Levi McCallum levi

milani / advanced_collision_detection.js

Created March 16, 2011 21:15

Collision detection with javascript using interval tree

	// Collision detection with javascript using semi-interval tree.
	// Add elements using insert function, then check collision using hasCollision.
	var collisionTree = {
	LEFT: 1,
	RIGHT: 0,
	INTERSECT: 2,
	nodes:null,
	margin: 1,
	init: function(margin){
	this.nodes = new Array();

aroder / CacheProvider.js

Created March 15, 2011 18:58

An implementation of Dustin Diaz's CacheProvider with a simplified interface

	/**
	* {Boolean} useLocalStorageIfAvailable - optional, defaults to true. The CacheProvider object will
	* use the HTML5 localStorage object, if available
	*/
	function CacheProvider(useLocalStorageIfAvailable) {
	// values will be stored here
	this._cache = {};

	this._useLocalStorage = 'undefined' == typeof(useLocalStorageIfAvailable) ? true : useLocalStorageIfAvailable;
	}

pelf / snow.html

Created November 26, 2010 02:51

html5 canvas snow flakes (as seen on http://goplanapp.com/home/blackfriday)

	<!DOCTYPE html>
	<head>
	<title>Snow</title>
	<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js" type="text/javascript"></script>
	<script src="snow.js" type="text/javascript"/></script>
	</head>
	<body onload="init();">
	<canvas id="bgcanvas" width="410" height="316" style="position:absolute;z-index:2"></canvas>
	<img src="globe_layers_2.png" style="position:absolute;z-index:3">
	<canvas id="fgcanvas" width="410" height="316" style="position:absolute;z-index:4"></canvas>

padolsey / gist:527683

Created August 16, 2010 20:30

	// ----------------------------------------------------------
	// A short snippet for detecting versions of IE in JavaScript
	// without resorting to user-agent sniffing
	// ----------------------------------------------------------
	// If you're not in IE (or IE version is less than 5) then:
	// ie === undefined
	// If you're in IE (>=5) then you can determine which version:
	// ie === 7; // IE7
	// Thus, to detect IE:
	// if (ie) {}