File size: 3,271 Bytes
1c9fd5a |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 |
const canvas = document.getElementById('gameCanvas');
const ctx = canvas.getContext('2d');
canvas.width = 800;
canvas.height = 600;
let spaceship;
let bullets = [];
let enemies = [];
let gameOver = false;
function startGame() {
spaceship = new Spaceship();
bullets = [];
enemies = [];
gameOver = false;
document.getElementById('gameOver').style.display = 'none';
gameLoop();
}
class Spaceship {
constructor() {
this.width = 50;
this.height = 50;
this.x = canvas.width / 2 - this.width / 2;
this.y = canvas.height - this.height - 10;
this.speed = 5;
this.image = new Image();
this.image.src = 'https://via.placeholder.com/50'; // Add spaceship image URL here
}
move(direction) {
if (direction === 'left' && this.x > 0) {
this.x -= this.speed;
} else if (direction === 'right' && this.x + this.width < canvas.width) {
this.x += this.speed;
}
}
draw() {
ctx.drawImage(this.image, this.x, this.y, this.width, this.height);
}
shoot() {
const bullet = new Bullet(this.x + this.width / 2 - 5, this.y);
bullets.push(bullet);
}
}
class Bullet {
constructor(x, y) {
this.x = x;
this.y = y;
this.width = 10;
this.height = 20;
this.speed = 5;
}
move() {
this.y -= this.speed;
}
draw() {
ctx.fillStyle = '#00ff99';
ctx.fillRect(this.x, this.y, this.width, this.height);
}
}
class Enemy {
constructor() {
this.width = 50;
this.height = 50;
this.x = Math.random() * (canvas.width - this.width);
this.y = -50;
this.speed = 2;
}
move() {
this.y += this.speed;
}
draw() {
ctx.fillStyle = '#ff4444';
ctx.fillRect(this.x, this.y, this.width, this.height);
}
}
function gameLoop() {
if (gameOver) {
document.getElementById('gameOver').style.display = 'block';
return;
}
ctx.clearRect(0, 0, canvas.width, canvas.height);
spaceship.draw();
bullets.forEach((bullet, index) => {
bullet.move();
bullet.draw();
if (bullet.y < 0) {
bullets.splice(index, 1);
}
});
if (Math.random() < 0.02) {
enemies.push(new Enemy());
}
enemies.forEach((enemy, index) => {
enemy.move();
enemy.draw();
if (enemy.y > canvas.height) {
enemies.splice(index, 1);
}
bullets.forEach((bullet, bulletIndex) => {
if (
bullet.x < enemy.x + enemy.width &&
bullet.x + bullet.width > enemy.x &&
bullet.y < enemy.y + enemy.height &&
bullet.y + bullet.height > enemy.y
) {
enemies.splice(index, 1);
bullets.splice(bulletIndex, 1);
}
});
});
requestAnimationFrame(gameLoop);
}
document.addEventListener('keydown', (e) => {
if (e.key === 'ArrowLeft') {
spaceship.move('left');
} else if (e.key === 'ArrowRight') {
spaceship.move('right');
} else if (e.key === ' ') {
spaceship.shoot();
}
});
startGame(); |