Aleksandar.B aleksandar-b

A Spinning globe with glowing city markers in D3.

Note: This visualization constantly recalculates and reprojects the position of over 4000 markers and thus needs a lot of computation power. Older computer and mobile devices might struggle with the rendering process. Furthermore the visualization is only optimized for Chrome browsers and might look different than expected when opened in other browsers.

Inspired by Curran Kelleher's idea to plot a world map in D3 by using the GeoNames database as seen in his great Introdction to D3 video.

How to make faster scroll effects?

Avoid too many reflows (the browser to recalculate everything)
Use advanced CSS3 for graphic card rendering
Precalculate sizes and positions

Beware of reflows

The reflow appens as many times as there are frames per seconds. It recalculate all positions that change in order to diplay them. Basically, when you scroll you execute a function where you move things between two reflows. But there are functions that triggers reflows such as jQuery offset, scroll... So there are two things to take care about when you dynamically change objects in javascript to avoid too many reflows:

	/*

	This example shows how you can use your data structure as a basis for
	your Firebase security rules to implement role-based security. We store
	each user by their Twitter uid, and use the following simplistic approach
	for user roles:

	0 - GUEST
	10 - USER
	20 - MODERATOR

	/* *******************************************************************************************
	* THE UPDATED VERSION IS AVAILABLE AT
	* https://github.com/LeCoupa/awesome-cheatsheets
	* ******************************************************************************************* */


	// 0. Synopsis.
	// http://nodejs.org/api/synopsis.html

	var dom = Bloop.dom;

	var Box = Bloop.createClass({
	getInitialState: function() {
	return { number: 0 };
	},

	updateNumber: function() {
	this.state.number++;
	},

	app.directive('faFastScroll', ['$parse', function ($parse) {
	var Interval = function(min, max) {
	this.min = min \|\| 0;
	this.max = max \|\| 0;
	};

	Interval.prototype.clip = function(min, max) {
	if(this.max <= min \|\| this.min >= max) {
	this.min = this.max = 0;

	function delay(expressionAsFunction) {
	var result;
	var isEvaluated = false;

	return function () {
	if (!isEvaluated)
	result = expressionAsFunction();
	return result;
	};
	}

	<!DOCTYPE HTML>
	<html lang="en">
	<head>
	<meta http-equiv="Content-type" content="text/html; charset=utf-8">
	<title>OpenTok API Sample — Basic Tutorial</title>
	<link href="samples.css" type="text/css" rel="stylesheet" >
	<script src="http://staging.tokbox.com/v0.91/js/TB.min.js" type="text/javascript" charset="utf-8"></script>
	</head>
	<body>
	<script type="text/javascript" charset="utf-8">

	/*
	* This work is free. You can redistribute it and/or modify it under the
	* terms of the Do What The Fuck You Want To Public License, Version 2,
	* as published by Sam Hocevar. See the COPYING file for more details.
	*/
	/*
	* Easing Functions - inspired from http://gizma.com/easing/
	* only considering the t value for the range [0, 1] => [0, 1]
	*/
	EasingFunctions = {