Integrating Angular js & three.js

Josh Staples
@cubicleDowns
blog.tempt3d.com
github.com/cubicleDowns/ng-three-viewer

WHO? Software Engineer @ napofearth.com
“Explore Music Visually” PRIVATE BETA (#ngmeetup)

TODAY
1. (v1) Angular & Three.js 3D Model Viewer
2. (v2) “Controller as” &
prototypal Angular components
3. Grunt & Closure compilation approaches
4. (v3*) Scoped scene graph

WHY?
Great pattern(s) with low barrier of entry
& high productivity
All web devs can easily be 3D web devs
Isolate THREE code from Angular UI/UX code!

THREE WHAT?
threejs.org three features
● Renderers
● Scene Graph
● Cameras
● Animation
● Lights
● Materials
● Shaders
● Objects
● Geometry
● Loaders
● Utilities
● Export/Import
● Support
● Examples
● WebVR
● DIYVR
Started by Mr. Doob on April 23, 2010

Demo v1
http://localhost:8000/v1/dist/

CONTROLLER
AppController
CONTROLLER
FileLoaderController
UI Elements and Controllers
DIRECTIVE INCLUDE
file-loader.html
DIRECTIVE INCLUDE
about.html
DIRECTIVE INCLUDE
chrome.html
DIRECTIVE INCLUDE
toolbar.html

CONTROLLER
Dependency Injections Across Angular Components
CONTROLLER
AppController
DIRECTIVE
select
SERVICE
StorageService
SERVICE
MessageBus
FACTORY
Viewer

Viewer.factory('ViewerFactory', … ) {
init()
home = new Viewer.Scene()
animate ()
render ()
makeSelection ()
loadOBJMTL ()
loadGLTF ()
loadOBJ ()
loadJSON ()
scale ()
rotate ()
/** Translate the model along an axis
* @param {number} x
* @param {number} y
* @param {number} z */
translate (x,y,z)
home.wrangler.currentModel.position.set(x, y, z);
CONTROLLER
AppController
● init ()
● rotate ()
● scale ()
● translate ()
SERVICE
MessageBus
DIRECTIVE
select
● makeSelection ()
CONTROLLER
● loadOBJMTL ()
● loadGLTF ()
● loadOBJ ()
● loadJSON ()
Viewer Factory Interface

Viewer Factory Architecture
Viewer Factory Singleton
function init(params) {
home = new Viewer.Scene(params);
animate();
}
Viewer.Scene()
this.scene
THREE.Scene()
this.renderer
THREE.WebGLRenderer()
this.wrangler
Viewer.Wrangler()
function animate () {
requestAnimationFrame(animate);
render();
}
this.setup
Viewer.Setup()
this.cameras
Viewer.Cameras()
this.controls
THREE.OrbitControls()
this.raycaster
THREE.Raycaster()

USE CASE - User Click, Intersect 3D Model, Return Model Information
Angular Directive, <canvas select>
elem.on(tap, function(e)
x = e.gesture.center.x;
y = e.gesture.center.y;
// creating NDC coordinates for ray intersection.
mouseDown.x = (x / width) * 2 - 1;
mouseDown.y = -(y / height) * 2 + 1;
ViewerFactory.makeSelection(mouseDown);
Viewer Factory, makeSelection
makeSelection(mouse):
Angular Controller/Factory
$scope.$on(‘objectSelected’, function () {
// Do Something.
});
var vector = new THREE.Vector3( mouse.x, mouse.y, 1).unproject(home.cameras.liveCam);
home.raycaster.set(home.cameras.liveCam.position, vector.sub(home.cameras.liveCam.position).normalize());
var intersected = home.raycaster.intersectObjects(home.wrangler.currentModel, true);
MessageBus.trigger('objectSelected', intersected[0])

MOST PROFITABLE MOVIE?
THE SEQUEL!

STARRING
“Controller as”
&
as ctrl
Annotations
as SNAFU

Sequel (v2)
http://localhost:8000/v2/dist/

Controller as
<div id="file-loader" ng-controller="FileLoaderController as loader" ng-show=”loader.visible”>
<input type="text" ng-model="loader.data.obj" placeholder="obj file url">
<input type="text" ng-model="loader.data.name" placeholder="unique name">
<button ng-click="otherLoader.loadOBJMTL()">Load OBJ/MTL</button>
<button ng-click="loader.loadSampleOBJMTL()">SAMPLE OBJ-MTL</button>
Controller
level scope
:)
<div id="file-loader" ng-controller="FileLoaderController" ng-show=”visible”>
- - -
<input type="text" ng-model="data.obj" placeholder="obj file url">
<input type="text" ng-model="data.mtl" placeholder="mtl file url">
<button ng-click="loadOBJMTL()">Load OBJ/MTL</button>
<button ng-click="loadSampleOBJMTL()">SAMPLE OBJ-MTL</button>
nearest scope
:(

