Create Extraction Zone

添加C++类，名称为FPSExtractionZone

添加盒体组件，进行公开处理，并设置为随处可见

    UPROPERTY(VisibleAnywhere,Category="Components")
    UBoxComponent* OverlapComp;

在Cpp文件中添加头文件

#include "Components/BoxComponent.h"

对刚才定义的组件进行实例化

    OverlapComp = CreateDefaultSubobject<UBoxComponent>(TEXT("OverlapComp"));//创建默认子对象并为它命名
    OverlapComp->SetCollisionEnabled(ECollisionEnabled::QueryOnly);//设置碰撞为启动，类型为只发出查询
    OverlapComp->SetCollisionResponseToAllChannels(ECR_Ignore);//设置碰撞为响应所有通道，设置为忽略
    OverlapComp->SetCollisionResponseToChannel(ECC_Pawn, ECR_Overlap);//设置碰撞为响应指定通道，仅选择人形体进行设置
    OverlapComp->SetBoxExtent(FVector(200.0f));//设置响应范围，XYZ轴均为200个单位长度

设置根组件

    RootComponent = OverlapComp;

绑定到OnComponentBeginOverlap

verlapComp->OnComponentBeginOverlap.AddDynamic(this, &AFPSExtractionZone::HandleOverlap);

按Alt+G进入内部

再按Alt+G

复制后面的参数

声明函数，并标记为UFUNCTION

    UFUNCTION()
    void HandleOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent*  OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult);

输出日志：

UE_LOG(LogTemp, Log, TEXT("Overlap"));

将OverlapComp设置为游戏中的隐藏项

    OverlapComp->SetHiddenInGame(false);