Paul Robinson r8n5n

r8n5n / index.html

Last active October 23, 2019 10:06

Twinkling star field using canvas/js

	<!DOCTYPE html>
	<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
	<head>
	<meta charset="utf-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
	<meta name="mobile-web-app-capable" content="yes" />
	<meta name="apple-mobile-web-app-capable" content="yes" />
	<title>Starfield</title>
	</head>

r8n5n / responsive_iframe.html

Created January 22, 2016 16:24

Responsive iframe

	<!-- set the max width accordingly -->
	<div style="margin: 0 auto; max-width: 960px; position: relative;">
	<!-- set the padding % as the aspect ratio of the content e.g. 960/560 = 5.833333 -->
	<div style="padding-bottom: 58.33333333%;">
	<!-- the width=1; max-width=100% is for iOS -->
	<iframe scrolling="no" src="urls/to/iframe.html" style="position: absolute;width: 1px;min-width:100%;height: 100%;"></iframe>
	</div>
	</div>

r8n5n / randomPointInTriangle.js

Created January 22, 2016 16:19

Pick a random point within a triangle

	/**
	* Pick a random point within a triangle

	* @param {Object} a Point {x:# , y:#}
	* @param {Object} b Point {x:# , y:#}
	* @param {Object} c Point {x:# , y:#}
	* @returns Object {x:# , y:#}
	*
	* @see http://parametricplayground.blogspot.co.uk/2011/02/random-points-distributed-inside.html
	*/

r8n5n / MySQL distance

Created August 13, 2014 12:04

MySQL Function to get distance between 2 locations (lat,lon) in KM

	DELIMITER $$
	DROP FUNCTION IF EXISTS d $$
	CREATE FUNCTION d(lat1 FLOAT, lon1 FLOAT, lat2 FLOAT, lon2 FLOAT) RETURNS FLOAT
	DETERMINISTIC
	BEGIN
	DECLARE R FLOAT;
	DECLARE rad FLOAT;
	DECLARE a FLOAT;
	DECLARE d FLOAT;