Check if colliding with a layer

Question

I want 2 if statements to check if and if not colliding with a layer called ground for jumping in my 2d platformer. I tried to copy from the unity 2d platformer tutorial but that doesn't seem to be working, any tips on how to check if colliding with a layer called ground

 public void Jump(){
         Debug.Log ("jump has also been called");
         if (grounded) {
             GetComponent<Rigidbody2D> ().velocity = Jumpforce;
             Debug.Log("grounded is true");

Answer 1

Best Answer

Answer by Positive7 · Aug 06, 2015 at 02:52 PM

 public bool isGrounded;
     void OnCollisionEnter(Collision collision)
     {
         if (collision.gameObject.layer == 8 //check the int value in layer manager(User Defined starts at 8) 
             && !isGrounded){
             isGrounded = true;
         }
     }
     void OnCollisionExit(Collision collision)
     {
         if (collision.gameObject.layer == 8 
             && isGrounded){
             isGrounded = false;
         }
     }

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bracciata · Aug 10, 2015 at 02:52 PM 0

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I added a debug.log to log if collided with layer and it's not logging when exiting or entering.

Answer 2

Answer by Krnitheesh16 · Sep 02, 2021 at 05:58 AM

Using the bitwise operator you can able to find collisions with a layer mask.

         public LayerMask layerMask;
         private void OnTriggerEnter(Collider other) {
             if ((layerMask.value & (1 << other.transform.gameObject.layer)) > 0) {
                 Debug.Log("Hit with Layermask");
             }
             else {
                 Debug.Log("Not in Layermask");
             }
         }

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Check if colliding with a layer

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