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Question by fir3st0rm9 · Jan 27, 2013 at 02:56 AM · gameobjectraycasttagraycasthitnpc

Raycast Based on GameObject Tag

Hi, I'm trying to make a script to talk to NPC's in my game and I want to raycast so that anything that is 3 infront of the player & has the tag "NPC" will talk to the player.

 var hit : RaycastHit;
 
 function Update () {
 
 var fwd = transform.TransformDirection (Vector3.forward);
     if (Physics.Raycast(transform.position, fwd,hit,3)&&hit.transform.gameObject.tag == "NPC") {
         
             Debug.Log("NPC");
         
     }
 }


When using this code, and I walk up to the NPC, nothing shows in the log. Can you please help to show me where I went wrong?

Thanks!

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avatar image AlucardJay · Jan 27, 2013 at 05:36 AM 0
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Seperate your conditionals in your argument :

 if raycast {
 then if tagged {

e.g. :

 var hit : RaycastHit;
  
 function Update() 
 {
     if ( Physics.Raycast( transform.position, transform.forward, hit, 3 )
     {
         Debug.Log( "ray hit (tag) : " + hit.collider.gameObject.tag + " : " );
         
         if ( hit.collider.gameObject.tag == "NPC" ) 
         {
             Debug.Log("NPC");
         }
     }
 }
avatar image fir3st0rm9 · Jan 27, 2013 at 05:41 AM 0
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Hmmmm... When I walk to the NPC, the console says: ray hit (tag : Untagged :

But the NPC has the tag NPC on it and the console does not log NPC so I am inclined to think that there is something wrong with the second if statement.

  if ( hit.transform.gameObject.tag == "NPC" ) 
         {
             Debug.Log("NPC");
         }
avatar image AlucardJay · Jan 27, 2013 at 05:52 AM 0
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Nope, the Debug doesn't lie.

Your raycast is detecting a collider that is Untagged . Check the tagging of the Colliders of your object.

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