/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); /**** * Classes ****/ // Bullet class var Bullet = Container.expand(function () { var self = Container.call(this); var bulletSprite = self.attachAsset('bullet', { anchorX: 0.5, anchorY: 0.5 }); // Velocity components self.vx = 0; self.vy = -22; // Set direction and speed self.setDirection = function (dx, dy, speed) { var len = Math.sqrt(dx * dx + dy * dy); if (len === 0) { self.vx = 0; self.vy = -Math.abs(speed); } else { self.vx = dx / len * speed; self.vy = dy / len * speed; } // Rotate bullet to face direction self.rotation = Math.atan2(self.vy, self.vx) + Math.PI / 2; }; // Default: straight up self.setDirection(0, -1, 22); self.update = function () { self.x += self.vx; self.y += self.vy; }; return self; }); // Powerup class var Powerup = Container.expand(function () { var self = Container.call(this); var powerupSprite = self.attachAsset('powerup', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 7; self.update = function () { self.y += self.speed; }; return self; }); // Survivor class var Survivor = Container.expand(function () { var self = Container.call(this); var survivorSprite = self.attachAsset('survivor', { anchorX: 0.5, anchorY: 0.5 }); // For powerup effect self.isPowered = false; self.powerTimer = 0; // For future: add more survivor logic here return self; }); // Zombie class var Zombie = Container.expand(function () { var self = Container.call(this); var zombieSprite = self.attachAsset('zombie', { anchorX: 0.5, anchorY: 0.5 }); // Movement speed (pixels per frame) -- REDUCED for slower zombies self.speed = 1.2 + Math.random() * 0.7; // Sway amplitude and frequency for zigzag (not used anymore, but kept for possible future use) self.swayAmp = 60 + Math.random() * 80; self.swayFreq = 0.005 + Math.random() * 0.003; self.baseX = 0; self.t = 0; // For tracking last position for offscreen detection self.lastY = undefined; // For tracking intersection with bullets self.lastIntersecting = false; // For tracking intersection with survivor self.lastTouchSurvivor = false; // For powerup drop self.hasDroppedPowerup = false; // New: spawnType and movement toward play area self.spawnType = "top"; // "top", "left", "right" self.targetX = 2048 / 2; self.targetY = 2732 - 400; // play area center-ish self.initSpawn = function (type, x, y, targetX, targetY) { self.spawnType = type; self.x = x; self.y = y; self.targetX = targetX; self.targetY = targetY; self.baseX = x; // Calculate direction vector for left/right spawn if (type === "left" || type === "right") { var dx = targetX - x; var dy = targetY - y; var len = Math.sqrt(dx * dx + dy * dy); self.dirX = dx / len; self.dirY = dy / len; } }; self.update = function () { self.t += 1; // Always move directly toward survivor if (typeof survivor !== "undefined") { var dx = survivor.x - self.x; var dy = survivor.y - self.y; var dist = Math.sqrt(dx * dx + dy * dy); if (dist > 0) { self.x += dx / dist * self.speed; self.y += dy / dist * self.speed; } // Rotate zombie to face survivor self.rotation = Math.atan2(dy, dx); } }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x181818 }); /**** * Game Code ****/ // Music (not played in MVP as per instructions, but asset is here for future) // Sound for zombie hit // Sound for powerup // Sound for shooting // Powerup asset: a magenta ellipse // Bullet asset: a yellow box // Zombie asset: a green ellipse // Survivor (player) asset: a blue box // Survivor instance var survivor = new Survivor(); game.addChild(survivor); // Place survivor in the middle of the screen survivor.x = 2048 / 2; survivor.y = 2732 / 2; // Arrays