UE4 C++学习笔记之拾取物品

任务：以Item类为父类，创建Weapon类，玩家在场景中可拾取该武器

第一步、角色骨骼添加武器插槽

第二步、编写Weapon类相关代码

Weapon.h代码如下：

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

#pragma once

#include "CoreMinimal.h"
#include "Item.h"
#include "Weapon.generated.h"


UCLASS()
class LEARNTEST_API AWeapon : public AItem
{
	GENERATED_BODY()

public:
	AWeapon();

        //声明骨骼网格体组件
	UPROPERTY(EditAnywhere, BlueprintReadOnly)
	class USkeletalMeshComponent* WeaponMesh;

        //重写重叠函数
	virtual void OnOverlapBegin(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult) override;
	
        //声明拾取函数
	void Equip(class AMan* Picker);
};

Weapon.cpp代码如下：

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


#include "Weapon.h"
#include "Man.h"
#include "Components\StaticMeshComponent.h"
#include "Particles\ParticleSystemComponent.h"
#include "Sound\SoundCue.h"
#include "Components\SkeletalMeshComponent.h"
#include "Components\SphereComponent.h"

AWeapon::AWeapon()
{
    //创建骨骼网格体组件，并将其附着在父类的StaticMesh上
	WeaponMesh = CreateDefaultSubobject<USkeletalMeshComponent>(TEXT("WeaponMesh"));
	WeaponMesh->SetupAttachment(StaticMesh);
}

//重写OnOverlapBegin方法
void AWeapon::OnOverlapBegin(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult)
{
    //调用Item父类方法（这里注意需要将之前Item的实现中Destory()那一行删掉，因为装备武器并不需要删除自身）
	Super::OnOverlapBegin(OverlappedComponent, OtherActor, OtherComp, OtherBodyIndex, bFromSweep, SweepResult);
	if (OtherActor)
	{
		//获取重叠的角色并装备武器
        AMan* Picker = Cast<AMan>(OtherActor);
		if (Picker)
		{
			Equip(Picker);
		}
	}
}

void AWeapon::Equip(AMan* Picker)
{
	if (Picker)
	{
        //关闭碰撞检测和物理模拟
        WeaponMesh->SetCollisionResponseToAllChannels(ECR_Ignore);
		WeaponMesh->SetSimulatePhysics(false);

        //关闭粒子特效
		ParticleComp->SetActive(false);
        
        //接触碰撞重叠函数绑定
		Sphere->OnComponentBeginOverlap.RemoveDynamic(this, &AItem::OnOverlapBegin);

        //自身附着在角色骨骼"weapon_r"插槽
		AttachToComponent(Picker->GetMesh(), FAttachmentTransformRules::SnapToTargetNotIncludingScale, "weapon_r");
	}
}

第三步、以Weapon类为基类，创建蓝图类MyWeapon，在蓝图类中编辑相关的网格体和特效，就可以拖到场景中使用了。

UE4 C++学习笔记之拾取物品

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