var Star = Container.expand(function () { var self = Container.call(this); var starGraphics = self.createAsset('star', 'Background star', .5, .5); self.move = function () { self.y += 1; if (self.y > 2732) self.y = 0; }; }); var Explosion = Container.expand(function () { var self = Container.call(this); self.isActive = false; self.start = function () { self.isActive = true; var explosionAnimation = LK.getAsset('explosionAnimation', 'Explosion Animation', .5, .5); self.addChild(explosionAnimation); LK.setTimeout(function () { self.isActive = false; self.destroy(); }, 500); }; }); var Hero = Container.expand(function () { var self = Container.call(this); var heroGraphics = self.createAsset('hero', 'Hero spaceship', .5, .5); var moveDelay = 0; self.move = function (x, y) { self.x += (x - self.x) * 0.3; if (y >= 2732 * 0.6 && y <= 2732) { self.y += (y - self.y) * 0.3; } }; self.shoot = function () { var bulletSize = Math.floor(Math.random() * 3); switch (bulletSize) { case 0: return new SmallHeroBullet(self.x, self.y); case 1: return new MediumHeroBullet(self.x, self.y); default: return new LargeHeroBullet(self.x, self.y); } }; }); var SmallHeroBullet = Container.expand(function (x, y) { var self = Container.call(this); var bulletGraphics = self.createAsset('smallHeroBullet', 'Small Hero bullet', .5, .5); self.x = x; self.y = y; self.isActive = true; self.move = function () { self.y -= 20; }; LK.setTimeout(function () { self.destroy(); }, 3000); }); var MediumHeroBullet = Container.expand(function (x, y) { var self = Container.call(this); var bulletGraphics = self.createAsset('mediumHeroBullet', 'Medium Hero bullet', .5, .5); self.x = x; self.y = y; self.isActive = true; self.move = function () { self.y -= 20; }; LK.setTimeout(function () { self.destroy(); }, 3000); }); var LargeHeroBullet = Container.expand(function (x, y) { var self = Container.call(this); var bulletGraphics = self.createAsset('largeHeroBullet', 'Large Hero bullet', .5, .5); self.x = x; self.y = y; self.isActive = true; self.move = function () { self.y -= 20; }; LK.setTimeout(function () { self.destroy(); }, 3000); }); var Enemy = Container.expand(function (x, y) { var self = Container.call(this); var enemyGraphics = self.createAsset('enemy', 'Enemy spaceship', .5, .5); self.x = x; self.y = y; self.speed = 2 + Math.random(); self.move = function () { self.y += self.speed; if (self.y > 2732) self.destroy(); self.x += Math.sin(self.y / 50) * 5; }; self.shoot = function () {}; }); var EnemyBullet = Container.expand(function () { var self = Container.call(this); var bulletGraphics = self.createAsset('enemyBullet', 'Enemy bullet', .5, .5); self.move = function () {}; }); var Asteroid = Container.expand(function () { var self = Container.call(this); var size = (Math.random() * 2 + 0.5) * 1.3 * 0.6; var asteroidGraphics = self.createAsset('asteroid', 'Asteroid', size, size); asteroidGraphics.scale.set(size); self.speed = Math.random() * 5 + 1; self.direction = Math.random() * 2 - 1; self.move = function () { self.y += self.speed; self.x += self.direction; }; }); var Game = Container.expand(function () { var self = Container.call(this); var fpsCounter = new Text2('FPS: 0', { size: 50, fill: '#ffffff', font: 'Arial Bold' }); LK.gui.topLeft.addChild(fpsCounter); var scoreText = new Text2('Score: 0', { size: 50, fill: '#ffffff', font: 'Arial Bold' }); LK.gui.topLeft.addChild(scoreText); scoreText.y = fpsCounter.height; var frameCount = 0; var lastTime = Date.now(); LK.on('tick', function () { frameCount++; var currentTime = Date.now(); var deltaTime = currentTime - lastTime; if (deltaTime >= 1000) { var fps = Math.round(frameCount / deltaTime * 1000); fpsCounter.setText('FPS: ' + fps); scoreText.setText('Score: ' + score); frameCount = 0; lastTime = currentTime; } }); var score = 0; var lives = 3; var heroes = []; var heroBullets = []; var enemies = []; var enemyBullets = []; var asteroids = []; var stars = []; for (var i = 0; i < 100; i++) { var star = new Star(); star.x = Math.random() * 2048; star.y = Math.random() * 2732; self.addChild(star); stars.push(star); } var hero = self.addChild(new Hero()); hero.x = 2048 / 2; hero.y = 2732 - 200; heroes.push(hero); var heartIcon = LK.getAsset('heart', 'Heart icon', .5, .5); var heartIcons = []; for (var i = 0; i < lives; i++) { var heart = LK.getAsset('heart', 'Heart icon', .5, .5); heart.x = 2048 / 3 - lives * heart.width / 2 + i * heart.width + 100; heart.y = 50; LK.gui.topLeft.addChild(heart); heartIcons.push(heart); } stage.on('move', function (obj) { var event = obj.event; var pos = event.getLocalPosition(self); hero.move(pos.x, pos.y); }); var canShoot = true; var shooting = false; var shootInterval; stage.on('down', function (obj) { shooting = true; if (canShoot) { var bullet; bullet = hero.shoot(); bullet.x = hero.x; bullet.y = hero.y; self.addChild(bullet); heroBullets.push(bullet); canShoot = false; } shootInterval = LK.setInterval(function () { if (shooting) { var bullet; bullet = hero.shoot(); bullet.x = hero.x; bullet.y = hero.y; self.addChild(bullet); heroBullets.push(bullet); } }, 200); }); stage.on('up', function (obj) { shooting = false; LK.clearInterval(shootInterval); }); for (var i = heroBullets.length - 1; i >= 0; i--) { if (heroBullets[i].y < 0) { heroBullets[i].destroy(); heroBullets.splice(i, 1); } } var enemySpawnTimer = 0; var asteroidSpawnTimer = 0; LK.on('tick', function () { if (enemySpawnTimer++ % Math.floor(Math.random() * 400) == 0 && enemies.length < 45) { var enemyCount = Math.floor(Math.random() * 5); var enemySpacing = 2048 / (enemyCount + 1); for (var i = 0; i < enemyCount; i++) { var enemy = new Enemy((i + 1) * enemySpacing, 0); self.addChild(enemy); enemies.push(enemy); } } for (var i = enemies.length - 1; i >= 0; i--) { if (enemies[i].y > 2732) { enemies[i].destroy(); enemies.splice(i, 1); } } if (asteroidSpawnTimer++ % (Math.floor(Math.random() * 70) + 28) == 0) { var asteroid; asteroid = new Asteroid(); asteroid.x = Math.random() * 2048; asteroid.y = 0; asteroid.size = Math.random() * 1.5 + 0.5; self.addChild(asteroid); asteroids.push(asteroid); } for (var i = 0; i < enemies.length; i++) { enemies[i].move(); if (enemies[i].y >= hero.y) { LK.showGameOver(); } } for (var i = 0; i < stars.length; i++) { stars[i].move(); } for (var i = asteroids.length - 1; i >= 0; i--) { asteroids[i].move(); if (asteroids[i].y > 2732 + asteroids[i].height) { asteroids[i].destroy(); asteroids.splice(i, 1); } else if (hero.intersects(asteroids[i])) { lives--; if (heartIcons.length > 0) { var lastHeart = heartIcons.pop(); lastHeart.destroy(); } var explosion = new Explosion(); explosion.x = hero.x; explosion.y = hero.y; self.addChild(explosion); explosion.start(); if (lives <= 0) { LK.showGameOver(); } else { asteroids[i].destroy(); asteroids.splice(i, 1); } } } for (var i = heroBullets.length - 1; i >= 0; i--) { heroBullets[i].move(); if (heroBullets[i].y < 0 || heroBullets[i].y > 2732) { heroBullets[i].destroy(); heroBullets.splice(i, 1); continue; } for (var n = 0; n < enemies.length; n++) { if (heroBullets[i] && heroBullets[i].intersects(enemies[n])) { var explosion = new Explosion(); explosion.x = enemies[n].x; explosion.y = enemies[n].y; self.addChild(explosion); explosion.start(); if (enemies[n]) { enemies[n].destroy(); enemies.splice(n, 1); } heroBullets[i].destroy(); heroBullets.splice(i, 1); score += 10; scoreText.setText('Score: ' + score); break; } } } for (var i = 0; i < enemyBullets.length; i++) { enemyBullets[i].move(); } }); });