完成复活逻辑

Source/PvPDemo/Private/BotCharacter.cpp

@@ -5,9 +5,22 @@
 
 #include "AbilitySystemComponent.h"
 #include "Abilities/GameplayAbility.h"
+#include "Components/CapsuleComponent.h"
 #include "Components/MainAbilitySystemComponent.h"
+#include "Components/SkeletalMeshComponent.h"
+#include "Engine/World.h"
+#include "GameFramework/CharacterMovementComponent.h"
 #include "GameplayEffect.h"
 #include "MainAttributeSet.h"
+#include "TimerManager.h"
+
+namespace
+{
+	FGameplayTag GetDeadTag()
+	{
+		return FGameplayTag::RequestGameplayTag(FName(TEXT("State.Dead")));
+	}
+}
 
 // Sets default values
 ABotCharacter::ABotCharacter()
@@ -30,6 +43,17 @@ void ABotCharacter::BeginPlay()
 	InitAbilityActorInfo();
 }
 
+void ABotCharacter::EndPlay(const EEndPlayReason::Type EndPlayReason)
+{
+	UnbindHealthChangedDelegate();
+	if (UWorld* World = GetWorld())
+	{
+		World->GetTimerManager().ClearTimer(RespawnTimer);
+	}
+
+	Super::EndPlay(EndPlayReason);
+}
+
 void ABotCharacter::PossessedBy(AController* NewController)
 {
 	Super::PossessedBy(NewController);
@@ -63,7 +87,9 @@ void ABotCharacter::InitAbilityActorInfo()
 		return;
 	}
 
+	UnbindHealthChangedDelegate();
 	AbilitySystemComponent->InitAbilityActorInfo(this, this);
+	BindHealthChangedDelegate();
 
 	if (HasAuthority())
 	{
@@ -72,6 +98,39 @@ void ABotCharacter::InitAbilityActorInfo()
 	}
 }
 
+void ABotCharacter::BindHealthChangedDelegate()
+{
+	if (!AbilitySystemComponent || HealthChangedHandle.IsValid())
+	{
+		return;
+	}
+
+	HealthChangedHandle = AbilitySystemComponent
+		->GetGameplayAttributeValueChangeDelegate(UMainAttributeSet::GetHealthAttribute())
+		.AddUObject(this, &ThisClass::OnHealthChanged);
+}
+
+void ABotCharacter::UnbindHealthChangedDelegate()
+{
+	if (!AbilitySystemComponent || !HealthChangedHandle.IsValid())
+	{
+		return;
+	}
+
+	AbilitySystemComponent
+		->GetGameplayAttributeValueChangeDelegate(UMainAttributeSet::GetHealthAttribute())
+		.Remove(HealthChangedHandle);
+	HealthChangedHandle.Reset();
+}
+
+void ABotCharacter::OnHealthChanged(const FOnAttributeChangeData& Data)
+{
+	if (HasAuthority() && Data.NewValue <= 0.f)
+	{
+		HandleDeath();
+	}
+}
+
 void ABotCharacter::GiveDefaultAbilities()
 {
 	if (bHasGivenDefaultAbilities || !AbilitySystemComponent)
@@ -110,3 +169,77 @@ void ABotCharacter::ApplyDefaultAttributeEffect()
 	}
 }
 
