Ue4 客户端与服务器交互的官方例子

最新推荐文章于 2022-11-20 16:13:24 发布

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最新推荐文章于 2022-11-20 16:13:24 发布 · 2.5k 阅读

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#ue4 #服务器 #交互

这个博客详细介绍了在Unreal Engine中创建一个第三人称多人在线游戏项目的部分代码，包括投射物（ThirdPersonMPProjectile）的实现，它拥有爆炸效果和伤害计算功能。此外，还涵盖了角色（ThirdPersonMPCharacter）的健康值系统、射击机制以及与投射物的交互。代码展示了如何处理碰撞检测、生命值更新以及触控输入等关键功能。

ThirdPersonMPProjectile.h

// 版权所有 1998-2019 Epic Games, Inc。保留所有权利。

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "ThirdPersonMPProjectile.generated.h"

class UParticleSystem;
class UStaticMeshComponent;
class USphereComponent;
class UProjectileMovementComponent;
class UDamageType;

UCLASS()
class THIRDPERSONMP_API AThirdPersonMPProjectile : public AActor
{
    GENERATED_BODY()

public: 
    // 为此Actor的属性设置默认值
    AThirdPersonMPProjectile();

    // 此投射物的基本组件
    UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="Components")
    USphereComponent* SphereComponent;
    UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="Components")
    UStaticMeshComponent* StaticMesh;
    UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="Components")
    UProjectileMovementComponent* ProjectileMovementComponent;
    UPROPERTY(EditAnywhere, Category = "Effects")
    UParticleSystem* ExplosionEffect;

    //此投射物将造成的伤害类型和伤害。
    UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "Damage")
    TSubclassOf<UDamageType> DamageType;
    UPROPERTY(EditAnywhere, BlueprintReadOnly, Category="Damage")
    float Damage;

protected:
    // 当游戏开始或生成时调用
    virtual void BeginPlay() override;

    UFUNCTION()
    void OnProjectileImpact(UPrimitiveComponent* HitComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, FVector NormalImpulse, const FHitResult& Hit);

    void Destroyed() override;

public: 
    // 每一帧调用
    virtual void Tick(float DeltaTime) override;
};

ThirdPersonMPProjectile.cpp

// 版权所有 1998-2019 Epic Games, Inc。保留所有权利。

#include "ThirdPersonMPProjectile.h"
#include "Components/SphereComponent.h"
#include "Components/StaticMeshComponent.h"
#include "GameFramework/ProjectileMovementComponent.h"
#include "GameFramework/DamageType.h"
#include "Particles/ParticleSystem.h"
#include "Kismet/GameplayStatics.h"
#include "UObject/ConstructorHelpers.h"
#include "IDamageInterface.h"

// 设置默认值
AThirdPersonMPProjectile::AThirdPersonMPProjectile()
{
    // 将此Actor设置为每一帧调用Tick()。如果不需要，可以关闭此选项来提高性能。
    PrimaryActorTick.bCanEverTick = true;

    bReplicates = true;

    DamageType = UDamageType::StaticClass();
    Damage = 10.0f;

    static ConstructorHelpers::FObjectFinder<UParticleSystem> DefaultExplosionEffect(TEXT("/Game/StarterContent/Particles/P_Explosion.P_Explosion"));
    if (DefaultExplosionEffect.Succeeded())
    {
        ExplosionEffect = DefaultExplosionEffect.Object;
    }

    //定义将作为投射物及其碰撞的根组件的SphereComponent。
    SphereComponent = CreateDefaultSubobject<USphereComponent>(TEXT("RootComponent"));
    SphereComponent->InitSphereRadius(12.5f);
    SphereComponent->SetCollisionProfileName(TEXT("BlockAllDynamic"));
    RootComponent = SphereComponent;

    //在击中事件上注册此投射物撞击函数。
    if (GetLocalRole() == ROLE_Authority)
    {
        SphereComponent->OnComponentHit.AddDynamic(this, &AThirdPersonMPProjectile::OnProjectileImpact);
    }

    //定义将作为视觉呈现的网格体。
    static ConstructorHelpers::FObjectFinder<UStaticMesh> DefaultMesh(TEXT("/Game/StarterContent/Shapes/Shape_Sphere.Shape_Sphere"));
    StaticMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("Mesh"));
    StaticMesh->SetupAttachment(RootComponent);

    if (DefaultMesh.Succeeded())
    {
        StaticMesh->SetStaticMesh(DefaultMesh.Obje

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