var Snowflake = Container.expand(function () { var self = Container.call(this); var snowflakeGraphics = self.createAsset('snowflake', 'Snowflake', .5, .5); snowflakeGraphics.width = 10; snowflakeGraphics.height = 10; self.speed = Math.random() * 4 + 2; self.move = function () { self.y += self.speed; self.x += Math.sin(self.y / 100) * 5; if (self.y > 2800) { self.y = -10; } }; }); var FloorTile = Container.expand(function () { var self = Container.call(this); var floorTileGraphics = self.createAsset('floorTile', 'Floor Tile', 0.5, 0.5); }); var IceBlock = Container.expand(function () { var self = Container.call(this); var iceBlockGraphics = self.createAsset('iceBlock', 'Ice Block', .5, .5); }); var Powerup = Container.expand(function () { var self = Container.call(this); var powerupGraphics = self.createAsset('arrowDown', 'Powerup Chest', .5, .5); self.width *= 2; self.height *= 2; self.timer = 0; self.blinking = false; self.update = function () { self.timer += 1; if (self.timer > 240) { self.blinking = true; } if (self.blinking) { powerupGraphics.alpha = 0.5 + 0.5 * Math.sin(self.timer / 10); } }; }); var Player = Container.expand(function () { var self = Container.call(this); var playerGraphics = self.createAsset('player', 'Player character', .5, .5); self.velocity = { x: 0, y: 0 }; self.speed = 15; self.shoot = function () { for (var i = 0; i < 16; i++) { var bullet = new Bullet(); bullet.x = self.x; bullet.y = self.y; var angle = Math.PI * 2 / 16 * i; bullet.direction.x = Math.cos(angle); bullet.direction.y = Math.sin(angle); bullets.push(bullet); self.addChild(bullet); } }; self.moveTowards = function (pos) { var dx = pos.x - self.x; var dy = pos.y - self.y; var magnitude = Math.sqrt(dx * dx + dy * dy); self.velocity.x += dx * self.speed / magnitude; self.velocity.y += dy * self.speed / magnitude; }; self.moveAwayFrom = function (pos) { var dx = pos.x - self.x; var dy = pos.y - self.y; var magnitude = Math.sqrt(dx * dx + dy * dy); self.velocity.x -= dx * self.speed / magnitude; self.velocity.y -= dy * self.speed / magnitude; }; self.move = function () { self.x += self.velocity.x; self.y += self.velocity.y; self.velocity.x *= 0.95; self.velocity.y *= 0.95; }; }); var Bullet = Container.expand(function () { var self = Container.call(this); var bulletGraphics = self.createAsset('bullet', 'Bullet', .5, .5); self.direction = { x: 0, y: 0 }; self.speed = 10; self.width *= 0.5; self.height *= 0.5; self.move = function () { self.x += self.direction.x * self.speed; self.y += self.direction.y * self.speed; }; }); var SnowManEnemy = Container.expand(function () { var self = Container.call(this); var enemyGraphics = self.createAsset('arrowUp', 'SnowManEnemy Character', .5, .5); self.width *= 2; self.height *= 2; self.speed = 2 + Math.random() * 0.5; self.move = function (player) { var dx = player.x - self.x; var dy = player.y - self.y; var magnitude = Math.sqrt(dx * dx + dy * dy); self.x += dx * self.speed / magnitude; self.y += dy * self.speed / magnitude; }; }); var Game = Container.expand(function () { var self = Container.call(this); var iceBlocks = []; var blockSize = 200; var worldWidth = blockSize * 11; var worldHeight = blockSize * 15; console.log('Game world size:', worldWidth, 'x', worldHeight); console.log('LK.stageContainer.height:', LK.stageContainer.height); for (var i = 0; i < worldWidth / blockSize; i++) { for (var j = 0; j < worldHeight / blockSize; j++) { if (i === 0 || i === worldWidth / blockSize - 1 || j === 0 || j === worldHeight / blockSize - 1) { var iceBlock = new IceBlock(); iceBlock.x = i * blockSize; iceBlock.y = j * blockSize; self.addChild(iceBlock); } else { if (true) { var floorTile = new FloorTile(); floorTile.x = i * blockSize; floorTile.y = j * blockSize; self.addChild(floorTile); } } } } var player = self.addChild(new Player()); var scoreLabel = new Text2('Score: 0', { size: 60, fill: '#113355', align: 'left' }); scoreLabel.x = worldWidth - 560; scoreLabel.y = 160; scoreLabel.anchor.set(0.5, 0.5); self.addChild(scoreLabel); var playerScore = 0; var instructions = new Text2('Tap to move and