53. Gameplay Effect Delegates

Project/Config/DefaultGameplayTags.ini

@@ -0,0 +1,16 @@
+[/Script/GameplayTags.GameplayTagsSettings]
+ImportTagsFromConfig=True
+WarnOnInvalidTags=True
+ClearInvalidTags=False
+AllowEditorTagUnloading=True
+AllowGameTagUnloading=False
+FastReplication=False
+InvalidTagCharacters="\"\',"
++GameplayTagTableList=/Game/Core/DT_PrimaryAttributes.DT_PrimaryAttributes
+NumBitsForContainerSize=6
+NetIndexFirstBitSegment=16
++GameplayTagList=(Tag="Attributes.Vital.Health",DevComment="")
++GameplayTagList=(Tag="Attributes.Vital.Mana",DevComment="")
++GameplayTagList=(Tag="Attributes.Vital.MaxHealth",DevComment="")
++GameplayTagList=(Tag="Attributes.Vital.MaxMana",DevComment="")
+

Project/Saved/AssetData/DataTableEditorLayout/DT_PrimaryAttributes.json

@@ -0,0 +1,7 @@
+{
+	"ColumnWidths":
+	{
+		"DevComment": 405,
+		"Tag": 381
+	}
+}

Project/Source/Gasa/AbilitySystem/EffectProperties.cpp

@@ -0,0 +1,38 @@
+#include "EffectProperties.h"
+
+#include "AbilitySystemComponent.h"
+#include "AbilitySystemGlobals.h"
+#include "GameplayEffect.h"
+#include "GameplayEffectExtension.h"
+#include "GameFramework/Pawn.h"
+#include "GameFramework/PlayerController.h"
+
+void FEffectProperties::Populate(FGameplayEffectModCallbackData const& Data)
+{
+	Context             = Data.EffectSpec.GetContext();
+	SourceAbilitySystem = Context.GetOriginalInstigatorAbilitySystemComponent();
+
+	if (IsValid(SourceAbilitySystem)
+		&& SourceAbilitySystem->AbilityActorInfo.IsValid()
+		&& SourceAbilitySystem->AbilityActorInfo->AvatarActor.IsValid())
+	{
+		FGameplayAbilityActorInfo* AbilityInfo = SourceAbilitySystem->AbilityActorInfo.Get();
+		SourceAvatar     = AbilityInfo->AvatarActor.Get();
+		SourceController = AbilityInfo->PlayerController.Get();
+
+		if (SourceController == nullptr && SourceAvatar)
+		{
+			APawn* Pawn = Cast<APawn>(SourceAvatar);
+			if (Pawn)
+				SourceController = Pawn->GetController();
+		}
+	}
+
+	if (Data.Target.AbilityActorInfo.IsValid() && Data.Target.AbilityActorInfo->AvatarActor.IsValid())
+	{
+		FGameplayAbilityActorInfo* AbilityInfo = Data.Target.AbilityActorInfo.Get();
+		TargetAvatar        = AbilityInfo->AvatarActor.Get();
+		TargetController    = AbilityInfo->PlayerController.Get();
+		TargetAbilitySystem = UAbilitySystemGlobals::GetAbilitySystemComponentFromActor(TargetAvatar);
+	}
+}

Project/Source/Gasa/AbilitySystem/EffectProperties.h

@@ -0,0 +1,34 @@
+#pragma once
+
+#include "GameplayEffectTypes.h"
+#include "GasaCommon.h"
+
+#include "EffectProperties.generated.h"
+
+USTRUCT()
+struct GASA_API FEffectProperties
+{
+	GENERATED_BODY()
+
+	FGameplayEffectContextHandle Context;
+
+	UPROPERTY(VisibleAnywhere)
+	UAbilitySystemComponent* SourceAbilitySystem;
+	
+	UPROPERTY(VisibleAnywhere)
+	AActor* SourceAvatar;
+
+	UPROPERTY(VisibleAnywhere)
+	AController* SourceController;
+	
+	UPROPERTY(VisibleAnywhere)
+	UAbilitySystemComponent* TargetAbilitySystem;
+	
+	UPROPERTY(VisibleAnywhere)
+	AActor* TargetAvatar;
+
+	UPROPERTY(VisibleAnywhere)
+	APlayerController* TargetController;
+
+	void Populate(FGameplayEffectModCallbackData const& Data);
+};

Project/Source/Gasa/AbilitySystem/GasaAbilitySystemComponent_Inlines.h

@@ -18,7 +18,7 @@ namespace Gasa
 
 	// From: UAbilitySystemGlobals::GetAbilitySystemComponentFromActor
 	inline
-	UGasaAbilitySystemComp* GetAbilitySystem(AActor* Actor, bool LookForComponent = false)
+	UGasaAbilitySystemComp* GetAbilitySystem(AActor* Actor, bool LookForComponent = true)
 	{
 		if (Actor == nullptr)
 			return nullptr;

Project/Source/Gasa/AbilitySystem/GasaAttributeSet.cpp

@@ -1,6 +1,7 @@
 // Generated by GasaGen/GasaGen_UGasaAttributeSet.cpp
 #include "GasaAttributeSet.h"
 #include "GasaAttributeSet_Inlines.h"
+#include "EffectProperties.h"
 
 #include "AbilitySystemComponent.h"
 #include "Net/UnrealNetwork.h"
@@ -8,9 +9,9 @@
 
 UGasaAttributeSet::UGasaAttributeSet()
 {
-	InitHealth( 50.f );
+	InitHealth( 100.f );
 	InitMaxHealth( 100.f );
-	InitMana( 25.f );
+	InitMana( 50.f );
 	InitMaxMana( 50.f );
 }
 
