UE4 手动创建一个第一人称游戏

创建一个第一人称游戏"/>

UE4 手动创建一个第一人称游戏

根据UE4官方文档，自己动手创建一个第一人称射击游戏。文档详细地址：UE4官方文档第一人称射击游戏

1. 定义角色
   FPSCharacter.h

// Fill out your copyright notice in the Description page of Project Settings.#pragma once#include "CoreMinimal.h"
#include "GameFramework/Character.h"
#include "FPSCharacter.generated.h"UCLASS()
class FPSPROJECT_API AFPSCharacter : public ACharacter {GENERATED_BODY()public:// Sets default values for this character's propertiesAFPSCharacter();//枪口的偏移位置UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "AAA")FVector MuzzleOffset;protected:// Called when the game starts or when spawnedvirtual void BeginPlay() override;public:// Called every framevirtual void Tick(float DeltaTime) override;// Called to bind functionality to inputvirtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;private://向前或者向后移动UFUNCTION()void MoveForward(float Value);//向左或者向右移动UFUNCTION()void MoveRight(float Value);UFUNCTION()void StartJump();UFUNCTION()void StopJump();UFUNCTION()void Fire();//摄像机组件/*** 如果不添加摄像机组件的话，会有一个默认的摄像机组件，并且在模型脖子的位置*/UPROPERTY(VisibleAnywhere, Category = "AAA")class UCameraComponent* FPSCameraComponent;//设置第一人称的网格体组件UPROPERTY(VisibleAnywhere, Category = "AAA")class USkeletalMeshComponent* FPSMesh;//生产发射物类/*** TSubclassOf 是提供的UClass类型安全模板类*/UPROPERTY(EditDefaultsOnly, Category = "AAA")TSubclassOf<class AFPSProjectile> ProjectileClass;};