for game objects var zombies = []; var bullets = []; var powerups = []; // Score display var scoreTxt = new Text2('0', { size: 120, fill: "#fff" }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); // Health bar variables and UI var survivorMaxHealth = 5; var survivorHealth = survivorMaxHealth; var healthBarWidth = 400; var healthBarHeight = 36; var healthBarBg = LK.getAsset('healthbar_bg', { width: healthBarWidth, height: healthBarHeight, color: 0x333333, shape: 'box', anchorX: 0.5, anchorY: 0 }); var healthBarFg = LK.getAsset('healthbar_fg', { width: healthBarWidth, height: healthBarHeight, color: 0x4de14d, shape: 'box', anchorX: 0.5, anchorY: 0 }); healthBarBg.y = 120; healthBarFg.y = 120; healthBarBg.x = 2048 / 2; healthBarFg.x = 2048 / 2; LK.gui.top.addChild(healthBarBg); LK.gui.top.addChild(healthBarFg); // Powerup timer display var powerupTxt = new Text2('', { size: 70, fill: 0xFF3FD6 }); powerupTxt.anchor.set(0.5, 0); LK.gui.top.addChild(powerupTxt); powerupTxt.y = 170; // Game state var dragNode = null; var canShoot = true; var shootCooldown = 0; var shootInterval = 12; // frames between shots var zombieSpawnTimer = 0; var zombieSpawnInterval = 60; // frames between spawns, will decrease var zombieSpeedIncrease = 0; var powerupActive = false; var powerupTimer = 0; var powerupDuration = 360; // frames (6 seconds) var lastGameOver = false; // Helper: spawn a zombie function spawnZombie() { var z = new Zombie(); // Randomly choose spawn edge: 0=top, 1=left, 2=right var edge = Math.floor(Math.random() * 3); var margin = 120; var spawnType, zx, zy, tx, ty; tx = 2048 / 2; ty = 2732 - 400; if (edge === 0) { // Top spawnType = "top"; zx = margin + Math.random() * (2048 - 2 * margin); zy = -100; } else if (edge === 1) { // Left spawnType = "left"; zx = -100; zy = 300 + Math.random() * (2732 - 800); } else { // Right spawnType = "right"; zx = 2048 + 100; zy = 300 + Math.random() * (2732 - 800); } z.initSpawn(spawnType, zx, zy, tx, ty); // Increase speed as game progresses z.speed += zombieSpeedIncrease; zombies.push(z); game.addChild(z); } // Helper: spawn a powerup at (x, y) function spawnPowerup(x, y) { var p = new Powerup(); p.x = x; p.y = y; powerups.push(p); game.addChild(p); } // Helper: shoot a bullet function shootBullet(targetX, targetY) { if (!canShoot) return; canShoot = false; shootCooldown = 0; var b = new Bullet(); b.x = survivor.x; b.y = survivor.y - 80; // If no target provided, shoot straight up if (typeof targetX === "number" && typeof targetY === "number") { var dx = targetX - survivor.x; var dy = targetY - (survivor.y - 80); b.setDirection(dx, dy, 22); } else { b.setDirection(0, -1, 22); } bullets.push(b); game.addChild(b); LK.getSound('shoot').play(); } // Dragging logic // (player movement removed) function handleMove(x, y, obj) { // Always rotate survivor to face the pointer (x, y) var dx = x - survivor.x; var dy = y - survivor.y; // If pointer is on the left half and in the vertical middle, rotate survivor 180 degrees if (x < 2048 / 2 && y > 2732 / 4 && y < 2732 * 3 / 4) { survivor.rotation = Math.atan2(dy, dx) + Math.PI; } else { survivor.rotation = Math.atan2(dy, dx); } } game.move = handleMove; // Tap to shoot logic game.tap = function (x, y, obj) { // Allow tap to shoot anywhere, even if dragging shootBullet(x, y); }; // For touch devices, simulate tap on quick down/up var lastDownTime = 0; game.down = function (x, y, obj) { lastDownTime = Date.now(); }; game.up = function (x, y, obj) { // If quick tap, treat as tap to shoot if (Date.now() - lastDownTime < 250) { shootBullet(x, y); } }; // Main update loop game.update = function () { // Handle survivor powerup timer if (powerupActive) { powerupTimer--; if (powerupTimer <= 0) { powerupActive = false; survivor.isPowered = false; powerupTxt.setText(''); // Visual: scale back to normal tween(survivor, { scaleX: 1, scaleY: 1 }, { duration: 200, easing: tween.easeOut }); } else { powerupTxt.setText('POWER! ' + Math.ceil(powerupTimer / 60)); } } // Shooting cooldown if (!canShoot) { shootCooldown++; if (shootCooldown >= (powerupActive ? 