UE4:演员在戏中后消失

Question

我使用的是Unreal Engine版本4.25。我创建了一个演员，并将其放置在一个空白模板上。演员在编辑器中是可见的，但一旦按下播放按钮，就不可见了。我正试图用我的代码在圆圈中移动对象。

这是代码：

MyActor.cpp

#include "MyActor.h"
// Sets default values
AMyActor::AMyActor()
{
// 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;
Dimensions = FVector(10, 0, 0);
AxisVector = FVector(1, 0, 0);
Location   = FVector(1, 0, 0);
Multiplier = 50.f;
}
// Called when the game starts or when spawned
void AMyActor::BeginPlay()
{
Super::BeginPlay();
}
// Called every frame
void AMyActor::Tick(float DeltaTime)
{
Super::Tick(DeltaTime);

// Updates the angle of the object
AngleAxis += DeltaTime * Multiplier;
if (AngleAxis >= 360.0f)
{
AngleAxis = 0;
}
//Rotates around axis
FVector RotateValue = Dimensions.RotateAngleAxis(AngleAxis, AxisVector);
Location.X += RotateValue.X;
Location.Y += RotateValue.Y;
Location.Z += RotateValue.Z;
SetActorLocation(Location, false, 0, ETeleportType::None);
}

MyActor.h

#pragma once
#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "MyActor.generated.h"
UCLASS()
class ROBOTEURS_API AMyActor : public AActor
{
GENERATED_BODY()
public: 
// Sets default values for this actor's properties
AMyActor();
protected:
// Called when the game starts or when spawned
virtual void BeginPlay() override;
public: 
// Called every frame
virtual void Tick(float DeltaTime) override;
// declare our float variables
UPROPERTY(EditAnywhere, Category = Movement)
float AngleAxis;
UPROPERTY(EditAnywhere, Category = Movement)
FVector Dimensions;
UPROPERTY(EditAnywhere, Category = Movement)
FVector AxisVector;
UPROPERTY(EditAnywhere, Category = Movement)
FVector Location;
UPROPERTY(EditAnywhere, Category = Movement)
float Multiplier;
};

可能出了什么问题？

Answer 1

这修复了它，我没有创建网格：https://www.youtube.com/watch?v=30XEdBoPw6c

我添加了以下内容：

.cpp

AMyActor::AMyActor()
{
...
Root = CreateDefaultSubobject<USceneComponent>(TEXT("Root"));
RootComponent = Root;
Mesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("Mesh"));
Mesh->AttachTo(Root);
...
}

.h

public: 
...
UPROPERTY()
USceneComponent* Root;
UPROPERTY(EditAnywhere)
UStaticMeshComponent* Mesh;
...