+void ABotCharacter::HandleDeath()
+{
+	if (bHasHandledDeath)
+	{
+		return;
+	}
+
+	bHasHandledDeath = true;
+
+	if (AbilitySystemComponent)
+	{
+		AbilitySystemComponent->SetLooseGameplayTagCount(GetDeadTag(), 1, EGameplayTagReplicationState::TagOnly);
+	}
+
+	MulticastHandleDeath();
+
+	if (UWorld* World = GetWorld())
+	{
+		if (RespawnDelay <= 0.f)
+		{
+			HandleRespawn();
+		}
+		else
+		{
+			World->GetTimerManager().SetTimer(RespawnTimer, this, &ThisClass::HandleRespawn, RespawnDelay, false);
+		}
+	}
+}
+
+void ABotCharacter::MulticastHandleDeath_Implementation()
+{
+	if (bHasNotifiedDeath)
+	{
+		return;
+	}
+
+	bHasNotifiedDeath = true;
+
+	GetCharacterMovement()->DisableMovement();
+	GetCapsuleComponent()->SetCollisionEnabled(ECollisionEnabled::NoCollision);
+	GetMesh()->SetHiddenInGame(true, true);
+
+	BP_OnDeath();
+}
+
+void ABotCharacter::HandleRespawn()
+{
+	if (!HasAuthority())
+	{
+		return;
+	}
+
+	if (AbilitySystemComponent)
+	{
+		AbilitySystemComponent->SetLooseGameplayTagCount(GetDeadTag(), 0, EGameplayTagReplicationState::TagOnly);
+
+		const float MaxHealth = AbilitySystemComponent->GetNumericAttribute(UMainAttributeSet::GetMaxHealthAttribute());
+		AbilitySystemComponent->SetNumericAttributeBase(UMainAttributeSet::GetHealthAttribute(), MaxHealth);
+	}
+
+	bHasHandledDeath = false;
+	bHasNotifiedDeath = false;
+
+	MulticastRestoreRespawnState();
+}
+
+void ABotCharacter::MulticastRestoreRespawnState_Implementation()
+{
+	bHasNotifiedDeath = false;
+
+	GetCharacterMovement()->SetMovementMode(MOVE_Walking);
+	GetCapsuleComponent()->SetCollisionEnabled(ECollisionEnabled::QueryAndPhysics);
+	GetMesh()->SetHiddenInGame(false, true);
+}

Source/PvPDemo/Private/MainAttributeSet.cpp

@@ -3,12 +3,21 @@
 
 #include "MainAttributeSet.h"
 
+#include "GameplayEffectExtension.h"
 #include "Net/UnrealNetwork.h"
 
+namespace
+{
+	FGameplayTag GetDeadTag()
+	{
+		return FGameplayTag::RequestGameplayTag(FName(TEXT("State.Dead")));
+	}
+}
+
 UMainAttributeSet::UMainAttributeSet()
 {
-	InitHealth(1000.f);
-	InitMaxHealth(1000.f);
+	InitHealth(50.f);
+	InitMaxHealth(50.f);
 }
 
 void UMainAttributeSet::GetLifetimeReplicatedProps(TArray<class FLifetimeProperty>& OutLifetimeProps) const
@@ -18,6 +27,47 @@ void UMainAttributeSet::GetLifetimeReplicatedProps(TArray<class FLifetimePropert
 	DOREPLIFETIME_CONDITION_NOTIFY(UMainAttributeSet, MaxHealth, COND_None, REPNOTIFY_Always);
 }
 
+void UMainAttributeSet::PreAttributeChange(const FGameplayAttribute& Attribute, float& NewValue)
+{
+	Super::PreAttributeChange(Attribute, NewValue);
+
+	if (Attribute == GetHealthAttribute())
+	{
+		NewValue = FMath::Clamp(NewValue, 0.f, GetMaxHealth());
+	}
+	else if (Attribute == GetMaxHealthAttribute())
+	{
+		NewValue = FMath::Max(NewValue, 0.f);
+	}
+}
+
+void UMainAttributeSet::PostGameplayEffectExecute(const FGameplayEffectModCallbackData& Data)
+{
+	Super::PostGameplayEffectExecute(Data);
+
+	if (Data.EvaluatedData.Attribute == GetHealthAttribute())
+	{
+		SetHealth(FMath::Clamp(GetHealth(), 0.f, GetMaxHealth()));
+
+		if (GetHealth() <= 0.f)
+		{
+			if (UAbilitySystemComponent* ASC = GetOwningAbilitySystemComponent())
+			{
+				AActor* OwningActor = ASC->GetOwnerActor();
+				if (OwningActor && OwningActor->HasAuthority())
+				{
+					ASC->SetLooseGameplayTagCount(GetDeadTag(), 1, EGameplayTagReplicationState::TagOnly);
+				}
+			}
+		}
+	}
+	else if (Data.EvaluatedData.Attribute == GetMaxHealthAttribute())
+	{
+		SetMaxHealth(FMath::Max(GetMaxHealth(), 0.f));
+		SetHealth(FMath::Clamp(GetHealth(), 0.f, GetMaxHealth()));
+	}
+}
+
 void UMainAttributeSet::OnRep_Health(const FGameplayAttributeData& OldHealth) const
 {
 	GAMEPLAYATTRIBUTE_REPNOTIFY(UMainAttributeSet, Health, OldHealth);