4 : shootInterval)) { canShoot = true; } } // Spawn zombies zombieSpawnTimer++; if (zombieSpawnTimer >= zombieSpawnInterval) { spawnZombie(); zombieSpawnTimer = 0; // Increase difficulty over time if (zombieSpawnInterval > 24) zombieSpawnInterval -= 1; zombieSpeedIncrease += 0.01; } // Update bullets for (var i = bullets.length - 1; i >= 0; i--) { var b = bullets[i]; b.update(); // Remove if offscreen if (b.y < -100) { b.destroy(); bullets.splice(i, 1); continue; } // Check collision with zombies for (var j = zombies.length - 1; j >= 0; j--) { var z = zombies[j]; if (b.intersects(z)) { // Hit! LK.getSound('zombiehit').play(); // Score LK.setScore(LK.getScore() + 1); scoreTxt.setText(LK.getScore()); // Powerup drop chance if (!z.hasDroppedPowerup && Math.random() < 0.08) { spawnPowerup(z.x, z.y); z.hasDroppedPowerup = true; } // Visual: flash zombie LK.effects.flashObject(z, 0xffffff, 200); // Remove both z.destroy(); zombies.splice(j, 1); b.destroy(); bullets.splice(i, 1); break; } } } // Update zombies for (var i = zombies.length - 1; i >= 0; i--) { var z = zombies[i]; z.update(); // Remove if offscreen (bottom) if (z.y > 2732 + 100) { z.destroy(); zombies.splice(i, 1); continue; } // Check collision with survivor if (z.intersects(survivor)) { // Only damage once per collision if (!z.lastTouchSurvivor) { survivorHealth--; // Animate health bar var healthFrac = Math.max(0, survivorHealth) / survivorMaxHealth; healthBarFg.width = healthBarWidth * healthFrac; LK.effects.flashObject(survivor, 0xff0000, 200); if (survivorHealth <= 0 && !lastGameOver) { LK.effects.flashScreen(0xff0000, 1000); lastGameOver = true; LK.showGameOver(); return; } } z.lastTouchSurvivor = true; } else { z.lastTouchSurvivor = false; } } // Update powerups for (var i = powerups.length - 1; i >= 0; i--) { var p = powerups[i]; p.update(); // Remove if offscreen if (p.y > 2732 + 100) { p.destroy(); powerups.splice(i, 1); continue; } // Check collision with survivor if (p.intersects(survivor)) { LK.getSound('powerup').play(); // Activate powerup: rapid fire powerupActive = true; powerupTimer = powerupDuration; survivor.isPowered = true; // Visual: scale up tween(survivor, { scaleX: 1.3, scaleY: 1.3 }, { duration: 200, easing: tween.easeOut }); powerupTxt.setText('POWER! ' + Math.ceil(powerupTimer / 60)); p.destroy(); powerups.splice(i, 1); continue; } } }; // Reset game state on restart LK.on('gameStart', function () { // Remove all zombies, bullets, powerups for (var i = 0; i < zombies.length; i++) zombies[i].destroy(); for (var i = 0; i < bullets.length; i++) bullets[i].destroy(); for (var i = 0; i < powerups.length; i++) powerups[i].destroy(); zombies = []; bullets = []; powerups = []; // Reset survivor survivor.x = 2048 / 2; survivor.y = 2732 / 2; survivor.isPowered = false; survivor.scaleX = 1; survivor.scaleY = 1; survivorHealth = survivorMaxHealth; healthBarFg.width = healthBarWidth; // Reset timers and state canShoot = true; shootCooldown = 0; zombieSpawnTimer = 0; zombieSpawnInterval = 60; zombieSpeedIncrease = 0; powerupActive = false; powerupTimer = 0; powerupTxt.setText(''); lastGameOver = false; LK.setScore(0); scoreTxt.setText('0'); });