Attempted to execute getting the eye tracking data as an asynchronous task....

Attempted to execute getting the eye tracking data as an asynchronous task. Currently it does not compile, apparently the delegate is not defined correctly?

Source/StudyFrameworkPlugin/Private/GazeTracking/SFGazeTracker.cpp

@@ -22,17 +22,26 @@ bool USFGazeTracker::Tick(float DeltaTime)
 
 	TimeSinceLastEyeDataGather = 0.0f;
 
-	if(bEyeTrackingStarted)
+	if(bEyeTrackingStarted && !bIsAsyncEyeTrackingTaskRunning)
 	{
 #ifdef WITH_SRANIPAL
-		ViveSR::anipal::Eye::GetEyeData_v2(&SranipalEyeData);
-		bDataLogged = false;
+		bIsAsyncEyeTrackingTaskRunning = true;
+		ViveSR::anipal::Eye::EyeData_v2 TempEyeData;
+		AsyncTask(ENamedThreads::AnyThread, [TempEyeDataAddr = MoveTemp(&TempEyeData), OnEyeTrackingDataReceived]()
+			{				
+				ViveSR::anipal::Eye::GetEyeData_v2(TempEyeDataAddr);
+
+				AsyncTask(ENamedThreads::GameThread, [TempEyeDataAddr = MoveTemp(TempEyeDataAddr), OnEyeTrackingDataReceived]() mutable
+					{
+						OnEyeTrackingDataReceived.ExecuteIfBound(*TempEyeDataAddr);
+					});
+	
+			});		
 #endif
 	}
 	return true;
 }
 
-
 void USFGazeTracker::Init(EGazeTrackerMode Mode, bool IgnoreNonGazeTargetActors, float DataGatheringsPerSecond)
 {
 	bIgnoreNonGazeTargetActors = IgnoreNonGazeTargetActors;
@@ -238,6 +247,13 @@ float USFGazeTracker::GetPupilDiameter()
 	return 0.0f;
 }
 
+void USFGazeTracker::OnEyeTrackingDataReceived(ViveSR::anipal::Eye::EyeData_v2 EyeData)
+{
+	bIsAsyncEyeTrackingTaskRunning = false;
+	SranipalEyeData = EyeData;
+	bDataLogged = false;
+}
+
 FGazeRay USFGazeTracker::GetSranipalGazeRayFromData()
 {
 	FGazeRay GazeRay;

Source/StudyFrameworkPlugin/Public/GazeTracking/SFGazeTracker.h

 #pragma once
 
 #include "CoreMinimal.h"
-
+#include "Async/Async.h"
 
 #ifdef WITH_SRANIPAL
 #include "Eye/SRanipal_API_Eye.h"
@@ -9,6 +9,11 @@
 
 #include "SFGazeTracker.generated.h"
 
+#ifdef WITH_SRANIPAL
+//Use this to broadcast the data from async thread to game thread for logging
+DECLARE_DYNAMIC_DELEGATE_OneParam(FOnEyeTrackingDataReceived, const ViveSR::anipal::Eye::EyeData_v2, EyeData);
+#endif
+
 UENUM()
 enum class EGazeTrackerMode : uint8
 {
@@ -76,13 +81,17 @@ public:
 	bool bDebugRenderRayTraces = false;
 
 
-
+#ifdef WITH_SRANIPAL
+	FOnEyeTrackingDataReceived& OnEyeTrackingDataReceived;
+	void OnEyeTrackingDataReceived(ViveSR::anipal::Eye::EyeData_v2 EyeData);
+#endif
 private:
 
 	FGazeRay GetSranipalGazeRayFromData();
 
 	bool bEyeTrackingStarted = false;
 
+	bool bIsAsyncEyeTrackingTaskRunning = false;
 	bool bIgnoreNonGazeTargetActors = false;
 	UPROPERTY()
 	TArray<AActor*> ActorsToIgnore;