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screenPong.html
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<html>
<head>
<script type="text/javascript" src="https://www.airconsole.com/api/airconsole-1.3.0.js"></script>
<script type="text/javascript">
var airconsole;
var paddles;
var ball;
var score = [0, 0];
var canvas;
var last = null;
var score_el;
/**
* Sets up the communication to game pads.
*/
function setupConsole() {
airconsole = new AirConsole();
airconsole.onConnect = function(device_id) {
checkTwoPlayers();
};
airconsole.onDisconnect = function(device_id) {
var player = airconsole.convertDeviceIdToPlayerNumber(device_id);
if (player != undefined) {
// Player that was in game left the game.
// Setting active players to length 0.
airconsole.setActivePlayers(0);
}
checkTwoPlayers();
};
airconsole.onMessage = function(device_id, data) {
var player = airconsole.convertDeviceIdToPlayerNumber(device_id);
if (player != undefined && data.move !== undefined) {
paddles[player].move.y = data.move;
}
};
}
/**
* Checks if two players are connected!
*/
function checkTwoPlayers() {
var active_players = airconsole.getActivePlayerDeviceIds();
var connected_controllers = airconsole.getControllerDeviceIds();
// Only update if the game didn't have active players.
if (active_players.length == 0) {
if (connected_controllers.length >= 2) {
// Enough controller devices connected to start the game.
// Setting the first 2 controllers to active players.
airconsole.setActivePlayers(2);
resetBall(50, 0);
score = [0, 0];
score_el.innerHTML = score.join(":");
document.getElementById("wait").innerHTML = "";
} else if (connected_controllers.length == 1) {
document.getElementById("wait").innerHTML = "Need 1 more player!";
resetBall(0, 0);
} else if (connected_controllers.length == 0) {
document.getElementById("wait").innerHTML = "Need 2 more players!";
resetBall(0, 0);
}
}
}
/**
* Sends a message to the device that it should vibrate;
*/
function vibrate(player) {
airconsole.message(
airconsole.convertPlayerNumberToDeviceId(player),
{ vibrate: 1000 })
}
/**
* Shows who scored and updates the score afterwards.
*/
function displayScore(player) {
var name = airconsole.getNickname(
airconsole.convertPlayerNumberToDeviceId(player));
score_el.innerHTML = "<div style='font-size: 20px;margin-top:16px'>" +
name + " scored!</div>";
window.setTimeout(function() {
score_el.innerHTML = score.join(":");
}, 1000);
}
/**
* body.onload function.
*/
function init() {
setupConsole();
// Setting up the game. Nothing AirConsole specific.
canvas = document.getElementById("canvas");
score_el = document.getElementById("score");
paddles = [
{ pos: {x: 10, y: 50}, move: {x: 0, y: 0 },
el: document.getElementById("player_1") },
{ pos: {x: 190, y: 53}, move: {x: 0, y: 0 },
el: document.getElementById("player_2") } ];
ball = { pos: { x: 100, y: 50 }, move: {x: 0, y: 0 },
el: document.getElementById("ball") };
canvas.width = canvas.clientWidth;
canvas.height = canvas.clientHeight;
window.onresize = (clearCanvas);
last = new Date().getTime();
loop();
}
/**
* Moving an element. Nothing AirConsole specific.
* @param entity
*/
function updatePos(entity, delta) {
entity.pos.x += entity.move.x*delta;
entity.pos.y += entity.move.y*delta;
}
/**
* Moving the ball and drawing the canvas. Nothing AirConsole specific.
