[언리얼엔진] C++로 움직이는(왕복) 물체 만들기

속도가 아무리 빨라도 왕복운동은 유지된다. 성공적...

 

 

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"
#include "Engine/StaticMeshActor.h"
#include "MyMovingPlatform__A.generated.h"

/**
 * 
 */
UCLASS()
class PUZZLEPLATFORMS_API AMyMovingPlatform__A : public AStaticMeshActor
{
	GENERATED_BODY()

public:

protected:

private:
	AMyMovingPlatform__A();

	virtual void BeginPlay() override;
	virtual void Tick(float DeltaTime) override;

	//디테일 창에서 에딧이 가능하게
	UPROPERTY(EditAnywhere)
		float MoveSpeed = 20;

	//기즈모 추가
	UPROPERTY(EditAnywhere, Meta = (MakeEditWidget = true))
		FVector TargetLocation;

	//자신의 위치와 타겟 위치를 담음
	FVector GlobalStartLocation, GlobalTargetLocation;

	//나가야 할 방향
	FVector Direction;

	//시작 <-> 목적지까지의 거리?
	float TravelLength;
};

 

// Fill out your copyright notice in the Description page of Project Settings.


#include "MyMovingPlatform__A.h"

AMyMovingPlatform__A::AMyMovingPlatform__A()
{
	PrimaryActorTick.bCanEverTick = true;
}

void AMyMovingPlatform__A::BeginPlay()
{

	Super::BeginPlay();

	//액터를 무버블로 설정한다
	SetMobility(EComponentMobility::Movable);	


	if (HasAuthority())
	{
		SetReplicates(true);
		SetReplicateMovement(true);
	}

	//시작 위치는 자신의 위치
	this->GlobalStartLocation = GetActorLocation();

	//도착 지점은 기즈모(타겟 로케이션)의 위치
	this->GlobalTargetLocation = GetTransform().TransformPosition(TargetLocation);

	//방향은 타겟 - 자신위치.. 의 normalized
	this->Direction = (GlobalTargetLocation - GlobalStartLocation).GetSafeNormal();

	//총 이동거리는 타겟 - 초기위치의 길이
	this->TravelLength = (GlobalTargetLocation - GlobalStartLocation).Size();
}

void AMyMovingPlatform__A::Tick(float DeltaTime)
{
	Super::Tick(DeltaTime);

	if (HasAuthority())
	{
		FVector Location = GetActorLocation();

		Location += Direction * DeltaTime * MoveSpeed;

		SetActorLocation(Location);

		float TravelSize = (Location - GlobalStartLocation).Size();

		if (TravelSize > TravelLength)
		{
			Direction *= -1;

			FVector swapTemp = GlobalStartLocation;
			GlobalStartLocation = GlobalTargetLocation;
			GlobalTargetLocation = swapTemp;
		}
	}
}