Help with returning an Array.

Hi,

I want this script to return all enemies within a certain distance, but it doesn't return an array, can anyone help me with this.

Code (CSharp):

1.     public Transform[] Target(float maxDistance ){
2.        
3.         foreach(GameObject Vehicule in GameObject.FindGameObjectsWithTag("MissileTarget")){
4.            
5.             //Find target distance.
6.             Vector3 relativePosition = Vehicule.transform.position - ThePlayer.transform.position;
7.            
8.             if (relativePosition.magnitude < maxDistance){
9.                
10.                 return Vehicule.transform;
11.             }
12.         }
13.        
14.         return null;
15.     }

Thank you.

 

Your script currently returns null or transform. But the expect return of the function is transform array (Transform[]).

It's probably best, because you need a dynamic array, to use an ArrayList here.

Code (CSharp):

1.     public ArrayList<Transform> Target(float maxDistance ){
2.  
3.         ArrayList<Transform> arr = new ArrayList<Transform>();
4.  
5.         foreach(GameObject Vehicule in GameObject.FindGameObjectsWithTag("MissileTarget")){
6.          
7.             //Find target distance.
8.             Vector3 relativePosition = Vehicule.transform.position - ThePlayer.transform.position;
9.          
10.             if (relativePosition.magnitude < maxDistance){
11.              
12.                 arr.Add (Vehicule.transform);
13.             }
14.         }
15.      
16.         return arr;
17.     }

 

I don't know often you are going to call this function, but it might be worth mentioning that the following call is not "fast".

 

Thanks for the input.

 

You could use a List, basically a fancy array.

Add "using System.Collections.Generic" to the top of your script, then do

Code (CSharp):

1. List<Transform> tL = new list<Transform>();
2. tL.Add(this.transform); //example
3. return tL.ToArray();
4.  
5.  

 

Arraylist is completely obsolete in the face of generic list
http://wiki.unity3d.com/index.php?title=Which_Kind_Of_Array_Or_Collection_Should_I_Use?

 

Code (csharp):

1.  
2.     public Transform[] GetTransformsInRange(float radius, Vector3 position, string specificTag)
3.     {
4.         List<Transform> transformsToReturn = new List<Transform>();
5.         Collider[] cols = Physics.OverlapSphere(position, radius);
6.         for(int i = 0; i < cols.Length;i++)
7.         {
8.             if(cols[i].gameObject.CompareTag(specificTag))
9.             {
10.                 transformToReturn.Add(cols[i].transform);
11.             }
12.         }
13.         return transformsToReturn;
14.     }
15.  

if you get errors with the List, make sure you have using System.Collections.Genereic;

usage is enemyTransforms = GetTransformsInRange(3f, transform.position, "Enemy");