Collision2D
| Class Name | Description | 
|---|---|
| Collision2D.Collider | Output Collider2D hit from Collision2D. | 
| Collision2D.GameObject | Output GameObject hit from Collision2D. | 
| Collision2D.RelativeVelocity | Output the relative velocity of the two collided objects. | 
| Collision2D.Rigidbody | Output Rigidbody2D hit from Collision2D. | 
| Collision2D.Transform | Output Transform hit from Collision2D. |