@@ -41,6 +42,35 @@ void UGasaAttributeSet::Client_OnRep_MaxMana( FGameplayAttributeData& PrevMaxMan
 }
 #pragma endregion Rep Notifies
 
+void UGasaAttributeSet::PostGameplayEffectExecute( FGameplayEffectModCallbackData const& Data )
+{
+	Super::PostGameplayEffectExecute( Data );
+	FEffectProperties Props;
+	Props.Populate( Data );
+}
+
+void UGasaAttributeSet::PreAttributeChange( FGameplayAttribute const& Attribute, float& NewValue )
+{
+	Super::PreAttributeChange( Attribute, NewValue );
+
+	if ( Attribute == GetHealthAttribute() )
+	{
+		NewValue = FMath::Clamp( NewValue, 0, GetMaxHealth() );
+	}
+	if ( Attribute == GetMaxHealthAttribute() )
+	{
+		NewValue = FMath::Clamp( NewValue, 0, 99999.000000 );
+	}
+	if ( Attribute == GetManaAttribute() )
+	{
+		NewValue = FMath::Clamp( NewValue, 0, GetMaxMana() );
+	}
+	if ( Attribute == GetMaxManaAttribute() )
+	{
+		NewValue = FMath::Clamp( NewValue, 0, 99999.000000 );
+	}
+}
+
 void UGasaAttributeSet::GetLifetimeReplicatedProps( TArray<FLifetimeProperty>& OutLifetimeProps ) const
 {
 	Super::GetLifetimeReplicatedProps( OutLifetimeProps );

Project/Source/Gasa/AbilitySystem/GasaAttributeSet.h

@@ -9,20 +9,16 @@ class GASA_API UGasaAttributeSet : public UAttributeSet
 {
 	GENERATED_BODY()
 public:
-	UPROPERTY( ReplicatedUsing = Client_OnRep_Health, EditAnywhere, BlueprintReadWrite, Category = "Attributes" )
-	FGameplayAttributeData Health;
-
-	UPROPERTY( ReplicatedUsing = Client_OnRep_MaxHealth, EditAnywhere, BlueprintReadWrite, Category = "Attributes" )
-	FGameplayAttributeData MaxHealth;
-
-	UPROPERTY( ReplicatedUsing = Client_OnRep_Mana, EditAnywhere, BlueprintReadWrite, Category = "Attributes" )
-	FGameplayAttributeData Mana;
-
-	UPROPERTY( ReplicatedUsing = Client_OnRep_MaxMana, EditAnywhere, BlueprintReadWrite, Category = "Attributes" )
-	FGameplayAttributeData MaxMana;
-
 	UGasaAttributeSet();
 
+	UPROPERTY( ReplicatedUsing = Client_OnRep_Health, EditAnywhere, BlueprintReadWrite, Category = "Attributes" )
+	FGameplayAttributeData Health;
+	UPROPERTY( ReplicatedUsing = Client_OnRep_MaxHealth, EditAnywhere, BlueprintReadWrite, Category = "Attributes" )
+	FGameplayAttributeData MaxHealth;
+	UPROPERTY( ReplicatedUsing = Client_OnRep_Mana, EditAnywhere, BlueprintReadWrite, Category = "Attributes" )
+	FGameplayAttributeData Mana;
+	UPROPERTY( ReplicatedUsing = Client_OnRep_MaxMana, EditAnywhere, BlueprintReadWrite, Category = "Attributes" )
+	FGameplayAttributeData MaxMana;
 
 	UFUNCTION()
 	void Client_OnRep_Health( FGameplayAttributeData& PrevHealth );
@@ -90,6 +86,12 @@ public:
 	}
 	#pragma endregion Setters
 
+#pragma region AttributeSet
+	    void
+	     PreAttributeChange( const FGameplayAttribute& Attribute, float& NewValue ) override;
+	void PostGameplayEffectExecute( FGameplayEffectModCallbackData const& Data ) override;
+	#pragma endregion AttributeSet
+
 #pragma region UObject
 	    void
 	    GetLifetimeReplicatedProps( TArray<FLifetimeProperty>& OutLifetimeProps ) const override;

Project/Source/Gasa/AbilitySystem/GasaEffectActor.cpp

@@ -1,6 +1,7 @@
 #include "GasaEffectActor.h"
 
 #include "GasaAbilitySystemComponent_Inlines.h"
+#include "GasaContainers.h"
 using namespace Gasa;
 
 AGasaEffectActor::AGasaEffectActor()
@@ -8,16 +9,118 @@ AGasaEffectActor::AGasaEffectActor()
 	PrimaryActorTick.bCanEverTick = false;
 
 	RootComponent = CreateDefaultSubobject<USceneComponent>("Root");
+
+	Level = 1.f;
+	
+	InstantEffectUsage  = EInstantEffectUsagePolicy::DoNotApply;
+	DurationEffectUsage = DefaultEffectUsagePolicy;
+	InfiniteEffectUsage = DefaultEffectUsagePolicy;
+
+	bDestroyOnEffectRemoval = false;
 }
 
-void AGasaEffectActor::ApplyEffectToActor(AActor* Actor, TSubclassOf<UGameplayEffect> EffectClass)
+void AGasaEffectActor::ApplyEffectToActor(AActor* Actor, TSubclassOf<UGameplayEffect> EffectClass, bool bRemoveOnEndOverlap)
 {
 	UGasaAbilitySystemComp* AS = GetAbilitySystem(Actor, true);
-
 	FGameplayEffectContextHandle
 	Context = AS->MakeEffectContext();
 	Context.AddSourceObject(Actor);
 
