Show GUI on collision

Question

Hi everyone, I have a simple script here I'm having a small problem with:

 var showGUI = false;
 var launcherUpgrade1 : Texture2D;
 
 
 function OnTriggerEnter (col : Collider) {
         
 
 if(col.name == "Player" && GUI.enabled == false) {
 GUI.enabled = true;
 }
 
 if(GUI.enabled == true) {
 OnGUI();
 }
 
 else if(GUI.enabled == false) {
 
 return;
 }
 }
 
 
 function OnGUI () {
    GUI.Box (Rect (10,10,100,50), GUIContent("400", launcherUpgrade1));
 }

So basically when the player collides with the gameobject this script is attached to I want it to show the GUI. However, the GUI is automatically being shown as soon as the game starts. How can I fix this?

Answer 1

Best Answer

Answer by Waz · Aug 14, 2011 at 12:24 AM

You misunderstand GUI.enabled. It's not for that. It's for "greying out" UI elements. Try this:

 var showGUI = false;
 var launcherUpgrade1 : Texture2D;
 
 function OnTriggerEnter (col : Collider) {
     if(col.name == "Player")
         showGUI  = true;
 }
 
 function OnGUI () {
    if (showGUI) {
        GUI.Box (Rect (10,10,100,50), GUIContent("400", launcherUpgrade1));
        ... rest of the GUI ...
    }
 }

Or, if you really do want it to grey out:

 function OnGUI () {
    GUI.enabled = showGUI;
    GUI.Box (Rect (10,10,100,50), GUIContent("400", launcherUpgrade1));
 }

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ObviouslyInsane · Aug 14, 2011 at 12:34 AM 0

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Aha, now it makes sense. Thank you for clearing that up for me, it works perfectly now.

Dune · Apr 17, 2013 at 01:39 AM 0

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This was incredibly helpful. Thank you so much.

Answer 2

Answer by Ziad · Aug 14, 2011 at 12:27 AM

make a script and name it

GUIControllerScript.cs

 using UnityEngine;

using System.Collections;

public class GUIControllerScript : MonoBehaviour {

 public bool ShowGUI = false;

 void Start () 
 
 {
 
 }
 
 void Update () 
 {
     if (ShowGUI)
     {
         G_U_I.Instance.enabled = true;
     }
     if (!ShowGUI)
     {
         G_U_I.Instance.enabled = false;
     }
 }

 void OnTriggerEnter(Collider col)
 {
     if (col.name == "Player")
     {
         ShowGUI = true;
     }
 }

}

and this one name it

G_U_I.cs

 using UnityEngine;

using System.Collections;

public class G_U_I : MonoBehaviour { public static G_U_I Instance;

 void Start () 
 {
     Instance = this;
 }
 
 void Update () 
 {
 
 }


 void OnGUI()
 {
     //Put ur GUI Script here
 }

}

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Waz · Aug 14, 2011 at 02:13 AM 0

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Conceptually, this approach has the advantage that the OnGUI call is avoided by disabling the object completely. Your actual implementation though does that at the expense of having another Update() every frame, which negates that benefit. Conceptually though, it is correct.

Show GUI on collision

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