From 1c1c56ea46987099aa80e866905fd38e0c6fe2e6 Mon Sep 17 00:00:00 2001
From: Caleb Buhungiro <caleb.buhungiro@finology-group.com>
Date: Sun, 14 Sep 2025 19:47:24 +0800
Subject: [PATCH] Add perception component

---
 Config/DefaultEngine.ini                   |  8 +++++
 Content/AI/Minions/AIC_Minion_BP.uasset    |  4 +--
 Content/AI/Minions/Minion_BB.uasset        |  3 ++
 Content/AI/Minions/Minion_BT.uasset        |  3 ++
 Source/Crunch/Private/AI/CAIController.cpp | 41 +++++++++++++++++++++-
 Source/Crunch/Public/AI/CAIController.h    | 13 +++++++
 6 files changed, 69 insertions(+), 3 deletions(-)
 create mode 100644 Content/AI/Minions/Minion_BB.uasset
 create mode 100644 Content/AI/Minions/Minion_BT.uasset

diff --git a/Config/DefaultEngine.ini b/Config/DefaultEngine.ini
index a830ed9..2d98a8d 100644
--- a/Config/DefaultEngine.ini
+++ b/Config/DefaultEngine.ini
@@ -93,4 +93,12 @@ ManualIPAddress=
 
 [/Script/GameplayDebugger.GameplayDebuggerConfig]
 CategorySlot5=Five
+CategorySlot1=One
+CategorySlot2=Two
+CategorySlot3=Three
+CategorySlot4=Four
+CategorySlot6=Six
+CategorySlot7=Seven
+CategorySlot8=Eight
+CategorySlot9=Nine
 
diff --git a/Content/AI/Minions/AIC_Minion_BP.uasset b/Content/AI/Minions/AIC_Minion_BP.uasset
index 3ed57bd..2c24988 100644
--- a/Content/AI/Minions/AIC_Minion_BP.uasset
+++ b/Content/AI/Minions/AIC_Minion_BP.uasset
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:34bdfb6050bbcdf26195ecf4a39574e0ea3a8a9f1b2de2fa2a1d33d6cd762858
-size 20715
+oid sha256:6b50d48e024b6e6efffec66bffe3504f45cfab96c286388b23f8888bc77aa0a2
+size 21493
diff --git a/Content/AI/Minions/Minion_BB.uasset b/Content/AI/Minions/Minion_BB.uasset
new file mode 100644
index 0000000..3e385b3
--- /dev/null
+++ b/Content/AI/Minions/Minion_BB.uasset
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0cda61b43e0330017b3aecddbd59e1b231acb3c648908984724b4a8da27d0459
+size 2325
diff --git a/Content/AI/Minions/Minion_BT.uasset b/Content/AI/Minions/Minion_BT.uasset
new file mode 100644
index 0000000..ebd1668
--- /dev/null
+++ b/Content/AI/Minions/Minion_BT.uasset
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9d1723b37fb0124e2cec168ce8fe74504871fed3e54bf5c4118eff9f28404f9d
+size 3296
diff --git a/Source/Crunch/Private/AI/CAIController.cpp b/Source/Crunch/Private/AI/CAIController.cpp
index 0f72779..4f12204 100644
--- a/Source/Crunch/Private/AI/CAIController.cpp
+++ b/Source/Crunch/Private/AI/CAIController.cpp
@@ -3,6 +3,7 @@
 
 #include "AI/CAIController.h"
 
+#include "BehaviorTree/BlackboardComponent.h"
 #include "Character/CCharacter.h"
 #include "Perception/AIPerceptionComponent.h"
 #include "Perception/AISenseConfig_Sight.h"
@@ -15,7 +16,7 @@ ACAIController::ACAIController()
 	SightConfig = CreateDefaultSubobject<UAISenseConfig_Sight>("Sight config");
 