-	FGameplayEffectSpecHandle Spec = AS->MakeOutgoingSpec( EffectClass, 1.0f, Context );
-	AS->ApplyGameplayEffectSpecToSelf( * Spec.Data );
+	FGameplayEffectSpecHandle   Spec         = AS->MakeOutgoingSpec( EffectClass, Level, Context );
+	FActiveGameplayEffectHandle ActiveEffect = AS->ApplyGameplayEffectSpecToSelf( * Spec.Data );
+	if (bRemoveOnEndOverlap)
+		ActiveEffectsToRemove.Add(ActiveEffect, AS);
+}
+
+void AGasaEffectActor::OnOverlap(AActor* Actor)
+{
+	UGasaAbilitySystemComp* AS = GetAbilitySystem(Actor, true);
+	FGameplayEffectContextHandle
+	Context = AS->MakeEffectContext();
+	Context.AddSourceObject(Actor);
+	
+	if (InstantEffectClass && InstantEffectUsage == EInstantEffectUsagePolicy::ApplyOnOverlap)
+	{
+		FGameplayEffectSpecHandle Spec= AS->MakeOutgoingSpec( InstantEffectClass, Level, Context );
+		AS->ApplyGameplayEffectSpecToSelf( * Spec.Data );
+	}
+	if (DurationEffectClass)
+	{
+		if (Bitfield_IsSet(DurationEffectUsage, EEffectUsagePolicy::ApplyOnOverlap))
+		{
+        	FGameplayEffectSpecHandle   Spec         = AS->MakeOutgoingSpec( DurationEffectClass, Level, Context );
+			FActiveGameplayEffectHandle ActiveEffect = AS->ApplyGameplayEffectSpecToSelf( * Spec.Data );
+			if (Bitfield_IsSet(DurationEffectUsage, EEffectUsagePolicy::RemoveOnEndOverlap))
+				ActiveDuration = ActiveEffect;
+		}
+		if (ActiveDuration.IsValid() && Bitfield_IsSet(DurationEffectUsage, EEffectUsagePolicy::RemoveOnOverlap))
+			AS->RemoveActiveGameplayEffect(ActiveDuration);
+	}
+	if (InfiniteEffectClass)
+	{
+		bool bApplyOnOverlap = Bitfield_IsSet(InfiniteEffectUsage, EEffectUsagePolicy::ApplyOnOverlap);
+		if (bApplyOnOverlap)
+		{
+			FGameplayEffectSpecHandle   Spec         = AS->MakeOutgoingSpec( InfiniteEffectClass, Level, Context );
+			FActiveGameplayEffectHandle ActiveEffect = AS->ApplyGameplayEffectSpecToSelf( * Spec.Data );
+			if (Bitfield_IsSet(InfiniteEffectUsage, EEffectUsagePolicy::RemoveOnEndOverlap))
+				ActiveInfinite = ActiveEffect;
+		}
+		if (ActiveInfinite.IsValid() && Bitfield_IsSet(InfiniteEffectUsage, EEffectUsagePolicy::RemoveOnOverlap))
+		{
+			if (ActiveInfinite.IsValid())
+				AS->RemoveActiveGameplayEffect(ActiveInfinite);
+		}
+	}
+}
+
+void AGasaEffectActor::OnEndOverlap(AActor* Actor)
+{
+	UGasaAbilitySystemComp* AS = GetAbilitySystem(Actor, true);
+	FGameplayEffectContextHandle
+	Context = AS->MakeEffectContext();
+	Context.AddSourceObject(Actor);
+	
+	if (InstantEffectClass && InstantEffectUsage == EInstantEffectUsagePolicy::ApplyOnEndOverlap)
+	{
+		FGameplayEffectSpecHandle Spec= AS->MakeOutgoingSpec( InstantEffectClass, Level, Context );
+		AS->ApplyGameplayEffectSpecToSelf( * Spec.Data );
+	}
+	if (DurationEffectClass)
+	{
+		if (Bitfield_IsSet(DurationEffectUsage, EEffectUsagePolicy::ApplyOnEndOverlap))
+		{
+			FGameplayEffectSpecHandle   Spec         = AS->MakeOutgoingSpec( DurationEffectClass, Level, Context );
+			FActiveGameplayEffectHandle ActiveEffect = AS->ApplyGameplayEffectSpecToSelf( * Spec.Data );
+			if (Bitfield_IsSet(DurationEffectUsage, EEffectUsagePolicy::RemoveOnOverlap))
+				ActiveDuration = ActiveEffect;
+		}
+		if (ActiveDuration.IsValid() && Bitfield_IsSet(DurationEffectUsage, EEffectUsagePolicy::RemoveOnEndOverlap))
+			AS->RemoveActiveGameplayEffect(ActiveDuration);
+	}
+	if (InfiniteEffectClass)
+	{
+		if (Bitfield_IsSet(InfiniteEffectUsage, EEffectUsagePolicy::ApplyOnEndOverlap))
+		{
+			FGameplayEffectSpecHandle   Spec         = AS->MakeOutgoingSpec( InfiniteEffectClass, Level, Context );
+			FActiveGameplayEffectHandle ActiveEffect = AS->ApplyGameplayEffectSpecToSelf( * Spec.Data );
+			if (Bitfield_IsSet(InfiniteEffectUsage, EEffectUsagePolicy::RemoveOnOverlap))
+				ActiveInfinite = ActiveEffect;
+		}
+		if (ActiveInfinite.IsValid() && Bitfield_IsSet(InfiniteEffectUsage, EEffectUsagePolicy::RemoveOnEndOverlap))
+		{
+			if (ActiveInfinite.IsValid())
+				AS->RemoveActiveGameplayEffect(ActiveInfinite);
+		}
+	}
+
+	TArray<FActiveGameplayEffectHandle> EffectsRemoved;
+	for (ActiveEffectEntry ActiveEffect : ActiveEffectsToRemove)
+	{
+		if (ActiveEffect.Value != AS)
+			continue;
+		AS->RemoveActiveGameplayEffect(ActiveEffect.Key, 1);
+		EffectsRemoved.Add(ActiveEffect.Key);
+	}
+	RemoveKeys(ActiveEffectsToRemove, EffectsRemoved);
 }

