HL2UnityPlugin

HoloLens2-ResearchMode-Unity

Unity Plugin for using research mode functionality in HoloLens 2. Modified based on HoloLens2ForCV.

Skeleton to wrap HoloLens 2 research mode api into Windows Runtime extension.

To use it in Unity,

• Build this project (ARM64,Release) and copy the .dll and .winmd files in HL2UnityPlugin\ARM64\Release\HL2UnityPlugin into Assets/Plugins/WSA/ARM64 folder of your Unity project.
• Change the architecture in your Unity build settings to be ARM64.
• After building the visual studio solution from Unity, go to App/[Project name]/Package.appxmanifest and add the restricted capability to the manifest file. (Same as what you would do to enable research mode on HoloLens 1, reference: http://akihiro-document.azurewebsites.net/post/hololens_researchmode2/)

<Package 
  xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest" 
  xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10" 
  xmlns:uap2="http://schemas.microsoft.com/appx/manifest/uap/windows10/2" 
  xmlns:uap3="http://schemas.microsoft.com/appx/manifest/uap/windows10/3" 
  xmlns:uap4="http://schemas.microsoft.com/appx/manifest/uap/windows10/4" 
  xmlns:iot="http://schemas.microsoft.com/appx/manifest/iot/windows10" 
  xmlns:mobile="http://schemas.microsoft.com/appx/manifest/mobile/windows10" 
  xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities" 
  IgnorableNamespaces="uap uap2 uap3 uap4 mp mobile iot rescap" 
  xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"> 

  <Capabilities>
    <rescap:Capability Name="perceptionSensorsExperimental" />
    <Capability Name="internetClient" />
    <Capability Name="internetClientServer" />
    <Capability Name="privateNetworkClientServer" />
    <uap2:Capability Name="spatialPerception" />
    <DeviceCapability Name="backgroundSpatialPerception"/>
    <DeviceCapability Name="webcam" />
  </Capabilities>

<DeviceCapability Name="backgroundSpatialPerception"/> is only necessary if you use IMU sensor.

• Save the changes and deploy the solution to your HoloLens 2.

Note:

• The reconstructed point cloud still has the offset problem as is described here for object beyond 1m.
• To visualize the depth image, you need a grayscale shader applied to your preview plane. Example: grayscale shader.
• For point cloud, current implementation only returns the reconstructed point cloud as a float array (in the format of x,y,z,x,y,z,...). If you want to visualize it, I find this project is a good example.
• This project is mainly to show how to use Reseach Mode in Unity. I only provided implementation on AHAT camera image visualization and point cloud reconstruction (based on depth map of AHAT camera), two front spatial camera. The long-throw depth sensor and IMU sensor are also available thanks to @HoloAdventure. Feel free to modify the code according to your own need.
• Only one of the short-throw(AHAT) and long-throw depth sensor should be enabled at the same time.
• If you need a sample project to get started, you can refer to UnitySample folder.