[UE] 총알 연사, HUD & CrossHair

전반적으로 언리얼 엔진에서 TPS 총알 발사를 구현하려면 블루프린트, 애니메이션 및 물리 시뮬레이션의 조합이 필요하다. 올바른 설정을 통해 플레이어가 게임에 계속 몰입할 수 있는 현실적이고 매력적인 슈팅 경험을 만들 수 있다.

연사(AutoFire) 구현하기


Characters
	CAnimInstance.h .cpp CPlayer.h .cpp
Utilities
	CHelpers.h CLog.h .cpp
Weapons
	CWeapon.h .cpp CWeapon_AR4.h .cpp CWeaponComponent.h .cpp
Widget
	CUserWidget_CrossHair.h .cpp 생성 CUserWidget_HUD.h .cpp
CGameMode.h .cpp Global.h CAnimNotifyState_Equip.h .cpp

CWeapon

CWeapon.h

 #pragma once
#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "CWeapon.generated.h"
 
//직렬화 해야하는 struct는 클래스 사이에 선언해야 한다.
USTRUCT()
struct FWeaponAimData
{
	GENERATED_BODY()
 
public:
	UPROPERTY(EditAnywhere)
		float TargetArmLength;
 
	UPROPERTY(EditAnywhere)
		FVector SocketOffset;
 
	UPROPERTY(EditAnywhere)
		float FieldOfView;
 
	UPROPERTY(EditAnywhere)
		bool bEnableCameraLag;
 
public:
	void SetData(class ACharacter* InOwner);
	void SetDataByNoneCurve(class ACharacter* InOwner);
 
};
 
//abstract를 쓰면 Unreal Editor에서 추상 베이스 클래스로 취급하겠다는 의미. 추상이되면 배치시킬 수 없다.
UCLASS(abstract) 
class U2212_04_API ACWeapon : public AActor
{
	GENERATED_BODY()
 
 
protected:
	UPROPERTY(EditDefaultsOnly, Category = "Equip")
		FName HolsterSocketName;
 
	UPROPERTY(EditDefaultsOnly, Category = "Equip")
		class UAnimMontage* EquipMontage;
 
	UPROPERTY(EditDefaultsOnly, Category = "Equip")
		float EquipMontage_PlayRate;
 
	UPROPERTY(EditDefaultsOnly, Category = "Equip")
		FName RightHandSocketName;
 
	UPROPERTY(EditDefaultsOnly, Category = "Equip")
		FVector LeftHandLocation;
 
protected:
	UPROPERTY(EditDefaultsOnly, Category = "Aim")
		FWeaponAimData BaseData;
 
	UPROPERTY(EditDefaultsOnly, Category = "Aim")
		FWeaponAimData AimData;
 
	UPROPERTY(EditDefaultsOnly, Category = "Aim")
		class UCurveFloat* AimCurve;
 
	UPROPERTY(EditDefaultsOnly, Category = "Aim")
		float AimingSpeed = 200;
 
protected:
	UPROPERTY(EditDefaultsOnly, Category = "Hit")
		float HitDistance = 3000;
 
	UPROPERTY(EditDefaultsOnly, Category = "Hit")
		class UMaterialInstanceConstant* HitDecal;
 
	UPROPERTY(EditDefaultsOnly, Category = "Hit")
		class UParticleSystem* HitParticle;
 
protected:
	UPROPERTY(EditDefaultsOnly, Category = "Fire")
		class UParticleSystem* FlashParticle;
 
	UPROPERTY(EditDefaultsOnly, Category = "Fire")
		class UParticleSystem* EjectParticle;
 
	UPROPERTY(EditDefaultsOnly, Category = "Fire")
		class USoundWave* FireSound;
 
	UPROPERTY(EditDefaultsOnly, Category = "Fire")
		float RecoilAngle; //Cone의 각도
 
	UPROPERTY(EditDefaultsOnly, Category = "Fire")
		TSubclassOf<class UMatineeCameraShake> CameraShakeClass;
 
	UPROPERTY(EditDefaultsOnly, Category = "Fire")
		float AutoFireInterval; //연사 시간간격
 
	UPROPERTY(EditDefaultsOnly, Category = "Fire")
		float RecoilRate; //반동률
 
protected:
	UPROPERTY(EditDefaultsOnly, Category = "UI")
		TSubclassOf<class UCUserWidget_CrossHair> CrossHairClass; //CrossHair
 
private:
	UPROPERTY(VisibleAnywhere)
		class USceneComponent* Root;
 
protected:
	UPROPERTY(VisibleAnywhere)
		class USkeletalMeshComponent* Mesh;
 
private:
	UPROPERTY(VisibleAnywhere)
		class UTimelineComponent* Timeline;
 
public:
	FORCEINLINE bool IsInAim() { return bInAim; }
	FORCEINLINE bool IsAutoFire() { return bAutoFire; }
	FORCEINLINE FVector GetLeftHandLocation() { return LeftHandLocation; }
 
public:	
	ACWeapon();
 
protected:
	virtual void BeginPlay() override;
 
public:	
	virtual void Tick(float DeltaTime) override;
 
public:
	bool CanEquip();
	void Equip();
	void Begin_Equip();
	void End_Equip();
 
	bool CanUnequip();
	void Unequip();
 
public:
	bool CanAim();
	void Begin_Aim();
	void End_Aim();
 
private:
	UFUNCTION()
		void OnAiming(float Output); //조준
 
public:
	bool CanFire();
	void Begin_Fire();
	void End_Fire();
 
private:
	UFUNCTION()
		void OnFiring(); //연사
 
public:
	void ToggleAutoFire(); //연사 On Off 토글
 
private:
	bool bEquipping;
	bool bInAim;
	bool bFiring;
	bool bReload;
	bool bAutoFire = true;
 
private:
	class ACPlayer* Owner;
 
private:
	FTimerHandle AutoFireHandle; //타이머 핸들 추가
 
private:
	class UCUserWidget_CrossHair* CrossHair;
};

