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Question by Skellington · Sep 12, 2013 at 10:40 AM · raycasttagsdialoguelink

How do I change the value of a tag with raycasting?

I have code here that when executed changes the value of the tag, but only changes the tag back to it's original value if I keep the mouse hovering over the object I click on.

 var turnOn : scriptDialogueDisplay;
 turnOn = GetComponent(scriptDialogueDisplay);
 
 //This is the raycast!
 function Update() {
 var ray : Ray = Camera.main.ScreenPointToRay(Input.mousePosition);
 var hit : RaycastHit;
     
     if (Physics.Raycast(ray, hit, 100))
     {
         if (Input.GetMouseButtonDown(0))
         {
             if (hit.collider.tag == "NPC")
             {
                 turnOn.isOn = true;
                 hit.collider.transform.tag = "ActiveNPC";
             }
         }
     if (turnOn.isOn == false)
         {hit.collider.transform.tag = "NPC";}
     }
 }

I want the transition between being ActiveNPC and being NPC to be instantaneous, but I have no idea how to do this...

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avatar image ShadoX · Sep 12, 2013 at 12:37 PM 1
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Well, the code only seems to work if the Ray hits anything, so have you tried keeping a pointer to the NPC and then setting it's value once the Ray stops hitting it?

Something like..

 var turnOn : scriptDialogueDisplay;
 turnOn = GetComponent(scriptDialogueDisplay);
 var tempNPC : Transform = null;
  
 //This is the raycast!
 function Update() {
 var ray : Ray = Camera.main.ScreenPointToRay(Input.mousePosition);
 var hit : RaycastHit;
  
     if (Physics.Raycast(ray, hit, 100))
     {
        if (Input.Get$$anonymous$$ouseButtonDown(0))
        {
          if (hit.collider.tag == "NPC")
          {
           tempNPC = hit.collider.transform;
           turnOn.isOn = true;
           hit.collider.transform.tag = "ActiveNPC";
          }
        }
     } else if (turnOn.isOn == false && tempNPC!=null)
        tempNPC.tag = "NPC";
        tempNPC = null;
     }
 }

I didn't test it, but it should probably work..

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