Tutorial by Examples: i

This example illustrates how Go's type system can be used to implement some unit system. package main import ( "fmt" ) type MetersPerSecond float64 type KilometersPerHour float64 func (mps MetersPerSecond) toKilometersPerHour() KilometersPerHour { return KilometersPer...

We’ll first go over gaze-based interactions. Gaze-based interactions rely on rotating our heads and looking at objects to interact with them. This type of interaction is for headsets without a controller. Even with a rotation-only controller (Daydream, GearVR), the interaction is still similar. Sinc...

The cursor primitive is a reticle that allows for clicking and basic interactivity with a scene on devices that do not have a hand controller. The default appearance is a ring geometry. The cursor is usually placed as a child of the camera. <a-scene> <a-camera> <a-cursor>&...

The cursor builds on top of and depends on the raycaster component. If we want to customize the raycasting pieces of the cursor, we can do by changing the raycaster component properties. Say we want set a max distance, check for intersections less frequently, and set which objects are clickable: &l...

To add visual feedback to the cursor to show when the cursor is clicking or fusing, we can use the animation system. When the cursor intersects the entity, it will emit an event, and the animation system will pick up event with the begin attribute: <a-entity cursor="fuse: true; fuseTimeout:...

When the active property gets toggled, the component will notify the camera system to change the current camera used by the renderer: var secondCameraEl = document.querySelector('#second-camera'); secondCameraEl.setAttribute('camera', 'active', true);

To fix entities onto the camera such that they stay within view no matter where the user looks, you can attach those entities as a child of the camera. Use cases might be a heads-up display (HUD). <a-entity camera look-controls> <a-entity geometry="primitive: plane; height: 0.2; wi...

The camera primitive determines what the user sees. We can change the viewport by modifying the camera entity’s position and rotation. Note that by default, the camera origin will be at 0 1.6 0 in desktop mode and 0 0 0 in VR mode. Read about the camera.userHeight property. <a-scene> <...

To position the camera, set the position on a wrapper . Don’t set the position directly on the camera primitive because controls will quickly override the set position: <a-entity position="0 0 5"> <a-camera></a-camera> </a-entity>

A convenient way to package your application is to write the scripts in your packages.json file and run them with the npm run command { "name": "AppName", "productName": "AppName", "version": "0.1.1", "main": ...

The recommended way is to write a component, and attach it to the scene element. The scene and its children will be initialized before this component. AFRAME.registerComponent('do-something', { init: function () { var sceneEl = this.el; } }); <a-scene do-something></a-scene...

Detailed instructions on getting google-cloud-dataflow set up or installed.

$logger = $container->get('logger'); This will fetch the service with the service ID "logger" from the container, an object that implements Psr\Log\LoggerInterface.

MayaVI is a 3D visualization tool for scientific data. It uses the Visualization Tool Kit or VTK under the hood. Using the power of VTK, MayaVI is capable of producing a variety of 3-Dimensional plots and figures. It is available as a separate software application and also as a library. Similar to M...

To use Processing in Eclipse, start by creating a new Java project. Then, select File > Import and then choose General > File System to locate the core.jar file. It can be found in PATH_TO_PROCESSING/core/library/ for Windows or /Applications/Processing 3.app/Contents/Java/core/library/ for Ma...

##= # The variable $Bit will hold either 64 or 32 depending on system architecture # This is used with all the ${Service::} macros # Use this in the beginning of your code. # This snippet should only be used once. # Var Bit System::Call "kernel32::GetCurrentProcess()i.s" System::C...

##= #= Service::QueryConfig # # USAGE: # ${Service::QueryConfig} "NAME" /DISABLEFSR $0 $1 # # ::QueryConfig = The service's binary path is returned. # NAME = The Service name # /DISABLEFSR = Disables redirection if x64. Use "" to skip. # $0 ...

##= #= Service::State # # USAGE: # ${Service::State} "NAME" /DISABLEFSR $0 $1 # # ::State = The service's status is returned. # NAME = The Service name # /DISABLEFSR = Disables redirection if x64. Use "" to skip. # $0 = Return after call...

##= #= Service::Start # # USAGE: # ${Service::Start} "NAME" /DISABLEFSR $0 $1 # # ::Start = Start a service. # NAME = The Service name # /DISABLEFSR = Disables redirection if x64. Use "" to skip. # $0 = Return after call # $1 ...

##= #= Service::Stop # # USAGE: # ${Service::Stop} "NAME" /DISABLEFSR $0 $1 # # ::Stop = Sends a STOP control request to a service. # NAME = The Service name # /DISABLEFSR = Disables redirection if x64. Use "" to skip. # $0 = Return aft...