변수 생성

bool bEnableCameraLag;
float RecoilRate;
TSubclassOf<class UCUserWidget_CrossHair> CrossHairClass;
class UCUserWidget_CrossHair* CrossHair;

연사에 필요한 함수 선언.

FORCEINLINE bool IsAutoFire() { return bAutoFire; }
void ToggleAutoFire();

CWeapon.cpp

 #include "Weapons/CWeapon.h"
#include "Global.h"
#include "Character/CPlayer.h"
#include "Components/SkeletalMeshComponent.h"
#include "Components/TimelineComponent.h"
#include "Components/DecalComponent.h"
#include "GameFramework/SpringArmComponent.h"
#include "Camera/CameraComponent.h"
#include "Camera/CameraShake.h"
#include "Materials/MaterialInstanceConstant.h"
#include "Particles/ParticleSystem.h"
#include "Widgets/CUserWidget_CrossHair.h"
 
void FWeaponAimData::SetData(ACharacter* InOwner)
{
	USpringArmComponent* springArm = CHelpers::GetComponent<USpringArmComponent>(InOwner);
	springArm->TargetArmLength = TargetArmLength;
	springArm->SocketOffset = SocketOffset;
	springArm->bEnableCameraLag = bEnableCameraLag;
}
 
void FWeaponAimData::SetDataByNoneCurve(ACharacter* InOwner)
{
	USpringArmComponent* springArm = CHelpers::GetComponent<USpringArmComponent>(InOwner);
	springArm->TargetArmLength = TargetArmLength;
	springArm->SocketOffset = SocketOffset;
	springArm->bEnableCameraLag = bEnableCameraLag;
 
	UCameraComponent* camera = CHelpers::GetComponent<UCameraComponent>(InOwner);
	camera->FieldOfView = FieldOfView; //curve를 이용하여 FieldOfView를 만들어준다. 
}
 
 
 
ACWeapon::ACWeapon()
{
	PrimaryActorTick.bCanEverTick = true;
 
	CHelpers::CreateComponent<USceneComponent>(this, &Root, "Root");
	CHelpers::CreateComponent<USkeletalMeshComponent>(this, &Mesh, "Mesh", Root);
 
	CHelpers::CreateActorComponent<UTimelineComponent>(this, &Timeline, "Timeline");
	//CurveFloat 
	CHelpers::GetAsset<UCurveFloat>(&AimCurve, "CurveFloat'/Game/Character/Weapons/Curve_Aim.Curve_Aim'");
 
	CHelpers::GetAsset<UMaterialInstanceConstant>(&HitDecal, "MaterialInstanceConstant'/Game/Materials/M_Decal_Inst.M_Decal_Inst'");
	CHelpers::GetAsset<UParticleSystem>(&HitParticle, "ParticleSystem'/Game/Effects/P_Impact_Default.P_Impact_Default'");
 
	CHelpers::GetAsset<UParticleSystem>(&FlashParticle, "ParticleSystem'/Game/Effects/P_Muzzleflash.P_Muzzleflash'");
	CHelpers::GetAsset<UParticleSystem>(&EjectParticle, "ParticleSystem'/Game/Effects/P_Eject_bullet.P_Eject_bullet'");
	CHelpers::GetAsset<USoundWave>(&FireSound, "SoundWave'/Game/Sounds/S_RifleShoot.S_RifleShoot'");
 
}
 
void ACWeapon::BeginPlay()
{
	Super::BeginPlay();
 
	Owner = Cast<ACPlayer>(GetOwner());
 
	if (HolsterSocketName.IsValid())
		CHelpers::AttachTo(this, Owner->GetMesh(), HolsterSocketName);
 
	BaseData.SetDataByNoneCurve(Owner);
 
	if(!!AimCurve)
	{
		FOnTimelineFloat timeline;
		timeline.BindUFunction(this, "OnAiming");
 
		Timeline->AddInterpFloat(AimCurve, timeline); //이벤트 객체를 다룸.
		Timeline->SetLooping(false);
		Timeline->SetPlayRate(AimingSpeed);
	}
 
	if(!!CrossHairClass)
	{
		CrossHair = CreateWidget<UCUserWidget_CrossHair, APlayerController>(Owner->GetController<APlayerController>(), CrossHairClass);
		CrossHair->AddToViewport();
		CrossHair->SetVisibility(ESlateVisibility::Hidden);
	}
}
 
void ACWeapon::Tick(float DeltaTime)
{
	Super::Tick(DeltaTime);
 
