【UE5】第三回 ミニゲーム制作で学ぶUnrealC++ 〜UI・仕上げ実装 編〜

/**
 * RunGameWidget: リザルトUI
 */
UCLASS()
class URunGameResultWidget : public UUserWidget
{
	GENERATED_BODY()

protected:
	virtual void NativeConstruct() override;
	virtual void NativeOnInitialized() override;

・・・

protected:
	/** リザルトスコアテキスト */
	UPROPERTY(meta = (BindWidget))
	TObjectPtr<UTextBlock> ResultScoreText;

	/** リザルト 出現アニメーション */
	UPROPERTY(Transient, meta = (BindWidgetAnim))
	TObjectPtr<UWidgetAnimation> ResultAppearAnimation;

	TitleLevelUiData->SetOnPushStartButtonEvent([this]()
	{
		// RunGameレベルへ遷移する
		UGameplayStatics::OpenLevel(GetWorld(), "RunGame");;
	});

// Copyright (c) 2024, CatRunner All Rights Reserved.

#pragma once

#include "CoreMinimal.h"
#include "Audio/AudioService.h"
#include "Engine/GameInstance.h"
#include "CatRunnerGameInstance.generated.h"

/**
 * CatRunnerGameInstance
 * シーンをまたいで永続的に扱うオブジェクトを定義する
 */
UCLASS()
class CATRUNNER_API UCatRunnerGameInstance : public UGameInstance
{
	GENERATED_BODY()

	UCatRunnerGameInstance(const FObjectInitializer& ObjectInitializer);

public:
	static UCatRunnerGameInstance* GetInstance();
	static TObjectPtr<UAudioService> GetAudioService() { return GetInstance()->AudioService; }

private:
	UPROPERTY()
	TObjectPtr<UAudioService> AudioService;

};

// Copyright (c) 2024, CatRunner All Rights Reserved.


#include "GameInstance/CatRunnerGameInstance.h"

#include "Audio/AudioService.h"

UCatRunnerGameInstance::UCatRunnerGameInstance(const FObjectInitializer& ObjectInitializer)
	:AudioService(nullptr)
{
	AudioService = NewObject<UAudioService>();
}

UCatRunnerGameInstance* UCatRunnerGameInstance::GetInstance()
{
	UCatRunnerGameInstance* Instance = nullptr;

	if (GEngine != nullptr)
	{
		const FWorldContext* CurrentWorldContext = GEngine->GetWorldContextFromGameViewport(GEngine->GameViewport);
		Instance = Cast<UCatRunnerGameInstance>(CurrentWorldContext->World()->GetGameInstance());
	}
	return Instance;
}

void UAudioService::PlaySe2d(USoundBase* PlaySe)
{
	if (PlaySe == nullptr)
	{
		return;
	}
	const UWorld* CurrentWorld = GEngine->GetWorldContextFromGameViewport(GEngine->GameViewport)->World();
	UGameplayStatics::PlaySound2D(CurrentWorld, PlaySe);
}

void UAudioService::PlaySe3d(USoundBase* PlaySe, const FVector& PlayLocation)
{
	if (PlaySe == nullptr)
	{
		return;
	}
	const UWorld* CurrentWorld = GEngine->GetWorldContextFromGameViewport(GEngine->GameViewport)->World();
	UGameplayStatics::PlaySoundAtLocation(CurrentWorld, PlaySe, PlayLocation);
}

	/** BGM再生用AudioComponent */
	UPROPERTY()
	TObjectPtr<UAudioComponent> BgmAudioComponent;

void UAudioService::PlayBgm(USoundBase* PlayBgm)
{
	if (PlayBgm == nullptr)
	{
		return;
	}

	// 初回orシーン遷移後はAudioComponentを生成する
	if (BgmAudioComponent == nullptr || !IsValid(BgmAudioComponent))
	{
		const UWorld* CurrentWorld = GEngine->GetWorldContextFromGameViewport(GEngine->GameViewport)->World();
		BgmAudioComponent = UGameplayStatics::SpawnSound2D(CurrentWorld, PlayBgm);
		return;
	}

	// 再生する音源を差し替える
	BgmAudioComponent->Stop();
	BgmAudioComponent->SetSound(PlayBgm);
	BgmAudioComponent->Play();
}

void UAudioService::StopBgm() const
{
	if (BgmAudioComponent == nullptr)
	{
		return;
	}
	BgmAudioComponent->Stop();
}