throw\nsnowballs at the evil snowmen', { size: 100, fill: '#446688', align: 'center', dropShadow: true }); instructions.x = worldWidth / 2 - 100; instructions.y = worldHeight / 2 + 340; instructions.anchor.set(0.5, 0.5); self.addChild(instructions); var playButton = self.createAsset('playButton', 'Play Button', .5, .5); playButton.x = worldWidth / 2 - 100; playButton.y = worldHeight / 2; playButton.width = 400; playButton.height = 400; playButton.on('down', function () { instructions.visible = false; playButton.visible = false; LK.emit('playButtonPressed'); }); var bullets = []; var enemies = []; var powerups = []; var enemySpawnInterval; var bulletInterval; var updateSpawnSpeedInterval; var initialSpawnSpeed = 2000; var spawnSpeedNow = initialSpawnSpeed; var powerupSpawnInterval; spawnPowerup = function () { var powerup = new Powerup(); do { var xx = Math.random() * worldWidth; var yy = Math.random() * worldHeight; var dx = xx - player.x; var dy = yy - player.y; var magnitude = Math.sqrt(dx * dx + dy * dy); } while (magnitude < 800); powerup.x = xx; powerup.y = yy; powerups.push(powerup); self.addChild(powerup); }; spawnEnemy = function () { var snowManEnemy = new SnowManEnemy(); do { var xx = Math.random() * worldWidth; var yy = Math.random() * worldHeight; var dx = xx - player.x; var dy = yy - player.y; var magnitude = Math.sqrt(dx * dx + dy * dy); } while (magnitude < 500); snowManEnemy.x = xx; snowManEnemy.y = yy; enemies.push(snowManEnemy); self.addChild(snowManEnemy); }; triggerBomb = function () { for (var i = 0; i < 16; i++) { var bullet = new Bullet(); bullet.x = player.x; bullet.y = player.y; var angle = Math.PI * 2 / 16 * i; bullet.direction.x = Math.cos(angle); bullet.direction.y = Math.sin(angle); bullets.push(bullet); self.addChild(bullet); } }; var gameStarted = false; LK.on('playButtonPressed', function () { gameStarted = true; updateSpawnSpeedInterval = LK.setInterval(function () { if (spawnSpeedNow > 200) { spawnSpeedNow -= 100; LK.clearInterval(enemySpawnInterval); enemySpawnInterval = LK.setInterval(function () { spawnEnemy(); }, spawnSpeedNow); } }, 10000); enemySpawnInterval = LK.setInterval(function () { spawnEnemy(); }, initialSpawnSpeed); bulletInterval = LK.setInterval(function () { var bullet = new Bullet(); bullet.x = player.x; bullet.y = player.y; var pos = { x: 0, y: 0 }; pos = lastTapPos; var dx = pos.x - player.x; var dy = pos.y - player.y; var magnitude = Math.sqrt(dx * dx + dy * dy); bullet.direction.x = dx / magnitude; bullet.direction.y = dy / magnitude; bullets.push(bullet); self.addChild(bullet); }, 2000); powerupSpawnInterval = LK.setInterval(function () { spawnPowerup(); }, 12000); }); var snowflakes = []; for (var i = 0; i < 30; i++) { var snowflake = new Snowflake(); snowflake.x = Math.random() * 1800; snowflake.y = Math.random() * LK.stageContainer.height; snowflakes.push(snowflake); self.addChild(snowflake); } player.x = 330; player.y = 300; LK.on('tick', function () { player.move(); for (var i = 0; i < bullets.length; i++) { bullets[i].move(); if (bullets[i].x < 0 || bullets[i].x > worldWidth || bullets[i].y < 0 || bullets[i].y > worldHeight) { bullets[i].destroy(); bullets.splice(i, 1); continue; } for (var j = 0; j < enemies.length; j++) { if (bullets[i].intersects(enemies[j])) { enemies[j].destroy(); playerScore += 100; scoreLabel.setText("Score: " + playerScore); enemies.splice(j, 1); break; } } } for (var i = 0; i < enemies.length; i++) { enemies[i].move(player); if (player.intersects(enemies[i])) { LK.showGameOver(); } } for (var i = 0; i < snowflakes.length; i++) { snowflakes[i].move(); } for (var i = 0; i < powerups.length; i++) { powerups[i].update(); if (powerups[i].timer > 480) { powerups[i].destroy(); powerups.splice(i, 1); } else { if (player.intersects(powerups[i])) { triggerBomb(); powerups[i].destroy(); powerups.splice(i, 1); } } } }); var lastTapPos = { x: 0, y: 0 }; stage.on('down', function (obj) { if (gameStarted) { var pos = obj.event.getLocalPosition(self); lastTapPos = pos; player.moveTowards(pos); } }); });

Penguin Snowball Fight by cspark

Images