hololens | HoloLens projects. - | Game Engine library

I have a client-server app. The client is HoloLens 2 and the server is unity running on PC. I have created a socket using HoloLens but I can't read the byte array on HoloLens. In the connect method _inputStream and _outputStream are System.IO.Streams.

PC client uses System.Net.Sockets.TcpClient, System.Net.Sockets.NetworkStream but UWP (HoloLens) uses Windows.Networking.Sockets.StreamSocket.

In the ReceiveCallback I have an issue with int byteLenght = _inputStream.EndRead(result); When I tried this code on HoloLens I got the exception: "System.ArgumentException: The specified AsyncResult does not correspond to any outstanding IO operation". But I tested it with PC client (System.Net.Socket) and everything works fine.

Btw, I gave all related permissions.

How can I read byte array in UWP app?

Update:

I use HoloLens 2 as a client and my unity server on my PC. (More discussion about this: How can I read byte array coming from server in UWP app?) I lost my debug await reader1.LoadAsync(256);. I tried everything to get my stream data but I couldn't. I don't want to const value for the buffer I need the exact stream size for the buffer. I tested this and it works only and only if the buffer size and data stream size is equal. Or you can suggest me other approaches?

So i have been building Windows Mixed Reality ToolKit (MRTK) example project in Unity, and than attempt to deploy it to the Hololens 2 emulator from the Visual Studio 2019 editor, but every time it failed to run for a different reasons.
Some of the times VS2019 failed to deploy completely with the error:

I'm trying to use ClearScript in Unity, but fail because Unity does not see the DLL. To be sure, I cloned the project and had the DLLs built. I did this using the instructions from ClearScript.

The goal is to use the DLL on HoloLens, which in turn means I have UWP as the platform and ARM64 as the architecture. But I also want to have valid references during the implementation in Unity and not have constantly grayed out code because of the scripting symbols (such as UNITY_WSA).

So what did I do?

1. Screenshot - I took the dlls out of the output-net4.5-folder and set the api compatibility level in unity to .NET 4.x. The red ones are the dlls that I need and the blue ones only if I realy need to use V8, like already mentioned by the instruction from ClearScript.
2. All the dlls, except "..win-x64|86.dll", are managed dlls and should work out of the box in unity. So this are the import settings for the managed dlls and the settings for the unmanaged|native dlls.

So what did I miss or what did I do wrong? I used in the past for example another javascript interpreter, called Jint, where I also just took the managed dll out of the .net-4.5-build folder, imported it under Assets/Plugins/Jint and used it in my code just by adding the using in my classes.

Good afternoon!

I'm trying to open a pdf located into knownfolders in an UWP Hololens app without results... Does anyone know how to proceed? I managed to open it and retrieve its page number by using:

I have encountered the following problem My task is as follows, I need to play streaming video (raw h264 video over UDP protocol) on a 3d object. At the moment I'm using FFmpegInteropX to set a MediaSource to a Windows object.Media.Playback.MediaPlayer. Media Player works in frame server mode, then I subscribe to the videoFrameAvailable event and transmit the resulting frame to Unity

The problem is that the performance on Hololens2 (UWP) is quite low, I can't get enough smoothness and low latency if I use texture sizes greater than 720x720. At the same time, if I run the application on a PC, I can play everything up to 4096x4096 smoothly and without delay. Perhaps someone has some ideas on how to improve performance on Hololens2?

I'm using Unity3D with MRTK for Hololens 2 development.

As you can see in the picture I gat a Square-Gameobject and a AppBar-Gameobject. The Square hast MRTK BoundsControl attached to it which make it transformable. The user can change the size and rotation of the Square with the handles.

On every change the user does the AppBar should stick to the left border of the Square.

The Object-Gameobject has a scale of: X: 1, Y: 1, Z: 1.
The Square-Gameobject has a scale of: X: 0.15, y: 0.15, Z: 0.009.

When I scale the Square with the handles only the scale of the Object changes the scale of the Square is staying the same all the time.

I already tried this code but it doesn't work properly:

I'm trying to open a PDF within a Unity app deployed to a Microsoft Hololens 2 using the MRTK. I want to use the integrated Edge Browser, that is able to load within the app and to run simulatenously. Edge by itself is also able to load pdf files. I expected using LaunchUri would open the file from a provided location

Is there a way to store and view eye tracking data like the size of the users pupils or the eye motion speed?

I am currently building a hololens 2 application in unity using MRTK. Now I would like to "record", store and view eye tracking data of the user.