Source/PvPDemo/Public/BotCharacter.h

@@ -4,6 +4,7 @@
 
 #include "CoreMinimal.h"
 #include "AbilitySystemInterface.h"
+#include "Engine/TimerHandle.h"
 #include "GameFramework/Character.h"
 #include "BotCharacter.generated.h"
 
@@ -11,6 +12,7 @@ class UAbilitySystemComponent;
 class UAttributeSet;
 class UGameplayAbility;
 class UGameplayEffect;
+struct FOnAttributeChangeData;
 
 UCLASS()
 class PVPDEMO_API ABotCharacter : public ACharacter, public IAbilitySystemInterface
@@ -29,6 +31,7 @@ public:
 protected:
 	// Called when the game starts or when spawned
 	virtual void BeginPlay() override;
+	virtual void EndPlay(const EEndPlayReason::Type EndPlayReason) override;
 
 	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="GAS")
 	TObjectPtr<UAbilitySystemComponent> AbilitySystemComponent;
@@ -42,6 +45,12 @@ protected:
 	UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category="GAS")
 	TSubclassOf<UGameplayEffect> DefaultAttributeEffect;
 
+	UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category="Respawn", meta=(ClampMin="0", Units="s"))
+	float RespawnDelay = 2.f;
+
+	UFUNCTION(BlueprintImplementableEvent, Category="Death")
+	void BP_OnDeath();
+
 public:	
 	// Called every frame
 	virtual void Tick(float DeltaTime) override;
@@ -51,9 +60,24 @@ public:
 
 private:
 	void InitAbilityActorInfo();
+	void BindHealthChangedDelegate();
+	void UnbindHealthChangedDelegate();
+	void OnHealthChanged(const FOnAttributeChangeData& Data);
 	void GiveDefaultAbilities();
 	void ApplyDefaultAttributeEffect();
+	void HandleDeath();
+	void HandleRespawn();
+
+	UFUNCTION(NetMulticast, Reliable)
+	void MulticastHandleDeath();
+
+	UFUNCTION(NetMulticast, Reliable)
+	void MulticastRestoreRespawnState();
 
 	bool bHasGivenDefaultAbilities = false;
 	bool bHasAppliedDefaultAttributeEffect = false;
+	bool bHasHandledDeath = false;
+	bool bHasNotifiedDeath = false;
+	FDelegateHandle HealthChangedHandle;
+	FTimerHandle RespawnTimer;
 };

Source/PvPDemo/Public/MainAttributeSet.h

@@ -18,6 +18,8 @@ public:
 	UMainAttributeSet();
 	
 	virtual void GetLifetimeReplicatedProps(TArray<class FLifetimeProperty>& OutLifetimeProps) const override;
+	virtual void PreAttributeChange(const FGameplayAttribute& Attribute, float& NewValue) override;
+	virtual void PostGameplayEffectExecute(const struct FGameplayEffectModCallbackData& Data) override;
 	
 	UPROPERTY(BlueprintReadOnly, ReplicatedUsing = OnRep_Health)
 	FGameplayAttributeData Health;

