Current File : //proc/thread-self/root/opt/cpanel/ea-tomcat85/webapps/examples/websocket/snake.xhtml
<?xml version="1.0" encoding="UTF-8"?>
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this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
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See the License for the specific language governing permissions and
limitations under the License.
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<title>Apache Tomcat WebSocket Examples: Multiplayer Snake</title>
<style type="text/css"><![CDATA[
#playground {
width: 640px;
height: 480px;
background-color: #000;
}
#console-container {
float: left;
margin-left: 15px;
width: 300px;
}
#console {
border: 1px solid #CCCCCC;
border-right-color: #999999;
border-bottom-color: #999999;
height: 480px;
overflow-y: scroll;
padding-left: 5px;
padding-right: 5px;
width: 100%;
}
#console p {
padding: 0;
margin: 0;
}
]]></style>
</head>
<body>
<div class="noscript"><h2 style="color: #ff0000">Seems your browser doesn't support JavaScript! Websockets rely on JavaScript being enabled. Please enable
JavaScript and reload this page!</h2></div>
<div style="float: left">
<canvas id="playground" width="640" height="480"/>
</div>
<div id="console-container">
<div id="console"/>
</div>
<script type="text/javascript"><![CDATA[
"use strict";
var Game = {};
Game.fps = 30;
Game.socket = null;
Game.nextFrame = null;
Game.interval = null;
Game.direction = 'none';
Game.gridSize = 10;
function Snake() {
this.snakeBody = [];
this.color = null;
}
Snake.prototype.draw = function(context) {
for (var id in this.snakeBody) {
context.fillStyle = this.color;
context.fillRect(this.snakeBody[id].x, this.snakeBody[id].y, Game.gridSize, Game.gridSize);
}
};
Game.initialize = function() {
this.entities = [];
var canvas = document.getElementById('playground');
if (!canvas.getContext) {
Console.log('Error: 2d canvas not supported by this browser.');
return;
}
this.context = canvas.getContext('2d');
window.addEventListener('keydown', function (e) {
var code = e.keyCode;
if (code > 36 && code < 41) {
switch (code) {
case 37:
if (Game.direction != 'east') Game.setDirection('west');
break;
case 38:
if (Game.direction != 'south') Game.setDirection('north');
break;
case 39:
if (Game.direction != 'west') Game.setDirection('east');
break;
case 40:
if (Game.direction != 'north') Game.setDirection('south');
break;
}
}
}, false);
if (window.location.protocol == 'http:') {
Game.connect('ws://' + window.location.host + '/examples/websocket/snake');
} else {
Game.connect('wss://' + window.location.host + '/examples/websocket/snake');
}
};
Game.setDirection = function(direction) {
Game.direction = direction;
Game.socket.send(direction);
Console.log('Sent: Direction ' + direction);
};
Game.startGameLoop = function() {
if (window.webkitRequestAnimationFrame) {
Game.nextFrame = function () {
webkitRequestAnimationFrame(Game.run);
};
} else if (window.mozRequestAnimationFrame) {
Game.nextFrame = function () {
mozRequestAnimationFrame(Game.run);
};
} else {
Game.interval = setInterval(Game.run, 1000 / Game.fps);
}
if (Game.nextFrame != null) {
Game.nextFrame();
}
};
Game.stopGameLoop = function () {
Game.nextFrame = null;
if (Game.interval != null) {
clearInterval(Game.interval);
}
};
Game.draw = function() {
this.context.clearRect(0, 0, 640, 480);
for (var id in this.entities) {
this.entities[id].draw(this.context);
}
};
Game.addSnake = function(id, color) {
Game.entities[id] = new Snake();
Game.entities[id].color = color;
};
Game.updateSnake = function(id, snakeBody) {
if (typeof Game.entities[id] != "undefined") {
Game.entities[id].snakeBody = snakeBody;
}
};
Game.removeSnake = function(id) {
Game.entities[id] = null;
// Force GC.
delete Game.entities[id];
};
Game.run = (function() {
var skipTicks = 1000 / Game.fps, nextGameTick = (new Date).getTime();
return function() {
while ((new Date).getTime() > nextGameTick) {
nextGameTick += skipTicks;
}
Game.draw();
if (Game.nextFrame != null) {
Game.nextFrame();
}
};
})();
Game.connect = (function(host) {
if ('WebSocket' in window) {
Game.socket = new WebSocket(host);
} else if ('MozWebSocket' in window) {
Game.socket = new MozWebSocket(host);
} else {
Console.log('Error: WebSocket is not supported by this browser.');
return;
}
Game.socket.onopen = function () {
// Socket open.. start the game loop.
Console.log('Info: WebSocket connection opened.');
Console.log('Info: Press an arrow key to begin.');
Game.startGameLoop();
setInterval(function() {
// Prevent server read timeout.
Game.socket.send('ping');
}, 5000);
};
Game.socket.onclose = function () {
Console.log('Info: WebSocket closed.');
Game.stopGameLoop();
};
Game.socket.onmessage = function (message) {
var packet = JSON.parse(message.data);
switch (packet.type) {
case 'update':
for (var i = 0; i < packet.data.length; i++) {
Game.updateSnake(packet.data[i].id, packet.data[i].body);
}
break;
case 'join':
for (var j = 0; j < packet.data.length; j++) {
Game.addSnake(packet.data[j].id, packet.data[j].color);
}
break;
case 'leave':
Game.removeSnake(packet.id);
break;
case 'dead':
Console.log('Info: Your snake is dead, bad luck!');
Game.direction = 'none';
break;
case 'kill':
Console.log('Info: Head shot!');
break;
}
};
});
var Console = {};
Console.log = (function(message) {
var console = document.getElementById('console');
var p = document.createElement('p');
p.style.wordWrap = 'break-word';
p.innerHTML = message;
console.appendChild(p);
while (console.childNodes.length > 25) {
console.removeChild(console.firstChild);
}
console.scrollTop = console.scrollHeight;
});
Game.initialize();
document.addEventListener("DOMContentLoaded", function() {
// Remove elements with "noscript" class - <noscript> is not allowed in XHTML
var noscripts = document.getElementsByClassName("noscript");
for (var i = 0; i < noscripts.length; i++) {
noscripts[i].parentNode.removeChild(noscripts[i]);
}
}, false);
]]></script>
</body>
</html>
Mini Shell