add support for htc vive wrist trackers on android

Source/SenseGloveSettings/Private/SGSettings/SGWristTrackingSettings.cpp

@@ -37,6 +37,7 @@
 
 FSGWristTrackingSettings::FSGWristTrackingSettings()
     : FSGWristTrackingSettings{
+        ESGOpenXRPositionalTrackingProvider::None,
         ESGPositionalTrackingHardware::None,
         FVector::ZeroVector,
         FVector::ZeroVector,
@@ -44,12 +45,13 @@ FSGWristTrackingSettings::FSGWristTrackingSettings()
         FRotator::ZeroRotator,
         FName{TEXT("Left")},
         FName{TEXT("Right")},
-        FSGWristTrackingDebuggingSettings{}
+        FSGWristTrackingDebuggingSettings{},
     }
 {
 }
 
 FSGWristTrackingSettings::FSGWristTrackingSettings(
+    const ESGOpenXRPositionalTrackingProvider InOpenXRPositionalTrackingProvider,
     const ESGPositionalTrackingHardware InTrackingHardware,
     const FVector& InTrackingHardwareLocationOffsetLeftHand,
     const FVector& InTrackingHardwareLocationOffsetRightHand,
@@ -58,7 +60,8 @@ FSGWristTrackingSettings::FSGWristTrackingSettings(
     const FName InLeftHandMotionSource,
     const FName InRightHandMotionSource,
     const FSGWristTrackingDebuggingSettings& InDebuggingSettings)
-    : TrackingHardware(InTrackingHardware),
+    : OpenXRPositionalTrackingProvider(InOpenXRPositionalTrackingProvider),
+      TrackingHardware(InTrackingHardware),
       TrackingHardwareLocationOffsetLeftHand{InTrackingHardwareLocationOffsetLeftHand},
       TrackingHardwareLocationOffsetRightHand{InTrackingHardwareLocationOffsetRightHand},
       TrackingHardwareRotationOffsetLeftHand{InTrackingHardwareRotationOffsetLeftHand},

Source/SenseGloveSettings/Public/SGSettings/SGWristTrackingSettings.h

@@ -44,6 +44,7 @@
 
 #include "SGSettings/SGWristTrackingDebuggingSettings.h"
 #include "SGTypes/SGCoreTypes.h"
+#include "SGTypes/SGTrackingTypes.h"
 
 #include "SGWristTrackingSettings.generated.h"
 
@@ -58,6 +59,33 @@ struct SENSEGLOVESETTINGS_API FSGWristTrackingSettings
     GENERATED_USTRUCT_BODY()
 
 public:
+    /**
+     * Specifies the type of OpenXR provider to use in order to extract the positional tracking data from the
+     * underlying XR system. If set to None, the plugin attempts to set this automatically by considering a combination
+     * of approaches including, the current value of `TrackingHardware` specified below, the platform it's targeted at,
+     * the available OpenXR plugins, along with HMD auto-detection mechanism to specify a compatible OpenXR tracking
+     * provider. Please note that the OpenXR provider depends on the combination of plugins, platform, and the settings
+     * you use. For example, it is possible to use a Vive Focus 3 Wrist Tracker on Microsoft Windows along with the
+     * Epic `OpenXRViveTracker` plugin and check the option `Emulate VIVE Wrist Tracker as VIVE Tracker` inside the
+     * VIVE Business Streaming application's Input settings. In that case, the correct OpenXR positional tracking
+     * provider to use would be `OpenXRViveTracker`. However, using the official ViveOpenXR plugin on Android, the
+     * correct OpenXR provider would be `OpenXRViveWristTracker`.
+     *
+     * Caution:
+     * HMD auto-detection is currently an experimental feature and may fail because HMD vendors occasionally change the
+     * properties utilized by the plugin for HMD detection. If you encounter issues, such as incorrect tracker offsets,
+     * it is recommended to explicitly specify the tracking hardware.
+     *
+     * Caution:
+     * Due to highly experimental nature of the HMD auto-detection feature, the HTC VIVE Focus Vision, HTC VIVE XR
+     * Elite, and HTC VIVE Focus Vision cannot be distinguished from each other in the current iteration. However,
+     * since the tracker devices and offsets for all these headsets are the same, this should not affect the
+     * performance or  any functionality. The order in which the HMD is detected can be specified through the
+     * HMD-tracker setting `ViveHMDDetectionPriority`.
+     */
+    UPROPERTY(Config, EditDefaultsOnly, Category = "Wrist Tracking")
+    ESGOpenXRPositionalTrackingProvider OpenXRPositionalTrackingProvider;
+
     /**
      * Specifies the type of tracking hardware to use. If set to None, the plugin attempts at HMD auto-detection to
      * automatically specify a compatible tracking hardware. If set to `Custom`, any desired location and rotation can
@@ -150,6 +178,7 @@ public:
     FSGWristTrackingSettings();
 
     FSGWristTrackingSettings(
+        const ESGOpenXRPositionalTrackingProvider InOpenXRPositionalTrackingProvider,
         ESGPositionalTrackingHardware InTrackingHardware,
         const FVector& InTrackingHardwareLocationOffsetLeftHand,
         const FVector& InTrackingHardwareLocationOffsetRightHand,