Service, !Factory
Viewer.ViewerService
.prototype
init
listeners
animate
render
makeSelection
loadOBJMTL
loadOBJ
loadGLTF
loadJSON
rotate
translate
scale
● No More Factories
○ closure pattern
● Instead, prototypal Service
○ ‘new’ and this
○ .bind() for callbacks
● Saves Memory, Time, Searches (sorry)
● Single Pattern For Everything!
● IMHO, the best way to code JS

/** @ngInject */
Viewer.ViewerService = function($timeout, MessageBus){
this.timeout = $timeout;
this.MessageBus = MessageBus;
};
Viewer.ViewerService.prototype.init = function (params){
this.home = new Viewer.Scene(params);
this.MessageBus.trigger(‘app-ready’);
animate();
};
Viewer.factory('ViewerFactory', ['MessageBus', function (MessageBus)
function init () {}
function makeSelection() {}
return {
init: init,
makeSelection: makeSelection
}
closure style,
ng-annotate
:
prototypal
:)
Prototypal Angular

CAonnntorotallteior nass
/** Service which initiates the THREE.js scene and
* provides methods to interact with that scene
*
* @param {angular.$timeout} $timeout
* @param {!Viewer.MessageBus} MessageBus
* @constructor
* @ngInject
*/
Viewer.ViewerService = function($timeout, MessageBus){
this.timeout = $timeout;
this.MessageBus = MessageBus;
};
/**
* Translate the model along an axis
* @param {number} x
* @param {number} y
* @param {number} z
*/
Viewer.ViewerService.prototype.translate = function(x, y, z){
this.home.wrangler.currentModel.position.set(x, y, z)
};
/**
* @param {number} s
*/
Viewer.ViewerService.prototype.scale = function(s) {
this.home.wrangler.currentModel.scale.set(s, s, s);
};
The Closure Compiler can use data type
information about JavaScript variables to provide
enhanced optimization and warnings.

APP INIT (app.js)
angular.module('ThreeViewer', ['ngHammer', 'ngRoute', 'LocalStorageModule'])
.config(['localStorageServiceProvider',function(localStorageServiceProvider){
….
.config(['$locationProvider', function($locationProvider) {
….
$locationProvider.html5Mode(true);
.config(['$routeProvider', function($routeProvider){
angular.module('ThreeViewer', ['ngRoute', 'LocalStorageModule'])
.config(ThreeViewer.ConfigLocation)
….
.directive('select', ['ViewerService', ThreeViewer.SelectDirective.factory])
….
.filter('forceInt', ThreeViewer.ForceInt.factory)
….
.service('ViewerService', [MessageBus', ThreeViewer.ViewerService])
….
.controller('AppController', ['$scope', 'ViewerService', ThreeViewer.AppController]);
v2
:)
v1
:

uglify: {
ng3: {
options: {
compress: {
drop_console: true
},
sourceMap: true,
},
files: {
'dist/app.min.js': ['<%= concat.ng3.dest %>']
}
}
},
command: 'java -jar closure/compiler.jar ' +
'--compilation_level SIMPLE_OPTIMIZATIONS' +
'--language_in ECMASCRIPT5_STRICT ' +
'--angular_pass ' +
'--externs closure/externs/angular-1.3.js ' +
'--externs closure/externs/three.js ' +
'--generate_exports ' +
'--manage_closure_dependencies ' +
'--js closure/library/base.js ' +
'--js <%= app %> ' +
'--js <%= ng %> ' +
'--js <%= three %> ' +
'--js_output_file dist/app.min.js'
Minify or Closure Compilation?
Closure Compiler
● type checking
● ngInject
● goog.provide / require
Grunt ng-annotate
● uglify
● ng-annotate

NOGN Eto A TPHPR, ETEWO PATTERNS
V1
● Most Common Angular Pattern
● Grunt uglify / minify
● Factories
● Services
● Filters
● Directives
● Init controllers from DOM
V2
● Prototypal Pattern for Everything!
● Bridge to Angular 2.0
● Controller as (local scope)
● Closure Compilation
○ type checking
○ -- angular_pass
○ dependency chains
○ minification
● App.js Initialization
● No closure pattern (factories)

JNOGIN t oU TSH! REE Mobile Developer - Backend Guru
napofearth.com/jobs UI/UX Designer - QA #ngmeetup

Integrating Angular js & three.js

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