Error C2664 Cannot Convert argumetn 1 from 'UBlackboardData &'

Development Programming & Scripting AI
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1

I am trying to make an AI that follows the player around the map using C++ and now im running into this error C2664
here is all my code and the output box

--------------------------------------------------------.cpp file----------------------------------------------------------------------------------------------------

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

#include “Orcon_Trail_V04.h”
#include “Controller_Bot.h”
#include “BehaviorTree/BehaviorTree.h”

AController_Bot::AController_Bot()
{
BlackboardComp = CreateDefaultSubobject(TEXT(“BlackBoardComp”));

BehaviorComp = CreateDefaultSubobject<UBehaviorTreeComponent>(TEXT("BehaviorComp"));

}

void AController_Bot::Possess(class APawn InPawn)
{
Super::Possess(InPawn);
ABot Bot = Cast(InPawn);

if (Bot && Bot->BotBehavior)
{
	UBehaviorTree* Behavior = Bot->BotBehavior;

	BlackboardComp->InitializeBlackboard(Behavior->BlackboardAsset);

	EnemyKeyID = BlackboardComp->GetKeyID("Enemy");
	EnemyLocationID = BlackboardComp->GetKeyID("Destination");

	BehaviorComp->StartTree(Behavior);
}

}

void AController_Bot::SearchForEnemy()
{

APawn* MyBot = GetPawn();
if (MyBot == NULL)
{
	return;
}

const FVector MyLoc = MyBot->GetActorLocation();
float BestDistSq = MAX_FLT;
ABot* BestPawn = NULL;

for (FConstPawnIterator It = GetWorld()->GetPawnIterator(); It; ++It)
{
	ABot* TestPawn = Cast<ABot>(*It);
	if (TestPawn)
	{
		const float DistSq = FVector::Dist(TestPawn->GetActorLocation(), MyLoc);
		if (DistSq < BestDistSq)
		{
			BestDistSq = DistSq;
			BestPawn = TestPawn;
		}
	
	}
}
if (BestPawn)
{
	SetEnemy(BestPawn);
}

}

void AController_Bot::SetEnemy(class APawn *InPawn)
{
BlackboardComp->SetValueAsObject(EnemyKeyID, InPawn);
BlackboardComp->SetValueAsVector(EnemyLocationID, InPawn->GetActorLocation());
}

--------------------------------------------------------------------------.h------------------------------------------------------------------------------------------

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

#pragma once

#include “AIController.h”
#include “BehaviorTree/BehaviorTreeComponent.h”
#include “BehaviorTree/BlackboardComponent.h”
#include “Bot.h”
#include “Controller_Bot.generated.h”

/**
*
*/
UCLASS()
class ORCON_TRAIL_V04_API AController_Bot : public AAIController
{
GENERATED_BODY()

AController_Bot();

UPROPERTY(transient)
class UBlackboardComponent* BlackboardComp;

UPROPERTY(transient)
class UBehaviorTreeComponent* BehaviorComp;

virtual void Possess(class APawn *InPawn);

void SetEnemy(class APawn *InPawn);

UFUNCTION(BlueprintCallable, Category = Behavior)
	void SearchForEnemy();

protected:
uint8 EnemyKeyID;
uint8 EnemyLocationID;

};

-----------------------------------------------------------------------output box:---------------------------------------------------------------------------------
1>------ Build started: Project: Orcon_Trail_V04, Configuration: Development_Editor x64 ------
1> Performing 2 actions (4 in parallel)
1> Controller_Bot.cpp
1>C:\Users\VGDAdmin\Desktop\Orcon_Trail_V04\Source\Orcon_Trail_V04\Controller_Bot.cpp(24): error C2664: ‘bool UBlackboardComponent::InitializeBlackboard(UBlackboardData &)’ : cannot convert argument 1 from ‘UBlackboardData *’ to ‘UBlackboardData &’
1>C:\Users\VGDAdmin\Desktop\Orcon_Trail_V04\Source\Orcon_Trail_V04\Controller_Bot.cpp(29): error C2664: ‘void UBehaviorTreeComponent::StartTree(UBehaviorTree &,EBTExecutionMode::Type)’ : cannot convert argument 1 from ‘UBehaviorTree *’ to ‘UBehaviorTree &’
1> -------- End Detailed Actions Stats -----------------------------------------------------------
1>ERROR : UBT error : Failed to produce item: C:\Users\VGDAdmin\Desktop\Orcon_Trail_V04\Binaries\Win64\UE4Editor-Orcon_Trail_V04.pdb

if anyone has any ideas or suggestions please help

2

It’s a little hard to read the above, but the clue is in this line:

C:\Users\VGDAdmin\Desktop\Orcon_Trail_V04\Source\Orcon_Trail_V04\Controller_Bot.cpp(29): error C2664: ‘void UBehaviorTreeComponent::StartTree(UBehaviorTree &,EBTExecutionMode::Type)’ : cannot convert argument 1 from 'UBehaviorTree ’ to ‘UBehaviorTree &’

Try replacing

BehaviorComp->StartTree(Behavior);

with

BehaviorComp->StartTree(*Bot->BotBehavior);
3

I replaced that line and im still getting errors. here they are…
1>------ Build started: Project: Orcon_Trail_V04, Configuration: Development_Editor x64 ------
1> Performing 2 actions (4 in parallel)
1> Controller_Bot.cpp
1>C:\Users\VGDAdmin\Desktop\Orcon_Trail_V04\Source\Orcon_Trail_V04\Controller_Bot.cpp(24): error C2664: ‘bool UBlackboardComponent::InitializeBlackboard(UBlackboardData &)’ : cannot convert argument 1 from ‘UBlackboardData *’ to ‘UBlackboardData &’
1> -------- End Detailed Actions Stats -----------------------------------------------------------
1>ERROR : UBT error : Failed to produce item: C:\Users\VGDAdmin\Desktop\Orcon_Trail_V04\Binaries\Win64\UE4Editor-Orcon_Trail_V04.pdb
1> Total build time: 4.02 seconds

4

*error C2664: ‘bool UBlackboardComponent::InitializeBlackboard(UBlackboardData &)’ : cannot convert argument 1 from 'UBlackboardData ’ to ‘UBlackboardData &’ 1

this seems to be the main thing that is causing the problems.

5

you sir have just done in just a few min. what 4 people couldn’t do in 3 hours thank you so much you have my everlasting gratitude

6

You want to do the same thing for the blackboard data, so:

BlackboardComp->InitializeBlackboard(Behavior->BlackboardAsset);

becomes

BlackboardComp->InitializeBlackboard(*Bot->BotBehavior->BlackboardAsset);

You may want to have a read around pointers in c++ so you can understand why you’re getting these errors.