}
 
bool ACWeapon::CanEquip()
{
	bool b = false;
	//3개 다 false일 때 b = false
	//3개 중 하나라도 true면 b = true
	b |= bEquipping;
	b |= bReload;
	b |= bFiring;
 
	return !b; //b = false일 때 True를 리턴
}
 
void ACWeapon::Equip()
{
	bEquipping = true;
 
	if (!!EquipMontage)
		Owner->PlayAnimMontage(EquipMontage, EquipMontage_PlayRate);
}
 
void ACWeapon::Begin_Equip()
{
	if (RightHandSocketName.IsValid())
		CHelpers::AttachTo(this, Owner->GetMesh(), RightHandSocketName);
}
 
void ACWeapon::End_Equip()
{
	bEquipping = false;
 
	if (!!CrossHair)
		CrossHair->SetVisibility(ESlateVisibility::Visible);
}
 
bool ACWeapon::CanUnequip()
{
	bool b = false;
	b |= bEquipping;
	b |= bReload;
	b |= bFiring;
 
	return !b;
}
 
void ACWeapon::Unequip()
{
	if (HolsterSocketName.IsValid())
		CHelpers::AttachTo(this, Owner->GetMesh(), HolsterSocketName);
 
	if (!!CrossHair) //무기해제 시 CrossHair가 있으면
		CrossHair->SetVisibility(ESlateVisibility::Hidden);//CrossHair 꺼줌
}
 
bool ACWeapon::CanAim()
{
	bool b = false;
	b |= bEquipping;
	b |= bReload;
	b |= bInAim;
 
	return !b;
}
 
void ACWeapon::Begin_Aim()
{
	bInAim = true;
 
	//우리는 생성자 ACWeapon()에서 AimCurve를 가져왔다.
	if (!!AimCurve) //AimCurve가 있으면 true, 없으면 nullptr이기 때문에 false
	{
		Timeline->PlayFromStart();
		AimData.SetData(Owner);
 
		return;
	}
 
	AimData.SetDataByNoneCurve(Owner);
}
 
void ACWeapon::End_Aim()
{
	CheckFalse(bInAim);
	bInAim = false;
 
	if (!!AimCurve)
	{
		Timeline->ReverseFromEnd();
		BaseData.SetData(Owner);
 
		return;
	}
 
	BaseData.SetDataByNoneCurve(Owner);
 
}
 
void ACWeapon::OnAiming(float Output)
{
	UCameraComponent* camera = CHelpers::GetComponent<UCameraComponent>(Owner);
	camera->FieldOfView = FMath::Lerp(AimData.FieldOfView, BaseData.FieldOfView, Output);
}
 
bool ACWeapon::CanFire()
{
	bool b = false;
	b |= bEquipping;
	b |= bReload;
	b |= bFiring; //발사하고 있는지
 
	return !b;
}
 
void ACWeapon::Begin_Fire()
{
	bFiring = true;
 
	if(bAutoFire)
	{
		GetWorld()->GetTimerManager().SetTimer(AutoFireHandle, this, &ACWeapon::OnFiring, AutoFireInterval, true, 0);
 
		return;
	}
 
	OnFiring();
}
 
void ACWeapon::End_Fire()
{
	CheckFalse(bFiring);
 
	if(GetWorld()->GetTimerManager().IsTimerActive(AutoFireHandle))//AutoFireHandle이 활성화 있다면
	{
		GetWorld()->GetTimerManager().ClearTimer(AutoFireHandle);//AutoFireHandle 해제
	}
 
	bFiring = false;
}
 
void ACWeapon::OnFiring()
{
	UCameraComponent* camera = CHelpers::GetComponent<UCameraComponent>(Owner);
	FVector direction = camera->GetForwardVector();
	FTransform transform = camera->GetComponentToWorld();
 
	FVector start = transform.GetLocation() + direction; //눈알 안보다 앞쪽으로 설정하기 때문에 쏘는 방향쪽으로 조금 더해준다.
 
	// Cone 모양의 탄착군 형성. 나갈방향(direction). 몇 도로 만들것인가(RecoilAngle). CWeapon_AR4에서 RecoilAngle의 Default값을 설정하였다.
	direction = UKismetMathLibrary::RandomUnitVectorInConeInDegrees(direction, RecoilAngle);
	FVector end = transform.GetLocation() + direction * HitDistance;
 
	//DrawDebugLine(GetWorld(), start, end, FColor::Red, true, 5);
 
	TArray<AActor*> ignores;
 
	FHitResult hitResult;
	UKismetSystemLibrary::LineTraceSingle(GetWorld(), start, end, ETraceTypeQuery::TraceTypeQuery1, false, ignores, EDrawDebugTrace::None, hitResult,true);
 
	if(hitResult.bBlockingHit) //발사한 LineTrace가 Object에 맞아 Block 충돌이 되었다면
	{
		if (!!HitDecal)
		{
			FRotator rotator = hitResult.ImpactNormal.Rotation(); //HitDecal이 붙을 방향(rotator) = 충돌된 곳의 Normal 방향
 
			UDecalComponent* decal = UGameplayStatics::SpawnDecalAtLocation(GetWorld(), HitDecal, FVector(5), hitResult.Location, rotator, 10);
			decal->SetFadeScreenSize(0);
		}
 
		if(!!HitParticle)
		{
			//hit된 지점으로부터 최초로 쏜 지점(=나)을 향하도록 설정.
			FRotator rotator = UKismetMathLibrary::FindLookAtRotation(hitResult.Location, hitResult.TraceStart);
 
