisionInfo parameter as this avoids unneccessary calculations. Note that collision events are only sent if one of the colliders also has a non-kinematic rigid body attached.

function OnCollisionStay(collisionInfo : Collision) {
// Debug-draw all contact points and normals
for (var contact : ContactPoint in collision.contacts) {
Debug.DrawRay(contact.point, contact.normal, Color.white);

OnCollisionStay can be a co-routine, simply use the yield statement in the function.