<转载> UE4的Actor类C++简单尝试

#pragma once
#include "GameFramework/Actor.h"
#include "MyActor.generated.h"
UCLASS()
class EMPTY_API AMyActor : public AActor
{
    GENERATED_BODY()

public:
    //运行时间
    float RunningTime;
    //构造器
    AMyActor();
    //开始时执行的回调 相当于Unity里面的 void Start()
    virtual void BeginPlay() override;

    //每一帧执行的回调 相当于Unity里面的 void Update()
    virtual void Tick( float DeltaSeconds ) override;
};
#include "empty.h"
#include "MyActor.h"
#include "iostream"
//构造器
AMyActor::AMyActor()
{
    //设置每一帧执行一次Tick() ，如果不需要就设为false
    PrimaryActorTick.bCanEverTick = true;
}
//开始时执行的回调
void AMyActor::BeginPlay()
{
    Super::BeginPlay();

    std::cout << "开始执行";
}
//每一帧执行的回调
void AMyActor::Tick( float DeltaTime )
{
    std::cout << "每一帧执行";
    Super::Tick( DeltaTime );
    //获取Actor的位置 保存到NewLocation变量
    FVector NewLocation = GetActorLocation();
    //获取时间差值
    float DeltaHeight = (FMath::Sin(RunningTime + DeltaTime) - FMath::Sin(RunningTime));
    //改变的高度，每次递增20.0f
    NewLocation.Z += DeltaHeight * 20.0f;
    //改变运行时间的值
    RunningTime += DeltaTime;
    //设置当前Actor的位置
    SetActorLocation(NewLocation);
}