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Question by RandomUser123 · Aug 21, 2014 at 08:18 PM · raycastnullreferenceexceptionhit

Issue with raycast hit

I have this code in my Update function:

     if(Input.GetButtonDown ("Fire1"))
     {

         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);

         RaycastHit hit = new RaycastHit();

         //Throws an error here
         Debug.Log (hit.collider.gameObject.name);

         if(Physics.Raycast(ray, out hit))
         {
             //Does not get here
             Debug.Log ("here");
         }
     }

The error I get is:

 NullReferenceException: Object reference not set to an instance of an object
 raycast.Update ()

I don't really know what's causing it, this is all I have. Can anyone help out?

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Answer by Stefan Alexander · Aug 21, 2014 at 08:30 PM

Give this a go and let me know what happens:

 var TheDamage : int = 50;
 var Distance : float;
 var MaxDistance : float = 1.5;
 var TheSystem : Transform;
 
 function Update ()
 {
     if (Input.GetButtonDown("Fire1")) 
     {
         //Attack animation - IF YOU ARE GETTING ERRORS BECAUSE YOU HAVENT MADE AN ANIMATION AND ATTACHED IT, DELETE THE FOLOWING LINE.
         animation.Play("Attack");
 
     }
     if (animation.isPlaying == false)
     {
         animation.CrossFade("Idle");
     }
     
     if (Input.GetKey (KeyCode.LeftShift))
     {
         animation.CrossFade("Sprint");
     }
     
     if (Input.GetKeyUp(KeyCode.LeftShift))
     {
         animation.CrossFade("Idle");
     }
 }
 
 function AttackDamage ()
 {
         //Attack function
         var hit : RaycastHit;
         if (Physics.Raycast (TheSystem.transform.position, TheSystem.transform.TransformDirection(Vector3.forward), hit))
         {
             Distance = hit.distance;
             if (Distance < MaxDistance)
             {
                 hit.transform.SendMessage("ApplyDamage", TheDamage, SendMessageOptions.DontRequireReceiver);
             }
         }
 }
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