Project/Source/Gasa/AbilitySystem/GasaEffectActor.h

@@ -2,25 +2,77 @@
 
 #include "GasaCommon.h"
 #include "Actors/GasaActor.h"
+#include "ActiveGameplayEffectHandle.h"
 #include "GameFramework/Actor.h"
 
 #include "GasaEffectActor.generated.h"
 
+struct FActiveGameplayEffectHandle;
+
+UENUM(BlueprintType)
+enum class EInstantEffectUsagePolicy : uint8
+{
+	DoNotApply,
+	ApplyOnOverlap,
+	ApplyOnEndOverlap,
+};
+
+UENUM(BlueprintType, meta = (Bitflags, UseEnumValuesAsMaskValuesInEditor = "true"))
+enum class EEffectUsagePolicy : uint8
+{
+	None               = 0 UMETA(Hidden),
+	ApplyOnOverlap     = bit(0),
+	ApplyOnEndOverlap  = bit(1),
+	RemoveOnOverlap    = bit(2),
+	RemoveOnEndOverlap = bit(3),
+};
+
+constexpr int32 DefaultEffectUsagePolicy = (int32(EEffectUsagePolicy::RemoveOnEndOverlap));
+
 UCLASS()
 class GASA_API AGasaEffectActor : public AGasaActor
 {
 	GENERATED_BODY()
 public:
 
+	AGasaEffectActor();
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Gameplay Effects")
+	float Level;
+
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Gameplay Effects")
 	TSubclassOf<UGameplayEffect> InstantEffectClass;
-	
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Gameplay Effects")
+	EInstantEffectUsagePolicy InstantEffectUsage;
+
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Gameplay Effects")
 	TSubclassOf<UGameplayEffect> DurationEffectClass;
 	
-	AGasaEffectActor();
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Gameplay Effects", meta=(Bitmask, BitmaskEnum = "/Script/Gasa.EEffectUsagePolicy"))
+	int32 DurationEffectUsage;
+	
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Gameplay Effects")
+	TSubclassOf<UGameplayEffect> InfiniteEffectClass;
+	
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Gameplay Effects", meta=(Bitmask, BitmaskEnum = "/Script/Gasa.EEffectUsagePolicy"))
+	int32 InfiniteEffectUsage;
+	
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Gameplay Effects")
+	bool bDestroyOnEffectRemoval;
 
+	TMap<FActiveGameplayEffectHandle, UAbilitySystemComponent*> ActiveEffectsToRemove;
+	using ActiveEffectEntry = TTuple<FActiveGameplayEffectHandle, UAbilitySystemComponent*>;
+	
+	FActiveGameplayEffectHandle ActiveDuration;
+	FActiveGameplayEffectHandle ActiveInfinite;
+	
 	UFUNCTION(BlueprintCallable, Category = "Gameplay Effects")
-	void ApplyEffectToActor(AActor* Actor, TSubclassOf<UGameplayEffect> EffectClass );
-};
+	void ApplyEffectToActor(AActor* Actor, TSubclassOf<UGameplayEffect> EffectClass, bool bRemoveOnEndOverlap = false);
 
+	UFUNCTION(BlueprintCallable)
+	void OnOverlap(AActor* Actor);
+
+	UFUNCTION(BlueprintCallable)
+	void OnEndOverlap(AActor* Actor);
+};

Project/Source/Gasa/Game/GasaGameInstance.h

@@ -45,7 +45,7 @@ public:
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "GameFramework")
 	EGameFrameworkState GameFrameworkState;
 
-	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "GameFramework", meta=(Bitmask, BitmaskEnum = EGameFrameworkClassFlag))
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "GameFramework", meta=(Bitmask, BitmaskEnum = "/Script/Gasa.EGameFrameworkClassFlag"))
 	int32 GameFrameworkClassesState;
 
 	UFUNCTION(BlueprintCallable, Category="GameFramework")

Project/Source/Gasa/GasaCommon.h

@@ -13,12 +13,16 @@
 #define rcast( Type, Value ) reinterpret_cast<Type>( Value )
 #define scast( Type, Value ) static_cast<Type>( Value )
 
+#define bit(position) (1 << position)
+
 #pragma region Math
 #define m_pow2( value ) (value * value)
 #pragma endregion Math
 
 #pragma region Engine Forwards
 struct FInputActionValue;
+struct FGameplayEffectContextHandle;
+struct FGameplayEffectModCallbackData;
 struct FOnAttributeChangeData;
 struct FReplicationFlags;
 
