1. 新建第三人称c++游戏（其它模板开局也可以的）

2. 新建继承自Actor的c++类

3. 添加静态网格体成员SM_MyActor，并在构造函数中进行相应的初始化

UCLASS()
class MYPROJECT9S_API AMyActor : public AActor
{
  GENERATED_BODY()
protected:
  /** Please add a variable description */
  UPROPERTY(BlueprintReadOnly, VisibleAnywhere, Category="Default")
  TObjectPtr<UStaticMeshComponent> SM_MyActor;

// 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;

  SM_MyActor = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("StaticMeshComponent"));
  RootComponent = SM_MyActor;

  // 加载静态网格资源
  static ConstructorHelpers::FObjectFinder<UStaticMesh> StaticMeshAsset(TEXT("/Game/LevelProtoTyping/Meshes/SM_ChamferCube"));
  if (StaticMeshAsset.Succeeded())
  {
      SM_MyActor->SetStaticMesh(StaticMeshAsset.Object);
  }

  // 设置纹理
  static ConstructorHelpers::FObjectFinder<UMaterialInterface> MaterialAsset(TEXT("/Game/LevelProtoTyping/Materials/MI_Solid_Blue"));
  if (MaterialAsset.Succeeded())
  {
      UMaterialInterface* Material = MaterialAsset.Object;
      SM_MyActor->SetMaterial(0, Material);
  }
}

4. BeginPlay或者Construction中初始化也是可以的

// 构造脚本函数实现
void AMyActor::OnConstruction(const FTransform& Transform)
{
  // 在这里可以添加你的构造脚本代码逻辑
  FString Message = TEXT("Hello World from AMyActor::OnConstruction c++!");

  // 输出日志到屏幕
  if (GEngine)
  {
      GEngine->AddOnScreenDebugMessage(-1, 5.0f, FColor::Yellow, Message);
  }

  // 输出日志到控制台
  UE_LOG(LogTemp, Warning, TEXT("%s"), *Message);
}