 	SightConfig->DetectionByAffiliation.bDetectEnemies = true;
-	SightConfig->DetectionByAffiliation.bDetectFriendlies = false;
+	SightConfig->DetectionByAffiliation.bDetectFriendlies = true;
 	SightConfig->DetectionByAffiliation.bDetectNeutrals = false;
 
 	SightConfig->SightRadius = 1000.f;
@@ -24,6 +25,7 @@ ACAIController::ACAIController()
 	SightConfig->PeripheralVisionAngleDegrees = 100.f;
 
 	AIPerceptionComponent->ConfigureSense(*SightConfig);
+	AIPerceptionComponent->OnTargetPerceptionUpdated.AddDynamic(this, &ThisClass::TargetPerceptionUpdated);
 }
 
 void ACAIController::OnPossess(APawn* InPawn)
@@ -40,9 +42,46 @@ void ACAIController::OnPossess(APawn* InPawn)
 void ACAIController::BeginPlay()
 {
 	Super::BeginPlay();
+	RunBehaviorTree(BehaviorTree);
 }
 
 void ACAIController::Tick(float DeltaTime)
 {
 	Super::Tick(DeltaTime);
 }
+
+void ACAIController::TargetPerceptionUpdated(AActor* TargetActor, FAIStimulus Stimulus)
+{
+	UE_LOG(LogTemp, Warning, TEXT("Saw you"))
+	// GEngine->AddOnScreenDebugMessage(
+	// 	-1, 12.f, FColor::Blue,
+	// 	FString::Printf(TEXT("saw you")));
+	
+	if (Stimulus.WasSuccessfullySensed())
+	{
+		if (!GetCurrentTarget()) SetCurrentTarget(TargetActor);
+	}
+	else
+	{
+		if (GetCurrentTarget() == TargetActor) SetCurrentTarget(nullptr);
+	}
+}
+
+const UObject* ACAIController::GetCurrentTarget() const
+{
+	if (const auto BlackboardComponent{GetBlackboardComponent()})
+	{
+		const auto Target{BlackboardComponent->GetValueAsObject(BlackboardTargetName)};
+		return Target;
+	}
+	return nullptr;
+}
+
+void ACAIController::SetCurrentTarget(AActor* NewTarget)
+{
+	const auto BlackboardComponent{GetBlackboardComponent()};
+	if (!BlackboardComponent) return;
+
+	if (NewTarget) BlackboardComponent->SetValueAsObject(BlackboardTargetName, NewTarget);
+	else BlackboardComponent->ClearValue(BlackboardTargetName);
+}
diff --git a/Source/Crunch/Public/AI/CAIController.h b/Source/Crunch/Public/AI/CAIController.h
index 199d0c0..a0d4b9b 100644
--- a/Source/Crunch/Public/AI/CAIController.h
+++ b/Source/Crunch/Public/AI/CAIController.h
@@ -4,6 +4,7 @@
 
 #include "CoreMinimal.h"
 #include "AIController.h"
+#include "Perception/AIPerceptionTypes.h"
 #include "CAIController.generated.h"
 
 UCLASS()
@@ -22,9 +23,21 @@ public:
 	virtual void Tick(float DeltaTime) override;
 
 private:
+
+	UPROPERTY(EditDefaultsOnly, Category="AI Behavior")
+	FName BlackboardTargetName {"Target"};
+	UFUNCTION()
+	void TargetPerceptionUpdated(AActor* TargetActor, FAIStimulus Stimulus);
+	
+	UPROPERTY(EditDefaultsOnly, Category="AI Behavior")
+	UBehaviorTree* BehaviorTree;
+	
 	UPROPERTY(VisibleDefaultsOnly, Category="Perception")
 	UAIPerceptionComponent* AIPerceptionComponent;
 
 	UPROPERTY(VisibleDefaultsOnly, Category="Perception")
 	class UAISenseConfig_Sight* SightConfig;
+	UFUNCTION()
+	const UObject* GetCurrentTarget() const ;
+	void SetCurrentTarget(AActor* NewTarget);
 };