AtomicGameEngine-Examples/NewSpaceGame/Resources/Components/Bullet.js

var game = Atomic.game;
var node = self.node;

self.isPlayer = false;

self.init = function(isPlayer, spawnPosition) {

    self.isPlayer = isPlayer;

    var laserSound = game.getSound(self.isPlayer ? "Sounds/laser01.wav" : "Sounds/laser02.wav");
    var sprite2D = node.createComponent("StaticSprite2D");

    if (self.isPlayer)
        sprite2D.sprite = game.getSprite2D("Sprites/blue_beam.png");
    else
        sprite2D.sprite = game.getSprite2D("Sprites/green_beam.png");

    sprite2D.blendMode = Atomic.BLEND_ADDALPHA;

    self.soundSource = node.createComponent("SoundSource");
    self.soundSource.soundType = Atomic.SOUND_EFFECT;
    self.soundSource.gain = 0.75;
    self.soundSource.play(laserSound);

    node.position2D = spawnPosition;

    if (!self.isPlayer) {
        node.roll(180);
    }

}

function start() {


}

function updateEnemyBullet() {

    var bpos = node.position2D;

    // off the bottom of the screen
    if (bpos[1] < -SpaceGame.halfHeight) {
        return true;
    }

    if (SpaceGame.player) {

        var epos = SpaceGame.player.node.worldPosition2D;

        if (Math.abs(epos[0] - bpos[0]) < 0.25 &&
            Math.abs(epos[1] - bpos[1]) < 0.25) {

            SpaceGame.player.onHit();

            return true;
        }

    }

}

function updatePlayerBullet() {

    var bpos = node.position2D;

    // off the top of the screen
    if (bpos[1] > SpaceGame.halfHeight) {
        return true;
    }

    for (var i = 0; i < SpaceGame.enemies.length; i++) {

        var enemy = SpaceGame.enemies[i];

        var epos = enemy.node.worldPosition2D;

        if (Math.abs(epos[0] - bpos[0]) < 0.25 &&
            Math.abs(epos[1] - bpos[1]) < 0.25) {

            enemy.onHit();

            return true;
        }

    }

    if (SpaceGame.capitalShip) {

        var epos = SpaceGame.capitalShip.node.worldPosition2D;

        if (Math.abs(epos[0] - bpos[0]) < 0.75 &&
            Math.abs(epos[1] - bpos[1]) < 0.75) {

            SpaceGame.capitalShip.onHit(bpos);

            return true;
        }

    }

}

function update(timeStep) {

    var speed = self.isPlayer ? 8 : 5;
    speed *= timeStep;
    node.translate2D([0, speed]);

    if (self.isPlayer) {
        if (updatePlayerBullet()) {
            Atomic.destroy(node);
        }
    } else {
        if (updateEnemyBullet()) {
            Atomic.destroy(node);
        }
    }


}