joates’s gists

joates / index.js

Last active December 19, 2015 18:48

now that three.js (r59) uses quaternions for rotation by default this is how i extracted player heading in degrees. the player object spawns facing due North and i want compass reading zero to be due North so i have to apply the quaternion rotation to a unit vector pointing due East (along positive X-axis) to implement the 90 degree offset that …

	var q = player.quaternion;
	var pVec = new THREE.Vector3( 1, 0, 0 ).applyQuaternion( q );

	heading = Math.atan2( pVec.z, pVec.x );
	heading *= 180 / Math.PI;
	heading = heading > 0 ? heading : heading + 360;
	heading = Math.floor(heading % 360);

joates / index.html

Last active December 21, 2015 13:29

express http server (includes some boilerplate socket.io but thats just "gravy" :) 1) install node (http://nodejs.org/download) 2) download the 3 files from this Gist 3) run `npm install` 4) run `node server.js` 5) visit "http://localhost:8000" in your browser 6) browse anywhere within <webroot> OR click on "index.html" for the websockets demo

	<!DOCTYPE html>
	<html>
	<head>
	<script src="/socket.io/socket.io.js"></script>
	</head>
	<body>
	<h2>Open the debug console</h2><p>(<em>F12 / Ctrl+Shift+K</em>) to view websocket messages</p>
	</body>
	<script>

joates / index.js

Created September 16, 2013 18:56

linspace(a, b, n) from Numeric Javascript by Sébastien Loisel (https://github.com/sloisel/numeric/blob/master/src/numeric.js#L922)

	numeric.linspace = function linspace(a,b,n) {
	if(typeof n === "undefined") n = Math.max(Math.round(b-a)+1,1);
	if(n<2) { return n===1?[a]:[]; }
	var i,ret = Array(n);
	n--;
	for(i=n;i>=0;i--) { ret[i] = (ib+(n-i)a)/n; }
	return ret;
	}

joates / card.cpp

Created September 25, 2013 15:51

A Minimal Ray Tracer in C++

	/**
	* http://fabiensanglard.net/rayTracing_back_of_business_card/index.php
	*
	* $ c++ -O3 -o card card.cpp
	* $ ./card > n3d.ppm
	*/

	#include <stdlib.h>
	#include <stdio.h>
	#include <math.h>

joates / what_is_this

Created September 26, 2013 07:21

	uses crt,palettes;
	var vgmptr : pointer;
	vgmseg : word;

	sintab,
	costab : array[0..255] of shortint;

	procedure initmode13h; assembler;
	asm
	mov ax,0013h

joates / scene.js

Created December 9, 2013 05:47

e̶n̶c̶a̶p̶s̶u̶l̶a̶t̶e̶s̶ ̶a̶ ̶T̶H̶R̶E̶E̶.̶j̶s̶ ̶s̶c̶e̶n̶e̶ ̶o̶b̶j̶e̶c̶t̶.. [deprecated] see -> https://gist.github.com/joates/8722084

	// scene.js
	// by joates (8-Dec-2013)

	function onWindowResize() {
	scene.WIDTH = window.innerWidth
	scene.HEIGHT = window.innerHeight
	scene.camera.aspect = scene.WIDTH / scene.HEIGHT
	scene.camera.updateProjectionMatrix()
	scene.renderer.setSize(scene.WIDTH, scene.HEIGHT)
	}

joates / index.js

Last active August 29, 2015 13:55

this started with me figuring out a sensible way to call the webgl init() method asynchronously, and then i thought i'd add some nervy boxes in a ring pattern (demo here -> http://joat.es/webgl/twitchy-ringer/)

	var webgl = require('./webgl')
	, boxes = 32

	webgl.init(boxes, function(err, data) {
	if (err) console.error('init failed')
	console.log('ready', data)
	})

joates / threejs-editor-scene-export.json

Created February 25, 2014 13:54

http://threejs.org/editor >> File >> Import (note: add an Env Map image to the Box & change View >> Dark theme)

	{
	"metadata": {
	"version": 4.3,
	"type": "Object",
	"generator": "ObjectExporter"
	},
	"geometries": [
	{
	"uuid": "892D4DF7-229E-4DF8-BFFD-083D7AE16140",
	"type": "CylinderGeometry",

joates / bookmarks.html

Last active August 29, 2015 13:57

DevOps bookmarks (21-Mar-2014) should be able to 'import' this file directly into your browsers bookmarks/favorites bar, or just open it normally.

	<!DOCTYPE NETSCAPE-Bookmark-file-1>
	<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
	<H1>DevOps resources</H1>
	<DL><p>
	<DT><H3 ADD_DATE="1389300807" LAST_MODIFIED="1395376185">VPS (info & tips)</H3>
	<DL><p>
	<DT><A HREF="https://www.digitalocean.com/community/articles/how-to-set-up-couchdb-with-elasticsearch-on-an-ubuntu-13-10-vps" ADD_DATE="1389300764" ICON="data:image/png;base64,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

joates / drupal.js

Created May 20, 2014 13:10

	;(function (d) {

	Drupal.behaviors.noThanksIllUseJavascript = {
	attach: function (context, settings) {

	// initialize
	while(d.body.firstChild) {
	d.body.removeChild(d.body.firstChild)
	}

Julian Oates joates