#pragma once#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "FloatingPlatform.generated.h"UCLASS()
class FIRSTPROJECT_API AFloatingPlatform : public AActor
{GENERATED_BODY()public:    // Sets default values for this actor's propertiesAFloatingPlatform();// Mesh for the platformUPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="Platform")UStaticMeshComponent* Mesh;UPROPERTY(EditAnywhere)FVector StartPoint;//将EndPoint显示在编辑窗口UPROPERTY(EditAnywhere, meta = (MakeEditWidget = "true"))FVector EndPoint;UPROPERTY(EditAnywhere, BlueprintReadOnly, Category="Platform")float InterpSpeed;UPROPERTY(EditAnywhere, BlueprintReadOnly, Category="Platform")float InterpTime;// 用来控制浮动平台的往返UPROPERTY(EditAnywhere, BlueprintReadOnly, Category="Platform")FTimerHandle InterpTimer;// 判断是否在插值bool bInterping;float Distance;protected:// Called when the game starts or when spawnedvirtual void BeginPlay() override;public: // Called every framevirtual void Tick(float DeltaTime) override;void ToggleInterping();void SwapVectors(FVector& VecOne, FVector& VecTwo);};

#include "FloatingPlatform.h"
#include "TimerManager.h"// Sets default values
AFloatingPlatform::AFloatingPlatform()
{// 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;Mesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("Mesh"));RootComponent = Mesh;StartPoint = FVector(0.f);EndPoint = FVector(0.f);bInterping = false;InterpSpeed = 4.f;InterpTime = 1.f;
}// Called when the game starts or when spawned
void AFloatingPlatform::BeginPlay()
{Super::BeginPlay();//将平台起始位置赋给StartPointStartPoint = GetActorLocation();EndPoint += StartPoint;bInterping = false;GetWorldTimerManager().SetTimer(InterpTimer, this, &AFloatingPlatform::ToggleInterping, InterpTime);Distance = (EndPoint - StartPoint).Size();
}// Called every frame
void AFloatingPlatform::Tick(float DeltaTime)
{Super::Tick(DeltaTime);if(bInterping){FVector CurrentLocation = GetActorLocation();// 插值FVector Interp = FMath::VInterpTo(CurrentLocation, EndPoint, DeltaTime, InterpSpeed);SetActorLocation(Interp);float DistanceTraveled = (GetActorLocation() - StartPoint).Size();if(Distance - DistanceTraveled <= 1.f){ToggleInterping();GetWorldTimerManager().SetTimer(InterpTimer, this, &AFloatingPlatform::ToggleInterping, InterpTime);// 交换起点和终点，使其返回SwapVectors(StartPoint, EndPoint);}}}void AFloatingPlatform::ToggleInterping()
{bInterping = !bInterping;
}void AFloatingPlatform::SwapVectors(FVector& VecOne, FVector& VecTwo)
{FVector Temp = VecOne;VecOne = VecTwo;VecTwo = Temp;
}