			//Particle이 충돌위치에서 쏜 위치를 향햐도록 나옴.
			UGameplayStatics::SpawnEmitterAtLocation(GetWorld(), HitParticle, hitResult.Location, rotator);
		}
	}
 
	if (!!FlashParticle) //Muzzle에서 나오는 FlashParticle
		UGameplayStatics::SpawnEmitterAttached(FlashParticle, Mesh, "Muzzle", FVector::ZeroVector, FRotator::ZeroRotator, EAttachLocation::KeepRelativeOffset);
 
 
	if (!!EjectParticle) //Eject에서 나오는 EjectParticle. 탄피.
		UGameplayStatics::SpawnEmitterAttached(EjectParticle, Mesh, "Eject", FVector::ZeroVector, FRotator::ZeroRotator, EAttachLocation::KeepRelativeOffset);
 
	//muzzleLocation 변수를 소켓으로 만든 muzzle 위치로 잡아준다.
	FVector muzzleLocation = Mesh->GetSocketLocation("Muzzle");
 
	if (!!FireSound)
		UGameplayStatics::SpawnSoundAtLocation(GetWorld(), FireSound, muzzleLocation);
 
	if(!!CameraShakeClass)
	{
		//PlayerCameraManager는 PlayerController에 있으므로 PlayerController를 가져온다.
		APlayerController* controller = Owner->GetController<APlayerController>();
 
		if (!!controller)
			controller->PlayerCameraManager->StartCameraShake(CameraShakeClass);
	}
 
	Owner->AddControllerPitchInput(-RecoilRate * UKismetMathLibrary::RandomFloatInRange(0.8f, 1.2f));
}
 
void ACWeapon::ToggleAutoFire()
{
	bAutoFire = !bAutoFire;
}

평상시 Camera Lag 있도록 설정

SetData(ACharacter* InOwner) 내에
- springArm->bEnableCameraLag = bEnableCameraLag; 넣어준다.
CWeapon_AR4 내에도 Camera Lag 설정을 해준다.

새롭게 선언한 함수 정의

void ACWeapon::ToggleAutoFire() { bAutoFire = !bAutoFire; }

총기반동 구현 (총기반동으로 발사 후 Aim이 위로 조금 올라오는것을 구현한다)

Owner->AddControllerPitchInput(-RecoilRate * UKismetMathLibrary::RandomFloatInRange(0.8f, 1.2f));
- RecoilRate이 클수록 반동을 크다.

Set Timer 설정방법

GetWorld 내의 GetTimerManager의 SetTimer를 사용한다.

CWeapon_AR4

CWeapon_AR4.h

 #pragma once
#include "CoreMinimal.h"
#include "Weapons/CWeapon.h"
#include "CWeapon_AR4.generated.h"
 
UCLASS()
class U2212_04_API ACWeapon_AR4 : public ACWeapon
{
	GENERATED_BODY()
 
public:
	ACWeapon_AR4();
};

CWeapon_AR4.cpp

 #include "Weapons/CWeapon_AR4.h"
#include "Global.h"
#include "Components/SkeletalMeshComponent.h"
#include "Animation/AnimMontage.h"
#include "Camera/CameraShake.h"
#include "Widgets/CUserWidget_CrossHair.h"
 
ACWeapon_AR4::ACWeapon_AR4()
{
	USkeletalMesh* mesh;
	CHelpers::GetAsset<USkeletalMesh>(&mesh, "SkeletalMesh'/Game/FPS_Weapon_Bundle/Weapons/Meshes/AR4/SK_AR4.SK_AR4'");
	Mesh->SetSkeletalMesh(mesh);
 
	//Equip
	{
		HolsterSocketName = "Rifle_AR4_Holster";
		CHelpers::GetAsset<UAnimMontage>(&EquipMontage, "AnimMontage'/Game/Character/Animations/Rifle_Equip_Montage.Rifle_Equip_Montage'");
		EquipMontage_PlayRate = 2.0f;
		RightHandSocketName = "Rifle_AR4_RightHand";
		LeftHandLocation = FVector(-32.5f, 15.5f, 7);
	}
 
	//Aim
	{
		BaseData.bEnableCameraLag = true;
		BaseData.TargetArmLength = 200;
		BaseData.SocketOffset = FVector(0, 50, 15);
		BaseData.FieldOfView = 90;
 
		AimData.bEnableCameraLag = false;
		AimData.TargetArmLength = 80;
		AimData.SocketOffset = FVector(0, 55, 10);
		AimData.FieldOfView = 65;
	}
 
	//Fire
	{
		RecoilAngle = 0.75f;
		CHelpers::GetClass<UMatineeCameraShake>(&CameraShakeClass, "Blueprint'/Game/Weapons/BP_CameraShake_AR4.BP_CameraShake_AR4_C'");
		AutoFireInterval = 0.15f; //연사 시간간격
		RecoilRate = 0.05f;
	}
 
	//UI
	{
		CHelpers::GetClass<UCUserWidget_CrossHair>(&CrossHairClass, "WidgetBlueprint'/Game/Widgets/WB_CrossHair.WB_CrossHair_C'");
	}
}

Fire 관련 변수 기본값 설정

AutoFireInterval = 0.15f
RecoilRate = 0.05f

UI를 넣어준다. (CrossHair)

CWeaponComponent

CWeaponComponent.h

 #pragma once
#include "CoreMinimal.h"
#include "Components/ActorComponent.h"
#include "CWeaponComponent.generated.h"
 
