Geo Blaster Extended Full Source

Example A-2. Geo Blaster Extended full source code listing

<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>CH9EX1: Geo Blaster Extended</title>
<script src="modernizr-1.6.min.js"></script>
<script type="text/javascript">
window.addEventListener('load', eventWindowLoaded, false);
function eventWindowLoaded() {

    canvasApp();

}

function canvasSupport () {
   return Modernizr.canvas;
}

function supportedAudioFormat(audio) {
   var returnExtension = "";
   if (audio.canPlayType("audio/ogg") =="probably" ||
       audio.canPlayType("audio/ogg") == "maybe") {
         returnExtension = "ogg";
   } else if(audio.canPlayType("audio/wav") =="probably" ||
       audio.canPlayType("audio/wav") == "maybe") {
         returnExtension = "wav";
   } else if(audio.canPlayType("audio/wav") == "probably" ||
       audio.canPlayType("audio/wav") == "maybe") {
         returnExtension = "mp3";
   }

   return returnExtension;

}

function canvasApp(){

   if (!canvasSupport()) {
          return;
     }else{
       theCanvas = document.getElementById("canvas");
       context = theCanvas.getContext("2d");
   }

   //sounds
   var SOUND_EXPLODE = "explode1";
   var SOUND_SHOOT = "shoot1";
   var SOUND_SAUCER_SHOOT = "saucershoot"
   var MAX_SOUNDS = 9;
   var soundPool = new Array();
   var explodeSound;
   var explodeSound2;
   var explodeSound3;
   var shootSound;
   var shootSound2;
   var shootSound3;
   var saucershootSound;
   var saucershootSound2;
   var saucershootSound3;
   var audioType;

   //application states
   var GAME_STATE_INIT = 0;
   var GAME_STATE_WAIT_FOR_LOAD = 5;
   var GAME_STATE_TITLE = 10 ...

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