Unreal Engine 멀티플레이어 게임 개발 3-2

3-2. 판정 로직

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세 자리 난수 생성 로직과 판정 로직 작성

// CXGameModeBase.h

...
class CHATX_API ACXGameModeBase : public AGameModeBase
{
	...

public:
	...

	FString GenerateSecretNumber();

	bool IsGuessNumberString(const FString& InNumberString);

	FString JudgeResult(const FString& InSecretNumberString, const FString& InGuessNumberString);
	
};

// CXGameModeBase.cpp


...

FString ACXGameModeBase::GenerateSecretNumber()
{
	TArray<int32> Numbers;
	for (int32 i = 1; i <= 9; ++i)
	{
		Numbers.Add(i);
	}

	FMath::RandInit(FDateTime::Now().GetTicks());
	Numbers = Numbers.FilterByPredicate([](int32 Num) { return Num > 0; });
	
	FString Result;
	for (int32 i = 0; i < 3; ++i)
	{
		int32 Index = FMath::RandRange(0, Numbers.Num() - 1);
		Result.Append(FString::FromInt(Numbers[Index]));
		Numbers.RemoveAt(Index);
	}

	return Result;
}

bool ACXGameModeBase::IsGuessNumberString(const FString& InNumberString)
{
	bool bCanPlay = false;

	do {

		if (InNumberString.Len() != 3)
		{
			break;
		}

		bool bIsUnique = true;
		TSet<TCHAR> UniqueDigits;
		for (TCHAR C : InNumberString)
		{
			if (FChar::IsDigit(C) == false || C == '0')
			{
				bIsUnique = false;
				break;
			}
			
			UniqueDigits.Add(C);
		}

		if (bIsUnique == false)
		{
			break;
		}

		bCanPlay = true;
		
	} while (false);	

	return bCanPlay;
}

FString ACXGameModeBase::JudgeResult(const FString& InSecretNumberString, const FString& InGuessNumberString)
{
	int32 StrikeCount = 0, BallCount = 0;

	for (int32 i = 0; i < 3; ++i)
	{
		if (InSecretNumberString[i] == InGuessNumberString[i])
		{
			StrikeCount++;
		}
		else 
		{
			FString PlayerGuessChar = FString::Printf(TEXT("%c"), InGuessNumberString[i]);
			if (InSecretNumberString.Contains(PlayerGuessChar))
			{
				BallCount++;				
			}
		}
	}

	if (StrikeCount == 0 && BallCount == 0)
	{
		return TEXT("OUT");
	}

	return FString::Printf(TEXT("%dS%dB"), StrikeCount, BallCount);
}

---

GameMode에 로직 적용

// CXGameModeBase.h

...

class ACXPlayerController;

UCLASS()
class CHATX_API ACXGameModeBase : public AGameModeBase
{
	GENERATED_BODY()

public:
	...
	
	virtual void BeginPlay() override;
	
	void PrintChatMessageString(ACXPlayerController* InChattingPlayerController, const FString& InChatMessageString);

protected:
	FString SecretNumberString;

	TArray<TObjectPtr<ACXPlayerController>> AllPlayerControllers;
	
};

// CXGameModeBase.cpp


...
#include "Player/CXPlayerController.h"
#include "EngineUtils.h"

void ACXGameModeBase::OnPostLogin(AController* NewPlayer)
{
	...

	ACXPlayerController* CXPlayerController = Cast<ACXPlayerController>(NewPlayer);
	if (IsValid(CXPlayerController) == true)
	{
		AllPlayerControllers.Add(CXPlayerController);
	}
}

...

void ACXGameModeBase::BeginPlay()
{
	Super::BeginPlay();

	SecretNumberString = GenerateSecretNumber();
}

void ACXGameModeBase::PrintChatMessageString(ACXPlayerController* InChattingPlayerController, const FString& InChatMessageString)
{
	int Index = InChatMessageString.Len() - 3;
	FString GuessNumberString = InChatMessageString.RightChop(Index);
	if (IsGuessNumberString(GuessNumberString) == true)
	{
		FString JudgeResultString = JudgeResult(SecretNumberString, GuessNumberString);
		for (TActorIterator<ACXPlayerController> It(GetWorld()); It; ++It)
		{
			ACXPlayerController* CXPlayerController = *It;
			if (IsValid(CXPlayerController) == true)
			{
				FString CombinedMessageString = InChatMessageString + TEXT(" -> ") + JudgeResultString;
				CXPlayerController->ClientRPCPrintChatMessageString(CombinedMessageString);
			}
		}
	}
	else
	{
		for (TActorIterator<ACXPlayerController> It(GetWorld()); It; ++It)
		{
			ACXPlayerController* CXPlayerController = *It;
			if (IsValid(CXPlayerController) == true)
			{
				CXPlayerController->ClientRPCPrintChatMessageString(InChatMessageString);
			}
		}
	}
}

// CXPlayerController.cpp


...
#include "Kismet/GameplayStatics.h"
#include "Game/CXGameModeBase.h"

...

void ACXPlayerController::ServerRPCPrintChatMessageString_Implementation(const FString& InChatMessageString)
{
	// for (TActorIterator<ACXPlayerController> It(GetWorld()); It; ++It)
	// {
	// 	ACXPlayerController* CXPlayerController = *It;
	// 	if (IsValid(CXPlayerController) == true)
	// 	{
	// 		CXPlayerController->ClientRPCPrintChatMessageString(InChatMessageString);
	// 	}
	// }

	AGameModeBase* GM = UGameplayStatics::GetGameMode(this);
	if (IsValid(GM) == true)
	{
		ACXGameModeBase* CXGM = Cast<ACXGameModeBase>(GM);
		if (IsValid(CXGM) == true)
		{
			CXGM->PrintChatMessageString(this, InChatMessageString);
		}
	}
}