• 20uec++多人游戏【小球与玩家互动】

    为小球添加生命值组件和伤害处理函数

    1. //生命值组件
    2. 	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Components")
    3. 	class USHealthComponent * HealthComp;
    4.  
    5. 	//伤害处理函数
    6. 	UFUNCTION()
    7. 	void HandleTakeAnyDamage(USHealthComponent * OwnerHealthComp, float Health, float HealthDelta, const UDamageType * DamageType, AController * InstigatedBy, AActor * DamageCauser);

    创建组件并定义函数

    HealthComp = CreateDefaultSubobject(TEXT("HealthComp"));
    1. void AASTrackerBot::HandleTakeAnyDamage(USHealthComponent * OwnerHealthComp, float Health, float HealthDelta, const UDamageType * DamageType, AController * InstigatedBy, AActor * DamageCauser)
    2. {
    3. 	
    4. 	UKismetSystemLibrary::PrintString(this, FString::SanitizeFloat(HealthComp->Health));
    5.  
    6. }

    添加与爆炸相关的成员变量和函数

    1. 	//自爆函数
    2. 	void SelfDestruct();
    3.  
    4. 	//爆炸特效
    5. 	UPROPERTY(EditDefaultsOnly, Category = "TracerBot")
    6. 	class UParticleSystem * ExplorEffect;
    7.  
    8. 	//是否已经爆炸
    9. 	bool bExplored;
    10.  
    11. 	//爆炸半径
    12. 	UPROPERTY(EditDefaultsOnly, Category = "TracerBot")
    13. 	float ExplorRadius;
    14.  
    15. 	//爆炸伤害
    16. 	UPROPERTY(EditDefaultsOnly, Category = "TracerBot")
    17. 	float ExplorDamage;

    在构造函数中初始化一下

    1. 	bExplored = false;
    2. 	ExplorRadius = 200;
    3. 	ExplorDamage = 100;

    定义自爆函数

    1. void AASTrackerBot::SelfDestruct()
    2. {
    3. 	//检查是否已经爆炸了
    4. 	if (bExplored)
    5. 	{
    6. 		return;
    7. 	}
    8. 	bExplored = true;
    9. 	//发生爆炸
    10. 	UGameplayStatics::SpawnEmitterAtLocation(GetWorld(), ExplorEffect, GetActorLocation());
    11. 	//设置要忽略的actor
    12. 	TArray IgnoredActors;
    13. 	IgnoredActors.Add(this);
    14.  
    15. 	//对自身进行伤害
    16. 	UGameplayStatics::ApplyRadialDamage(this, ExplorDamage, GetActorLocation(), ExplorRadius, nullptr, IgnoredActors, this, GetInstigatorController(), true);
    17.  
    18. 	//画出伤害范围
    19. 	DrawDebugSphere(GetWorld(), GetActorLocation(), ExplorRadius, 12, FColor::Green, false, 2.0f, 0, 1.0f);
    20. 	//自毁
    21. 	Destroy();
    22. }

    在伤害处理中，调用该函数

    1. void AASTrackerBot::HandleTakeAnyDamage(USHealthComponent * OwnerHealthComp, float Health, float HealthDelta, const UDamageType * DamageType, AController * InstigatedBy, AActor * DamageCauser)
    2. {
    3. 	
    4. 	UKismetSystemLibrary::PrintString(this, FString::SanitizeFloat(HealthComp->Health));
    5. 	if (HealthComp->Health <= 0)
    6. 	{
    7. 		SelfDestruct();
    8. 	}
    9. }

    ===========================================

    现在实现靠近玩家定时自爆功能

    创建相关的变量和函数

    1. 	//球形碰撞组件
    2. 	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Components")
    3. 	class USphereComponent* CollisionComponent;
    4.  
    5. 	//自爆倒计时句柄
    6. 	FTimerHandle TimerHandle_SelfDamage;
    7.  
    8. 	//倒计时自爆函数
    9. 	void DamageSelf();
    10.  
    11. 	//是否已经开始自毁倒计时
    12. 	bool bStartSelfDamge;
    13.  
    14. 	//游戏重叠函数
    15. 	virtual void NotifyActorBeginOverlap(AActor * OtherActor) override;

    在构造函数中创建球形组件，并设置相关参数

    1. 	CollisionComponent = CreateDefaultSubobject(TEXT("SphereComponent"));
    2. 	CollisionComponent->SetSphereRadius(200);
    3. 	CollisionComponent->SetCollisionEnabled(ECollisionEnabled::QueryOnly);
    4. 	CollisionComponent->SetCollisionResponseToAllChannels(ECR_Ignore);
    5. 	CollisionComponent->SetCollisionResponseToChannel(ECC_Pawn, ECR_Overlap);
    6. 	CollisionComponent->SetupAttachment(RootComponent);

    定义倒计时自爆函数

    1. void AASTrackerBot::DamageSelf()
    2. {
    3. 	UGameplayStatics::ApplyDamage(this, 20, GetInstigatorController(), this, nullptr);
    4. }

    定义重叠函数

    1. void AASTrackerBot::NotifyActorBeginOverlap(AActor * OtherActor)
    2. {
    3. 	if (!bStartSelfDamge)
    4. 	{
    5. 		ASCharacter * PlayerPawn = Cast(OtherActor);
    6. 		if (PlayerPawn)
    7. 		{
    8. 			GetWorld()->GetTimerManager().SetTimer(TimerHandle_SelfDamage, this, &AASTrackerBot::DamageSelf, 0.5f, true , 0.0f);
    9. 			bStartSelfDamge = true;
    10. 		}
    11. 	}
    12. }

