destroy gameobject with ray

Question

hey,

I am trying make a scipt to destroy gameobject which is hit by ray that I am casting. Ray casting is working good, but when it hits gameobject it makes this error:

NullReferenceException: Object reference not set to an instance of an object Movement.Update () (at Assets/Scripts/Movement.js:13)

I cant figure it out. #pragma strict

 var fwd;
 var hit : RaycastHit;
 
 
 function Update () {
     if(Input.GetKey("s")){
         fwd = transform.TransformDirection (-Vector3.up);
         Debug.DrawRay(transform.position, fwd, Color.green);
         
         if (Physics.Raycast (transform.position, fwd, 10)) {
              Destroy(hit.collider.gameObject);
         }
     }
 }

Answer 1

Best Answer

Answer by KellyThomas · Dec 26, 2013 at 03:55 PM

This error is telling you that hit has no value assigned to it. This is because you never assign a value to it.

There is an overload of Physics.Raycast() with the following signature:

static function Raycast(origin: Vector3, direction: Vector3, hitInfo: RaycastHit, distance: float = Mathf.Infinity, layerMask: int = DefaultRaycastLayers): bool;

You can use it by making the following change:

 //  if (Physics.Raycast (transform.position, fwd, 10)) {
 if (Physics.Raycast (transform.position, fwd, hit, 10)) {

After making this change you will be passing hit into the Raycast() function where it will be populated with information about the RaycastHit (if one occurs).

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maroltl · Dec 26, 2013 at 05:16 PM 0

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thank you sir. working perfectly now.

destroy gameobject with ray

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