Source/PvPDemo/PvPDemoCharacter.cpp

@@ -4,18 +4,30 @@
 #include "Engine/LocalPlayer.h"
 #include "Camera/CameraComponent.h"
 #include "Components/CapsuleComponent.h"
+#include "Components/SkeletalMeshComponent.h"
 #include "GameFramework/CharacterMovementComponent.h"
 #include "GameFramework/SpringArmComponent.h"
 #include "GameFramework/Controller.h"
 #include "EnhancedInputComponent.h"
 #include "EnhancedInputSubsystems.h"
+#include "Engine/World.h"
 #include "InputActionValue.h"
+#include "MainAttributeSet.h"
 #include "MainPlayerState.h"
 #include "PvPDemo.h"
+#include "PvPDemoGameMode.h"
 #include "AbilitySystemComponent.h"
 #include "AttributeSet.h"
 #include "Kismet/KismetSystemLibrary.h"
 
+namespace
+{
+	FGameplayTag GetDeadTag()
+	{
+		return FGameplayTag::RequestGameplayTag(FName(TEXT("State.Dead")));
+	}
+}
+
 
 APvPDemoCharacter::APvPDemoCharacter()
 {
@@ -71,6 +83,13 @@ void APvPDemoCharacter::OnRep_PlayerState()
 	InitAbilityActorInfo();
 }
 
+void APvPDemoCharacter::EndPlay(const EEndPlayReason::Type EndPlayReason)
+{
+	UnbindHealthChangedDelegate();
+
+	Super::EndPlay(EndPlayReason);
+}
+
 void APvPDemoCharacter::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
 {
 	// Set up action bindings
@@ -173,11 +192,14 @@ void APvPDemoCharacter::InitAbilityActorInfo()
 {
 	AMainPlayerState* MainPlayerState = GetPlayerState<AMainPlayerState>();
 	check(MainPlayerState);
+
+	UnbindHealthChangedDelegate();
 	
 	// 设置ASC的所有者，OwnerActor是所有者，AvatarActor是游戏中的形象
 	MainPlayerState->GetAbilitySystemComponent()->InitAbilityActorInfo(MainPlayerState, this);
 	AbilitySystemComponent = MainPlayerState->GetAbilitySystemComponent();
 	AttributeSet = MainPlayerState->GetAttributeSet();
+	BindHealthChangedDelegate();
 	
 	if (HasAuthority() && AbilitySystemComponent && HeldItem)
 	{
@@ -187,6 +209,97 @@ void APvPDemoCharacter::InitAbilityActorInfo()
 	}
 }
 
+void APvPDemoCharacter::BindHealthChangedDelegate()
+{
+	if (!AbilitySystemComponent || HealthChangedHandle.IsValid())
+	{
+		return;
+	}
+
+	HealthChangedHandle = AbilitySystemComponent
+		->GetGameplayAttributeValueChangeDelegate(UMainAttributeSet::GetHealthAttribute())
+		.AddUObject(this, &ThisClass::OnHealthChanged);
+}
+
+void APvPDemoCharacter::UnbindHealthChangedDelegate()
+{
+	if (!AbilitySystemComponent || !HealthChangedHandle.IsValid())
+	{
+		return;
+	}
+
+	AbilitySystemComponent
+		->GetGameplayAttributeValueChangeDelegate(UMainAttributeSet::GetHealthAttribute())
+		.Remove(HealthChangedHandle);
+	HealthChangedHandle.Reset();
+}
+
+void APvPDemoCharacter::OnHealthChanged(const FOnAttributeChangeData& Data)
+{
+	if (HasAuthority() && Data.NewValue <= 0.f)
+	{
+		HandleDeath();
+	}
+}
+
+void APvPDemoCharacter::HandleDeath()
+{
+	if (bHasHandledDeath)
+	{
+		return;
+	}
+
+	bHasHandledDeath = true;
+
+	if (AbilitySystemComponent)
+	{
+		AbilitySystemComponent->SetLooseGameplayTagCount(GetDeadTag(), 1, EGameplayTagReplicationState::TagOnly);
+	}
+
+	if (UWorld* World = GetWorld())
+	{
+		if (APvPDemoGameMode* GameMode = World->GetAuthGameMode<APvPDemoGameMode>())
+		{
+			GameMode->RequestPlayerRespawn(GetController(), this, RespawnDelay);
+		}
+	}
+
+	MulticastHandleDeath();
+}
+
+void APvPDemoCharacter::MulticastHandleDeath_Implementation()
+{
+	if (bHasNotifiedDeath)
+	{
+		return;
+	}
+
+	bHasNotifiedDeath = true;
+
+	GetCharacterMovement()->DisableMovement();
+	GetCapsuleComponent()->SetCollisionEnabled(ECollisionEnabled::NoCollision);
+	GetMesh()->SetHiddenInGame(true, true);
+
+	BP_OnDeath();
+}
+
+void APvPDemoCharacter::RestoreRespawnState()
+{
+	if (!HasAuthority())
+	{
+		return;
+	}
+
+	MulticastRestoreRespawnState();
+}
+
+void APvPDemoCharacter::MulticastRestoreRespawnState_Implementation()
+{
+	GetCharacterMovement()->SetMovementMode(MOVE_Walking);
+	GetCapsuleComponent()->SetCollisionEnabled(ECollisionEnabled::QueryAndPhysics);
+	GetMesh()->SetHiddenInGame(false, true);
+}
+
 bool APvPDemoCharacter::AddHeldItemTag(FGameplayTag Tag)
 {
 	if (!HasAuthority())

