Game in canvas

Developer
Khangeldy
Size
2,977 Kb
Views
12,144
  1. Game in canvas Previews
  2. Game in canvas HTML Codes
  3. Game in canvas CSS Codes
  4. Game in canvas JS Codes

How do I make an game in canvas?

By Mozilla tutorial. What is a game in canvas? How do you make a game in canvas? This script and codes were developed by Khangeldy on 09 November 2022, Wednesday.

Game in canvas Previews
IQ Test

Game in canvas - Script Codes HTML Codes

<!DOCTYPE html>
<html class="pen">
<head> <meta charset="UTF-8"> <title>Game in canvas</title> <link rel="stylesheet" href="css/style.css">
</head>
<body> <canvas id="game"></canvas> <script src="js/index.js"></script>
</body>
</html>

Game in canvas - Script Codes CSS Codes

html, body { height: 100%;
}
* { padding: 0; margin: 0;
}
#game { background: #eee;
}

Game in canvas - Script Codes JS Codes

var canvas = document.getElementById('game');
canvas.width = document.querySelector('.pen > body').clientWidth;
canvas.height = document.querySelector('.pen > body').clientHeight;
var ctx = canvas.getContext('2d'),	x = canvas.width / 2,	y = canvas.height - 30,	dx = 2,	dy = -2;
// ball
var ballRadius = 10;
// paddle
var paddleHeight = 10,	paddleWidth = 75,	paddleX = (canvas.width - paddleWidth) / 2,	rightPressed = false,	leftPressed = false;
// bricks
var bricks = [],	brickWidth = 75,	brickRowCount = 3,	brickColumnCount = 5,	brickHeight = 20,	brickPadding = 20,	brickOffsetTop = 30,	brickOffsetLeft = 30;
// score
var score = 0;
// lives
var lives = 3;
for(var c = 0; c < brickColumnCount; c++) {	bricks[c] = [];	for(var r = 0; r < brickRowCount; r++) {	bricks[c][r] = {x: 0, y: 0, status: 1};	}
}
function drawBricks() {	for(var c = 0; c < brickColumnCount; c++) {	for(var r = 0; r < brickRowCount; r++) {	if(bricks[c][r].status == 1) {	var brickX = (c * (brickWidth + brickPadding)) + brickOffsetLeft;	var brickY = (r * (brickHeight + brickPadding)) + brickOffsetTop;	bricks[c][r].x = brickX;	bricks[c][r].y = brickY;	ctx.beginPath();	ctx.rect(brickX, brickY, brickWidth, brickHeight);	ctx.fillStyle = '#0045ae';	ctx.fill();	ctx.closePath();	}	}	}
}
function drawBall() {	ctx.beginPath();	ctx.arc(x, y, ballRadius, 0, Math.PI * 2, false);	ctx.fillStyle = '#454545';	ctx.fill();	ctx.closePath();
}
function drawPaddle() {	ctx.beginPath();	ctx.rect(paddleX, canvas.height - paddleHeight, paddleWidth, paddleHeight);	ctx.fillStyle = '#242424';	ctx.fill();	ctx.closePath();
}
function draw() {	ctx.clearRect(0, 0, canvas.width, canvas.height);	drawBricks();	drawBall();	drawPaddle();	drawScore();	drawLives();	collisionDetection();	x += dx;	y += dy;	if(y + dy < ballRadius) {	dy = -dy;	} else if(y + dy > canvas.height - ballRadius) {	if(x > paddleX && x < paddleX + paddleWidth) {	if(y = y - paddleHeight) {	dy = -dy;	}	draw();	} else {	lives--;	if(!lives) {	lives = 3;	alert("GAME OVER");	}	x = canvas.width / 2;	y = canvas.height - 30;	dy = -2;	dx = 2;	score = 0;	for(c = 0; c < brickColumnCount; c++) {	for(r = 0; r < brickRowCount; r++) {	bricks[c][r].status = 1;	}	}	draw();	}	requestAnimationFram(draw);	}	if(x + dx < ballRadius || x + dx > canvas.width - ballRadius) {	dx = -dx;	}	if(rightPressed && paddleX < canvas.width - paddleWidth) {	paddleX += 7;	} else if(leftPressed && paddleX > 0) {	paddleX -= 7;	}	requestAnimationFrame(draw);
}
function keyDownHandler(event) {	if(event.keyCode == 39) {	rightPressed = true;	} else if(event.keyCode == 37) {	leftPressed = true;	}
}
function keyUpHandler(event) {	if(event.keyCode == 39) {	rightPressed = false;	} else if(event.keyCode == 37) {	leftPressed = false;	}
}
function mouseMoveHandler(event) {	var relativeX = event.x - canvas.offsetLeft;	if(relativeX > 0 && relativeX < canvas.width) {	paddleX = relativeX - paddleWidth / 2;	}
}
function collisionDetection() {	for(var c = 0; c < brickColumnCount; c++) {	for(var r = 0; r < brickRowCount; r++) {	var b = bricks[c][r];	if(b.status == 1) {	if(x > b.x && x < b.x + brickWidth && y > b.y && y < b.y + brickHeight) {	dy = -dy;	b.status = 0;	score++;	if(score == brickRowCount * brickColumnCount) {	alert('You win');	draw();	}	}	}	}	}
}
function drawScore() {	ctx.font = '15px Serif';	ctx.fillStyle = '#343434';	ctx.fillText('Score:' + score, 8, 20);
}
function drawLives() {	ctx.font = '15px Serif';	ctx.fillStyle = '#343434';	ctx.fillText('Lives: ' + lives, canvas.width - 65, 20);
}
document.addEventListener('keydown', keyDownHandler, false);
document.addEventListener('keyup', keyUpHandler, false);
document.addEventListener('mousemove', mouseMoveHandler, false);
draw();
Game in canvas - Script Codes
Game in canvas - Script Codes
Home Page Home
Developer Khangeldy
Username Khangeldy
Uploaded November 09, 2022
Rating 3
Size 2,977 Kb
Views 12,144
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