//BlueprintType을 써서 BP에서 공개되게 한다. 추후에 Animation BP에서 다루어야 한다. 추후에 switch로 Weapon Blending을 할 것이다.
UENUM(BlueprintType) 
enum class EWeaponType : uint8
{
	AR4, AK47, Pistol, Max,
};
 
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FWeaponTypeChanged, EWeaponType, InPrevType, EWeaponType, InNewType);
 
 
UCLASS( ClassGroup=(Custom), meta=(BlueprintSpawnableComponent) )
class U2212_04_API UCWeaponComponent : public UActorComponent
{
	GENERATED_BODY()
 
private:
	UPROPERTY(EditAnywhere, Category = "Settings")
		TArray<TSubclassOf<class ACWeapon>> WeaponClasses; //Spawn시킬 때 class 타입을 TSubclassOf로 명시해준다. TArray는 그것에 대한 배열이다.
 
	UPROPERTY(EditAnywhere, Category = "Settings")
		TSubclassOf<class UCUserWidget_HUD> HUDClass;
 
public:
	FORCEINLINE bool IsUnarmedMode() { return Type == EWeaponType::Max; }//Max는 아무것도 선택안한 상황.
	FORCEINLINE bool IsAR4Mode() { return Type == EWeaponType::AR4; }
	FORCEINLINE bool IsAK47Mode() { return Type == EWeaponType::AK47; }
	FORCEINLINE bool IsPistolMode() { return Type == EWeaponType::Pistol; }
 
public:	
	// Sets default values for this component's properties
	UCWeaponComponent();
 
protected:
	// Called when the game starts
	virtual void BeginPlay() override;
 
public:	
	// Called every frame
	virtual void TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction) override;
 
private:
	class ACWeapon* GetCurrWeapon();//현재 무기를 리턴
 
public:
	void SetUnarmedMode();
	void SetAR4Mode();
	//void SetAK47Mode();
	//void SetPistolMode();
 
private:
	void SetMode(EWeaponType InType);
	void ChangeType(EWeaponType InType);
 
public:
	void Begin_Equip();
	void End_Equip();
 
public:
	void Begin_Aim();
	void End_Aim();
 
public:
	void Begin_Fire();
	void End_Fire();
 
public:
	bool IsInAim();
	FVector GetLeftHandLocation();
 
public:
	void ToggleAutoFire();
 
public:
	FWeaponTypeChanged OnWeaponTypeChanged;
 
private:
	EWeaponType Type = EWeaponType::Max; //Max는 아무것도 선택안한 상황.
 
private:
	class ACPlayer* Owner; //플레이어 변수
	TArray<class ACWeapon*> Weapons; //무기 배열 변수
	class UCUserWidget_HUD* HUD;
};

CWeaponComponent.cpp

 #include "Weapons/CWeaponComponent.h"
#include "Global.h"
#include "CWeapon.h"
#include "Character/CPlayer.h"
#include "Widgets/CUserWidget_HUD.h"
 
UCWeaponComponent::UCWeaponComponent()
{
	PrimaryComponentTick.bCanEverTick = true;
 
	CHelpers::GetClass<UCUserWidget_HUD>(&HUDClass, "WidgetBlueprint'/Game/Widgets/WB_HUB.WB_HUB_C'");
}
 
void UCWeaponComponent::BeginPlay()
{
	Super::BeginPlay();
 
	Owner = Cast<ACPlayer>(GetOwner());
	CheckNull(Owner);
 
	FActorSpawnParameters params;
	params.Owner = Owner;
	params.SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod::AlwaysSpawn;
 
	//받은 타입을 Spawn 시킨다.
	for(TSubclassOf<ACWeapon> weaponClass : WeaponClasses)
	{
		if(!!weaponClass)
		{
			ACWeapon* weapon = Owner->GetWorld()->SpawnActor<ACWeapon>(weaponClass, params);//weaponClass 타입으로 Spawn시킨다.
			Weapons.Add(weapon);
		}
	}
 
	if(!!HUDClass)
	{
		HUD = CreateWidget<UCUserWidget_HUD, APlayerController>(Owner->GetController<APlayerController>(), HUDClass);
		HUD->AddToViewport(); //Viewport에 추가
		HUD->SetVisibility(ESlateVisibility::Hidden);//숨김
	}
 
}
 
 
// Called every frame
void UCWeaponComponent::TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction)
{
	Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
 
	if (!!HUD)
	{
		if (!!GetCurrWeapon()) //현재 무기가 있다면
			GetCurrWeapon()->IsAutoFire() ? HUD->OnAutoFire() : HUD->OffAutoFire(); //연사 3항 연산자 OnOff 스위치
		else //현재 무기가 없다면
			HUD->OffAutoFire(); //연사 해제
	}
 
}
 
ACWeapon* UCWeaponComponent::GetCurrWeapon()
{
	CheckTrueResult(IsUnarmedMode(), nullptr);//IsUnarmedMode가 true면 무기 리턴해줄수 없으므로 nullptr로 리턴 
 
	return Weapons[(int32)Type]; //BP의 to int //현재 선택된 Weapon을 리턴해준다.
}
 
void UCWeaponComponent::SetUnarmedMode()
{
	CheckFalse(GetCurrWeapon()->CanUnequip());//현재 무기가 해제될 수 있는지 체크
 
