HOW TO CALLBACK COLLIDER WITH NAME?

Question

hi, sorry for my bad English, I’m trying to make a platform game 2d, the player has two objects. The parent object contains two Colliders2d (box, circle), but I don’t know how to recall the Collider by name on "onCollisionEnter" please help me!! thanks.

Answer 1

Answer by tocu-adrian · Jul 21, 2020 at 02:30 PM

Hi, If i understand, you want the collider name; Try this:

 private void OnCollisionEnter2D(Collision2D collision)
 {
     var collider = collision.GetContact(0).collider;
     var otherCollider = collision.GetContact(0).otherCollider;
 }

Tell me if you have any problems.

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theas00 · Jul 21, 2020 at 08:51 PM 0

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thanks, the code works, but the collision is detected in both Colliders even if the other object touches only one...

tocu-adrian theas00 · Jul 23, 2020 at 12:25 PM 0

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Do you want something like this: when an object collide with the box collider then he must execute an action and when it collide with the circle it must execute another action ?

For this you can do something like this :

     private void OnCollisionEnter2D(Collision2D collision)
     {
         var collisionWith = collision.GetContact(0).otherCollider;
         
         if(collisionWith.name == "box")
         {
             //do box behaviour
         }
         else if (collisionWith.name == "circle")
         {
             //do circle behaviour
         }
     }

Keep in $$anonymous$$d that in "collisionWith.name" is stored the name of the gameobject that contain one of your collider. This is the case where you have two gameobjects as child of your parent, each of them have an collider.

But if you have one parent with two colliders. And you want to detect which collider was hit, then do this:

     private void OnCollisionEnter2D(Collision2D collision)
     {
         var collisionWith = collision.GetContact(0).otherCollider;
 
         if(collisionWith.GetType() == typeof(BoxCollider2D))
         {
             Debug.Log("Box Collider");
         }
         else if (collisionWith.GetType() == typeof(CircleCollider2D))
         {
             Debug.Log("Circle Collider");
         }
     }

theas00 tocu-adrian · Jul 23, 2020 at 02:35 PM 0

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thank you so much for your availability, problem solved!!

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Answer 2

Answer by gjf · Jul 21, 2020 at 01:51 PM

You mean OnCollisionEnter(), right?

https://docs.unity3d.com/ScriptReference/Collider.OnCollisionEnter.html

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theas00 · Jul 21, 2020 at 02:05 PM 0

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hi, I tried this code, but don't work....

if (GetComponent().GetType() == typeof(BoxCollider2D)) { Debug.Log("Box") } if (GetComponent().GetType() == typeof(CircleCollider2D)) { Debug.Log("Circle") }

HOW TO CALLBACK COLLIDER WITH NAME?

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