UE5学习笔记8-创建一个武器的类和蓝图

news2025/1/11 22:41:02

一、目标

当人物模型和武器模型重叠时显示小窗口，按E键时拾取武器，当拾取到武器时窗口不可见，当人物靠近其他人物时(其他客户端/服务器)窗口同样不可见，在具有Authority权限的PC上同理

二、实现过程

1.创建一个武器的类命名为Weapon，在头文件中定义一个骨骼网格类(USkeletalMeshComponent)的指针，声明一个球形组件类(USphereComponent)的指针，创建一个枚举类型，设置对应的枚举属性

xxx.h

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

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

// 一个枚举类 作为蓝图的类型
UENUM(BlueprintType) /* 可以将此枚举用作蓝图中的一种类型 */
enum class EWeaponState : uint8
{
	EWS_Initial UMETA(DisplayName = "Initial State"),
	EWS_Equipped UMETA(DisplayName = "Equipped"),
	EWS_Dropped UMETA(DisplayName = "Dropped"),

	EWS_MAX UMETA(DisplayName = "DefaultMAX")
};

UCLASS()
class BLASTER_API AWeapon : public AActor
{
	GENERATED_BODY()

public:
	// Sets default values for this actor's properties
	AWeapon();
	// Called every frame
	virtual void Tick(float DeltaTime) override;

protected:
	// Called when the game starts or when spawned
	virtual void BeginPlay() override;

public:


private:
	UPROPERTY(VisibleAnywhere, Category = "Weapon Properties") // 设置在任何地方都可以看见，类别设置为武器属性
	USkeletalMeshComponent* WeapomMesh;	/* 骨骼网格 */
	UPROPERTY(VisibleAnywhere, Category = "Weapon Properties")
	class USphereComponent* AreaSphere; /* 球形组件 判断人物模型和武器模型是否重叠 */

	UPROPERTY(VisibleAnywhere)
	EWeaponState WeaponState;
};

xxx.cpp : 在cpp文件中将骨骼网格指针和球形指针初始化并对碰撞设置，在beginplay函数中设置当前是否在服务器上，如果在设置碰撞参数

// Fill out your copyright notice in the Description page of Project Settings.


#include "Weapon.h"
#include "Components/SphereComponent.h"
#include "Components/WidgetComponent.h"
#include "Net/UnrealNetwork.h"
#include "Blaster/Character/BlasterCharacter.h"

// Sets default values
AWeapon::AWeapon()
{
 	// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
	PrimaryActorTick.bCanEverTick = false;
	bReplicates = true; //将执行组件复制到远程计算机 //由于想要将武器在服务器上判断是否碰撞，需要将武器作为一个actor复制到服务器上

	WeapomMesh = CreateDefaultSubobject<USkeletalMeshComponent>(TEXT("WeaponMesh")); //创建骨骼网格提成员，名字是WeaponMesh
	//WeapomMesh->SetupAttachment(RootComponent); //一个组件附加到另一个组件上
	SetRootComponent(WeapomMesh);//设置根组件

	// 当拿起武器时设置为完全阻止SetCollisionResponseToAllChannels(ECollisionResponse::ECR_Block)
	// 当丢掉武器时设置为设置为忽略，即没有碰撞SetCollisionResponseToChannel(ECollisionChannel::ECC_Pawn, ECollisionResponse::ECR_Ignore)
	// 当武器在地上时设置无碰撞SetCollisionEnabled(ECollisionEnabled::NoCollision) 
	WeapomMesh->SetCollisionResponseToAllChannels(ECollisionResponse::ECR_Block); //将碰撞响应设置为完全阻止
	WeapomMesh->SetCollisionResponseToChannel(ECollisionChannel::ECC_Pawn, ECollisionResponse::ECR_Ignore);//当放下武器时将任务设置为忽略，即没有碰撞
	WeapomMesh->SetCollisionEnabled(ECollisionEnabled::NoCollision);//设置无碰撞 

	// 想在服务器上检测当前碰撞区域是否和角色重叠
	// 将碰撞区域设置为SetCollisionResponseToAllChannels(ECollisionResponse::ECR_Ignore)不要碰撞
	// 设置为在所有机上都是无碰撞SetCollisionEnabled(ECollisionEnabled::NoCollision); 
	// 在服务器上设置为启用碰撞 不在构造函数中设置，在游戏开始时BeginPlay()设置
	AreaSphere = CreateDefaultSubobject<USphereComponent>(TEXT("AreaSphere"));
	AreaSphere->SetupAttachment(RootComponent);
	AreaSphere->SetCollisionResponseToAllChannels(ECollisionResponse::ECR_Ignore);
	AreaSphere->SetCollisionEnabled(ECollisionEnabled::NoCollision);
}

// Called when the game starts or when spawned
void AWeapon::BeginPlay()
{
	Super::BeginPlay();
	
	// (GetLocalRole() == ENetRole::ROLE_Authority) == HasAuthority()	作用相同
	//	GetLocalRole() 获得本地角色 ENetRole::ROLE_Authority 是否具有角色权威
	if ( HasAuthority() )
	{ 
		//如果当前是在服务器上，将碰撞设置为查询物理碰撞
		AreaSphere->SetCollisionEnabled(ECollisionEnabled::QueryAndPhysics);
		//设置当前的碰撞是胶囊碰撞ECC_Pawn，并将碰撞设置为重叠ECR_Overlap
		AreaSphere->SetCollisionResponseToChannel(ECollisionChannel::ECC_Pawn,ECollisionResponse::ECR_Overlap);
	}
}


// Called every frame
void AWeapon::Tick(float DeltaTime)
{
	Super::Tick(DeltaTime);

}

2.创建对应的武器类的蓝图