How to end the game once collectable variable achieved?

Question

Working on a school assignment where the player collects boxes and the number collected is displayed on the screen. The thing I'm running into is ending or restarting the level once the player collects "X" amounts of boxes.

Here is the CollectableObjectMaster script

 using UnityEngine;
 using System.Collections;
 
 /// <summary>
 /// Keeps track of your Collectables count & displays the count on the screen
 /// </summary>
 public class CollectableObjectMaster : MonoBehaviour 
 {
     #region Singleton
     //This is a singleton, it makes sure we always have a CollectableObjectMaster.
     private static CollectableObjectMaster collectableObjectMasterInstance = null;
 
     public static CollectableObjectMaster instance
     {
         get
         {
             if (collectableObjectMasterInstance == null)
             {
                 collectableObjectMasterInstance = FindObjectOfType(typeof(CollectableObjectMaster)) as CollectableObjectMaster;
             }
 
             if (collectableObjectMasterInstance == null)//If we didn't find a CollectableObjectMaster, make one
             {
                 GameObject newObj = new GameObject("CollectableObjectMaster");
                 collectableObjectMasterInstance = newObj.AddComponent(typeof(CollectableObjectMaster)) as CollectableObjectMaster;
                 Debug.Log("Could not find CollectableObjectMaster, so I made one");
             }
 
             return collectableObjectMasterInstance;
         }
     }
     #endregion
     
     #region Members
     [UnityEngine.SerializeField]//This allows us to inspect private members in the inspector
     private int collectablesCount;//How many collectables we have
     
     public GUIStyle collectableCountDisplayStyle;
     
     public string nameOfCollectable = "Collectable";
     #endregion
     
     #region Properties    
     public int CollectablesCount
     {
         get { return this.collectablesCount;}
         set { this.collectablesCount = value;}
     }
     #endregion
     
     
     #region Methods
     public void OnGUI()
     {        
         GUILayout.BeginArea(new Rect(0,0,Screen.width, Screen.height));
         {
             GUILayout.BeginVertical();
                 GUILayout.Space(10f);//A little buffer room ;)
                 GUILayout.BeginHorizontal();
                 {
                     GUILayout.FlexibleSpace();
                         this.DrawCollectableCount();
                     GUILayout.FlexibleSpace();
                 }
                 GUILayout.EndHorizontal();
                 GUILayout.FlexibleSpace();
             GUILayout.EndVertical();
         }
         GUILayout.EndArea();
     }
     
     private void DrawCollectableCount()
     {
         if(this.collectableCountDisplayStyle == null)
             GUILayout.Label(this.GetCollectableString());
         else
             GUILayout.Label(this.GetCollectableString(), this.collectableCountDisplayStyle);
     }
     
     private string GetCollectableString()
     {
         return (this.CollectablesCount.ToString() + " " + this.nameOfCollectable);
     }
     #endregion
 }

And here is the CollectableObject script

 using UnityEngine;
 using System.Collections;
 
 public class CollectableObject : MonoBehaviour 
 {
     void Start () 
     {
         this.gameObject.collider.isTrigger = true;//Make sure the box collider we are using is a trigger so we get OnTrigger messages
     }
     
     /// <summary>
     /// Raises the trigger enter event, this happens when colliders hit & one of them was a trigger
     /// </summary>
     /// <param name='objectHit'>
     /// Object hit.
     /// </param>
     public void OnTriggerEnter(Collider objectHit)
     {
         if(objectHit.CompareTag("Player"))//If we hit the player object, move it to spawn    
         {
             this.AddToCollectablesCount();
             this.KillMe();
         }
     }
 
     public void AddToCollectablesCount()
     {
         CollectableObjectMaster.instance.CollectablesCount++;
     }
     
     public void KillMe()
     {
         Destroy(this.gameObject);
     }
 
 }

Any advice?

Answer 1

Answer by aldonaletto · Oct 12, 2013 at 02:16 AM

A simple way is to compare the CollectablesCount value to the limit in Update (CollectableObjectMaster script):

 void Update(){
   if (CollectablesCount >= limit){
     // limit reached: place here the code to handle this
   }
 }

A more sophisticated (and slightly more efficient) way to solve the problem is to compare to the limit only when the CollectableCount value changes: since it's a property, doing this inside its set method ensures that the comparison will be made only when needed:

 public int CollectablesCount
 {
    get { return this.collectablesCount;}
    set { 
      this.collectablesCount = value;
      if (value >= limit){
         // limit reached: call a function that handles this case
         LimitReached();
      }
    }
 }

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