@@ -78,13 +82,30 @@ namespace Gasa
 {
 	inline
 	bool Bitfield_IsSet(int32 Bitfield, int32 Bitmask) {
-		int32 Result = Bitmask == (Bitfield & Bitmask);
-		return scast(bool, Result);
+		bool Result = Bitmask == (Bitfield & Bitmask);
+		return Result;
+	}
+	inline
+	bool Bitfield_IsSetExactly(int32 Bitfield, int32 Bitmask)
+	{
+		bool Result = Bitfield == (Bitfield & Bitmask);
+		return Result;
 	}
 
 	inline void Bitfield_Set   ( int32& Bitfield, int32 BitsToAdd )    { Bitfield |= BitsToAdd; }
 	inline void Bitfield_Remove( int32& Bitfield, int32 BitsToRemove ) { Bitfield &= (! BitsToRemove); }
 	inline void Bitfield_Toggle( int32& Bitfield, int32 Bitmask )      { Bitfield ^= Bitmask; }
+
+	template<typename EnumType>
+	inline
+	bool Bitfield_IsSet(int32 Bitfield, EnumType Mask)
+	{
+		bool Result = int32(Mask) == (Bitfield & int32(Mask));
+		return Result;
+	}
+	template<typename EnumType> inline void Bitfield_Set   ( int32& Bitfield, EnumType BitToAdd )    { Bitfield |= int32(BitToAdd); }
+	template<typename EnumType> inline void Bitfield_Remove( int32& Bitfield, EnumType BitToRemove ) { Bitfield &= (! int32(BitToRemove)); }
+	template<typename EnumType> inline void Bitfield_Toggle( int32& Bitfield, EnumType BitToToggle ) { Bitfield ^= int32(BitToToggle); }
 }
 #pragma endregion Bitfields
 

Project/Source/Gasa/GasaContainers.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "GasaCommon.h"
+
+template<typename KeyType, typename ValueType>
+inline
+void RemoveKeys(TMap<KeyType, ValueType> Map, TArray<KeyType> Keys)
+{
+	for (KeyType& Key : Keys )
+	{
+		Map.Remove(Key);
+	}
+}
+	

Project/Source/GasaGen/GasaGenCommon.cpp

@@ -77,6 +77,9 @@ CodeBody parse_file( char const* path ) {
 	return code;
 }
 
+// inline
+// CodeConstructor find_constructor( StrC parent_name, )
+
 inline
 void format_file( char const* path )
 {

Project/Source/GasaGen/GasaGen_HostWidgetController.cpp

@@ -4,11 +4,12 @@
 #include "gen.hpp"
 #include "gen.builder.hpp"
 #include "GasaGenCommon.cpp"
+#include "GasaGen_UGasaAttributeSet.cpp"
 #endif
 
 void gen_UHostWidgetController()
 {
-	Array<StringCached> attribute_fields = get_gasa_attribute_fields();
+	Array<GAS_AttributeEntry> attribute_fields = get_gasa_attribute_fields();
 
 	CodeBody ori_HostWidgetController_header = parse_file(path_gasa_ui "HostWidgetController.h");
 	{
@@ -64,21 +65,21 @@ void gen_UHostWidgetController()
 
 			for ( s32 id = 0; id < attribute_fields.num(); ++id )
 			{
-				StringCached attribute_field = attribute_fields[id];
+				GAS_AttributeEntry attribute_field = attribute_fields[id];
 
 				attribute_events.append( code_str(
 					UPROPERTY(BlueprintAssignable, Category = "Attributes")
 				));
 				attribute_events.append(fmt_newline);
 				attribute_events.append( parse_variable(
-					token_fmt( "field", (StrC) attribute_field, stringize( FAttributeFloatChangedSig Event_On<field>Changed; ))
+					token_fmt( "field", (StrC) attribute_field.Name, stringize( FAttributeFloatChangedSig Event_On<field>Changed; ))
 				));
 				attribute_events.append(fmt_newline);
 			}
 
 			for ( s32 id = 0; id < attribute_fields.num(); ++id )
 			{
-				StringCached attribute_field = attribute_fields[id];
+				StringCached attribute_field = attribute_fields[id].Name;
 
 				attribute_events.append( parse_function(
 					token_fmt( "field", (StrC) attribute_field, stringize( void <field>Changed(FOnAttributeChangeData const& Data); ))
@@ -154,9 +155,9 @@ void gen_UHostWidgetController()
 		CodeFn BroadcastInitialValues = NoCode;
 		{
 			CodeBody broadcast_calls = def_body(ECode::Function_Body);
-			for (StringCached field : attribute_fields)
+			for (GAS_AttributeEntry field : attribute_fields)
 			{
-				broadcast_calls.append( code_fmt( "field", (StrC)field,
+				broadcast_calls.append( code_fmt( "field", (StrC)field.Name,
 					stringize( Event_On<field>Changed.Broadcast( GasaAttribs->Get<field>() ); )
 				));
 			}
@@ -185,9 +186,9 @@ void gen_UHostWidgetController()
 			CodeBody bindings = def_body(ECode::Function_Body);
 			bindings.append(fmt_newline);
 			bindings.append(fmt_newline);
-			for (StringCached field : attribute_fields)
+			for (GAS_AttributeEntry field : attribute_fields)
 			{
-				bindings.append( code_fmt( "field", (StrC)field,
+				bindings.append( code_fmt( "field", (StrC)field.Name,
 				stringize(
 					FOnGameplayAttributeValueChange& <field>AttributeChangedDelegate = AbilitySystem->GetGameplayAttributeValueChangeDelegate(GasaAttribs->Get<field>Attribute());
 					<field>AttributeChangedDelegate.AddUObject(this, &ThisClass::<field>Changed);
@@ -219,7 +220,7 @@ void gen_UHostWidgetController()
 
 			for ( s32 id = 0; id < attribute_fields.num(); )
 			{
-				StringCached attribute_field = attribute_fields[id];
+				StringCached attribute_field = attribute_fields[id].Name;
 
 				attribute_callbacks.append( parse_function( token_fmt(
 					"field", (StrC) attribute_field,

