AtomicGameEngine-Examples/SpaceGame/Resources/Components/SpaceGame.js

var game = Atomic.game;
var scene = game.scene;

// expose ourselves as a global
SpaceGame = self;

self.halfWidth = game.graphics.width * Atomic.PIXEL_SIZE * 0.5;
self.halfHeight = game.graphics.height * Atomic.PIXEL_SIZE * 0.5;

var enemyBaseDir = false;
var enemyBaseNode = scene.createChild("EnemyBaseNode");
var enemyBasePosX = 0;
self.enemies = [];

self.spawnBullet = function(pos, isPlayer) {

    var bulletNode = scene.createChild("Bullet");
    var bullet = bulletNode.createJSComponent("Bullet");
    bullet.init(isPlayer, pos);
}

function spawnSpace() {

    var spaceNode = scene.createChild("Space");
    spaceNode.createJSComponent("Space");

}    

function spawnEnemies()
{

    self.capitalShipNode = scene.createChild("CapitalShip");
    self.capitalShip = self.capitalShipNode.createJSComponent("CapitalShip");

    var pos = [0, 0];

    pos[1] = self.halfHeight - 2.5;

    for (var y = 0; y < 3; y++) {

        pos[0] = -4.5;

        for (var x = 0; x < 12; x++) {

            var enemyNode = enemyBaseNode.createChild("Enemy");
            enemy = enemyNode.createJSComponent("Enemy");
            enemy.spriteName = Math.random() < .85 ? "spaceship_louse" : "spaceship_scarab";
            enemy.spawnPosition = [pos[0], pos[1]];
            self.enemies.push(enemy);

            pos[0] += 0.75;

        }

        pos[1] -= 0.75;

    }

}

function updateEnemies(timeStep) {

    if (!enemyBaseDir)
        enemyBasePosX += timeStep;
    else
        enemyBasePosX -= timeStep;

    var xvalue = 2;

    if (enemyBasePosX > xvalue) {
        enemyBasePosX = xvalue;
        enemyBaseDir = !enemyBaseDir;
    }

    if (enemyBasePosX < -xvalue) {
        enemyBasePosX = -xvalue;
        enemyBaseDir = !enemyBaseDir;
    }

    enemyBaseNode.position2D = [enemyBasePosX, 0];

}


function spawnPlayer() {

    self.playerNode = scene.createChild("Player");
    self.player = self.playerNode.createJSComponent("Player");
}    


function start() {

	spawnSpace();
	spawnPlayer();    
	spawnEnemies();
}


function update(timeStep) {

    updateEnemies(timeStep);


}