Source/PvPDemo/PvPDemoCharacter.h

@@ -14,6 +14,7 @@ class UInputAction;
 class UAbilitySystemComponent;
 class UAttributeSet;
 struct FInputActionValue;
+struct FOnAttributeChangeData;
 class UGameplayAbility;
 
 DECLARE_LOG_CATEGORY_EXTERN(LogTemplateCharacter, Log, All);
@@ -79,6 +80,7 @@ protected:
 
 	/** Initialize input action bindings */
 	virtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;
+	virtual void EndPlay(const EEndPlayReason::Type EndPlayReason) override;
 
 protected:
 
@@ -109,6 +111,10 @@ public:
 	// UFUNCTION(BlueprintCallable, Category="Input")
 	// virtual void DoAttack();
 
+protected:
+	UFUNCTION(BlueprintImplementableEvent, Category="Death")
+	void BP_OnDeath();
+
 public:
 
 	/** Returns CameraBoom subobject **/
@@ -119,14 +125,33 @@ public:
 	
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category="Items")
 	TSubclassOf<UGameplayAbility> HeldItem;
+
+	UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category="Respawn", meta=(ClampMin="0", Units="s"))
+	float RespawnDelay = 2.f;
+
+	void RestoreRespawnState();
 	
 private:
 	void InitAbilityActorInfo();
+	void BindHealthChangedDelegate();
+	void UnbindHealthChangedDelegate();
+	void OnHealthChanged(const FOnAttributeChangeData& Data);
+	void HandleDeath();
+
+	UFUNCTION(NetMulticast, Reliable)
+	void MulticastHandleDeath();
+
+	UFUNCTION(NetMulticast, Reliable)
+	void MulticastRestoreRespawnState();
 	
 	UFUNCTION(BlueprintCallable)
 	bool AddHeldItemTag(FGameplayTag Tag);
 	
 	UFUNCTION(BlueprintCallable)
 	bool RemoveHeldItemTag(FGameplayTag Tag);
+
+	FDelegateHandle HealthChangedHandle;
+	bool bHasHandledDeath = false;
+	bool bHasNotifiedDeath = false;
 };
 

Source/PvPDemo/PvPDemoGameMode.cpp

@@ -2,7 +2,92 @@
 
 #include "PvPDemoGameMode.h"
 
