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Create PING PONG GAME.html #23

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164 changes: 164 additions & 0 deletions PING PONG GAME.html
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Original file line number Diff line number Diff line change
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<!DOCTYPE html>
<html>
<head>
<title>Lights, Camera, PONG!</title>
<style>
html, body {
margin: 0px;
padding: 0px;
overflow: hidden;
}
</style>
</head>
<body>
<script>
var canvas = document.createElement("canvas"),
width = canvas.width = window.innerWidth,
height = canvas.height = window.innerHeight;

var enemyVelocity = 5;
var enemyScore = 0,
playerScore = 0;

document.body.appendChild(canvas);

var ctx = canvas.getContext("2d");

ctx.fillRect(0, 0, width, height);

var paddle = {
_x: 0,
_y: 0,
_width: 0,
_height: 0,
create: function(x, y, width, height) {
var p = Object.create(this);
p._x = x;
p._y = y;
p._width = width;
p._height = height;
return p;
},

render: function(c) {
c.fillRect(this._x, this._y, this._width, this._height);
},

setX: function(x) {
this._x = x
},

setY: function(y) {
this._y = y;
},

getX: function() {
return this._x;
},

getY: function() {
return this._y;
},

getWidth: function() {
return this._width;
},

getHeight: function() {
return this._height;
}
};

var ball = {
_x: width / 2, // center the ball
_y: height / 2, // center the ball
_vx: -4,
_vy: 4,
_size: 6,

update: function() {
this._x += this._vx;
this._y += this._vy;
},

render: function(c) {
c.beginPath();
c.arc(this._x, this._y, this._size, 0, Math.PI * 2);
c.fill();
c.closePath();
}
};

var playerPaddle = paddle.create(0, 0, 10, 100);
var enemyPaddle = paddle.create(width - 10, 0, 10, 100);

document.body.addEventListener("mousemove", mouseMoveHandler);

function mouseMoveHandler(event) {
playerPaddle.setY(event.clientY - playerPaddle.getHeight() / 2);
}

function reset() {
ball._x = width / 2;
ball._y = height / 2;
ball._vx *= -1;
}

update();

function update() {

ctx.fillStyle = "black";
ctx.fillRect(0, 0, width, height);

if(ball._y - ball._size < 0 || ball._y + ball._size > height) {
ball._vy *= -1;
}

if(ball._x - ball._size < 0) {
if(ball._y >= playerPaddle.getY() && ball._y <= playerPaddle.getY() + playerPaddle.getHeight()) {
ball._vx *= -1;
} else {
enemyScore++;
reset();
}
}

if(ball._x + ball._size > width) {
if(ball._y >= enemyPaddle.getY() && ball._y <= enemyPaddle.getY() + enemyPaddle.getHeight()) {
ball._vx *= -1;
} else {
playerScore++;
reset();
}
}

var enemyPos = enemyPaddle.getY();


// if the paddle is at the top of the screen, start moving down
if(enemyPos < 0) {
enemyVelocity *= -1;
}

// if the paddle is at the bottom of the screen, start moving up
if(enemyPos + enemyPaddle.getHeight() > height) {
enemyVelocity *= -1;
}

// update the position of the enemy paddle
enemyPaddle.setY(enemyPos + enemyVelocity);

ball.update();
ctx.fillStyle = "white";
playerPaddle.render(ctx);
enemyPaddle.render(ctx);
ball.render(ctx);

ctx.fillText(playerScore, width / 4, height / 10);
ctx.fillText(enemyScore, width / 4 * 3, height / 10);
requestAnimationFrame(update);
}
</script>
</body>
</html>