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Question by Rick74 · Jan 04, 2014 at 12:28 AM · javascriptraycast

Trying to display object name of raycast hit

Hey

All I'm trying to do is get the name of a raycast mouse over. But with this current code, I'm getting Null reference exceptions. Anything I'm doing that's wrong here?

 function Update ()
 {
      var hit : RaycastHit;                                                        
      var ray = Camera.main.ScreenPointToRay ( Input.mousePosition );    
 
      if (Physics.Raycast (ray, 30) && Input.GetMouseButtonDown(0)) 
     {
         print (hit.collider.gameObject.name);
     }
 }        
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avatar image Kiloblargh · Jan 04, 2014 at 12:51 AM 0
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Also for efficiency's sake you should put the raycast in the if InputGet$$anonymous$$ouseButtonDown check, not the other way around, unless you have some other reason to be checking every frame what the mouse is over.

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Answer by ziv03 · Jan 04, 2014 at 12:40 AM

That's because you don't assign the raycast to the hit var. try this:

 function Update ()
 {
      var hit : RaycastHit;                                 
      var ray = Camera.main.ScreenPointToRay ( Input.mousePosition );    
      hit = Physics.Raycast (ray, 30);
      if (hit && Input.GetMouseButtonDown(0)) 
      {
        print (hit.collider.gameObject.name);
      }
 }  
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avatar image Rick74 · Jan 04, 2014 at 01:16 AM 0
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Thanks! I knew it was something small I overlooked!

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