mirror of
https://github.com/litruv/TobiiEyetracking.git
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105 lines
4.4 KiB
C++
105 lines
4.4 KiB
C++
/******************************************************************************
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* Copyright 2017- Tobii Technology AB. All rights reserved.
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*
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* @author Temaran | Fredrik Lindh | fredrik.lindh@tobii.com | https://github.com/Temaran
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******************************************************************************/
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#pragma once
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#if TOBII_EYETRACKING_ACTIVE
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#include "ITobiiEyeTracker.h"
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#include "TobiiPlatformSpecific.h"
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#include "TobiiInternalTypes.h"
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#include "tobii_gameintegration.h"
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#include "CoreMinimal.h"
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#include "Containers/Ticker.h"
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#include "GameFramework/PlayerController.h"
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#include "Slate/SceneViewport.h"
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/*
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* FTickerObjectBase here is ticked almost last in a frame.
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* The order seems to go 'IInputDevice', then shortly after that 'Actor/Components' and very late after that the 'TickerCore' and thereby also FTickerObjectBase.
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* No matter if we choose IInputDevice or FTickerObjectBase we will be working with complete physics data from the last frame.
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* Of course we would rather be working with current frame physics data, but doing that would make our data more TickGroup dependent.
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* Maybe that's fine, but seeing as our traces are not really precise anyways, I think the simplicity of design of using FTickerObjectBase wins out.
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*
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* The big alternative would be to move all GTOM related objects to an actor that belongs to the PostPhysics tick group together with the focus managers and introduce a tick dependency.
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* See FEngineLoop::Tick() for more detailed info.
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*/
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class FTobiiEyeTracker : public ITobiiEyeTracker, public FTickerObjectBase
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{
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public:
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FTobiiEyeTracker();
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virtual ~FTobiiEyeTracker();
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virtual bool Tick(float DeltaTime) override;
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void Shutdown();
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bool IsConnectedToEyeTracker();
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/************************************************************************/
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/* ITobiiEyetracker */
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/************************************************************************/
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public:
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virtual const FTobiiGazeData& GetCombinedGazeData() const override;
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virtual const FTobiiGazeData& GetLeftGazeData() const override;
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virtual const FTobiiGazeData& GetRightGazeData() const override;
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virtual ETobiiGazeTrackerStatus GetGazeTrackerStatus() const override;
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virtual bool GetGazeTrackerCapability(ETobiiGazeTrackerCapability Capability) const override;
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virtual const FHitResult& GetCombinedWorldGazeHitData() const override;
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virtual const FHitResult& GetLeftWorldGazeHitData() const override;
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virtual const FHitResult& GetRightWorldGazeHitData() const override;
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virtual const FTobiiDisplayInfo& GetDisplayInformation() const override;
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virtual const FTobiiHeadPoseData& GetHeadPoseData() const override;
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virtual const FTobiiDesktopTrackBox& GetDesktopTrackBox() const override;
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virtual const FRotator& GetInfiniteScreenAngles() const override;
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public:
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virtual void SetEyeTrackedPlayer(APlayerController* PlayerController) override;
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virtual bool IsStereoGazeDataAvailable() const override { return bIsXR; }
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virtual bool GetEyeTrackerGazeData(FEyeTrackerGazeData& OutGazeData) const override;
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virtual bool GetEyeTrackerStereoGazeData(FEyeTrackerStereoGazeData& OutGazeData) const override;
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virtual EEyeTrackerStatus GetEyeTrackerStatus() const override;
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private:
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TobiiGameIntegration::ITobiiGameIntegrationApi* TgiApi;
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FTobiiPlatformNotifications PlatformNotifications;
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TWeakObjectPtr<APlayerController> ActivePlayerController;
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FHitResult CombinedWorldGazeHitData;
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FHitResult LeftWorldGazeHitData;
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FHitResult RightWorldGazeHitData;
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FTobiiGazeData LeftGazeData;
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FTobiiGazeData RightGazeData;
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FTobiiGazeData CombinedGazeData;
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ETobiiGazeTrackerStatus GazeTrackerStatus;
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FTobiiHeadPoseData HeadPoseData;
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FTobiiDisplayInfo DisplayInfo;
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FRotator InfiniteScreenAngles;
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FTobiiDesktopTrackBox DesktopTrackBox;
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FTobiiRawGazePoint RawGazePoint;
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FTobiiRawHeadPose RawHeadPose;
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FVector PrevCombinedGazeDirection;
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bool bIsXR;
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int64 GazeDataTimeStampMicroSecs;
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uint64 GazePointDeltaTimeMicroSecs;
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double CurrentAverageGazeAngularSpeedDegPerMicroSecs;
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FDateTime StartTime;
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void ResetData();
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bool UpdateLowLevelResources();
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void TickDesktop(float DeltaTime);
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void TickXR(float DeltaTime);
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void UpdateWorldSpaceData(float DeltaTime);
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void UpdateStabilityData(float DeltaTime);
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FVector2D ConvertRawGazePointUNormToGameViewportCoordinateUNorm(FSceneViewport* GameViewport, const FVector2D& InNormalizedPoint);
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FVector2D& TickEmulatedGazePointUNorm(float DeltaTime);
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};
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#endif //TOBII_EYETRACKING_ACTIVE
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