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Question by DiamondMC102 · Sep 17, 2017 at 06:36 AM · scripting problem2d game2d-platformercollision detectionboxcollider2d

How to check if BoxCollider2D collided with another BoxCollider2D?

I have a player and an enemy. The player has a BoxCollider2D and so does the enemy. How can I check if the player's BoxCollider2D collided with the enemy’s BoxCollider2D?

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Answer by PersianKiller · Sep 17, 2017 at 06:44 AM

you can use OnTriggerEnter2D function.

for example I attached this script to a bomb,if player collides with it ,it Will explode.

   void OnTriggerEnter2D(Collider2D other){
     if (other.name == "player") {
            
             Destroy (other.gameObject);
 
     }

 }


you can also check it like this

  void OnTriggerEnter2D(Collider2D other){
     if (other.name == "player") {
            
             // playerCollides with the Enemy
 
     }

 }

and for exit

  void OnTriggerExit2D(Collider2D other){
     if (other.name == "player") {
            
             // player is not colliding  with the Enemy  anymore
 
     }

 }
   

but at least one of your objects should have a Rigidbody2D component and at least of of BoxCollider2Ds should be trigger.

and if your colliders should not be trigger you can use

 OnCollisionEnter2D(Collision2D other){

 }
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Answer by bananatrooper52 · Sep 17, 2017 at 08:10 AM

Check the official Unity documentation on this, it has almost exactly what you're asking for.

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