Question

I am very new to coding and i wanted to know if i could put a list of objects in an array for collision.

instead of writing… if player.hitTestObject(wall1) then wall 2 then wall 3?

can i put them all in one array or something else so i can just say if player.hitTestObject(everywall)

Thanks. my code looks like this and i have around 30 walls.

I would be very grateful if someone posted an example.

function keydown(event:KeyboardEvent) :void {

switch(event.keyCode){

    case Keyboard.LEFT :

    hero.x -= 10;

    if(hero.hitTestObject(w1) || hero.hitTestObject(w2) || hero.hitTestObject(w3) || hero.hitTestObject(w4)){
    hero.x +=10;}
    break;

    case Keyboard.RIGHT:
    hero.x +=10;
    if(hero.hitTestObject(w1) || hero.hitTestObject(w2) || hero.hitTestObject(w3) || hero.hitTestObject(w4)){
    hero.x -=10;}
    break;

    case Keyboard.UP:
    hero.y -=10;
    if(hero.hitTestObject(w1) || hero.hitTestObject(w2) ||  hero.hitTestObject(w3) || hero.hitTestObject(w4)){
    hero.y +=10;}

    break;

    case Keyboard.DOWN:
    hero.y += 10;
    if(hero.hitTestObject(w1) || hero.hitTestObject(w2) ||  hero.hitTestObject(w3) || hero.hitTestObject(w4)){
    hero.y -=10;}
    break;

    default  :
    break;
}

Answer 1

As shown in the Actionscript Docs, hitTestObject() takes a DisplayObject as a parameter, not any kind of list.

If you want, you can implement this kind of functionality yourself.

function myHitTest(obj:DisplayObject, arr:Array):Boolean {
    for (var i:int = 0; i < arr.length; ++i) {
    //for (var item:DisplayObject in arr) {
        var item:DisplayObject = arr[i]
        if (obj.hitTestObject(item)) {
            return true;
        }
    }

    return false;
}

And then you can use that…

if(myHitTest(hero,[w1,w2,w3]))
    ...

or

var everywall:Array = [w1,w2,w3];
...
if(myHitTest(hero,everywall))
    ...