https://docs.unity3d.com/Manual/CollidersOverview.html
When two objects collide, a number of different script events can occur depending on the configurations of the colliding objects’ rigidbodies. The charts below give details of which event functions are called based on the components that are attached to the objects. Some of the combinations only cause one of the two objects to be affected by the collision, but the general rule is that physics will not be applied to an object that doesn’t have a Rigidbody component attached.
| Collision detection occurs and messages are sent upon collision | ||||||
|---|---|---|---|---|---|---|
| Static Collider | Rigidbody Collider | Kinematic Rigidbody Collider | Static Trigger Collider | Rigidbody Trigger Collider | Kinematic Rigidbody Trigger Collider | |
| Static Collider | Y | |||||
| Rigidbody Collider | Y | Y | Y | |||
| Kinematic Rigidbody Collider | Y | |||||
| Static Trigger Collider | ||||||
| Rigidbody Trigger Collider | ||||||
| Kinematic Rigidbody Trigger Collider | ||||||
| Trigger messages are sent upon collision | ||||||
|---|---|---|---|---|---|---|
| Static Collider | Rigidbody Collider | Kinematic Rigidbody Collider | Static Trigger Collider | Rigidbody Trigger Collider | Kinematic Rigidbody Trigger Collider | |
| Static Collider | Y | Y | ||||
| Rigidbody Collider | Y | Y | Y | |||
| Kinematic Rigidbody Collider | Y | Y | Y | |||
| Static Trigger Collider | Y | Y | Y | Y | ||
| Rigidbody Trigger Collider | Y | Y | Y | Y | Y | Y |
| Kinematic Rigidbody Trigger Collider | Y | Y | Y | Y | Y | Y |
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