*/
function loop() {
var now = new Date().getTime();
var delta = (now - last);
delta = Math.min(20, delta);
delta /= 1000;
last = now;
draw(true);
updatePos(paddles[0], delta);
updatePos(paddles[1], delta);
updatePos(ball, delta);
// paddle limit
paddles[0].pos.y = Math.min(Math.max(10, paddles[0].pos.y), 90);
paddles[1].pos.y = Math.min(Math.max(10, paddles[1].pos.y), 90);
// Wall bounce
if (ball.pos.y <= 1) {
ball.pos.y = 1;
ball.move.y *= -1;
updatePos(ball, 0);
}
if (ball.pos.y >= 99) {
ball.pos.y = 99;
ball.move.y *= -1;
updatePos(ball, 0);
}
// Paddle bounce
if (ball.pos.x >= paddles[0].pos.x - 2 &&
ball.pos.x <= paddles[0].pos.x + 2 &&
ball.pos.y >= paddles[0].pos.y - 10 &&
ball.pos.y <= paddles[0].pos.y + 10) {
ball.move.x *= -1;
ball.move.y += (ball.pos.y - paddles[0].pos.y)*2;
ball.pos.x = paddles[0].pos.x + 2;
}
if (ball.pos.x >= paddles[1].pos.x - 2 &&
ball.pos.x <= paddles[1].pos.x + 2 &&
ball.pos.y >= paddles[1].pos.y - 10 &&
ball.pos.y <= paddles[1].pos.y + 10) {
ball.move.x *= -1;
ball.move.y += (ball.pos.y - paddles[1].pos.y)*2;
ball.pos.x = paddles[1].pos.x - 2;
}
// Score
if (ball.pos.x >= 200) {
score[0] += 1;
displayScore(0);
resetBall(-ball.move.x, ball.move.y/2);
vibrate(1);
}
if (ball.pos.x <= 0) {
score[1] += 1;
displayScore(1);
resetBall(-ball.move.x, ball.move.y/2);
vibrate(0);
}
draw();
requestAnimationFrame(loop);
}
/**
* Reseting the ball. Nothing Game Console specific.
* @param move_x
* @param move_y
*/
function resetBall(move_x, move_y) {
clearCanvas();
ball.pos.x = 100;
ball.pos.y = 50;
ball.move.x = move_x;
ball.move.y = move_y;
}
/**
* Reseting the ball. Nothing Game Console specific.
* @param move_x
* @param move_y
*/
function clearCanvas() {
var ctx = canvas.getContext("2d");
ctx.fillStyle = "black";
canvas.width = canvas.clientWidth;
canvas.height = canvas.clientHeight;
ctx.fillRect(0,0, canvas.width, canvas.height);
}
/**
* Drawing the game scene. Nothing Game Console specific.
* @param clear
*/
function draw(clear) {
// Draw
var ctx = canvas.getContext("2d");
var zoom = canvas.clientHeight / 100;
function c(x) {
x *= zoom;
return x | 0; // round
}
ctx.fillStyle = clear ? 'black' : 'white';
ctx.fillRect(c(paddles[0].pos.x - 1),c(paddles[0].pos.y - 10),
c(2), c(20));
ctx.fillRect(c(paddles[1].pos.x - 1),c(paddles[1].pos.y - 10),
c(2), c(20));
ctx.beginPath();
ctx.arc(c(ball.pos.x), c(ball.pos.y), c(clear ? 3 : 2), 0,
2 * Math.PI, false);
ctx.fill();
ctx.closePath();
}
</script>
<style type="text/css">
@font-face {
font-family: 'PressStart2P';
src: url('PressStart2P.ttf') format('truetype');
}
html, body {
height: 100%;
margin: 0px;
font-family: 'PressStart2P', sans-serif;
color: white;
text-align: center;
}
.game {
background-color: black;
top: 50%;
margin-top: -25%;
padding-bottom: 50%;
overflow: hidden;
position: relative;
}
#canvas {
position: absolute;
top: 0px;
left:0px;
width: 100%;
height: 100%;
}
#score {
position: absolute;
top: 10%;
left: 0px;
width: 100%;
font-size: 48px;
}
#wait {
position: absolute;
top: 10%;
margin-top: 80px;
left: 0px;
width: 100%;
font-size: 24px;
color: lime;
}
</style>
</head>
<body onload="init()">
<div class="game">
<canvas id="canvas"></canvas>
<div id="score">0:0</div>
<div id="wait"></div>
</div>
</body>
</html>