From 44bf11634041221888a56d46ecb45bd717326b79 Mon Sep 17 00:00:00 2001
From: PHILIP WHITE <PW259246@falmouth.ac.uk>
Date: Thu, 28 Sep 2023 21:26:45 +0100
Subject: [PATCH] Add AI Task for Random Patrolling of a Set Area

---
 .../AI/BTTask_FindRandomLocation.cpp          | 32 +++++++++++++++++++
 .../AI/BTTask_FindRandomLocation.h            | 24 ++++++++++++++
 2 files changed, 56 insertions(+)
 create mode 100644 EndlessVendetta/Source/EndlessVendetta/AI/BTTask_FindRandomLocation.cpp
 create mode 100644 EndlessVendetta/Source/EndlessVendetta/AI/BTTask_FindRandomLocation.h

diff --git a/EndlessVendetta/Source/EndlessVendetta/AI/BTTask_FindRandomLocation.cpp b/EndlessVendetta/Source/EndlessVendetta/AI/BTTask_FindRandomLocation.cpp
new file mode 100644
index 00000000..62a3d9b8
--- /dev/null
+++ b/EndlessVendetta/Source/EndlessVendetta/AI/BTTask_FindRandomLocation.cpp
@@ -0,0 +1,32 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+
+#include "BTTask_FindRandomLocation.h"
+
+#include "AI_EnemyController.h"
+#include "NavigationSystem.h"
+#include "BehaviorTree/BlackboardComponent.h"
+
+UBTTask_FindRandomLocation::UBTTask_FindRandomLocation(FObjectInitializer const& ObjectInitializer)
+{
+	NodeName = TEXT("Find Random Location");
+}
+
+EBTNodeResult::Type UBTTask_FindRandomLocation::ExecuteTask(UBehaviorTreeComponent& OwnerComp, uint8* NodeMemory)
+{
+	if (const AAI_EnemyController* const AIController = Cast<AAI_EnemyController>(OwnerComp.GetAIOwner()))
+	{
+		if (UBlackboardComponent* const Blackboard = OwnerComp.GetBlackboardComponent())
+		{
+			FVector const Origin = AIController->GetPawn()->GetActorLocation();
+			const UNavigationSystemV1* const NavSystem = UNavigationSystemV1::GetCurrent(GetWorld());
+			if (FNavLocation RandomLocation; NavSystem->GetRandomPointInNavigableRadius(Origin, SearchRadius, RandomLocation))
+			{
+				Blackboard->SetValueAsVector(GetSelectedBlackboardKey(), RandomLocation.Location);
+				FinishLatentTask(OwnerComp, EBTNodeResult::Succeeded);
+				return EBTNodeResult::Succeeded;
+			}
+		}
+	}
+	return EBTNodeResult::Failed;
+}
diff --git a/EndlessVendetta/Source/EndlessVendetta/AI/BTTask_FindRandomLocation.h b/EndlessVendetta/Source/EndlessVendetta/AI/BTTask_FindRandomLocation.h
new file mode 100644
index 00000000..e3b5df85
--- /dev/null
+++ b/EndlessVendetta/Source/EndlessVendetta/AI/BTTask_FindRandomLocation.h
@@ -0,0 +1,24 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "BehaviorTree/Tasks/BTTask_BlackboardBase.h"
+#include "BTTask_FindRandomLocation.generated.h"
+
+/**
+ * 
+ */
+UCLASS()
+class ENDLESSVENDETTA_API UBTTask_FindRandomLocation : public UBTTask_BlackboardBase
+{
+	GENERATED_BODY()
+
+public:
+	explicit UBTTask_FindRandomLocation(FObjectInitializer const& ObjectInitializer);
+	virtual EBTNodeResult::Type ExecuteTask(UBehaviorTreeComponent& OwnerComp, uint8* NodeMemory) override;
+
+private:
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "AI", meta = (AllowPrivateAccess = "true"))
+	float SearchRadius = 1000.f;
+};