Records of problems encountered in unity + hololens development

1.HoloLens Device camera description

The middle camera is for imaging 、 A camera for capturing pictures and recognizing gestures ; The cameras on both sides are space recognition cameras , Identify spatial location and environment .

2. stay Hololens In the development TCP signal communication , There is an error “ArgumentException: Value does not fall within the expected range” Solutions for

open Unity Under the installation folder …\Editor\Data\il2cpp\libil2cpp\os\Win32 file found SocketImpl.cpp, Delete the preceding annotation in the following code block - Yes, it is ：

             case kSocketOptionLevelIP:
-#ifdef SOL_IP
-                *system_level = SOL_IP;
-#else
                 *system_level = IPPROTO_IP;
-#endif

#if IL2CPP_SUPPORT_IPV6
             case kSocketOptionLevelIPv6:
-        #ifdef SOL_IPV6
-                *system_level = SOL_IPV6;
-        #else
                 *system_level = IPPROTO_IPV6;
-        #endif

3.Hololens Medium model or UI Monocular display problem

1. Use MRTK The built-in shader（MixedRealityToolkit Next ）;

2. If not used MRTK Medium shader, Modify the currently used shader：

（1） stay struct appdata Add

        UNITY_VERTEX_INPUT_INSTANCE_ID

（2） stay struct v2f Add

        UNITY_VERTEX_INPUT_INSTANCE_ID

        UNITY_VERTEX_OUTPUT_STEREO

（3） stay v2f vert (appdata_t v) Add

        UNITY_SETUP_INSTANCE_ID(v);

        UNITY_TRANSFER_INSTANCE_ID(v, o);

        UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);

（4） stay fixed4 frag (v2f i) : *** Add

        UNITY_SETUP_INSTANCE_ID(i);

4. adopt Type-C Line connection computer deployment application failed

 （1）. Make sure that the device is in the power on but not sleep state ( The power light is on ), Settings options on your computer and device " Developer model " It's on , Restart and try again

 （2）. Determine whether an application with the same signature has been installed on the lower device , If yes, uninstall first , Try again

 （3）. restart HoloLens equipment  , Try again

 （4）. Change USB Slot try , Change one Type-C Try the line

 （5）. Confirm the next installation vs Check whether or not USB connectivity , Restart after installation vs, Try again

 （6）. Pairing is required for the first deployment （VS When the pairing prompt appears , Input the deployment HoloLens Device pairing code , Pairing codes can be found in HoloLens Device settings --> Developer options --> View in pairing ）

If the order is down or not , Can pass Wireless remote deployment ：

（1） Make sure that the device is in the power on but not sleep state ( The power light is on ), Settings options on your computer and device " Developer model " It's on

（2） Make sure PC and HoloLens In the same segment

（3）vs Select in turn Release、ARM64、 Remote computer

 （4）vs Select debug in turn -->** Debug properties --> debugging , Then enter deployment... In the computer name field HoloLens equipment ip, Then click OK

 （5） Click the button below to deploy , Pairing is required for the first deployment （VS When the pairing prompt appears , Input the deployment HoloLens Device pairing code , Pairing codes can be found in HoloLens Device settings --> Developer options --> View in pairing ）, After pairing, wait for deployment to complete .

5. Modify the icon in the publishing settings and publish to HoloLens There is no change problem in

change Player Setting Software icon in 、 After the software opens the picture displayed in the pop-up window , You cannot overwrite a previously packaged VS Project release , Otherwise, the modification will not be applied , The packaged project shall be deleted and republished , Or release new projects .

6.HoloLens2+vuforia The screen jitter turns off VuforiaConfiguration --> Track Device Pose

7.unity Lightmaps baked in cannot be used in HoloLens It shows that

1. modify Project Setting->Graphics->Shader Stripping->Lightmap Modes Of Automatic by Custom, namely Lightmap mode from Automatically Change it to Customize To force the lightmap on

2. take MRTK Standard shaders （Shader） Add files to Project Setting->Graphics->Built-in Shader Settings->Always Included Shaders In the list , This will ensure that MRTK All compilation of shaders is included in your project .

8.HoloLens Open in ar（vuforia） The screen projection and other transmission pictures will be interrupted in an instant , However, the reconnection can be carried out normally ar Scanning recognition

9.HoloLens in UGUI Of Mask Component failure

because Depth Format choice 16-bit depth Lead to , There are two solutions ：

（1） modify 16-bit depth by 24-bit depth

（2） perhaps Mask Replace the component with Rect Mask 2D

10.HoloLens in UGUI Of InputField You can only enter but not delete

resolvent ：InputField Replace the component with MRTKUGUIInputField+UI_KeyboardInputField