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index.html
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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>2D Breakout Game</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<canvas id="myCanvas" width="480" height="320"></canvas>
<script>
var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");
var x = canvas.width/2;
var y = canvas.height - 30;
var dx = 2;
var dy = -2;
var ballRadius = 10;
var paddleHeight = 10;
var paddleWidth = 75;
var paddleX = (canvas.width - paddleWidth)/2;
var rightPressed = false;
var leftPressed = false;
var brickRowCount = 3;
var brickColumnCount = 5;
var brickWidth = 75;
var brickHeight = 20;
var brickPadding = 10;
var brickOffsetTop = 30;
var brickOffsetLeft = 30;
var bricks = [];
var score = 0;
var lives = 3;
for(c=0; c<brickColumnCount; c++){
bricks[c] = [];
for(r=0; r<brickRowCount; r++){
bricks[c][r] = { x: 0, y: 0, status: 1};
}
}
document.addEventListener("keydown", keyDownHandler, false);
document.addEventListener("keyup", keyUpHandler, false);
document.addEventListener("mousemove", mouseMoveHandler, false);
document.addEventListener("touchmove", touchHandler, false);
function keyDownHandler(e) {
if(e.keyCode === 39){
rightPressed = true;
} else if(e.keyCode === 37){
leftPressed = true;
}
}
function keyUpHandler(e) {
if(e.keyCode === 39){
rightPressed = false;
} else if(e.keyCode === 37){
leftPressed = false;
}
}
function mouseMoveHandler(e) {
var relativeX = e.clientX - canvas.offsetLeft;
if(relativeX > paddleWidth/2 && relativeX < canvas.width - paddleWidth/2){
paddleX = relativeX - paddleWidth/2;
}
}
function touchHandler(event){
event.preventDefault();
var relativeX = event.changedTouches[0].pageX - canvas.offsetLeft;
if(relativeX > paddleWidth/2 && relativeX < canvas.width - paddleWidth/2){
paddleX = relativeX - paddleWidth/2;
}
}
function collisionDetection(){
for(c=0; c<brickColumnCount; c++){
for(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, CONGRATULATIONS!");
document.location.reload();
}
}
}
}
}
}
function drawScore() {
ctx.font = "16px Arial";
ctx.fillStyle = "#0095DD";
ctx.fillText("Score: "+score, 8, 20);
}
function drawBall() {
ctx.beginPath();
ctx.arc(x, y, ballRadius, 0, Math.PI*2);
ctx.fillStyle = "#0095DD";
ctx.fill();
ctx.closePath();
}
function drawPaddle(){
ctx.beginPath();
ctx.rect(paddleX, canvas.height - paddleHeight, paddleWidth, paddleHeight);
ctx.fillStyle = "#0095DD";
ctx.fill();
ctx.closePath();
}
function drawBricks() {
for(c=0; c<brickColumnCount; c++){
for(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 = "#0095DD";
ctx.fill();
ctx.closePath();
}
}
}
}
function drawLives(){
ctx.font = "16px Arial";
ctx.fillStyle = "#0095DD";
ctx.fillText("Lives: "+lives, canvas.width-65, 20);
}
function draw() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
drawBricks();
drawBall();
drawPaddle();
drawScore();
drawLives();
collisionDetection();
if(x + dx < ballRadius || x + dx > canvas.width - ballRadius){
dx = -dx;
}
if(y + dy < ballRadius){
dy = -dy;
} else if( y + dy > canvas.height - ballRadius){
if(x > paddleX && x < paddleX + paddleWidth){
dy = -dy;
} else {
lives--;
if(!lives){
alert("GAME OVER");
document.location.reload();
}
else {
x = canvas.width/2;
y = canvas.height-30;
dx = 2;
dy = -2;
paddleX = (canvas.width-paddleWidth)/2;
}
}
}
if(rightPressed && paddleX < canvas.width - paddleWidth){
paddleX += 7;
} else if(leftPressed && paddleX > 0){
paddleX -= 7;
}
x += dx;
y += dy;
requestAnimationFrame(draw);
}
draw();
</script>
</body>
</html>