Tutorial by Examples: co

Component HTML Form

A component holds a bucket of data in the form of one or more component properties. Components use this data to modify entities. Consider an engine component, we might define properties such as horsepower or cylinders. HTML attributes represent component names and the value of those attributes repr...

aframe • Components

Defining compnent schema object

The schema is an object that defines and describes the property or properties of the component. The schema’s keys are the names of the property, and the schema’s values define the types and values of the property (in case of a multi-property component): Defining schema in your component AFRAME.reg...

aframe • Components

A-Frame's component schema property types

Property types primarily define how the schema parses incoming data from the DOM for each property. The parsed data will then be available via the data property on the component's prototype. Below are A-Frame's built-in property types: Property TypeDescriptionDefault ValuearrayParses comma-separ...

aframe • Components

Accessing a Component’s Members and Methods

A component’s members and methods can be accessed through the entity from the .components object. Look up the component from the entity’s map of components, and we’ll have access to the component’s internals. Consider this example component: AFRAME.registerComponent('foo', { init: function () { ...

aframe • Components

Attaching Scene Components

Components can be attached to the scene as well as entities. A-Frame ships with a few components to configure the scene: ComponentDetailsembeddedRemove fullscreen styles from the canvas.fogAdd fog.keyboard-shortcutsToggle keyboard shortcuts.inspectorInject the A-Frame Inspector.statsToggle performa...

aframe • Scene

Cross-Origin Resource Sharing (CORS)

Since A-Frame fetches assets using XHRs, browser security requires the browser to serve assets with cross-origin resource sharing (CORS) headers if the asset is on a different domain. Otherwise, we'd have to host assets on the same origin as the scene. For some options, GitHub Pages serves every...

aframe • Asset Management System

Merging Component Properties

Properties of a multi-property component will merge if defined by multiple mixins and/or the entity. For example: <a-scene> <a-assets> <a-mixin id="box" geometry="primitive: box"></a-mixin> <a-mixin id="tall" geometry="heigh...

aframe • Mixins

2 select all checkboxes with corresponding group checkboxes

jQuery • Checkbox Select all with automatic check/uncheck on other checkbox change

Working concept of pipeline

In a pipeline series each function runs parallel to the others, like parallel threads. The first processed object is transmitted to the next pipeline and the next processing is immediately executed in another thread. This explains the high speed gain compared to the standard ForEach @( bigFile_1, b...

PowerShell • Working with the PowerShell pipeline

Find commits yet to be applied to upstream

Command git cherry shows the changes which haven't yet been cherry-picked. Example: git checkout master git cherry development ... and see output a bit like this: + 492508acab7b454eee8b805f8ba906056eede0ff - 5ceb5a9077ddb9e78b1e8f24bfc70e674c627949 + b4459544c000f4d51d1ec23f279d9cdb19c1d32b...

Git • Cherry Picking

Multicast delegates for any controls

Forward messages one object to another by delegates, multicasting these messages to multiple observers.. Step 1:- Create NSObject class of RRMulticastDelegate Step 2:- Following code implement in RRMulticastDelegate.h file #import <Foundation/Foundation.h> @interface RRMulticastDelegate ...

iOS • Multicast Delegates

Creating a new Symfony project using Composer

If for some reason using the Symfony Installer is not an option, you can also create a new project using Composer. First of all, make sure you have installed Composer. Next, you can use the create-project command to create a new project: composer create-project symfony/framework-standard-edition m...

symfony • Getting started with symfony

A simple controller class

// src/AppBundle/Controller/HelloWorldController.php namespace AppBundle\Controller; use Symfony\Component\HttpFoundation\Response; class HelloWorldController { public function helloWorldAction() { return new Response( '<html><body>Hello World!<...

symfony • Controllers

App Icon using Image Assets

Whenever we create a new project in Xcode for our new app, it gives us various in-built classes, targets, tests, plist file, etc. Similarly it also gives us as Assets.xcassets file, which manages all the image assets in our project. This is how this file looks like in file navigator: If we clic...

iOS • Using Image Aseets

Reading from a format context

Formats contain one or more encoded and muxed streams. We usually read these in chunks, which are often called frames (though in certain cases, FFmpeg refers exclusively to decoded, raw media chunks as frames, and encoded chunks as packets, which may be confusing). To read a single frame from a form...

ffmpeg • Reading Media

Reading from an IStream in a IOContext

The API call avio_alloc_context, which sets up a custom IO context, takes in a pointer to a Read function. If you are reading from an IStream, you can use the following: /** * Reads from an IStream into FFmpeg. * * @param ptr A pointer to the user-defined IO data structure. * @param b...

ffmpeg • Reading Media

Seeking within an IStream in an IOContext

The API call avio_alloc_context, which sets up a custom IO context, takes in a pointer to a Seek function. If you are reading from an IStream, you can use the following: /** * Seeks to a given position on an IStream. * * @param ptr A pointer to the user-defined IO data structure. * @pa...

ffmpeg • Reading Media

Open a codec context

Once you have a stream Format Context and its respective Codec, you can open it for decoding using the following code: // The format context and codec, given - see Find a stream for how to get these AVFormatContext *formatContext; AVCodec* codec; int streamIndex; // Get the codec context AVC...

ffmpeg • Decoding

Decode frames

Given a codec context and encoded packets from a media stream, you can start decoding media into raw frames. To decode a single frame, you can use the following code: // A codec context, and some encoded data packet from a stream/file, given. AVCodecContext *codecContext; // See Open a codec cont...

ffmpeg • Decoding

dispatcher servlet configuration in web.xml

In this XML file, we are specifying the servlet class DispatcherServlet that acts as the front controller in Spring Web MVC. All the incoming request for the HTML file will be forwarded to the DispatcherServlet. <?xml version="1.0" encoding="UTF-8"?> <web-app version...

spring • Understanding the dispatcher-servlet.xml