Summary

This file must be loaded in your HTML document before any other mathematical objects. Make sure to change the pathToHere variable, and either put the files you need in the autoLoad array, or include them individually.

/**MathWorx Copyright (c) 2008 Shane Steinert-Threlkeld
Dual-licensed under the MIT and GNU GPL Licenses.
For more information, see LICENSE file */

/** @fileoverview  This file must be loaded in your HTML document <strong>before</strong> any other mathematical objects. 
Make sure to change the pathToHere variable, and either put the files you need in the autoLoad array, or include them individually. */

/**The value of zero to use in cases of roundoff error, etc. 
@type Number
@final */
var Zero = 1e-6;
/**The path to the directory containing all the files; can be a URL or a complete path 
@type String
@final */
var pathToHere = "http://cis.jhu.edu/~shanest/js/mathworx/";
/**The names of the files to automatically load whenever easyload.js is loaded (['Matrix'], i.e.) 
@type Array
@final */
var autoLoad = [];
/**The path to image icons.  See SceneButton.js to see and/or change file names.
@type String
@final */
var pathToButtons = 'http://cis.jhu.edu/~shanest/js/mathworx/3D/buttons/';

//DO NOT REMOVE OR CHANGE THE CODE BELOW HERE

var includes = new Array();

/** Includes a file in an HTML document.  There MUST be a &lt;head&gt; tag in the HTML document as that is where the &lt;script&gt; tag will be added.
Will only include a file once so that it does not get loaded multiple times.
@param {String} file the URL or path of the file to be included */
function include(file) {
	if(includes.contains(file)) {
		return null;
	}
	var script = document.createElement("script");
	script.setAttribute("type","text/javascript");
	script.setAttribute("src",file);
	var head = document.getElementsByTagName("head")[0];
	head.insertBefore(script, head.firstChild);
	includes.push(file);
}

/** Includes all of the files in a supplied array (autoLoad for example).
@param {Array} dependsOn the array of filenames to be included (pathToHere/filename) */
function require(dependsOn) {
	for(i = 0; i < dependsOn.length; i++) {
		include(pathToHere + '' + dependsOn[i] + '.js');
	}
}

/**Adds a method to the Array prototype to test whether or not two Arrays (including nested arrays) are equal.  
Largely taken from open source: http://www.svendtofte.com/code/usefull_prototypes/prototypes.js
@param {Array} arr the array with which to check equality
@return {Boolean} true if two arrays are equal, false if not 
@addon */
Array.prototype.compareArray = function(arr) {
	if(this.length != arr.length) {
		return false;
	}
	for(var i = 0; i < this.length; i++) {
		if(this[i].compareArray) {
			if(!this[i].compareArray(arr[i])) {
				return false;
			} else {
				continue;
			}
		}
		//NOTE: only change to !-- if you are very sure
		if(this[i] != arr[i]) {
			return false;
		}
	}
	return true;
}

/**Adds a method to the Array prototype to check whether or not the array contains a given object.
@param {Object} obj the object to search for in the array
@return {Boolean} true if obj is in this array, false otherwise */
Array.prototype.contains = function(obj) {
	for(var i = 0; i < this.length; i++) {
		if(this[i] == obj) {
			return true;
		}
	}
	return false;
}


require(autoLoad);