var ship;

var bullets = [];

var aliens = [];

var settings;

​

var imgs = [];

function preload() {

  imgs.push(loadImage('img/ship.png'));

  imgs.push(loadImage('img/alien0.png'));

  imgs.push(loadImage('img/alien1.png'));

  imgs.push(loadImage('img/alien2.png'));

}

​

function setup() {

  width = window.innerWidth;

  height = window.innerHeight;

  var alienC = floor(width/60);

​

  createCanvas(width, height);

  noStroke();

​

  setInterval(function() {

    var ax = random(50, width-50);

    var ay = -40;

    aliens.push(new Alien(ax, ay));

  }, 1000);

​

  setInterval(function() {

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

      if (keys[i] == "ArrowUp" || keys[i] == 'w') {

        bullets.push(new Bullet());

      }

    }

  }, 80);

​

  settings = new Settings();

  ship = new Ship();

}

​

function draw() {

  background(0);

  ship.show();

  ship.update();

​

  for (var i = bullets.length-1; i >= 0; i--) {

    var yp = bullets[i].y;

    if (yp <= 0) {

      bullets.splice(i, 1);

    }

  }

​

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

    aliens[i].show();

    aliens[i].update();

    aliens[i].checkCollision();

  }

​

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

    bullets[i].show(ship.x, ship.y);

    bullets[i].update();

​

    for (var j = 0; j < aliens.length; j++) {

      bullets[i].checkCollision(bullets[i]);

    }

  }

​

  // settings.popup();

}

​

function keyPressed() {

  if (keyIsPressed) {

    keys.push(key);

  }

}

​

function keyReleased() {

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

    keys.splice(key[i], 1);

  }

}

​