Controlling visibility of several objects with GUI

Question

Hi.

This is my first attempt at coding with javascript in Unity and I've run into difficulty with what I think should be a relatively simple task.

I have three objects in the scene and I want to control their visibility using three GUI buttons, one for each object. I need it to work so that each button makes an object visible while making the other two invisible.

I have so far got the following script attached to my scene camera:

 function OnGUI () {
 
 
 if (GUI.Button (Rect (20,40,80,20), "Blue")) {
 name = "Sphere-Blue";renderer.enabled = true;
 name = "Sphere-Red";renderer.enabled = false;
 name = "Sphere-Green";renderer.enabled = false;
 
 
     }
 }

Using this I am not getting the behaviour I had hoped for. Ideally, the button named "Blue" would make the "Sphere-Blue" object visible while blocking out the other objects.

Am I even close? Searching the forums has got me to this point but I'm feeling pretty lost now.

Any help would be greatly appreciated.

Kind Regards

Answer 1

Answer by eyeproductions · Apr 18, 2012 at 09:44 AM

Hi.

Yes, "Sphere-Blue" "Sphere-Green" and "Sphere-Red" are the names of the objects I have in the scene, though I'm not sure about the renderer? I haven't attached any renderers, I'm not even sure what that means.

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Answer 2

Add this script:

 #pragma strict

 // Define a button setting data structure
 public class ButtonSwitch
 {
     public var name         : String; // Name of GUI button
     public var renderer        : Renderer; // Reference to actual 3D object
     public var areaOnScreen    : Rect; // Rectangle to place GUI button
 }

 public var buttonAction : ButtonSwitch[]; // An array of all button settings
 
 function OnGUI () 
 {
     var buttonSwitchedIndex : int = -1;

     // Process all button settings
     for(var b=0; b<buttonAction.Length; b++)
     {
             // Draw button with current settings. Check if a button with current settings was click. 
         if ( GUI.Button(buttonAction[b].areaOnScreen, buttonAction[b].name) )
         {
                     // Show 3D object
             buttonAction[b].renderer.enabled = true;
                     // Remember the place in array of the pressed button
             buttonSwitchedIndex = b;
         }
     }
     
     // Shutdown the rest of the buttons
     if ( buttonSwitchedIndex > -1 )
     {
         for(b=0; b<buttonAction.Length; b++)
         {
                     // Unless this is the 3D button we showed, hide button
             if ( buttonSwitchedIndex != b )
                 buttonAction[b].renderer.enabled  = false;
         }
     }
 }

Attach it to a new game object.
You have a list of "Button Action" - set it to "3" as you have 3 button.
Set the name of each of the buttons as you wish to appear on the button label.
Into the "renderer" field - drag the obrect corresponding to that button, e.g. to the "Blue" drag the object "Sphere-Blue".
"Area On Screen" is the rect you set to place the GUI button.

Now, clicking on the gui button should do the trick.

Renderer is the component that draws a 3D object in your game.

Controlling visibility of several objects with GUI

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