The Tasks I have written in C++ doesn't show up in Behavior Tree

[M.Abdullah_Sultan]

Hello everyone:
I am using UE4.26.2
I am working on Simple Shooter (from UE4 C++ course), the tasks I wrote in C++, I can’t find them in Behavior Tree. Only tasks that are written in Blueprints show up in Behavior Tree.

Kindly help me out,
#unreal #simple-shooter

[DanM]

1. Could you show your code?
2. Did it compile successfully?

[M.Abdullah_Sultan]

The .h file

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

#pragma once

#include "CoreMinimal.h"
#include "BehaviorTree/Tasks/BTTask_BlackboardBase.h"
#include "ChasePlayer_Task.generated.h"

/**
 *
 */
UCLASS()
class ZOMBIEAPOCALYPSE_API UChasePlayer_Task : public UBTTask_BlackboardBase
{
	GENERATED_BODY()

public:
		UChasePlayer_Task();

	virtual EBTNodeResult::Type ExecuteTask(UBehaviorTreeComponent& OwnerComp, uint8* NodeMemory) override;

};

The .cpp file

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


#include "Tasks/ChasePlayer_Task.h"
#include "AIController.h"
#include "BehaviorTree/BlackboardComponent.h"
#include "AITypes.h"

UChasePlayer_Task::UChasePlayer_Task()
{
	NodeName = "ChasePlayerTask";
}

EBTNodeResult::Type UChasePlayer_Task::ExecuteTask(UBehaviorTreeComponent& OwnerComp, uint8* NodeMemory)
{
	Super::ExecuteTask(OwnerComp, NodeMemory);
	FVector GoalLocation = OwnerComp.GetBlackboardComponent()->GetValueAsVector(GetSelectedBlackboardKey());

	FAIMoveRequest FAIMoveReq;
	FAIMoveReq.SetGoalLocation(GoalLocation);
	OwnerComp.GetAIOwner()->MoveToLocation(GoalLocation, 1.0f, true, true, true, true, NULL, true);

	return EBTNodeResult::Succeeded;
}

Code did compile successfully.

[DanM]

Could you try a rebuild?
From VS Code with Unreal closed do the following

Ctrl + Shift + B > ProjectNameEditor Platform Development Rebuild

Where ProjectName is the name of your project and Platform is the platform you’re targeting e.g. Win64

[M.Abdullah_Sultan]

Sir I am using VS 2019. I did right click on project name and rebuild it (also tried to rebuild after clean) but still same problem. Engine version 4.26.2.

[DanM]

Oh right that’s because of what you’re search for. The class is called “UChasePlayer_Task” so the task should show up if you search “Chase”

[Mattias]

The reason it doesn’t show up in the Behavior Tree is because Unreal Engine requires “BTTask_” in the class name.

Your task is named “ChasePlayer_Task”. If you rename/recreate it to something like “BTTask_ChasePlayer”, keeping “BTTask_” in there, it should show up.