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script.js
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script.js
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const canvas = document.getElementById('game');
const ctx = canvas.getContext('2d');
const groundHeight = 50;
const dinoHeight = 30;
const dinoWidth = 20;
const obstacleWidth = 20;
const obstacleHeight = 30;
const gravity = 0.5;
const jumpHeight = 10;
let dino = {
x: 10,
y: canvas.height - groundHeight - dinoHeight,
vy: 0,
jumping: false,
};
let obstacles = [];
let score = 0;
let gameOver = false;
function createObstacle() {
const x = canvas.width;
const y = canvas.height - groundHeight - obstacleHeight;
obstacles.push({
x,
y,
});
}
function drawDino() {
ctx.fillStyle = 'green';
ctx.fillRect(dino.x, dino.y, dinoWidth, dinoHeight);
}
function drawObstacles() {
ctx.fillStyle = 'brown';
obstacles.forEach(obstacle => {
ctx.fillRect(obstacle.x, obstacle.y, obstacleWidth, obstacleHeight);
});
}
function drawGround() {
ctx.fillStyle = 'brown';
ctx.fillRect(0, canvas.height - groundHeight, canvas.width, groundHeight);
}
function drawScore() {
ctx.font = '20px Arial';
ctx.fillStyle = 'black';
ctx.fillText(`Score: ${score}`, 10, 30);
}
function updateDino() {
dino.vy += gravity;
dino.y += dino.vy;
if (dino.y + dinoHeight > canvas.height - groundHeight) {
dino.y = canvas.height - groundHeight - dinoHeight;
dino.vy = 0;
dino.jumping = false;
}
}
function updateObstacles() {
obstacles.forEach((obstacle, index) => {
obstacle.x -= 5;
if (obstacle.x + obstacleWidth < 0) {
obstacles.splice(index, 1);
score++;
}
});
}
function checkCollision() {
obstacles.forEach(obstacle => {
if (
dino.x < obstacle.x + obstacleWidth &&
dino.x + dinoWidth > obstacle.x &&
dino.y < obstacle.y + obstacleHeight &&
dino.y + dinoHeight > obstacle.y
) {
gameOver = true;
}
});
}
function gameLoop() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
updateDino();
updateObstacles();
checkCollision();
drawDino();
drawObstacles();
drawGround();
drawScore();
if (gameOver) {
ctx.font = '30px Arial';
ctx.fillText('Game Over!', canvas.width / 2 - 70, canvas.height / 2);
return;
}
requestAnimationFrame(gameLoop);
}
document.addEventListener('keydown', event => {
if (event.code === 'Space' && !dino.jumping) {
dino.vy = -jumpHeight;
dino.jumping = true;
}
});
createObstacle();
setInterval(() => {
createObstacle();
}, 1500);
gameLoop();