UE5 C++（八）— 创建Actor、添加组件

文章目录

Actor和组件介绍
- Actor
- 组件（Component）
在蓝图中创建Actor，添加组件
在C++中创建Actor，添加组件

Actor和组件介绍

Actor

详细介绍可以去看 Actor和几何体官方文档

还有大钊的这篇文章《InsideUE4》GamePlay架构（一）Actor和Component

所有可以放入关卡的对象都是 Actor，比如摄像机、静态网格体、玩家起始位置。Actor支持三维变换，例如平移、旋转和缩放。你可以通过游戏逻辑代码（C++或蓝图）创建（生成）或销毁Actor。

在C++中，AActor是所有Actor的基类。
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组件（Component）

详细介绍可以去看组件官方文档

还有大钊的这篇文章《InsideUE4》GamePlay架构（一）Actor和Component

组件（Component）是可以添加到Actor上的一项功能。

当你为Actor添加组件后，该Actor便获得了该组件所提供的功能。例如：

聚光灯组件（Spot Light Component）允许你的Actor像聚光灯一样发光，
旋转移动组件（Rotating Movement Component）能使你的Actor四处旋转，
音频组件（Audio Component）将使你的Actor能够播放声音。

组件必须绑定在Actor身上，它们无法单独存在。

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在蓝图中创建Actor，添加组件

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在C++中创建Actor，添加组件

创建一个ActorC++类 — MyCustomActor
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MyCustomActor.h

#pragma once#include "CoreMinimal.h"
// 引入组件
#include "Components/SceneComponent.h"
#include "Components/StaticMeshComponent.h"
#include "Components/BoxComponent.h"
#include "Components/AudioComponent.h"
#include "Particles/ParticleSystemComponent.h"#include "GameFramework/Actor.h"
#include "MyCustomActor.generated.h"UCLASS()
class DEMO_API AMyCustomActor : public AActor
{GENERATED_BODY()public:// Sets default values for this actor's propertiesAMyCustomActor();protected:// Called when the game starts or when spawnedvirtual void BeginPlay() override;public:// Called every framevirtual void Tick(float DeltaTime) override;// 自定义组件UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "MySceneComponent")USceneComponent *SceneComponent;UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "MySceneComponent")UStaticMeshComponent *StaticMeshComponent;UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "MySceneComponent")UBoxComponent *BoxComponent;UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "MySceneComponent")UAudioComponent *AudioComponent;UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "MySceneComponent")UParticleSystemComponent *ParticleSystemComponent;
};

MyCustomActor.cpp


#include "MyCustomActor.h"// Sets default values
AMyCustomActor::AMyCustomActor()
{// 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;// 创建组件SceneComponent = CreateDefaultSubobject<USceneComponent>(TEXT("CustomScene"));StaticMeshComponent = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("CustomStaticMesh"));BoxComponent = CreateDefaultSubobject<UBoxComponent>(TEXT("CustomBox"));AudioComponent = CreateDefaultSubobject<UAudioComponent>(TEXT("CustomAudio"));ParticleSystemComponent = CreateDefaultSubobject<UParticleSystemComponent>(TEXT("CustomParticleSystem"));// 把组件添加到根组件RootComponent = SceneComponent;StaticMeshComponent->SetupAttachment(SceneComponent);BoxComponent->SetupAttachment(SceneComponent);AudioComponent->SetupAttachment(BoxComponent);ParticleSystemComponent->SetupAttachment(SceneComponent);
}// Called when the game starts or when spawned
void AMyCustomActor::BeginPlay()
{Super::BeginPlay();
}// Called every frame
void AMyCustomActor::Tick(float DeltaTime)
{Super::Tick(DeltaTime);
}