Project/Source/GasaGen/GasaGen_UGasaAttributeSet.cpp

@@ -7,25 +7,44 @@
 #include "GasaGenCommon.cpp"
 #endif
 
-void def_attribute_properties                   ( CodeBody body, Array<StringCached> properties );
-void def_attribute_field_on_reps                ( CodeBody body, Array<StringCached> properties );
-void def_attribute_field_property_getters       ( CodeBody body, StrC class_name, Array<StringCached> properties );
-void def_attribute_field_value_getters          ( CodeBody body, Array<StringCached> properties );
-void def_attribute_field_value_setters          ( CodeBody body, Array<StringCached> properties );
-void def_attribute_field_property_setter_inlines( CodeBody body, StrC class_name, Array<StringCached> properties );
-void def_attribute_field_initers                ( CodeBody body, Array<StringCached> properties );
-void impl_attribute_fields                      ( CodeBody body, StrC class_name, Array<StringCached> properties );
+struct GAS_AttributeEntry
+{
+	StringCached Name;
+	StringCached MinName;
+	StringCached MaxName;
+	float Min;
+	float Max;
+};
 
-Array<StringCached> get_gasa_attribute_fields()
+void def_attribute_properties                   ( CodeBody body, Array<GAS_AttributeEntry> properties );
+void def_attribute_field_on_reps                ( CodeBody body, Array<GAS_AttributeEntry> properties );
+void def_attribute_field_property_getters       ( CodeBody body, StrC class_name, Array<GAS_AttributeEntry> properties );
+void def_attribute_field_value_getters          ( CodeBody body, Array<GAS_AttributeEntry> properties );
+void def_attribute_field_value_setters          ( CodeBody body, Array<GAS_AttributeEntry> properties );
+void def_attribute_field_property_setter_inlines( CodeBody body, StrC class_name, Array<GAS_AttributeEntry> properties );
+void def_attribute_field_initers                ( CodeBody body, Array<GAS_AttributeEntry> properties );
+void impl_attribute_fields                      ( CodeBody body, StrC class_name, Array<GAS_AttributeEntry> properties );
+
+Array<GAS_AttributeEntry> get_gasa_attribute_fields()
 {
 	local_persist
-	Array<StringCached> attribute_fields = Array<StringCached>::init_reserve(GlobalAllocator, 64);
+	Array<GAS_AttributeEntry> attribute_fields = Array<GAS_AttributeEntry>::init_reserve(GlobalAllocator, 64);
 
 	for (local_persist s32 do_once = 0; do_once == 0; ++ do_once) {
-		attribute_fields.append( get_cached_string(txt("Health")));
-		attribute_fields.append( get_cached_string(txt("MaxHealth")));
-		attribute_fields.append( get_cached_string(txt("Mana")));
-		attribute_fields.append( get_cached_string(txt("MaxMana")));
+		StringCached str_Health    = get_cached_string(txt("Health"));
+		StringCached str_MaxHealth = get_cached_string(txt("MaxHealth"));
+		StringCached str_Mana      = get_cached_string(txt("Mana"));
+		StringCached str_MaxMana   = get_cached_string(txt("MaxMana"));
+
+		GAS_AttributeEntry Health    = { str_Health,    {nullptr}, str_MaxHealth, 0, 100.f   };
+		GAS_AttributeEntry MaxHealth = { str_MaxHealth, {nullptr}, {nullptr},     0, 99999.f };
+		GAS_AttributeEntry Mana      = { str_Mana,      {nullptr}, str_MaxMana,   0, 50.f    };
+		GAS_AttributeEntry MaxMana   = { str_MaxMana,   {nullptr}, {nullptr},     0, 99999.f };
+
+		attribute_fields.append(Health);
+		attribute_fields.append(MaxHealth);
+		attribute_fields.append(Mana);
+		attribute_fields.append(MaxMana);
 	}
 	return attribute_fields;
 }
@@ -35,7 +54,7 @@ void gen_UGasaAttributeSet()
 	CodeType   type_UAttributeSet = def_type( txt("UAttributeSet") );
 	CodeComment generation_notice = def_comment(txt("Generated by GasaGen/GasaGen_UGasaAttributeSet.cpp"));
 
-	Array<StringCached> attribute_fields = get_gasa_attribute_fields();
+	Array<GAS_AttributeEntry> attribute_fields = get_gasa_attribute_fields();
 
 	StrC class_name = txt("UGasaAttributeSet");
 
@@ -57,32 +76,39 @@ void gen_UGasaAttributeSet()
 					body.append( UHT_GENERATED_BODY);
 					body.append( access_public );
 
-					def_attribute_properties( body, attribute_fields);
-
-					body.append(fmt_newline);
 					body.append( def_constructor() );
 					body.append(fmt_newline);
 
+					def_attribute_properties( body, attribute_fields);
+					body.append(fmt_newline);
 					def_attribute_field_on_reps( body, attribute_fields);
 
 					body.append(fmt_newline);
 
 					body.append( fmt_newline );
-					body.append( def_pragma(code( region Getters )));
+					body.append( def_pragma(txt( "region Getters" )));
 					def_attribute_field_property_getters( body, class_name, attribute_fields );
 					body.append( fmt_newline );
 					def_attribute_field_value_getters( body, attribute_fields );
-					body.append( def_pragma(code( endregion Getters )));
+					body.append( def_pragma(txt( "endregion Getters" )));
 					body.append( fmt_newline );
 
-					body.append( def_pragma(code( region Setters )));
+					body.append( def_pragma(txt( "region Setters" )));
 					def_attribute_field_value_setters( body, attribute_fields );
 					body.append( fmt_newline );
 					body.append( fmt_newline );
 					def_attribute_field_initers( body, attribute_fields );
-					body.append( def_pragma(code( endregion Setters )));
+					body.append( def_pragma(txt( "endregion Setters" )));
 					body.append( fmt_newline );
 
