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PongGame - 2 Player.html
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<!DOCTYPE html>
<head>
<style>
canvas {
position:fixed;
left:0;
top:0;
width:100%;
height:100%;
}
</style>
</head>
<body>
<canvas id="canvas1" tabindex="0" style="border:1px solid #000000;">
</canvas>
<script>
//Default canvas code.
var canvas = document.getElementById("canvas1");
var ctx = canvas.getContext("2d");
var requestAnimationFrame = window.requestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.msRequestAnimationFrame;
//Sets the canas to fullscren.
canvas.width = 800;
canvas.height = 400;
//Audio declaration
var blip = [];
for (i = 1; i <= 7; i++)
{
blip[i] = new Audio();
blip[i].src = 'blip' + [i] + '.mp3';
}
//Seperator attributes
var sepWidth = 5;
var sepHeight = 10;
var sepColor = "white";
var sepX = (canvas.width/2) - (sepWidth/2);
var sepY = 0;
//Shared players attributes
var barWidth = 10;
var barHeight = 100;
var barColor = "white";
var barSpeed = 0;
//First player position.
var player1BarX = 0;
var player1BarY = (canvas.height / 2) - (barHeight / 2);
//Second player position.
var player2BarX = canvas.width - barWidth;
var player2BarY = (canvas.height / 2) - (barHeight / 2);
//Level attribute
var levelFont = "25px Arial";
var levelX = 0;
var levelY = canvas.height;
var level = 1;
//Shared score attribute
var scoreFont = "50px Arial";
var scoreY = 50;
//Player 1 score
var player1Score = 0;
var player1ScoreX = sepX - 75;
//Player 2 score
var player2Score = 0;
var player2ScoreX = sepX + 50;
//Score conditions
var scoreWin = 3;
var scoreLose = 3;
//Ball attributes
var ballX = canvas.width/2;
var ballY = canvas.height/2;
var ballRad = 7.5;
var ballColor = "white";
var ballSpeed = 4;
//Ball movements
var goDown = false;
var goUp = false;
var goRight = true;
var goLeft = false;
//Boolean value to disable AI if a human player is present.
var player2Present = false;
//The delay time is in milliseconds.
var delayBetweenFrames = 0;
//Stores the keystates
var keys = [];
//Event listener for multiple keys.
document.body.addEventListener("keydown", function (e) {
keys[e.keyCode] = true;
});
document.body.addEventListener("keyup", function (e) {
keys[e.keyCode] = false;
});
function aiMovement()
{
if (!player2Present)
{
if (ballY > player2BarY + barHeight)
{
player2BarY++;
}
else if (ballY < player2BarY)
{
player2BarY--;
}
}
}
function getDistance(barX, barY)
{
//Collision detection
if (barX < ballX + ballRad
&& barX + barWidth > ballX
&& barY < ballY + ballRad
&& barY + barHeight > ballY)
{
return true;
}
}
function barMovement()
{
//S key
if (keys[83])
{
barLimitCheck(player1BarY, 83);
player1BarY += barSpeed;
}
//W key
if (keys[87])
{
barLimitCheck(player1BarY, 87);
player1BarY -= barSpeed;
}
//Down arrow
if (keys[40])
{
player2Present = true;
barLimitCheck(player2BarY, 40);
player2BarY += barSpeed;
}
//Up arrow
if (keys[38])
{
player2Present = true;
barLimitCheck(player2BarY, 38);
player2BarY -= barSpeed;
}
if (keys[187])
{
ballSpeed += 0.25;
}
if (keys[189])
{
ballSpeed -= 0.25;
}
}
function barLimitCheck(barY, keyInput)
{
//If the bar reaches the canvas limit, then stop it from going outside.
if (barY >= (canvas.height - barHeight) && (keyInput == 40 || keyInput == 83))
{
barSpeed = 0;
}
else if (barY <= 0 && (keyInput == 38 || keyInput == 87))
{
barSpeed = 0;
}
else
{
barSpeed = 4;
}
return barSpeed;
}
function drawRectangle(x, y, width, height, color)
{
ctx.fillStyle = color;
ctx.fillRect(x, y, width, height);
}
function drawCircle(x, y, radius, color)
{
ctx.beginPath();
ctx.arc(x, y, radius, 0, 2 * Math.PI);
ctx.fillStyle = color;
ctx.fill();
}
function drawText(font, text, x, y)
{
ctx.font = font;
ctx.fillText(text, x, y);
}
function drawSeperator()
{
while (sepY < canvas.height)
{
drawRectangle(sepX, sepY, sepWidth, sepHeight, sepColor);
sepY += 20;
}
//If the sepeator reaches canvas limit, then its Y will be reset to 0 so it can continue drawing the seperator.