FPSCharacter.cpp

// Fill out your copyright notice in the Description page of Project Settings.#include "FPSCharacter.h"
#include "Engine/Engine.h"
#include "Camera/CameraComponent.h"
#include "Components/CapsuleComponent.h"
#include "Components/SkeletalMeshComponent.h"
#include "FPSProjectile.h"// Sets default values
AFPSCharacter::AFPSCharacter() {// Set this character to call Tick() every frame.  You can turn this off to improve performance if you don't need it.PrimaryActorTick.bCanEverTick = true;FPSCameraComponent = CreateDefaultSubobject<UCameraComponent>(TEXT("FPSCameraComponent"));//将摄像机组件放到胶囊体下面
#if 0FPSCameraComponent->SetupAttachment(GetRootComponent());
#elseFPSCameraComponent->SetupAttachment(Cast<UCapsuleComponent>(GetCapsuleComponent()));
#endif//将摄像机放到眼睛上方不远处FPSCameraComponent->SetRelativeLocation(FVector(0.0, 0.0, 50.0 + BaseEyeHeight));//使用Pawn来控制摄像机旋转FPSCameraComponent->bUsePawnControlRotation = true;//设置第一人称骨骼模型FPSMesh = CreateDefaultSubobject<USkeletalMeshComponent>(TEXT("FirstPersonMesh"));//设置该模型仅对玩家可见FPSMesh->SetOnlyOwnerSee(true);//设置根组件FPSMesh->SetupAttachment(FPSCameraComponent);//禁用部分环境阴影，保留单一模型存在的假象FPSMesh->bCastDynamicShadow = false;//动态阴影FPSMesh->CastShadow = false;//投影//拥有玩家无法看到普通（第三人称）身体模型GetMesh()->SetOwnerNoSee(true);
}// Called when the game starts or when spawned
void AFPSCharacter::BeginPlay() {Super::BeginPlay();GEngine->AddOnScreenDebugMessage(-1, 5.0f, FColor::Red, TEXT("We are using FPSCharacter."));
}// Called every frame
void AFPSCharacter::Tick(float DeltaTime) {Super::Tick(DeltaTime);}// Called to bind functionality to input
void AFPSCharacter::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent) {Super::SetupPlayerInputComponent(PlayerInputComponent);PlayerInputComponent->BindAxis(TEXT("MoveForward"), this, &AFPSCharacter::MoveForward);PlayerInputComponent->BindAxis(TEXT("MoveRight"), this, &AFPSCharacter::MoveRight);PlayerInputComponent->BindAxis("Turn", this, &AFPSCharacter::AddControllerYawInput);PlayerInputComponent->BindAxis("LookUp", this, &AFPSCharacter::AddControllerPitchInput);PlayerInputComponent->BindAction("Jump", IE_Pressed, this, &AFPSCharacter::StartJump);PlayerInputComponent->BindAction("Jump", IE_Released, this, &AFPSCharacter::StopJump);PlayerInputComponent->BindAction("Fire", IE_Pressed, this, &AFPSCharacter::Fire);
}void AFPSCharacter::MoveForward(float Value) {FVector direction = FRotationMatrix(Controller->GetControlRotation()).GetScaledAxis(EAxis::X);AddMovementInput(direction, Value);
}void AFPSCharacter::MoveRight(float Value) {FVector direction = FRotationMatrix(Controller->GetControlRotation()).GetScaledAxis(EAxis::Y);AddMovementInput(direction, Value);
}void AFPSCharacter::StartJump() {bPressedJump = true;
}void AFPSCharacter::StopJump() {bPressedJump = false;
}void AFPSCharacter::Fire() {if (ProjectileClass){//获取摄像机的视点变换的位置FVector CameraLocation;FRotator CameraRotation;GetActorEyesViewPoint(CameraLocation, CameraRotation);//枪口的本地坐标装换成世界坐标FVector MuzzleLoacation = CameraLocation + FTransform(CameraRotation).TransformVector(MuzzleOffset);FRotator MuzzleRotator = CameraRotation;//枪口向上抬起10.0度MuzzleRotator.Pitch += 10.0;UWorld* world = GetWorld();if (world){//生成物参数，也就是生产子弹的参数FActorSpawnParameters SpawnParameters;SpawnParameters.Owner = this;SpawnParameters.Instigator = GetInstigator();//在枪口出生产发射物AFPSProjectile* FPSProjectile = world->SpawnActor<AFPSProjectile>(ProjectileClass, MuzzleLoacation, MuzzleRotator, SpawnParameters);//设置发射物的初始轨道FVector LaunchDirection = MuzzleRotator.Vector();FPSProjectile->FireInDirection(LaunchDirection);}}
}

2. HUD

// Fill out your copyright notice in the Description page of Project Settings.#pragma once#include "CoreMinimal.h"
#include "GameFramework/HUD.h"
#include "FPSHUD.generated.h"/****/
UCLASS()
class FPSPROJECT_API AFPSHUD : public AHUD {GENERATED_BODY()public:virtual void DrawHUD()override;UPROPERTY(EditAnywhere)UTexture2D* CrosshairTexture;
};

// Fill out your copyright notice in the Description page of Project Settings.#include "FPSHUD.h"
#include "Engine/Canvas.h"void AFPSHUD::DrawHUD() {Super::DrawHUD();if (CrosshairTexture){//找到画布的中心FVector2D Center(Canvas->ClipX * 0.5f, Canvas->ClipY * 0.5f);FVector2D CrossHairDrawPosition(Center.X - (CrosshairTexture->GetSurfaceWidth() * 0.5), Center.Y - (CrosshairTexture->GetSurfaceHeight() * 0.5));FCanvasTileItem TileItem(CrossHairDrawPosition,CrosshairTexture->Resource, FLinearColor::White);Canvas->DrawItem(TileItem);}
}

