UE_CPP学习

虚幻编辑器设置

案例1——控制物体的移动

创建一个蓝图

创建一个C++ Class

把脚本挂到蓝图中，并在脚本下面挂上一个静态的Mesh

进IDE编写代码

NewMovement.h

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

#pragma once

#include "CoreMinimal.h"
#include "Components/SceneComponent.h"
#include "NewMovement.generated.h"


UCLASS( ClassGroup=(Custom), meta=(BlueprintSpawnableComponent) )
class MYPROJECT_API UNewMovement : public USceneComponent
{
	GENERATED_BODY()

public:
	// Sets default values for this component's properties
	UNewMovement();

protected:
	// Called when the game starts
	virtual void BeginPlay() override;

public:
	// Called every frame
	virtual void TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction) override;
	// 成员变量
	UPROPERTY(EditAnywhere, Category = "Movement")
	FVector MoveOffset;  // 移动偏移

	UPROPERTY(EditAnywhere, Category = "Movement")
	float Speed = 100.0f;  // 移动速度

	FVector StartLocation;  // 初始位置
	FVector MoveOffsetNormal;   // 归一化后的移动偏移
	float EndDistance;      // 总移动距离
	float CurrentDistance = 0.0f;  // 当前移动的距离
	int32 DirectionMove = 1; 
	
};

NewMovement.cpp

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


#include "NewMovement.h"

// Sets default values for this component's properties
UNewMovement::UNewMovement()
{
// Set this component to be initialized when the game starts, and to be ticked every frame.  You can turn these features
    // off to improve performance if you don't need them.
PrimaryComponentTick.bCanEverTick = true;

// ...
}


// Called when the game starts
void UNewMovement::BeginPlay()
{
Super::BeginPlay();
StartLocation = this->GetRelativeLocation(); 
EndDistance = MoveOffset.Length();
//归一化
MoveOffset.Normalize();
MoveOffsetNormal = MoveOffset;

}


// Called every frame
void UNewMovement::TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction)
{
Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
//设置物体的相对位置
SetRelativeLocation(StartLocation + CurrentDistance * MoveOffsetNormal);
//更新当前的移动距离
CurrentDistance += DeltaTime * Speed * DirectionMove;
//方向反转
if (CurrentDistance >= EndDistance || CurrentDistance <= 0.0f)
    {
DirectionMove *= -1;
    }
}

效果：

Unreal C++基础

01创建和设置Class