if (sepY >= canvas.height)
{
sepY = 0;
}
}
function resetBall()
{
ballX = canvas.width/2;
ballY = canvas.height/2;
}
function ballMovement()
{
if (goDown)
{
ballY += ballSpeed;
}
if (goUp)
{
ballY -= ballSpeed;
}
if (goRight)
{
ballX += ballSpeed;
}
if (goLeft)
{
ballX -= ballSpeed;
}
if (ballY >= canvas.height)
{
blip[3].play();
goUp = true;
goDown = false;
}
if (ballY <= 0)
{
blip[4].play();
goUp = false;
goDown = true;
}
}
function hitReaction(playerNum)
{
if (playerNum == 1)
{
goLeft = false;
goRight = true;
blip[1].play();
}
else
{
goLeft = true;
goRight = false;
blip[2].play();
}
if (Math.random() <= 0.33)
{
goUp = true;
goDown = false;
}
else if (Math.random() >= 0.66)
{
goUp = false;
goDown = true;
}
else
{
goUp = false;
goDown = false;
}
}
function goalDetection()
{
if (ballX >= canvas.width)
{
blip[5].play();
player1Score++;
resetBall();
goRight = false;
goLeft = true;
}
if (ballX <= 0)
{
blip[5].play();
player2Score++;
resetBall();
goRight = true;
goLeft = false;
}
}
function winLevel()
{
blip[6].play();
level++;
ballSpeed += 0.25;
scoreWin++;
scoreLose--;
barHeight -= 20;
player1Score = 0;
player2Score = 0;
}
function loseLevel(gameComplete)
{
if (gameComplete == 1)
{
blip[6].play();
alert("You have completed the game!");
}
else
{
blip[7].play();
alert("Game over!");
}
//Resets the game stats.
level = 1;
ballSpeed = 4;
scoreWin = 3;
scoreLose = 3;
barHeight = 100;
player1Score = 0;
player2Score = 0;
}
function checkScore()
{
if (level == 1 && player1Score == 3)
{
winLevel();
}
if (level == 1 && player2Score == 3)
{
loseLevel();
}
if (level == 2 && player1Score == 4)
{
winLevel();
}
if (level == 2 && player2Score == 2)
{
loseLevel();
}
if (level == 3 && player1Score == 5)
{
//If the player completes the game, the game will reset.
loseLevel(1);
}
if (level == 3 && player2Score == 1)
{
loseLevel();
}
}
//Declare the animate() function.
function animate()
{
//Use the setTimeout to do the animation between frame using the delayBetweenFrames.
setTimeout(function()
{
//Clears the canvas.
ctx.clearRect(0, 0, canvas.width, canvas.height);
//Animation code goes into this anonymous function handler.
requestAnimationFrame(animate);
//Draws the black background.
drawRectangle(0, 0, canvas.width, canvas.height, "black");
//Draws the seperator.
drawSeperator();
//Moves the ball.
ballMovement();
//Draws the ball.
drawCircle(ballX, ballY, ballRad, ballColor);
//Moves the player bars if keys are pressed.
barMovement();
//Moves the bar if no player is present
aiMovement();
//Detects goals
goalDetection();
//Draws the first player.
drawRectangle(player1BarX, player1BarY, barWidth, barHeight, barColor);
//Draws the second player.
drawRectangle(player2BarX, player2BarY, barWidth, barHeight, barColor);
//Draws 1st player score.
drawText(scoreFont, player1Score, player1ScoreX, scoreY);
//Draws 2nd player score.
drawText(scoreFont, player2Score, player2ScoreX, scoreY);
//Draws the level number.
drawText(levelFont, "Level: " + level, levelX, levelY);
//If player 2 not present, then do not check the score of the players.
if (!player2Present)
{
checkScore();
}
//If the ball hits the bar
if (getDistance(player1BarX, player1BarY))
{
hitReaction(1);
}
if (getDistance(player2BarX, player2BarY))
{
hitReaction(2);
}
}, delayBetweenFrames);
}
//Calls the animate() function.
animate();
</script>
</body>
</html>