+					body.append( def_pragma( txt("region AttributeSet")));
+					body.append( code_str(
+						void PreAttributeChange(const FGameplayAttribute& Attribute, float& NewValue) override;
+						void PostGameplayEffectExecute(FGameplayEffectModCallbackData const& Data) override;
+					));
+					body.append( def_pragma( txt("endregion AttributeSet")));
+					body.append(fmt_newline);
+
 					body.append( def_pragma( txt("region UObject")));
 					CodeFn GetLifetimeOfReplicatedProps = parse_function( code(
 						void GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const override;
@@ -144,6 +170,7 @@ void gen_UGasaAttributeSet()
 		header.print(fmt_newline);
 		source.print( def_include( txt("GasaAttributeSet.h")));
 		source.print( def_include( txt("GasaAttributeSet_Inlines.h")));
+		source.print( def_include( txt("EffectProperties.h")));
 		source.print(fmt_newline);
 		source.print( def_include( txt("AbilitySystemComponent.h")));
 		source.print( def_include( txt("Net/UnrealNetwork.h")));
@@ -165,14 +192,68 @@ void gen_UGasaAttributeSet()
 
 			impl_attribute_fields( body, class_name, attribute_fields);
 
+			Code PostGameplayEffectExecute = parse_function( code(
+				void UGasaAttributeSet::PostGameplayEffectExecute(FGameplayEffectModCallbackData const& Data)
+				{
+					Super::PostGameplayEffectExecute(Data);
+					FEffectProperties Props;
+					Props.Populate(Data);
+				}
+			));
+			body.append(PostGameplayEffectExecute);
+			body.append(fmt_newline);
+
+			CodeFn PreAttributeChange;
+			{
+				CodeBody attribute_clamps = def_body( CodeT::Function_Body );
+				attribute_clamps.append(fmt_newline);
+				attribute_clamps.append(fmt_newline);
+				for (GAS_AttributeEntry field : attribute_fields)
+				{
+					String clamp_min;
+					if (field.MinName.Data)
+						clamp_min = get_cached_string(token_fmt( "MinName", (StrC)field.MinName, "Get<MinName>()"));
+					else
+						clamp_min = String::fmt_buf(GlobalAllocator, "%f", field.Min);
+
+					String clamp_max;
+					if (field.MaxName.Data)
+						clamp_max = get_cached_string(token_fmt( "MaxName", (StrC)field.MaxName, "Get<MaxName>()"));
+					else
+						clamp_max = String::fmt_buf(GlobalAllocator, "%f", field.Max);
+
+					attribute_clamps.append( code_fmt(
+						"field",     (StrC)field.Name,
+						"clamp_min", (StrC)clamp_min,
+						"clamp_max", (StrC)clamp_max,
+					stringize(
+						if (Attribute == Get<field>Attribute())
+						{
+							NewValue = FMath::Clamp(NewValue, <clamp_min>, <clamp_max>);
+						}
+					)));
+				}
+				attribute_clamps.append(fmt_newline);
+				attribute_clamps.append(fmt_newline);
+				PreAttributeChange = parse_function( token_fmt( "attribute_clamps", (StrC)attribute_clamps.to_string(), stringize(
+					void UGasaAttributeSet::PreAttributeChange(const FGameplayAttribute& Attribute, float& NewValue)
+					{
+						Super::PreAttributeChange(Attribute, NewValue);
+						<attribute_clamps>
+					}
+				)));
+			}
+			body.append(PreAttributeChange);
+			body.append(fmt_newline);
+
 			CodeFn GetLifetimeOfReplicatedProps;
 			{
 				CodeBody field_lifetimes = def_body( CodeT::Function_Body);
 				field_lifetimes.append(fmt_newline);
 				field_lifetimes.append(fmt_newline);
-				for (StringCached field : attribute_fields)
+				for (GAS_AttributeEntry field : attribute_fields)
 				{
-					field_lifetimes.append( code_fmt( "field", (StrC)field, stringize(
+					field_lifetimes.append( code_fmt( "field", (StrC)field.Name, stringize(
 						DOREPLIFETIME_DEFAULT_GAS(UGasaAttributeSet, <field>);
 					)));
 				}
@@ -194,44 +275,39 @@ void gen_UGasaAttributeSet()
 	}
 }
 
-void def_attribute_properties( CodeBody body, Array<StringCached> properties )
+void def_attribute_properties( CodeBody body, Array<GAS_AttributeEntry> properties )
 {
-	for ( StringCached property : properties )
+	for ( GAS_AttributeEntry property : properties )
 	{
-		Code field_uproperty = code_fmt( "property", (StrC)property, stringize(
+		Code field_uproperty = code_fmt( "property", (StrC)property.Name, stringize(
 			UPROPERTY(ReplicatedUsing=Client_OnRep_<property>, EditAnywhere, BlueprintReadWrite, Category="Attributes")
+			FGameplayAttributeData <property>;
 		));
-
-		CodeType type_FGameplayAttributeData = def_type( txt("FGameplayAttributeData"));
-
-		body.append(fmt_newline);
-		body.append( field_uproperty );
-		body.append(fmt_newline);
-		body.append( def_variable( type_FGameplayAttributeData, StrC(property)) );
+		body.append(field_uproperty);
 	}
 }
 
-void def_attribute_field_on_reps( CodeBody body, Array<StringCached> properties )
+void def_attribute_field_on_reps( CodeBody body, Array<GAS_AttributeEntry> properties )
 {
-	for ( StringCached property : properties )
+	for ( GAS_AttributeEntry property : properties )
 	{
 		Code umeta_UFUNCTION = code_str( UFUNCTION() );
 
 		body.append(fmt_newline);
 		body.append( umeta_UFUNCTION );
 		body.append(fmt_newline);
-		body.append( code_fmt( "property", (StrC)property, stringize(
+		body.append( code_fmt( "property", (StrC)property.Name, stringize(
 			void Client_OnRep_<property>(FGameplayAttributeData& Prev<property>);
 		)));
 	}
 }
 
