HTML
<!DOCTYPE html>
<html>
<head>
<title>Webdev_rachel</title>
<link rel="stylesheet" href="ponegame.css">
<script src="ponegame.js"></script>
</head>
<body>
<div>
</div>
<center>
<h3>Follow @Webdev_rachel</h3>
</center>
<div class="wrapper">
<canvas width="300" height="200"></canvas>
</div>
</body>
</html>
CSS
* {
margin: 0;
padding: 0;
overflow: hidden;
}
canvas {
/*cursor: pointer;*/
background: #F8F8F8;
border-style: groove;
}
.wrapper {
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
width: auto;
}
JAVASCRIPT
window.onload = function () {
var c;
var canvas = document.querySelector("canvas");
c = document.querySelector("canvas");
c = c.getContext("2d");
c.width = 300;
c.height = 200;
var ballX = c.width / 2; //x axis start postition
var ballY = c.height / 2;//y axis start postition
var ballRadius = 4;
var dx = 1; //x velocity
var dy = 1; //y velocity
var paddle1X = 0, paddle1Y = 80, paddle1WIDTH = 3, paddle1HEIGHT = 35;
var paddle2X = 297, paddle2Y = 80, paddle2WIDTH = 3, paddle2HEIGHT = 35;
var score1 = 0;
var score2 = 0;
var AI = .9; // AI= 0 for multiplayer
//mousemove eventListener controls
window.addEventListener("mousemove", function (event) { paddle1Y = event.clientY - innerHeight / 2 - paddle1HEIGHT / 2 + c.height / 2; event.preventDefault(); });
//touchmove eventListener controls
canvas.addEventListener("touchmove", function (e) {
var rect = canvas.getBoundingClientRect();
var root = document.documentElement;
var touch = e.changedTouches[0];
var touchY = parseInt(touch.clientY) - rect.top - root.scrollTop;
e.preventDefault();
paddle1Y = touchY - paddle1HEIGHT / 2;
});
//keyboard controls
function dealWithKeyboard(e) {
if (e.keyCode == "81") { //q
paddle1Y -= 2;
}
else if (e.keyCode == "65") { //a
paddle1Y += 2;
}
if (e.keyCode == "38") { //arrow up
paddle2Y -= 2;
}
else if (e.keyCode == "40") { //arrow down
paddle2Y += 2;
}
}
//game reset
function reset() { //reset game == center ball
ballX = c.width / 2; //center
ballY = c.height / 2; //center
dx = 1; //reset speed
dy = 1; //reset speed
//AI = 1; //reset AI
}
//CORE ANIMATE FUNCTION
function animate() {
requestAnimationFrame(animate);
c.clearRect(0, 0, c.width, c.height); // x, y, innerWidth, innerHeight //clears canvas
c.beginPath(); //begin
//canvas arc circle == ball
c.arc(ballX, ballY, ballRadius, 0, Math.PI * 2, false); //c.arc(x,y,r,startAngle,endAngle, drawCounterClockwise)
c.fill(); //fill inside
c.stroke();//stroke edges
//canvas paddle1 == player 1 paddle
c.beginPath(); //begin
c.fillRect(paddle1X, paddle1Y, paddle1WIDTH, paddle1HEIGHT); //x,y,width,height
//canvas paddle2 == player 2 paddle
c.beginPath(); //begin
c.fillRect(paddle2X, paddle2Y, paddle2WIDTH, paddle2HEIGHT); //x,y,width,height
//score text for player 1 and player 2
c.fillText(score1, 100, 10); //score 1
c.fillText(score2, c.width - 100, 10); //score 2
//game colors + random choice of color
var gameColors = ['red', 'green', 'blue', 'black', 'brown', '#741a1a', '#121f1f'];
var randomColor = gameColors[Math.floor(Math.random() * gameColors.length)]; //index random color
//IF BALL TOUCHES RIGHT PADDLE THEN BOUNCE BACK
function paddle2Bounce() {
if (ballX + ballRadius > c.width) {
if (ballY >= paddle2Y && ballY <= paddle2Y + paddle2HEIGHT) {
dx = -dx - 0.2; //bounce/reverse ball back + make it faster 0.2
//dy = dy-0.1;
//AI = AI-0.3; //make AI faster
c.fillStyle = randomColor;
//c.fillStyle = "#"+Math.random().toString(16).slice(-6); //get random color
}
else {
score1++;
reset();
}
}
}
// END OF RIGHT PADDLE BOUNCE
//IF BALL TOUCHES LEFT PADDLE THEN BOUNCE BACK
function paddle1Bounce() {
if (ballX - ballRadius < 0) {
if (ballY >= paddle1Y && ballY <= paddle1Y + paddle1HEIGHT) {
dx = -dx + 0.2; //bounce/reverse ball back + make it faster 0.2
//dy = dy+0.1;
c.fillStyle = randomColor;
//c.fillStyle = "#"+Math.random().toString(16).slice(-6); //get random color
}
else {
score2++;
reset();
}
}
}
//END OF LEFT PADDLE BOUNCE
//BOUNCE BALL IF IT TOUCHES TOP OR BOTTOM OF THE SCREEN
function topBottomBounce() {
if (ballY + ballRadius > c.height || ballY - ballRadius < 0) {
dy = -dy; //bounce/reverse ball
//c.fillStyle = randomColor;
//c.fillStyle = "#"+Math.random().toString(16).slice(-6); //get random color
}
}
//IF PADDLE IS ABOVE OR BELOW CANVAS - GET IT BACK TO CANVAS
function stayInCanvas() {
if (paddle1Y + paddle1HEIGHT > c.height) {
paddle1Y = c.height - paddle1HEIGHT;
}
if (paddle1Y < 0) {
paddle1Y = 0;
}
if (paddle2Y + paddle2HEIGHT > c.height) {
paddle2Y = 165;
}
if (paddle2Y < 0) {
paddle2Y = 0;
}
}
//AI player
function AIPlayer() {
if (paddle2Y + paddle2HEIGHT / 2 < ballY) {
paddle2Y += AI;
}
else { paddle2Y -= AI; }
}
//move my ball in x and y axis
function moveBallXandYaxis() {
ballX += dx; //run ball in x axis
ballY += dy; //run ball in y axis
}
/*
>>>>>>>>>>CALLING FUNCTIONS<<<<<<<<<<
*/
moveBallXandYaxis(); //moving ball in x and y axis
paddle1Bounce(); //bounce/reverse ball from paddle1
paddle2Bounce(); //bounce/reverse ball from paddle2
topBottomBounce(); //top and bottom bouncing/reversing ball
stayInCanvas(); //paddle1 Y axis can be only in canvas.height
AIPlayer(); //init AI player
} //end of animate(); function
animate(); //init animate(); function
}; //end of onload function
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