    编译，然后打开小球的蓝图，选择特效

    编译，测试，发现小球不会爆炸。

    将构造函数的事件绑定函数放到游戏开始函数。就可以了

    1. // Called when the game starts or when spawned
    2. void AASTrackerBot::BeginPlay()
    3. {
    4. 	Super::BeginPlay();
    5. 	NextPathPoint = GetNextPathPoint();
    6. 	//伤害事件绑定函数
    7. 	HealthComp->OnHealthChanged.AddDynamic(this, &AASTrackerBot::HandleTakeAnyDamage);
    8. }

     我也不知道为啥。

    同时也可以炸死人。

    ========================================

    现在我们为小球完善一下材质

     按住T，点击鼠标左键

    然后选择一个材质

     

    按U，然后点击鼠标左键

     

    将这两个设成4

     

    这样可以让材质变得密集 

     

    按住M，然后点击鼠标左键，得到乘节点，然后连线

     

    按住1，然后点击鼠标左键，生成常数节点，然后连接到自发光上面

     这是将值设为0.5的效果

    添加一个Time节点

     

     

    然后按住s，点击鼠标左键，生成参数节点 

     我们用（时间-参数）*4，然后约束一下乘积。

     然后1-上述结果

    然后再得到一个指数

    然后将其赋予到自发光上面

     回到小球类，我们添加一个小球材质的变量

    1. 	//动态材质
    2. 	class UMaterialInstanceDynamic * MatInst;
    #include "Materials/MaterialInstanceDynamic.h"

    完善伤害处理函数

    1. void AASTrackerBot::HandleTakeAnyDamage(USHealthComponent * OwnerHealthComp, float Health, float HealthDelta, const UDamageType * DamageType, AController * InstigatedBy, AActor * DamageCauser)
    2. {
    3. 	//UKismetSystemLibrary::PrintString(this, FString::SanitizeFloat(HealthComp->Health));
    4.  
    5. 	//得到MeshComponent组件的材质
    6. 	if (MatInst == nullptr)
    7. 	{
    8. 		MatInst = MeshComponent->CreateAndSetMaterialInstanceDynamicFromMaterial(0, MeshComponent->GetMaterial(0));
    9. 		UKismetSystemLibrary::PrintString(this, FString::SanitizeFloat(HealthComp->Health));
    10. 	}
    11. 	//将参数设为当前时间，让材质发光
    12. 	if (MatInst)
    13. 	{
    14. 		MatInst->SetScalarParameterValue("LastTimeDamageTaken", GetWorld()->TimeSeconds);
    15. 	}
    16. 	//自爆
    17. 	if (HealthComp->Health <= 0)
    18. 	{
    19. 		
    20. 		SelfDestruct();
    21. 	}
    22. }

    ==========================================

    现在加一下声音特效

    添加两个成员变量

    1. 	//自爆中声音特效
    2. 	UPROPERTY(EditDefaultsOnly, Category = "TracerBot")
    3. 	class USoundCue * SelfDestructSound;
    4.  
    5. 	//爆炸特效
    6. 	UPROPERTY(EditDefaultsOnly, Category = "TracerBot")
    7. 	class USoundCue * ExploedSound;
    #include "Sound/SoundCue.h"

    更新一下SelfDestruct函数和NotifyActorBeginOverlap函数

    1. void AASTrackerBot::SelfDestruct()
    2. {
    3. 	//检查是否已经爆炸了
    4. 	if (bExplored)
    5. 	{
    6. 		return;
    7. 	}
    8. 	bExplored = true;
    9. 	//发生爆炸
    10. 	UGameplayStatics::SpawnEmitterAtLocation(GetWorld(), ExplorEffect, GetActorLocation());
    11. 	//设置要忽略的actor
    12. 	TArray IgnoredActors;
    13. 	IgnoredActors.Add(this);
    14. //	UKismetSystemLibrary::PrintString(this, FString::SanitizeFloat(222.0f));
    15.  
    16. 	//对自身进行伤害
    17. 	UGameplayStatics::ApplyRadialDamage(this, ExplorDamage, GetActorLocation(), ExplorRadius, nullptr, IgnoredActors, this, GetInstigatorController(), true);
    18.  
    19. 	//画出伤害范围
    20. 	DrawDebugSphere(GetWorld(), GetActorLocation(), ExplorRadius, 12, FColor::Green, false, 2.0f, 0, 1.0f);
    21. 	//发生爆炸声,在actor的位置
    22. 	UGameplayStatics::PlaySoundAtLocation(this, ExploedSound, GetActorLocation());
    23. 	//自毁
    24. 	Destroy();
    25. }
    1. void AASTrackerBot::NotifyActorBeginOverlap(AActor * OtherActor)
    2. {
    3. 	if (!bStartSelfDamge)
    4. 	{
    5. 		ASCharacter * PlayerPawn = Cast(OtherActor);
    6. 		if (PlayerPawn)
    7. 		{
    8. 			GetWorld()->GetTimerManager().SetTimer(TimerHandle_SelfDamage, this, &AASTrackerBot::DamageSelf, 0.5f, true , 0.0f);
    9. 			bStartSelfDamge = true;
    10. 		}
    11.  
    12. 		//将自爆警告声音绑定到根组件
    13. 		UGameplayStatics::SpawnSoundAttached(SelfDestructSound, RootComponent);
    14. 	}
    15. }

    删掉这些成品，我们自己做一个

    创建cue， cue实际上就是声音文件的子类

     

     

    设置声音衰减

     

    我们还可以做一个音效衰减

     

    创建之后打开，设为自然音

    这里选择衰减 

     

     

    在蓝图中选择声音

     

    然后添加一个声音组件，选择滚动声效

     

     

     编译测试成功  

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  • 原文地址：https://blog.csdn.net/zhang2362167998/article/details/128097328