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Question by DrIcy · Oct 23, 2013 at 04:00 PM · javascriptspotlightturnon and off

How do i make a Spotlight able to turn on and off in Javascript?

I have been trying all day to get this too work but it just doesn't seem like it want to.

The script errors i get is usually Unkown Identifier: "myLight" I could guess this is as simple as that. But i'm new to both programming and unity.

Heres my code in Javascript:

  public var ficklampa : GameObject;
      
     function Start()
     {
        var myLight : Light = ficklampa.GetComponent("Light");
     }
      
     function Update()
     {
        if (Input.GetKeyDown("f"))
        {
           myLight.enabled = !myLight.enabled;
        }
     }
 
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Answer by Miziziziz · Oct 23, 2013 at 04:48 PM

Make a spotlight. Make an empty GameObject.

make a script like this:

 var ficklampa : GameObject;
 var onOff : boolean;
 
 function Update ()
 {
 if(Input.GetKeyDown(KeyCode.F))
 {
 
 if(onOff == true)
 {
 ficklampa.SetActive(true);
 onOff = false;
 }
 else
 {
 ficklampa.SetActive(false);
 onOff = true;
 }
 }
 
 }

untested script, but shouldn't be any serious errors. Just add this script to the empty GameObject, and drag the spotlight into the slot in the inspector for ficklampa

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Answer by robertbu · Oct 23, 2013 at 04:07 PM

You are very close. Your issue is that you are declaring 'myLight' locally in Start(). So once it is out of scope, it no longer exists. As a minor point, don't use GetComponent() with a string parameter. Pass the type/class. Try this:

 public var ficklampa : GameObject;
 private var myLight : Light;
  
     function Start()
     {
        myLight = ficklampa.GetComponent(Light);
     }
  
     function Update()
     {
        if (Input.GetKeyDown("f"))
        {
           myLight.enabled = !myLight.enabled;
        }
     }

Note if you put the script on the light game object, you can boil this script down to:

 function Update() {
    if (Input.GetKeyDown(KeyCode.F)) {
       light.enabled = !light.enabled;
    }
 }
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avatar image DrIcy · Oct 23, 2013 at 04:10 PM 0
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Unfortunately still doesn't work :S Doesn't get a script error now tho. It just doesn't work.

avatar image robertbu · Oct 23, 2013 at 04:18 PM 0
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I just tested the above code in a simple scene and it worked fine. Try it this way to verify:

  • Create a new scene

  • Create a cube

  • Create a light...directional light or a point light positioned so that it is illu$$anonymous$$ating the cube.

  • Create an empty game object and attach the script

  • Drag the light to the 'Flicklampa' variable in the inspector.

  • Run the app.

This way you can verify the code.

avatar image DrIcy · Oct 23, 2013 at 04:39 PM 0
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Thanks, fixed it now

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