How to get objects with a specific component and store them in an array?

Unity Engine
1

So, i made this code to switch weapons, and all i’m trying to do is get how much weapons the player has, so i know how to set the array, and then, put all weapons into the array, however, how do i get the objects with the “WeaponFire” component? So that i don’t need to set the array length before running the game, because i wont always have the same number of weapons.

BTW, this is not an FPS, nor a TPS, it is a car combat game.

Code:

#pragma strict

var currentWeapon = 0;
var Weapons : WeaponFire[];

function getSelectedWeapon() : WeaponFire
    {
    return Weapons[currentWeapon];
    }


function Start()
    {
   
    if (currentWeapon >= Weapons.length) currentWeapon = Weapons.length-1;
   
    for (var i=0; i<Weapons.length; i++)
        DisableWeapon(Weapons[i]);
   
    SelectWeapon(Weapons[currentWeapon]);
    }


function Update () {
   
    if (Input.GetKeyDown(KeyCode.PageUp))
        SwitchWeapon(-1);
       
    if (Input.GetKeyDown(KeyCode.PageDown))
        SwitchWeapon(1);
}

function SwitchWeapon (iDir : int)
    {
    if (Weapons.length < 2) return;
   
    // Desactivar coche previo
   
    DisableWeapon(Weapons[currentWeapon]);
       
    // Seleccionar coche nuevo
   
    currentWeapon += Mathf.Sign(iDir);
    if (currentWeapon < 0) currentWeapon = Weapons.length-1;
    else if (currentWeapon >= Weapons.length) currentWeapon = 0;
   
    SelectWeapon(Weapons[currentWeapon]);
    }
   
   
// Desactivar el coche dado. No depende de variables globales.
   
function DisableWeapon(Weapon : WeaponFire)
    {
    Weapon.weaponSelected = false;
    }

   
// Selecciona el coche dado. Lo activa y obtiene sus componentes.

function SelectWeapon(Weapon : WeaponFire)
    {
    Weapon.weaponSelected = true;
    }
2
3

Uhm, that’s not it, i’m trying to create an array of all objects that contain a specific component, and not trying to get a component from one single object.

4

You can use
MyComponent[] myComponents = GameObject.FindObjectsOfType<MyComponent>();

It’s a slow function though, so best to only use it at load time, not every frame

5

Sorry to ask, but, how do i do that with Javascript? And, no problem being slow for this script, as it is just for switching weapons.

Any way to use that with my corrent script, or i will have to re-write all of it?

6

Unity - Scripting API: Object.FindObjectsOfType : Scripting Reference, toggle between languages using the buttons upper-right in the page

7

Thank you all guys, i’ll fiddle with this and see what i can get.

8

I ended up creating a very different setup for dynamic weapons, i simply created an empty and i attach all weapons to this empty, the script then counts how many child objects this empty has, and sets the array based on this. If anyone is having trouble with a similar issue, i’ll elave the code here:

    #pragma strict
    
    var currentWeapon = 0;
    
    function Awake(){
        SelectWeapon(0);
    }
    
    function Update(){
    var maxWeapons : int = transform.childCount - 1;
   
    if(Input.GetAxis("Mouse ScrollWheel") > 0){
        if(currentWeapon + 1 <= maxWeapons){
            currentWeapon++;
        }
        else{
            currentWeapon = 0;
        }
        SelectWeapon(currentWeapon);
    }
    else if (Input.GetAxis("Mouse ScrollWheel") < 0){
        if(currentWeapon - 1 >= 0){
            currentWeapon--;
        }
        else{
            currentWeapon = maxWeapons;
        }
        SelectWeapon(currentWeapon);
    }
   
    if(currentWeapon == maxWeapons + 1){
        currentWeapon = 0;
    }
    if(currentWeapon == -1){
        currentWeapon = maxWeapons;
    }
}

function SelectWeapon (index : int){
    for (var i = 0; i < transform.childCount; i++){

        if (i == index){
            transform.GetChild(i).gameObject.GetComponent(WeaponFire).weaponSelected = true;
        }
        else{
            transform.GetChild(i).gameObject.GetComponent(WeaponFire).weaponSelected = false;
        }
    }
}