	GetCurrWeapon()->Unequip(); //무기 해제
	ChangeType(EWeaponType::Max);//현재 무기를 Max로 바꾸어줌(Max는 아무것도 선택안한 상태)
 
	HUD->SetVisibility(ESlateVisibility::Hidden);//무기가 없을때 화면에서 숨겨준다.
}
 
void UCWeaponComponent::SetAR4Mode()
{
	SetMode(EWeaponType::AR4);
}
 
void UCWeaponComponent::SetMode(EWeaponType InType)
{
	if(Type == InType) //현재 무기와 장착하려는 무기가 같은 경우
	{
		SetUnarmedMode(); //무기 장착 해제
 
		return; //무기 장착 해제 후 리턴
	}
	else if (IsUnarmedMode() == false)
	{
		CheckFalse(GetCurrWeapon()->CanUnequip());//현재 무기가 해제될 수 있는지 체크
 
		GetCurrWeapon()->Unequip(); //무기 해제
	}
 
	CheckNull(Weapons[(int32)InType]); //장착될 무기가 있는지 체크
	CheckFalse(Weapons[(int32)InType]->CanEquip());//장착될 무기가 장착될 수 있는 상황인지 체크
 
	Weapons[(int32)InType]->Equip(); // 무기 장착
 
	ChangeType(InType); //무기 변경 알려줌
 
	if (!!HUD)
		HUD->SetVisibility(ESlateVisibility::Visible);//화면에 보이도록 켜줌.
 
}
 
void UCWeaponComponent::ChangeType(EWeaponType InType)
{
	EWeaponType type = Type;
	Type = InType; //기존의 무기 타입에서 바뀐 무기 타입을 넣어줌.
 
	if (OnWeaponTypeChanged.IsBound())
		OnWeaponTypeChanged.Broadcast(type, InType);//기존 무기 타입, 바뀐 무기 타입
	
}
 
void UCWeaponComponent::Begin_Equip()
{
	CheckNull(GetCurrWeapon());
 
	GetCurrWeapon()->Begin_Equip();
}
 
void UCWeaponComponent::End_Equip()
{
	CheckNull(GetCurrWeapon());
 
	GetCurrWeapon()->End_Equip();
}
 
void UCWeaponComponent::Begin_Aim()
{
	CheckNull(GetCurrWeapon());
 
	GetCurrWeapon()->Begin_Aim();
}
 
void UCWeaponComponent::End_Aim()  
{
	CheckNull(GetCurrWeapon());
 
	GetCurrWeapon()->End_Aim();
}
 
void UCWeaponComponent::Begin_Fire()
{
	CheckNull(GetCurrWeapon());
	CheckFalse(GetCurrWeapon()->CanFire());
 
	GetCurrWeapon()->Begin_Fire();
}
 
void UCWeaponComponent::End_Fire()
{
	CheckNull(GetCurrWeapon());
 
	GetCurrWeapon()->End_Fire();
}
 
bool UCWeaponComponent::IsInAim()
{
	CheckNullResult(GetCurrWeapon(), false);
 
	return GetCurrWeapon()->IsInAim();
}
 
FVector UCWeaponComponent::GetLeftHandLocation()
{
	CheckNullResult(GetCurrWeapon(), FVector::ZeroVector);
 
	return GetCurrWeapon()->GetLeftHandLocation();
}
 
void UCWeaponComponent::ToggleAutoFire()
{
	CheckNull(GetCurrWeapon());
 
	GetCurrWeapon()->ToggleAutoFire();
}

TickComponent에서 HUD의 연사모드 On Off를 보여주는것을 조정한다.

void UCWeaponComponent::TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction)
- 현재 무기가 있다면, 화면에 표시되는 연사 On Off를 3항 연산자로 바꾸어준다.
- 현재 무기가 없다면, 화면에 표시되는 연사 Off로 바꾸어준다.

HUD, Cross Hair 넣기

CPlayer

CPlayer.h

 #pragma once
 
#include "CoreMinimal.h"
#include "GameFramework/Character.h"
#include "CPlayer.generated.h"
 
UCLASS()
class U2212_04_API ACPlayer : public ACharacter
{
	GENERATED_BODY()
 
private:
	UPROPERTY(EditDefaultsOnly, Category = "Camera")
		FVector2D PitchRange = FVector2D(-40, +40);
 
private:
	UPROPERTY(VisibleAnywhere)
		class USpringArmComponent* SpringArm;
 
	UPROPERTY(VisibleAnywhere)
		class UCameraComponent* Camera;
 
private:
	UPROPERTY(VisibleAnywhere)
		class UCWeaponComponent* Weapon;
 
public:
	ACPlayer();
 
protected:
	virtual void BeginPlay() override;
 
public:	
	virtual void Tick(float DeltaTime) override;
	virtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;
 
private:
	void OnMoveForward(float InAxisValue);
	void OnMoveRight(float InAxisValue);
	void OnHorizontalLook(float InAxisValue);
	void OnVerticalLook(float InAxisValue);
 
private:
	void OnRun();
	void OffRun();
};

변동사항 없음

CPlayer.cpp

 #include "CPlayer.h"
#include "Global.h"
#include "CAnimInstance.h"
#include "Weapons/CWeaponComponent.h"
#include "GameFramework/SpringArmComponent.h"
#include "GameFramework/CharacterMovementComponent.h"
#include "Camera/CameraComponent.h"
#include "Components/CapsuleComponent.h"
#include "Components/InputComponent.h"
#include "Materials/MaterialInstanceDynamic.h"
 
