首先基于ActorComponent创建一个组件 HealthComponent,将需要的变量与函数创建
#include "CoreMinimal.h" #include "Components/ActorComponent.h" #include "HealthComponent.generated.h" UCLASS( ClassGroup=(Custom), meta=(BlueprintSpawnableComponent) ) class PVETPC_API UHealthComponent : public UActorComponent { GENERATED_BODY() public: // Sets default values for this component's properties UHealthComponent(); // 初始化健康值 UFUNCTION(BlueprintCallable) void Init(int taotalHealth,int currentHealth); // 造成伤害 UFUNCTION(BlueprintCallable) void HanldTakeAnyDamaged(AActor* DamagedActor, float Damage, const class UDamageType* DamageType, class AController* InstigatedBy, AActor* DamageCauser); // 恢复健康值 UFUNCTION(BlueprintCallable) void RestoreHealth(int restoreValue); UFUNCTION(BlueprintPure) float GetHealth() { return CurrentHealth; } protected: // 总健康值 float TotalHealth; // 当前健康值 float CurrentHealth; // Called when the game starts virtual void BeginPlay() override; public: // Called every frame virtual void TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction) override; };
这里的 HanldTakeAnyDamaged 函数是通过代理绑定到拥有者身上
HanldTakeAnyDamaged 需要的形参需要与 OnTakeAnyDamage 的宏定义一致
除此之外还有OnTakePointDamage 和 OnTakeRadialDamage 也是一样的操作
#include "Components/HealthComponent.h" #include "Engine.h" #include "Kismet/KismetSystemLibrary.h" // Sets default values for this component's properties UHealthComponent::UHealthComponent() { // 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; // ... } void UHealthComponent::Init(int taotalHealth, int currentHealth) { TotalHealth = taotalHealth; CurrentHealth = currentHealth; } void UHealthComponent::HanldTakeAnyDamaged(AActor* DamagedActor, float Damage, const class UDamageType* DamageType, class AController* InstigatedBy, AActor* DamageCauser) { if (Damage <= 0) { return; } CurrentHealth = FMath::Clamp( CurrentHealth - Damage , 0.f, TotalHealth); UE_LOG(LogTemp, Warning, TEXT("I am Demaged! CurrentHealth = %f"), CurrentHealth); } void UHealthComponent::RestoreHealth(int restoreValue) { CurrentHealth = FMath::Clamp(CurrentHealth + restoreValue, 0.f, TotalHealth); GEngine->AddOnScreenDebugMessage(-1, 20, FColor::Red, FString(TEXT("I am RestoreHealth!"))); } // Called when the game starts void UHealthComponent::BeginPlay() { Super::BeginPlay(); // 获取拥有者 AActor* MyOwner = GetOwner(); // 如果存在就将伤害接收函数绑定 if (MyOwner) { UE_LOG(LogTemp, Warning, TEXT("I am bound!")); MyOwner->OnTakeAnyDamage.AddDynamic(this, &UHealthComponent::HanldTakeAnyDamaged); } Init(100,100); // ... } // Called every frame void UHealthComponent::TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction) { Super::TickComponent(DeltaTime, TickType, ThisTickFunction); // ... }
这时候我们将该组件挂载在角色身上,已经有了效果,但是角色不知道组件生命值是否改变
接着我们在组件头文件的头文件申明下添加代理的宏定义,并创建一个代理对象
并在需要响应的函数中添加广播
#include "CoreMinimal.h" #include "Components/ActorComponent.h" #include "HealthComponent.generated.h" // 自定义六参数代理事件 DECLARE_DYNAMIC_MULTICAST_DELEGATE_SixParams(FOnHealthChangedSignature, UHealthComponent*, HealthComp, float, Health, float, HealthDelta, const class UDamageType*, DamageType, class AController*, InstigatedBy, AActor*, DamageCauser); ...... // 恢复健康值 UFUNCTION(BlueprintCallable) void RestoreHealth(int restoreValue); UFUNCTION(BlueprintPure) float GetHealth() { return CurrentHealth; } // 定义代理 UPROPERTY(BlueprintAssignable, Category = "Events") FOnHealthChangedSignature OnHealthChanged; ......
void UHealthComponent::HanldTakeAnyDamaged(AActor* DamagedActor, float Damage, const class UDamageType* DamageType, class AController* InstigatedBy, AActor* DamageCauser) { if (Damage <= 0) { return; } CurrentHealth = FMath::Clamp( CurrentHealth - Damage , 0.f, TotalHealth); UE_LOG(LogTemp, Warning, TEXT("I am Demaged! CurrentHealth = %f"), CurrentHealth); // 每当该函数被调用时,就将调用一次代理函数 OnHealthChanged.Broadcast(this, CurrentHealth, Damage, DamageType, InstigatedBy, DamageCauser); }
最后再到拥有者类中添加一个用于回调的操作函数,其中形参对应在生命组件中定义的那样(注意命名是否重复)
头文件
// 代理事件 UFUNCTION() void OnHealthChanged(UHealthComponent* OnwerHealthComp, float Health, float HealthDelta, const class UDamageType* DamageType, class AController* InstigatedBy, AActor* DamageCauser);
cpp文件
void APCharacter::OnHealthChanged(UHealthComponent* OnwerHealthComp, float Health, float HealthDelta, const class UDamageType* DamageType, class AController* InstigatedBy, AActor* DamageCauser) { if (IsDeath) return; UE_LOG(LogTemp, Warning, TEXT("I know I was hurt! ")); if (Health <= 0 && !IsDeath) { UE_LOG(LogTemp, Warning, TEXT("I am Death! ")); IsDeath = true;
Death(); GetMovementComponent()->StopMovementImmediately(); GetCapsuleComponent()->SetCollisionEnabled(ECollisionEnabled::NoCollision); // 分离控制器 DetachFromControllerPendingDestroy(); // 3秒后执行 SetLifeSpan(3.0f);
} } void APCharacter::BeginPlay() { Super::BeginPlay(); HealthComp->OnHealthChanged.AddDynamic(this, &APCharacter::OnHealthChanged); }
最后测试,结果无误
标签:void,float,UHealthComponent,代理,UEC,AActor,组件,include,class From: https://www.cnblogs.com/limu-zy/p/16838857.html