/**** * Classes ****/ // Enemy class var Enemy = Container.expand(function () { var self = Container.call(this); var enemyGraphics = self.attachAsset('enemy', { anchorX: 0.5, anchorY: 0.5 }); self.update = function () { // Move the enemy in its current direction self.x += Math.cos(self.direction) * self.speed; self.y += Math.sin(self.direction) * self.speed; // Wrap around the screen if the enemy moves off the screen if (self.x < 0) { self.x += 2048; } else if (self.x > 2048) { self.x -= 2048; } if (self.y < 0) { self.y += 2732; } else if (self.y > 2732) { self.y -= 2732; } // Check for collision with other enemies for (var i = 0; i < enemies.length; i++) { if (enemies[i] !== self && self.intersects(enemies[i])) { // Calculate the angle of the collision var angle = Math.atan2(enemies[i].y - self.y, enemies[i].x - self.x); // Reverse the direction of the enemy self.direction = angle + Math.PI; // Push the enemy away from the other enemy self.x += Math.cos(self.direction) * self.speed; self.y += Math.sin(self.direction) * self.speed; } } }; }); // Explosion Fragment class var ExplosionFragment = Container.expand(function () { var self = Container.call(this); var fragmentGraphics = self.attachAsset('fragment', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 5; self.update = function () { self.x += Math.cos(self.direction) * self.speed; self.y += Math.sin(self.direction) * self.speed; self.speed *= 0.99; if (self.speed < 0.1) { var index = explosions.indexOf(self); if (index > -1) { explosions.splice(index, 1); } // Spawn particles when the fragment is removed for (var i = 0; i < 10; i++) { var particle = new Particle(); particle.x = self.x; particle.y = self.y; // Set the direction of each particle to form a perfect circle particle.direction = i * (Math.PI / 4); game.addChild(particle); } // Play fragment explosion sound LK.getSound('fragmentExplosion').play(); self.destroy(); } else if (self.x < 0 || self.x > 2048 || self.y < 0 || self.y > 2732) { var index = explosions.indexOf(self); if (index > -1) { explosions.splice(index, 1); } // Play fragment explosion sound LK.getSound('fragmentExplosion').play(); self.destroy(); } }; }); // // Particle class var Particle = Container.expand(function () { var self = Container.call(this); var particleGraphics = self.attachAsset('particle', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 2; self.update = function () { self.x += Math.cos(self.direction) * self.speed; self.y += Math.sin(self.direction) * self.speed; self.alpha -= 0.01; if (self.alpha <= 0) { self.destroy(); } }; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x000000 //Init game with black background }); /**** * Game Code ****/ LK.playMusic('backgroundMusic'); var background = game.attachAsset('background', { anchorX: 0.5, anchorY: 0.5, x: 2048 / 2, y: 2732 / 2, alpha: 0.3 }); // Initialize three fragment images to represent the attempts left var attemptsImages = []; for (var i = 0; i < 3; i++) { var attemptImage = LK.getAsset('fragment', { anchorX: 1.0, anchorY: 0.0, x: -(i + 1) * 100, y: 0, rotation: -Math.PI / 4 // Rotate 45 degrees anticlockwise }); attemptsImages.push(attemptImage); LK.gui.topRight.addChild(attemptImage); } // Initialize arrays and variables var explosions = []; var enemies = []; var level = 1; var enemySize = 100; var attempts = 3; var score = 0; // Initialize score text var scoreTxt = new Text2('0', { size: 150, fill: "#ffffff" }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); // Function to create an explosion function createExplosion(x, y) { // Create eight explosion fragments for (var i = 0; i < 8; i++) { var fragment = new ExplosionFragment(); fragment.x = x; fragment.y = y; // Set the direction of each fragment to form a perfect circle fragment.direction = i * (Math.PI / 4); fragment.rotation = fragment.direction; // Shrink the fragments as the targets shrink fragment.scale.set(enemySize / 100, enemySize / 100); explosions.push(fragment); game.addChild(fragment); } // Play the explosion sound LK.getSound('explosion').play(); } // Function to create an enemy function createEnemy(x, y) { var enemy = new Enemy(); enemy.x = x; enemy.y = y; // Assign a random direction and speed to the enemy enemy.direction = Math.random() * Math.PI * 2; enemy.speed = Math.random() * 5 + 1; // Set the size of the enemy based on the enemySize variable enemy.scale.set(enemySize * 2 / 200, enemySize * 2 / 200); enemies.push(enemy); game.addChild(enemy); } // Handle screen press to create an explosion game.down = function (x, y, obj) { if (attempts > 0) { createExplosion(x, y); attempts--; // Update the display of attempts left attemptsImages[attempts].visible = false; } }; // Update function called every game tick game.update = function () { // Update explosions for (var i = explosions.length - 1; i >= 0; i--) { if (explosions[i]) { explosions[i].update(); if (explosions[i] && explosions[i].radius > 200) { explosions.splice(i, 1); } } } // Check for collisions between explosions and enemies for (var j = enemies.length - 1; j >= 0; j--) { for (var k = explosions.length - 1; k >= 0; k--) { if (enemies[j].intersects(explosions[k])) { createExplosion(enemies[j].x, enemies[j].y); enemies[j].destroy(); enemies.splice(j, 1); // Increase score and update score text score++; scoreTxt.setText(score); if (explosions[k] instanceof ExplosionFragment) { explosions[k].destroy(); explosions.splice(k, 1); } break; } } } // Start a new level when all enemies are destroyed if (enemies.length == 0) { level++; enemySize *= 0.9; attempts = 3; // Reset the display of attempts left for (var i = 0; i < 3; i++) { attemptsImages[i].visible = true; } // Remove all fragments for (var i = explosions.length - 1; i >= 0; i--) { if (explosions[i] instanceof ExplosionFragment) { explosions[i].destroy(); explosions.splice(i, 1); } } // Flash the screen white LK.effects.flashScreen(0xffffff, 1000); // Scale down the background only if it's larger than 33% if (background.scale.x > 0.33 && background.scale.y > 0.33) { background.scale.x *= 0.9; background.scale.y *= 0.9; } // Create new enemies for (var i = 0; i < level * 2 + 1; i++) { createEnemy(Math.random() * 2048, Math.random() * 2732); } } else if (enemies.length > 0 && explosions.length == 0 && attempts == 0) { // If there are still enemies, no fragments left on the screen and no more attempts at creating an explosion, call game over LK.showGameOver(); } }; // Create initial enemies createEnemy(500, 500); createEnemy(1000, 1000); createEnemy(1500, 1500);

Chain Reaction Game (Stream #3) by Benjaminsen

Images

Sounds