UE5&C++ 在 AIController中绑定行为树，和黑板初始化

注意事项

• 绑定黑板不要在构造函数中写
• 建议在OnPossess函数绑定

定义行为树

	UPROPERTY(EditAnywhere,BlueprintReadWrite, Category = "AI")
	UBehaviorTree* BehaviorTreeAsset; // 关联编辑器中的行为树资源

绑定黑板

void AMyEnemyAIControllerBase::OnPossess(APawn* InPawn)
{
	Super::OnPossess(InPawn);
	BindBlackboardValue();
	if (const auto Enemy = Cast<AMyEnemyBase>(InPawn))
	{
		Enemy->GetCharacterMovement()->bOrientRotationToMovement = true;
		SetEnemyOutlet(Enemy->TryGetOutlet());
	}
	//运行行为树
	if (BehaviorTreeAsset)
	{
		RunBehaviorTree(BehaviorTreeAsset);
	}
	
}

void AMyEnemyAIControllerBase::BindBlackboardValue()
{
	if (BehaviorTreeAsset)
	{
		UBlackboardComponent* MyBlackboard = nullptr;
		UseBlackboard(BehaviorTreeAsset->BlackboardAsset, MyBlackboard);
	}
}

void AMyEnemyAIControllerBase::SetEnemyOutlet(AMyOutletBase* OutletBase) const
{
	if (OutletBase && BehaviorTreeAsset && Blackboard)
	{
		Blackboard->SetValueAsObject(TEXT("Outlet"), OutletBase);
		UE_LOG(LogTemp, Log, TEXT("设置出怪口成功(黑板)"))
	}else
	{
		UE_LOG(LogTemp, Error, TEXT("设置出怪口失败"));
	}
}

完整的代码

AMyEnemyAIControllerBase.h

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"
#include "Actor/Outlet/MyOutletBase.h"
#include "Runtime/AIModule/Classes/AIController.h"
#include "MyEnemyAIControllerBase.generated.h"


/**
 * 怪物的AI控制器,不能直接使用
 */
UCLASS(ABstract)
class DEMO2_API AMyEnemyAIControllerBase : public AAIController
{
	GENERATED_BODY()

public:
	AMyEnemyAIControllerBase();

	/// 控制胖时调用
	virtual void OnPossess(APawn* InPawn) override;

	UPROPERTY(EditAnywhere,BlueprintReadWrite, Category = "AI")
	UBehaviorTree* BehaviorTreeAsset; // 关联编辑器中的行为树资源
	
	
protected:

	
	virtual void BeginPlay() override;

	UFUNCTION()
	void SetEnemyOutlet(AMyOutletBase* OutletBase) const;


	UFUNCTION()
	void BindBlackboardValue();
	
public:
	virtual void Tick(float DeltaTime) override;

};

AMyEnemyAIControllerBase.cpp

// Fill out your copyright notice in the Description page of Project Settings.


#include "AI/MyEnemyAIControllerBase.h"

#include "BehaviorTree/BehaviorTree.h"
#include "BehaviorTree/BlackboardComponent.h"
#include "GameFramework/CharacterMovementComponent.h"
#include "Navigation/PathFollowingComponent.h"
#include "Tool/MyCoreTool.h"
#include "Tool/MyLogTool.h"


AMyEnemyAIControllerBase::AMyEnemyAIControllerBase(): BehaviorTreeAsset(nullptr)
{
	PrimaryActorTick.bCanEverTick = false;
}


/// 控制胖时调用,可以设置初始目标和行为树 
void AMyEnemyAIControllerBase::OnPossess(APawn* InPawn)
{
	Super::OnPossess(InPawn);
	BindBlackboardValue();
	if (const auto Enemy = Cast<AMyEnemyBase>(InPawn))
	{
		Enemy->GetCharacterMovement()->bOrientRotationToMovement = true;
		SetEnemyOutlet(Enemy->TryGetOutlet());
	}
	//运行行为树
	if (BehaviorTreeAsset)
	{
		RunBehaviorTree(BehaviorTreeAsset);
	}
	
}

void AMyEnemyAIControllerBase::BeginPlay()
{
	Super::BeginPlay();
}



void AMyEnemyAIControllerBase::SetEnemyOutlet(AMyOutletBase* OutletBase) const
{
	if (OutletBase && BehaviorTreeAsset && Blackboard)
	{
		Blackboard->SetValueAsObject(TEXT("Outlet"), OutletBase);
		UE_LOG(LogTemp, Log, TEXT("设置出怪口成功(黑板)"))
	}else
	{
		UE_LOG(LogTemp, Error, TEXT("设置出怪口失败"));
	}
}


void AMyEnemyAIControllerBase::BindBlackboardValue()
{
	if (BehaviorTreeAsset)
	{
		UBlackboardComponent* MyBlackboard = nullptr;
		UseBlackboard(BehaviorTreeAsset->BlackboardAsset, MyBlackboard);
	}
}


void AMyEnemyAIControllerBase::Tick(float DeltaTime)
{
	Super::Tick(DeltaTime);
}