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1.物体上下起伏并旋转
1.1第一种写法
创建一个继承于Actor的类#xff0c;并为新的Actor命名为FloatingActor#xff0c;然后点击Create Class
重新…官方文档虚幻引擎C编程教程 | 虚幻引擎 5.5 文档 | Epic Developer Community | Epic Developer Community
1.物体上下起伏并旋转
1.1第一种写法
创建一个继承于Actor的类并为新的Actor命名为FloatingActor然后点击Create Class
重新加载代码文件
在Games-(用户自定义工程文件名)-Source-FloatingActor.h
在头文件添加代码
public: // 设置构造默认函数AFloatingActor();UPROPERTY(VisibleAnywhere)
//使用继承于UObject的指针UStaticMeshComponent*UStaticMeshComponent* VisualMesh;
在源文件
//设置默认值
AFloatingActor::AFloatingActor()
{//将设置为每帧调用Tick。如果你不需要它你可以关闭它来提高性能。PrimaryActorTick.bCanEverTick true;//创建Object可在蓝图details查看VisualMesh CreateDefaultSubobjectUStaticMeshComponent(TEXT(Mesh));VisualMesh-SetupAttachment(RootComponent);//根组件//根组件另一种写法RootComponent VisualMesh;//不推荐此写法//静态网格体Copy Reference/Script/Engine.StaticMesh/Game/StarterContent/Shapes/Shape_Cone.Shape_Conestatic ConstructorHelpers::FObjectFinderUStaticMesh CubeVisualAsset(TEXT(/Game/StarterContent/Shapes/Shape_Cone.Shape_Cone));//判断是否初始化成功if (CubeVisualAsset.Succeeded()){VisualMesh-SetStaticMesh(CubeVisualAsset.Object);VisualMesh-SetRelativeLocation(FVector(0.0f, 0.0f, 0.0f));}
}void AFloatingActor::BeginPlay()
{Super::BeginPlay();//注意BeginPlay一定要调用Super::BeginPlay()
}//调用每一帧
void AFloatingActor::Tick(float DeltaTime)
{Super::Tick(DeltaTime);//初始化FVector NewLocation GetActorLocation();FRotator NewRotation GetActorRotation();float RunningTime GetGameTimeSinceCreation();//得到在世界的时间从创建开始float DeltaHeight (FMath::Sin(RunningTime DeltaTime) - FMath::Sin(RunningTime)); //设置高度变化呈现正弦曲线变化float DeltaRotation DeltaTime * 20.0f; //Rotate by 20 degrees per second旋转变化 NewLocation.Z DeltaHeight * 20.0f; //高度变化系数放大20倍NewRotation.Yaw DeltaRotation;SetActorLocationAndRotation(NewLocation, NewRotation);
}思路在默认构造函数初始化网格体运用引擎内置函数SetStaticMesh和SetRelativeLocation。在Tick时间函数内先初始化状态信息并运用数学函数改变状态数值最后用SetActorLocationAndRotation函数实现Actor位置变化。
1.2第二种写法初始化网格体
在上述头文件添加新的代码
public:UPROPERTY(BlueprintReadWrite, EditAnywhere, Category Name)UStaticMesh* NewMesh;UPROPERTY(BlueprintReadWrite, EditAnywhere, Category FloatingActor)float FloatSpeed 20.0f;UPROPERTY(BlueprintReadWrite, EditAnywhere, Category FloatingActor)float RotationSpeed 20.0f;
此写法是运用宏从而在蓝图进行快速修改 从而不需要前一种方法默认构造函数的指定网格体的写法 //静态网格体Copy Reference/Script/Engine.StaticMesh/Game/StarterContent/Shapes/Shape_Cone.Shape_Conestatic ConstructorHelpers::FObjectFinderUStaticMesh CubeVisualAsset(TEXT(/Game/StarterContent/Shapes/Shape_Cone.Shape_Cone));
在源文件的BeginPlay()函数处代码
void AFloatingActor::BeginPlay()
{Super::BeginPlay();//注意BeginPlay一定要调用Super::BeginPlay()//将原默认构造函数的判断放在这里if (NewMesh){VisualMesh-SetStaticMesh(NewMesh);VisualMesh-SetRelativeLocation(FVector(0.0f, 0.0f, 0.0f));}
}