-void def_attribute_field_property_getters( CodeBody body, StrC class_name, Array<StringCached> properties )
+void def_attribute_field_property_getters( CodeBody body, StrC class_name, Array<GAS_AttributeEntry> properties )
 {
-	for ( String property : properties )
+	for ( GAS_AttributeEntry property : properties )
 	{
 		CodeFn generated_get_attribute = parse_function(
-			token_fmt( "class_name", class_name, "property", (StrC)property,
+			token_fmt( "class_name", class_name, "property", (StrC)property.Name,
 			stringize(
 				static FGameplayAttribute Get<property>Attribute()
 				{
@@ -245,11 +321,11 @@ void def_attribute_field_property_getters( CodeBody body, StrC class_name, Array
 
 #pragma push_macro("FORCEINLINE")
 #undef FORCEINLINE
-void def_attribute_field_value_getters( CodeBody body, Array<StringCached> properties )
+void def_attribute_field_value_getters( CodeBody body, Array<GAS_AttributeEntry> properties )
 {
-	for ( String property : properties )
+	for ( GAS_AttributeEntry property : properties )
 	{
-		body.append( code_fmt( "property", (StrC)property,
+		body.append( code_fmt( "property", (StrC)property.Name,
 		stringize(
 			FORCEINLINE float Get<property>() const
 			{
@@ -259,24 +335,24 @@ void def_attribute_field_value_getters( CodeBody body, Array<StringCached> prope
 	}
 }
 
-void def_attribute_field_value_setters( CodeBody body, Array<StringCached> properties )
+void def_attribute_field_value_setters( CodeBody body, Array<GAS_AttributeEntry> properties )
 {
-	for ( String property : properties )
+	for ( GAS_AttributeEntry property : properties )
 	{
-		body.append( code_fmt( "property", (StrC)property,
+		body.append( code_fmt( "property", (StrC)property.Name,
 		stringize(
 			FORCEINLINE void Set<property>(float NewVal);
 		)));
 	}
 }
 
-void def_attribute_field_property_setter_inlines( CodeBody body, StrC class_name, Array<StringCached> properties )
+void def_attribute_field_property_setter_inlines( CodeBody body, StrC class_name, Array<GAS_AttributeEntry> properties )
 {
 	body.append(def_pragma( txt("region Attribute Setters")));
-	for ( String property : properties )
+	for ( GAS_AttributeEntry property : properties )
 	{
 		CodeFn generated_get_attribute = parse_function(
-			token_fmt( "class_name", class_name, "property", (StrC)property,
+			token_fmt( "class_name", class_name, "property", (StrC)property.Name,
 			stringize(
 				FORCEINLINE void <class_name>::Set<property>(float NewVal)
 				{
@@ -292,11 +368,11 @@ void def_attribute_field_property_setter_inlines( CodeBody body, StrC class_name
 	body.append(def_pragma( txt("endregion Attribute Setters")));
 }
 
-void def_attribute_field_initers ( CodeBody body, Array<StringCached> properties )
+void def_attribute_field_initers ( CodeBody body, Array<GAS_AttributeEntry> properties )
 {
-	for ( String property : properties )
+	for ( GAS_AttributeEntry property : properties )
 	{
-		body.append( code_fmt( "property", (StrC)property,
+		body.append( code_fmt( "property", (StrC)property.Name,
 		stringize(
 			FORCEINLINE void Init<property>(float NewVal)
 			{
@@ -307,14 +383,14 @@ void def_attribute_field_initers ( CodeBody body, Array<StringCached> properties
 	}
 }
 
-void impl_attribute_fields( CodeBody body, StrC class_name, Array<StringCached> properties )
+void impl_attribute_fields( CodeBody body, StrC class_name, Array<GAS_AttributeEntry> properties )
 {
 	body.append(fmt_newline);
 	body.append(def_pragma( txt("region Rep Notifies")));
-	for ( String property : properties )
+	for ( GAS_AttributeEntry property : properties )
 	{
 		CodeFn field_impl = parse_function( token_fmt(
-			"class_name", class_name, "property", (StrC)property, "from_notice", txt("\n// From GAMEPLAYATTRIBUTE_REPNOTIFY\n"),
+			"class_name", class_name, "property", (StrC)property.Name, "from_notice", txt("\n// From GAMEPLAYATTRIBUTE_REPNOTIFY\n"),
 		stringize(
 			void <class_name>::Client_OnRep_<property>(FGameplayAttributeData& Prev<property>)
 			{

scripts/gencpp.natvis

@@ -55,6 +55,21 @@
 		</Expand>
 	</Type>
 
+	<Type Name="gen::StringCached">
+		<DisplayString Condition="Data == nullptr">null</DisplayString>
+		<DisplayString>{Data,na}</DisplayString>
+		<Expand>
+			<Synthetic Name="Header">
+				<DisplayString>{(Header*)((char*)Data - sizeof(Header))}</DisplayString>
+				<Expand>
+					<Item Name="Allocator">((Header*)((char*)Data - sizeof(Header)))->Allocator</Item>
+					<Item Name="Capacity">((Header*)((char*)Data - sizeof(Header)))->Capacity</Item>
+					<Item Name="Length">((Header*)((char*)Data - sizeof(Header)))->Length</Item>
+				</Expand>
+			</Synthetic>
+		</Expand>
+	</Type>
+
 	<Type Name="gen::String::Header">
 		<DisplayString>Length: {Length}, Capacity: {Capacity}</DisplayString>
 		<Expand>