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Question by saltysquid · Apr 29, 2017 at 01:38 PM · 2dcollisiontrigger

OnTriggerEnter2D not called after collision (2D game)

I'm brand new to Unity and I'm having issues with my first collision detection. My moving object is a ball and has Rigidbody2D and CircleCollider2D. My stationary "collider or trigger" is a BoxCollider and has a script attached. The OnTriggerEnter2D should be fired when the ball passes through the stationary box. I've also tried OnCollisionEnter2D but I'm fairly certain I should use OnTriggerEnter2D because my stationary box is marked as a trigger.

My code:

 public class LoseCollider : MonoBehaviour {
 
     public LevelManager levelManager;
     
     void OnCollisionEnter2D(Collision2D collision)
     {
         print("collide");
         levelManager.LoadLevel("Lose");
     }
 
     void OnTriggerEnter2D(Collider2D trigger)
     {
         print("trigger");
         levelManager.LoadLevel("Lose");
     }
 }

And screenshots of my 2 object properties:

Ball: alt text

Collider: alt text

I made sure to keep them on the same Z plane, so I'm fairly certain the objects ARE colliding. I just must be missing something simple in my properties or something. Any help is appreciated.

ball.png (48.0 kB)
collider.png (27.0 kB)
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Answer by Adriannax · Apr 29, 2017 at 06:45 PM

Hi, I'm new to unity also, try the following code in your boxscript 8,-))

 void Update () {
         
     }
     public void OnTriggerEnter2D(Collider2D collision)
     {
         Debug.Log("we are in the trigger");
 
     }
     public void OnTriggerExit2D(Collider2D collision)
     {
         Debug.Log("we have left the trigger");
     }
 }

make sure the ball is set as not a trigger and that the box with the script is set as a trigger, I hope this Is of some help too you, have fun 8,-))

Matt.

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Answer by saltysquid · Apr 29, 2017 at 07:43 PM

Hey thanks. I just figured it out and it seems I added a "Box Collider" to my object instead of a "Box Collider 2D". Once I swapped it out everything worked as expected. :)

Thanks

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