Create TaskIsWithinRange

Source/Nakatomi/TaskIsWithinRange.cpp

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+// Fill out your copyright notice in the Description page of Project Settings.
+
+
+#include "TaskIsWithinRange.h"
+#include "EnemyAIController.h"
+#include <NavigationSystem.h>
+#include <BehaviorTree/BlackboardComponent.h>
+
+EBTNodeResult::Type UTaskIsWithinRange::ExecuteTask(UBehaviorTreeComponent& owner, uint8* memory)
+{
+	auto BlackboardComponent = owner.GetBlackboardComponent();
+
+	if (!BlackboardComponent)
+	{
+		return EBTNodeResult::Failed;
+	}
+
+	auto NavigationSystem = FNavigationSystem::GetCurrent<UNavigationSystemV1>(GetWorld());
+	FVector SourceLocation = BlackboardComponent->GetValueAsVector(SourceLocationKey.SelectedKeyName);
+	ANakatomiCharacter* selfActor = Cast<ANakatomiCharacter>(
+		BlackboardComponent->GetValueAsObject(SelfActorKey.SelectedKeyName));
+
+	if (NavigationSystem && SourceLocation != FVector::ZeroVector)
+	{
+		double Distance = -1.0;
+		FNavLocation NavLocation;
+
+		NavigationSystem->GetPathLength(SourceLocation, selfActor->GetTransform().GetLocation(), Distance);
+
+		return Distance <= MaximumDistance ? EBTNodeResult::Succeeded : EBTNodeResult::Failed;
+	}
+
+	return EBTNodeResult::Failed;
+}

Source/Nakatomi/TaskIsWithinRange.h

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+// Fill out your copyright notice in the Description page of Project Settings.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "BehaviorTree/BTTaskNode.h"
+#include "TaskIsWithinRange.generated.h"
+
+/**
+ * 
+ */
+UCLASS()
+class NAKATOMI_API UTaskIsWithinRange : public UBTTaskNode
+{
+	GENERATED_BODY()
+
+public:
+
+	UPROPERTY(EditAnywhere, Category = "Options",
+		Meta = (AllowPrivateAccess = "true", DisplayName = "Source Location Key"))
+	FBlackboardKeySelector SourceLocationKey;
+
+	UPROPERTY(EditAnywhere, Category = "Options",
+		Meta = (AllowPrivateAccess = "true", DisplayName = "Self Actor Key"))
+	FBlackboardKeySelector SelfActorKey;
+	
+	UPROPERTY(EditAnywhere, Category = "Options",
+	Meta = (AllowPrivateAccess = "true", DisplayName = "Maximum Distance"))
+	float MaximumDistance = 500.0f;
+
+public:
+	virtual EBTNodeResult::Type ExecuteTask(UBehaviorTreeComponent& owner, uint8* memory) override;
+
+	
+};