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SpectatorView.Example.Unity

This sample shows how to use QR Code detection to spatially align devices in the physical world.

Sample Project Contents

Once connecting a mobile device to the HoloLens experience, the mobile device should display a rotating, transparent cube that contains a sphere. The HoloLens will show its user an additional object that has been tagged as hidden to the mobile device spectator.

Building and Running the Sample

In order to run the demo, you will need a HoloLens and an AR capable mobile device. Once you have the devices ready, follow the instructions below.

ARKit Note: If you wish to run the experience on an iOS device with ARKit, download the ARKit repository, unzip it, and copy the contents of the Unity-Technologies-unity-arkit-plugin-94e47eae5954/Assets folder to /samples/SpectatorView.Example.Unity/Assets/.

Instructions

These instructions assume that a HoloLens device will be used to host the shared experience and that a mobile phone will be used to spectate the shared experience.

Prepare your local codebase

  1. Run tools/Scripts/SetupRepository.bat (tools/Scripts/SetupRepository.sh on Mac) to setup your local version of the code base. This script will obtain the external dependencies required for building this project.
  2. If you are using a HoloLens 1 device, build the SpectatorView.OpenCV.dll plugin and include it in the SpectatorView.Unity codebase. Instructions for building and adding SpectatorView.OpenCV.dll to the Spectator View codebase can be found here.

Prepare your devices

  1. Connect your devices to the same WiFi network.
  2. Obtain and write down your HoloLens's IP Address (This can be found in the settings menu).

Configure your project

  1. Open the SpectatorView.Example.Unity project in Unity.
  2. Run Spectator View -> Update All Asset Caches from the Unity toolbar.
  3. If building for HoloLens 2, ensure that QRCODESTRACKER_BINARY_AVAILABLE has been defined as a Scripting Define Symbols in your WSA Unity Player Settings. If you have made no changes to the SpectatorView.Examples.Unity project definition, this should already be defined (Player settings can be found under Build Settings -> Player Settings).
  4. If building for HoloLens 1, ensure that SpectatorView.OpenCV.dll exists in the project's Assets folder. It should have been placed under Assets\MixedReality-SpectatorView\SpectatorView.Native\Plugins\WSA\x86 when going through the compilation instructions here.

Build & Deploy

HoloLens
  1. Select HoloLens as your target platform using Spectator View's PlatformSwitcher (This can be found in the Unity inspector for the SpectatorView prefab GameObject).
  2. Build UWP Player containing MixedReality-SpectatorView/SpectatorView/Scenes/SpectatorView.HoloLens scene, and deploy this application to the HoloLens device.
  3. Launch SpectatorView.Example.Unity on the HoloLens and wait for the experience to start.

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Android
  1. Select Android as your target platform using Spectator View's PlatformSwitcher (This can be found in the Unity inspector for the SpectatorView prefab GameObject).
  2. Include and check MixedReality-SpectatorView/SpectatorView/Scenes/SpectatorView.Android.unity as Scene 0 in your Unity Build Settings.
  3. Include and check MixedReality-SpectatorView/SpectatorView/Scenes/SpectatorView.HoloLens.unity as Scene 1 in your Unity Build Settings.
  4. Build and Run the Android Player through Unity's Build Settings.
  5. Launch SpectatorView.Example.Unity on the Android device and connect to the HoloLens device by specifying the HoloLens's IP Address.

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iOS
  1. Select iOS as your target platform using Spectator View's PlatformSwitcher (This can be found in the Unity inspector for the SpectatorView prefab GameObject).
  2. Include and check MixedReality-SpectatorView/SpectatorView/Scenes/SpectatorView.iOS.unity as Scene 0 in your Unity Build Settings.
  3. Include and check MixedReality-SpectatorView/SpectatorView/Scenes/SpectatorView.HoloLens.unity as Scene 1 in your Unity Build Settings.
  4. Build the iOS Player through Unity's Build Settings.
  5. Launch SpectatorView.Example.Unity on the iOS device and connect to the HoloLens device by specifying the HoloLens's IP Address.

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Note 1: Additional setup instructions and troubleshooting for spectating with mobile devices can be found here.

Troubleshooting

Additional Issues

For more information on troubleshooting other build issues, checkout the Troubleshooting section in our detailed setup steps here.