STT_SetIsPlayerInSight.cpp

#include "STT_SetIsPlayerInSight.h"

EStateTreeRunStatus FSTT_SetIsPlayerInSight::Tick(FStateTreeExecutionContext& Context, const float DeltaTime) const
{
	FInstanceDataType& InstanceData = Context.GetInstanceData(*this);
	if (!IsValid(InstanceData.AIController))
	{
		return EStateTreeRunStatus::Failed;
	}

	InstanceData.bIsPlayerInSight = false;

	const UAIPerceptionComponent* PerceptionComponent = InstanceData.AIController->GetAIPerceptionComponent();
	if (!IsValid(PerceptionComponent) || !IsValid(InstanceData.PlayerActor))
	{
		return EStateTreeRunStatus::Failed;
	}

	TArray<AActor*> CurrentlyPerceivedActors;
	PerceptionComponent->GetCurrentlyPerceivedActors(UAISense_Sight::StaticClass(), CurrentlyPerceivedActors);
	if (CurrentlyPerceivedActors.Contains(InstanceData.PlayerActor))
	{
		InstanceData.bIsPlayerInSight = true;
	}

	float LastStimulusAge = PerceptionComponent->GetYoungestStimulusAge(*InstanceData.PlayerActor);
	if (LastStimulusAge >= 0.f && LastStimulusAge < 0.05f)
	{
		InstanceData.bIsPlayerInSight = true;
	}

	return EStateTreeRunStatus::Running;
}

STT_SetIsPlayerInSight.h

// STT_CheckPlayerSightTask.h

#pragma once
#include "CoreMinimal.h"
#include "StealthAI.h"
#include "StateTreeExecutionContext.h"
#include "Tasks/StateTreeAITask.h"
#include "AIController.h"
#include "Perception/AIPerceptionComponent.h"
#include "Perception/AISense_Sight.h"
#include "STT_SetIsPlayerInSight.generated.h"

USTRUCT()
struct FSTT_SetIsPlayerInSightInstanceData
{
	GENERATED_BODY()

	// Input: AI Controller of the pawn
	UPROPERTY(EditAnywhere, Category = "Context")
	TObjectPtr<AAIController> AIController = nullptr;

	// Input: The player actor to check sight of
	UPROPERTY(EditAnywhere, Category = "Input")
	TObjectPtr<AActor> PlayerActor = nullptr;

	// Output: Whether the player is currently or recently in sight
	UPROPERTY(EditAnywhere, Category = "Output")
	bool bIsPlayerInSight = false;
};

USTRUCT(meta = (DisplayName = "STTask Set Is Player In Sight"))
struct FSTT_SetIsPlayerInSight : public FStateTreeAITaskBase
{
	GENERATED_BODY()

	using FInstanceDataType = FSTT_SetIsPlayerInSightInstanceData;
	virtual const UStruct* GetInstanceDataType() const override { return FInstanceDataType::StaticStruct(); }

	STEALTHAI_API virtual EStateTreeRunStatus Tick(FStateTreeExecutionContext& Context, const float DeltaTime) const override;
};