ACPlayer::ACPlayer()
{
	PrimaryActorTick.bCanEverTick = true;
 
	CHelpers::CreateComponent<USpringArmComponent>(this, &SpringArm, "SpringArm", GetCapsuleComponent());
	CHelpers::CreateComponent<UCameraComponent>(this, &Camera, "Camera", SpringArm);
 
	CHelpers::CreateActorComponent<UCWeaponComponent>(this, &Weapon, "Weapon");
 
	USkeletalMesh* mesh;
	CHelpers::GetAsset<USkeletalMesh>(&mesh, "SkeletalMesh'/Game/Character/Mesh/SK_Mannequin.SK_Mannequin'");
	GetMesh()->SetSkeletalMesh(mesh);
	GetMesh()->SetRelativeLocation(FVector(0, 0, -90));
	GetMesh()->SetRelativeRotation(FRotator(0, -90, 0));
 
	
	TSubclassOf<UCAnimInstance> animInstance;
	CHelpers::GetClass<UCAnimInstance>(&animInstance, "AnimBlueprint'/Game/Player/ABP_Player.ABP_Player_C'");
	GetMesh()->SetAnimClass(animInstance);
 
 
	GetCharacterMovement()->MaxWalkSpeed = 400;
 
 
	SpringArm->SetRelativeLocation(FVector(0, 0, 60));
	SpringArm->TargetArmLength = 200;
	SpringArm->bUsePawnControlRotation = true;
	SpringArm->bEnableCameraLag = true;
 
}
 
void ACPlayer::BeginPlay()
{
	Super::BeginPlay(); //Super가 BP의 BeginPlay를 콜한다.
 
	GetController<APlayerController>()->PlayerCameraManager->ViewPitchMin = PitchRange.X; //각 제한 걸기
	GetController<APlayerController>()->PlayerCameraManager->ViewPitchMax = PitchRange.Y; //각 제한 걸기
}
 
void ACPlayer::Tick(float DeltaTime)
{
	Super::Tick(DeltaTime);
 
}
 
void ACPlayer::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{
	Super::SetupPlayerInputComponent(PlayerInputComponent);
 
	PlayerInputComponent->BindAxis("MoveForward", this, &ACPlayer::OnMoveForward);
	PlayerInputComponent->BindAxis("MoveRight", this, &ACPlayer::OnMoveRight);
	PlayerInputComponent->BindAxis("HorizontalLook", this, &ACPlayer::OnHorizontalLook);
	PlayerInputComponent->BindAxis("VerticalLook", this, &ACPlayer::OnVerticalLook);
 
	PlayerInputComponent->BindAction("Run", EInputEvent::IE_Pressed, this, &ACPlayer::OnRun);
	PlayerInputComponent->BindAction("Run", EInputEvent::IE_Released, this, &ACPlayer::OffRun);
 
	PlayerInputComponent->BindAction("AR4", EInputEvent::IE_Pressed, Weapon, &UCWeaponComponent::SetAR4Mode);//Object를 Weapon으로 받는다.
 
	PlayerInputComponent->BindAction("Aim", EInputEvent::IE_Pressed, Weapon, &UCWeaponComponent::Begin_Aim);
	PlayerInputComponent->BindAction("Aim", EInputEvent::IE_Released, Weapon, &UCWeaponComponent::End_Aim);
 
	PlayerInputComponent->BindAction("Fire", EInputEvent::IE_Pressed, Weapon, &UCWeaponComponent::Begin_Fire);
	PlayerInputComponent->BindAction("Fire", EInputEvent::IE_Released, Weapon, &UCWeaponComponent::End_Fire);
 
	PlayerInputComponent->BindAction("AutoFire", EInputEvent::IE_Pressed, Weapon, &UCWeaponComponent::ToggleAutoFire);
 
}
 
void ACPlayer::OnMoveForward(float InAxisValue)
{
	FRotator rotator = FRotator(0, GetControlRotation().Yaw, 0);
	FVector direction = FQuat(rotator).GetForwardVector();
 
	AddMovementInput(direction, InAxisValue);
}
 
void ACPlayer::OnMoveRight(float InAxisValue)
{
	FRotator rotator = FRotator(0, GetControlRotation().Yaw, 0);
	FVector direction = FQuat(rotator).GetRightVector();
 
	AddMovementInput(direction, InAxisValue);
}
 
void ACPlayer::OnHorizontalLook(float InAxisValue)
{
	AddControllerYawInput(InAxisValue);
}
 
void ACPlayer::OnVerticalLook(float InAxisValue)
{
	AddControllerPitchInput(InAxisValue);
}
 
void ACPlayer::OnRun()
{
	GetCharacterMovement()->MaxWalkSpeed = 600;
}
 
void ACPlayer::OffRun()
{
	GetCharacterMovement()->MaxWalkSpeed = 400;
}

언리얼 - 프로젝트 세팅 - 입력 - 액션매핑에 넣어준 AutoFire 키입력을 CPlayer에 넣어준다.

PlayerInputComponent->BindAction("AutoFire", EInputEvent::IE_Pressed, Weapon, &UCWeaponComponent:: ToggleAutoFire);

이것 이외의 변동사항 없음.

WB_CrossHair 생성

유저 인터페이스 - 위젯 블루프린트 - WB_CrossHair 생성

Designer

Graph

노드 없음.

