| OnCollisionHit | Called when a collider/rigidbody hits another collider, including repeated hits on the same shape while they are already touching. |
| OnCollisionStart | Called when a collider/rigidbody starts touching another collider. |
| OnCollisionStop | Called when a collider/rigidbody stops touching another collider. |
| OnCollisionUpdate | Called once per physics step for every collider being touched. |