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https://github.com/litruv/TobiiEyetracking.git
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Added Tobii from 4.23 + updated
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/******************************************************************************
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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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#include "TobiiAimAtGazeComponent.h"
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#include "TobiiInteractionsBlueprintLibrary.h"
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#include "TobiiInteractionsInternalTypes.h"
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#include "TobiiGTOMBlueprintLibrary.h"
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#include "DrawDebugHelpers.h"
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#include "Engine/World.h"
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#include "GameFramework/Pawn.h"
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#include "GameFramework/PlayerController.h"
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#include "HAL/IConsoleManager.h"
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static TAutoConsoleVariable<int32> CVarAimAtGazeEnabled(TEXT("tobii.interaction.AimAtGazeEnabled"), 1, TEXT("Aim@gaze will rotate the view to align with the gaze point when the user triggers it, usually by entering ADS (Aim Down Sights). 0 - Aim@gaze is off. 1 - Aim@gaze is on."));
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static TAutoConsoleVariable<float> CVarAimAtGazeDoneThreshold(TEXT("tobii.interaction.AimAtGazeDoneThreshold"), 0.0001, TEXT("If the dot product between the current and target direction quats is smaller than this, we are done rotating."));
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static TAutoConsoleVariable<int32> CVarAimAtGazeDebug(TEXT("tobii.debug.AimAtGaze"), 1, TEXT("0 - Will not visualize aim@gaze debug data. 1 - Will visualize aim@gaze debug data."));
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UTobiiAimAtGazeComponent::UTobiiAimAtGazeComponent()
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: bAllowRetarget(false)
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, AimSpeed(0.2f)
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, CurrentFocusComponent(nullptr)
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, CurrentAimTarget(0.0f, 0.0f, 0.0f)
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, bIsGazeAiming(false)
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{
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PrimaryComponentTick.bCanEverTick = true;
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}
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bool UTobiiAimAtGazeComponent::AimAtGazeAvailable()
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{
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return UTobiiInteractionsBlueprintLibrary::IsAimAtGazeEnabled();
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}
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void UTobiiAimAtGazeComponent::AimAtGaze()
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{
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if (!AimAtGazeAvailable())
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{
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return;
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}
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CurrentFocusComponent.Reset();
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FTobiiGazeFocusData FocusData;
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UTobiiGTOMBlueprintLibrary::GetFilteredGazeFocusData(FocusLayerFilters, bIsWhiteList, true, false, FocusData);
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if (FocusData.FocusedActor.IsValid())
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{
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CurrentFocusComponent = FocusData.FocusedPrimitiveComponent;
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CurrentAimTarget = FocusData.LastVisibleWorldLocation;
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bIsGazeAiming = true;
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}
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else
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{
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const FHitResult& GazeHitData = UTobiiGTOMBlueprintLibrary::GetNaiveGazeHit();
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CurrentAimTarget = GazeHitData.Location;
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bIsGazeAiming = true;
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}
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}
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void UTobiiAimAtGazeComponent::ContinuousAimAtGaze()
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{
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if (!AimAtGazeAvailable())
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{
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CurrentFocusComponent = nullptr;
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return;
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}
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if (bAllowRetarget)
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{
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FTobiiGazeFocusData FocusData;
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UTobiiGTOMBlueprintLibrary::GetFilteredGazeFocusData(FocusLayerFilters, bIsWhiteList, true, false, FocusData);
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if (FocusData.FocusedPrimitiveComponent.IsValid())
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{
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CurrentFocusComponent = FocusData.FocusedPrimitiveComponent;
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}
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}
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if (CurrentFocusComponent.IsValid())
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{
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FVector TargetFocusPosition;
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UTobiiGTOMBlueprintLibrary::GetPrimitiveComponentFocusLocation(CurrentFocusComponent.Get(), TargetFocusPosition);
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CurrentAimTarget = TargetFocusPosition;
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bIsGazeAiming = true;
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}
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else
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{
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CurrentFocusComponent.Reset();
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}
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}
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void UTobiiAimAtGazeComponent::TickComponent(float DeltaTime, enum ELevelTick TickType, FActorComponentTickFunction *ThisTickFunction)
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{
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Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
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static const auto DrawDebugCVar = IConsoleManager::Get().FindConsoleVariable(TEXT("tobii.debug"));
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if (CurrentFocusComponent != nullptr && DrawDebugCVar->GetInt() && CVarAimAtGazeDebug.GetValueOnGameThread())
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{
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DrawDebugBox(GetWorld(), CurrentAimTarget, FVector(50.0f), FColor::Cyan, false, 0.0f);
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}
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APlayerController* PlayerController = nullptr;
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APawn* OwnerPawn = Cast<APawn>(GetOwner());
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// We make it possible to attach AimAtGaze component to either Pawn or PlayerController
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if (OwnerPawn != nullptr)
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{
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PlayerController = Cast<APlayerController>(OwnerPawn->GetController());
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}
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else
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{
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PlayerController = Cast<APlayerController>(GetOwner());
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}
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if (PlayerController != nullptr)
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{
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if (AimAtGazeAvailable() && bIsGazeAiming && PlayerController->PlayerCameraManager != nullptr)
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{
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FVector CameraLocation = PlayerController->PlayerCameraManager->GetCameraLocation();
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FVector AimTargetDirection = CurrentAimTarget - CameraLocation;
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FQuat TargetQuat = AimTargetDirection.ToOrientationQuat();
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FQuat CurrentControlQuat = FQuat(PlayerController->GetControlRotation());
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CurrentControlQuat = FQuat::Slerp(CurrentControlQuat, TargetQuat, AimSpeed);
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float DotDistance = (CurrentControlQuat | TargetQuat);
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if ((1.0f - DotDistance) < CVarAimAtGazeDoneThreshold.GetValueOnGameThread())
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{
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bIsGazeAiming = false;
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CurrentControlQuat = TargetQuat;
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}
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PlayerController->SetControlRotation(CurrentControlQuat.Rotator());
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}
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}
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}
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