CUserWidget_CrossHair 생성

C++ 클래스 추가 - UserWidget - CUserWidget_CrossHair 생성

CUserWidget_CrossHair.h

 #pragma once
#include "CoreMinimal.h"
#include "Blueprint/UserWidget.h"
#include "CUserWidget_CrossHair.generated.h"
 
UCLASS()
class U2212_04_API UCUserWidget_CrossHair : public UUserWidget
{
	GENERATED_BODY()
 
protected:
	void NativeOnInitialized() override; 
	void NativeTick(const FGeometry& MyGeometry, float InDeltaTime);
 
private:
	TArray<class UBorder*> Borders;
	TArray<FVector2D> Alignments;
};

CUserWidget_CrossHair.cpp

 #include "Widgets/CUserWidget_CrossHair.h"
#include "Global.h"
#include "Blueprint/WidgetTree.h"
#include "Blueprint/WidgetLayoutLibrary.h"
#include "Components/CanvasPanel.h"
#include "Components/CanvasPanelSlot.h"
#include "Components/Border.h"
 
//#define LOG_UCUserWidget_CrossHair 1
 
void UCUserWidget_CrossHair::NativeOnInitialized()
{
	Super::NativeOnInitialized();
 
	UCanvasPanel* panel = Cast<UCanvasPanel>(WidgetTree->RootWidget);//RootWidget은 CrossHair로 만든 Top,Bottom,Right,Left를 모두 포함한다.
	CheckNull(panel);
 
	TArray<UWidget*> widgets = panel->GetAllChildren();
	for (UWidget* widget : widgets)
	{
		UBorder* border = Cast<UBorder>(widget); //border를 가져온다.
		if (border == nullptr) continue;
 
		Borders.Add(border);
 
		UCanvasPanelSlot* slot = UWidgetLayoutLibrary::SlotAsCanvasSlot(border);
		Alignments.Add(slot->GetAlignment());
	}
 
#if LOG_UCUserWidget_CrossHair
	for (int32 i = 0; i < Borders.Num(); i++)
	{
		UBorder* border = Borders[i];
 
		CLog::Log(border->GetName());
		CLog::Log(Alignments[i].ToString());
	}
#endif
}
 
void UCUserWidget_CrossHair::NativeTick(const FGeometry& MyGeometry, float InDeltaTime)
{
	Super::NativeTick(MyGeometry, InDeltaTime);
}

Construct가 먼저 실행되고 그 후에 OnInitialize가 실행된다.

실행화면

ABP: Animation Blueprint
AN: Blueprint Class AnimNotify
ANS: Blueprint Class - AnimNotifyState

AO: Aim Offset

BP: Blueprint Class
BS: Blend Space

BF: Blueprint Function Library
CS: Matinee Camera Shake
E: Enum 열거형
DT: Data Table
F: 구조체

I: Blueprint Interface

WB: Widget Bluepprint

UE2212_04

	Level - LEVEL
Character	Animation	Rifle
		Unarmed
		Rifle_Equip_Montage
	BlendSpaces	AO_Rifle_Aim AO_Rifle_Idle BS_Rifle BS_Rifle_Aim BS_Unarme
	Materials	MaterialLayers
	Materials	M_UE4Man_Body M_UE4Man_ChestLogo
	Mesh	SK_Mannequin SK_MAnnequin_PhysicsAsset Skel_Mannequin
	Montages
	Montages
	Textures	UE4_LOGO_CARD UE4_Mannequin__normals UE4_Mannequin_MAT_MASKA UE4Man_Logo_N
	Weapons	Elven Bow
		Greate Hammer
		Sword
Effects	Materials
	Meshes
	Texture
	P_Eject_bullet P_Impact_Default P_Muzzleflash
Environment	Materials	Textures
	Meshes
	Obstacle
FPS_Weapon_Bundle	Weapons	Material
		Meshes
		Textures
Materials	Texture
Materials	M_Cursor M_Cursor_Inst M_Decal M_Mesh M_White_Inst M_Red_Inst M_Green_Inst M_Blue_Inst M_UE4Man_Body_Inst M_UE4Man_ChesLogo_Inst
Meshes	Cone_2 Cube_2 Cylinder_2 Sphere_2
Player	ABP_Player BP_Player
Sounds	S_RifleShoot
Textures	Crosshair
Weapons	BP_CameraShake_AR4 BP_CWeapon_AR4
Weapons
Widgets	NotoSansKR-Black NotoSansKR-Black_Font WB_CrossHair WB_HUB

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[UE] 총알 연사, HUD & CrossHair

연사(AutoFire) 구현하기

CWeapon

CWeapon_AR4

CWeaponComponent

HUD, Cross Hair 넣기

CPlayer

WB_CrossHair 생성

CUserWidget_CrossHair 생성

실행화면

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내 블로그

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모든 영역

연사(AutoFire) 구현하기

CWeapon

CWeapon_AR4

CWeaponComponent

HUD, Cross Hair 넣기

CPlayer

WB_CrossHair 생성

CUserWidget_CrossHair 생성

실행화면

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다른 글

[UE] 재장전(탄창 생성 및 제거)

[UE] 총알 & 재장전 구현. Bullet, Magazine, Reload

[UE] 총알 발사 구현하기

[UE] Hand IK, AnimInstance, Fire

티스토리툴바

단축키

내 블로그

블로그 게시글

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