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Question by sandhillceltic · Jun 11, 2013 at 07:24 PM · javascriptraycastvariable

How to set var to the object a raycast touches first (updating)

I need to make a script where a variable is set to the object that a raycast is hitting first at any given moment. I usually post code, but this is one of the only scripting problems I have ever had no Idea what to do. My idea is somewhat like this

 if(raytouch = computer){
    if(getkeydown("e"){
       function("open computer interface");
    }
 }

I know this script is not javascript correct, but it gives an idea of what I want to do.. The problem I am having is setting the var to the gameobject, and then getting it to go into the code. It would also allow GUI that would show what you were looking at, displayed at the bottom of the screen.

Thanks

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Answer by robertbu · Jun 11, 2013 at 07:29 PM

Input.GetKeyDown() only returns true for a single frame, so you can either use Input.GetKey() or you can restructure your logic. It would look something like:

 #pragma strict  
 
 function Update() {
     if (Input.GetKeyDown(KeyCode.E)) {
         var ray = Camera.main.ScreenPointToRay (Input.mousePosition);
         var hit : RaycastHit;
         if (Physics.Raycast (ray, hit)) {
             var go = hit.collider.gameObject;
             var script = go.GetComponent(SomeScript);
             if (script != null)
                 script.OpenComputer();
         }
     }
 }
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avatar image sandhillceltic · Jun 13, 2013 at 02:43 PM 0
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I am slighty confused..I don't understand what this script is doing. Can you explain it to me?

avatar image robertbu · Jun 13, 2013 at 10:35 PM 0
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When the 'E' key is hit on the keyboard, it casts a ray to the object. It then tries to get access to a script called "SomeScript" attached to that object. If it exists, it executes the "OpenComputer()" method on that script. Your class/file name and your function/method name will likely be different.

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