+#include "AbilitySystemComponent.h"
+#include "GameFramework/Controller.h"
+#include "GameFramework/Pawn.h"
+#include "MainAttributeSet.h"
+#include "MainPlayerState.h"
+#include "PvPDemoCharacter.h"
+#include "TimerManager.h"
+
+namespace
+{
+	FGameplayTag GetDeadTag()
+	{
+		return FGameplayTag::RequestGameplayTag(FName(TEXT("State.Dead")));
+	}
+}
+
 APvPDemoGameMode::APvPDemoGameMode()
 {
 	// stub
 }
+
+void APvPDemoGameMode::RequestPlayerRespawn_Implementation(AController* Controller, APawn* DeadPawn, float DelaySeconds)
+{
+	if (!Controller)
+	{
+		return;
+	}
+
+	const TWeakObjectPtr<AController> ControllerWeak = Controller;
+	const TWeakObjectPtr<APawn> DeadPawnWeak = DeadPawn;
+
+	FTimerDelegate RespawnDelegate;
+	RespawnDelegate.BindWeakLambda(this, [this, ControllerWeak, DeadPawnWeak]()
+	{
+		RespawnPlayer(ControllerWeak.Get(), DeadPawnWeak.Get());
+	});
+
+	FTimerHandle RespawnTimer;
+	if (DelaySeconds <= 0.f)
+	{
+		RespawnDelegate.ExecuteIfBound();
+		return;
+	}
+
+	GetWorldTimerManager().SetTimer(RespawnTimer, RespawnDelegate, DelaySeconds, false);
+}
+
+void APvPDemoGameMode::RespawnPlayer(AController* Controller, APawn* DeadPawn)
+{
+	if (!Controller)
+	{
+		return;
+	}
+
+	ResetRespawnAttributes(Controller);
+
+	APawn* OldPawn = DeadPawn;
+	if (OldPawn && Controller->GetPawn() == OldPawn)
+	{
+		Controller->UnPossess();
+	}
+
+	RestartPlayer(Controller);
+
+	if (APvPDemoCharacter* RespawnedCharacter = Cast<APvPDemoCharacter>(Controller->GetPawn()))
+	{
+		RespawnedCharacter->RestoreRespawnState();
+	}
+
+	if (OldPawn && OldPawn != Controller->GetPawn() && Controller->GetPawn())
+	{
+		OldPawn->Destroy();
+	}
+}
+
+void APvPDemoGameMode::ResetRespawnAttributes(AController* Controller) const
+{
+	const AMainPlayerState* MainPlayerState = Controller ? Controller->GetPlayerState<AMainPlayerState>() : nullptr;
+	UAbilitySystemComponent* ASC = MainPlayerState ? MainPlayerState->GetAbilitySystemComponent() : nullptr;
+	if (!ASC)
+	{
+		return;
+	}
+
+	ASC->SetLooseGameplayTagCount(GetDeadTag(), 0, EGameplayTagReplicationState::TagOnly);
+
+	const float MaxHealth = ASC->GetNumericAttribute(UMainAttributeSet::GetMaxHealthAttribute());
+	ASC->SetNumericAttributeBase(UMainAttributeSet::GetHealthAttribute(), MaxHealth);
+}

Source/PvPDemo/PvPDemoGameMode.h

@@ -6,6 +6,9 @@
 #include "GameFramework/GameModeBase.h"
 #include "PvPDemoGameMode.generated.h"
 
+class AController;
+class APawn;
+
 /**
  *  Simple GameMode for a third person game
  */
@@ -18,7 +21,15 @@ public:
 	
 	/** Constructor */
 	APvPDemoGameMode();
+
+	UFUNCTION(BlueprintAuthorityOnly, BlueprintNativeEvent, Category="Respawn")
+	void RequestPlayerRespawn(AController* Controller, APawn* DeadPawn, float DelaySeconds);
+
+	UFUNCTION(BlueprintCallable, BlueprintAuthorityOnly, Category="Respawn")
+	void RespawnPlayer(AController* Controller, APawn* DeadPawn);
+
+private:
+	void ResetRespawnAttributes(AController* Controller) const;
 };
 
 
-