3. 子弹类

// Fill out your copyright notice in the Description page of Project Settings.#pragma once#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "FPSProjectile.generated.h"/**
* 子弹类
*/UCLASS()
class FPSPROJECT_API AFPSProjectile : public AActor {GENERATED_BODY()public:// Sets default values for this actor's propertiesAFPSProjectile();protected:// Called when the game starts or when spawnedvirtual void BeginPlay() override;public:// Called every framevirtual void Tick(float DeltaTime) override;public://球体碰撞组件UPROPERTY(VisibleDefaultsOnly, Category = "AAA")class USphereComponent* CollisionComponment;//子弹组件UPROPERTY(VisibleAnywhere, Category = "AAA")class UStaticMeshComponent* ProjectileComponent;UPROPERTY(VisibleAnywhere, Category = "AAA")class UProjectileMovementComponent* ProjectileMovementComponent;//在发射方向上设置在发射物的初始速度void FireInDirection(const FVector& ShootDirection);};

// Fill out your copyright notice in the Description page of Project Settings.#include "FPSProjectile.h"
#include "Components/SphereComponent.h"
#include "GameFramework/ProjectileMovementComponent.h"// Sets default values
AFPSProjectile::AFPSProjectile() {// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.PrimaryActorTick.bCanEverTick = true;//碰撞球体CollisionComponment = CreateDefaultSubobject<USphereComponent>(TEXT("SphereComponent"));CollisionComponment->SetSphereRadius(15.0);//设置球体半径RootComponent = Cast<USceneComponent>(CollisionComponment);//静态网格体ProjectileComponent = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("ProjectileComponent"));ProjectileComponent->SetupAttachment(RootComponent);//运动组件ProjectileMovementComponent = CreateDefaultSubobject<UProjectileMovementComponent>(TEXT("ProjectileMovementComponent"));ProjectileMovementComponent->SetUpdatedComponent(CollisionComponment);//设置更新的组件//设置碰撞预设CollisionComponment->BodyInstance.SetCollisionProfileName(TEXT("Projectile"));ProjectileMovementComponent->InitialSpeed = 3000.0;//设置初始速度ProjectileMovementComponent->MaxSpeed = 3000.0;//设置最大速度//这个子弹在旋转过程中在每一帧中都要更新，以匹配他的速度方向ProjectileMovementComponent->bRotationFollowsVelocity = true;//设置反弹ProjectileMovementComponent->bShouldBounce = true;//设置反弹系数ProjectileMovementComponent->Bounciness = 0.3;//设置重力系数ProjectileMovementComponent->ProjectileGravityScale = 0.0;//3秒后消亡InitialLifeSpan = 3.0;
}// Called when the game starts or when spawned
void AFPSProjectile::BeginPlay() {Super::BeginPlay();}// Called every frame
void AFPSProjectile::Tick(float DeltaTime) {Super::Tick(DeltaTime);}void AFPSProjectile::FireInDirection(const FVector& ShootDirection) {ProjectileMovementComponent->Velocity = ShootDirection * ProjectileMovementComponent->InitialSpeed;
}

4. 游戏模式类

// Copyright Epic Games, Inc. All Rights Reserved.#pragma once#include "CoreMinimal.h"
#include "GameFramework/GameModeBase.h"
#include "FPSProjectGameModeBase.generated.h"/*** */
UCLASS()
class FPSPROJECT_API AFPSProjectGameModeBase : public AGameModeBase
{GENERATED_BODY()
private:virtual void StartPlay()override;
};

// Copyright Epic Games, Inc. All Rights Reserved.#include "FPSProjectGameModeBase.h"
#include "Engine/Engine.h"
#include "Kismet/KismetSystemLibrary.h"void AFPSProjectGameModeBase::StartPlay() {Super::StartPlay();if (GEngine) {GEngine->AddOnScreenDebugMessage(-1, 5.0f, FColor::Yellow, TEXT("Hello World, this is FPSGameMode!"));}UKismetSystemLibrary::DrawDebugCoordinateSystem(GetWorld(), FVector(0.0, 0.0, 50.0), FRotator(0.0, 0.0, 0.0), 10.0, 100,10);UKismetSystemLibrary::DrawDebugString(GetWorld(), FVector(100.0, 0.0, 100.0), TEXT("My Name"), NULL, FLinearColor::Red, 50.0);
}

6. 具体的模型下载可以在官网链接上下载
7. UEEditor截图