GKLAttributeSet.h

GASKit Lite v0.1.0 · 86 lines · C++ · MIT license

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1	// Copyright (c) 2026 Reignance Studios. MIT License, see LICENSE.
2
3	#pragma once
4
5	#include "CoreMinimal.h"
6	#include "AbilitySystemComponent.h"
7	#include "AttributeSet.h"
8	#include "GKLAttributeSet.generated.h"
9
10	#define GKL_ATTRIBUTE_ACCESSORS(ClassName, PropertyName) \
11	GAMEPLAYATTRIBUTE_PROPERTY_GETTER(ClassName, PropertyName) \
12	GAMEPLAYATTRIBUTE_VALUE_GETTER(PropertyName) \
13	GAMEPLAYATTRIBUTE_VALUE_SETTER(PropertyName) \
14	GAMEPLAYATTRIBUTE_VALUE_INITTER(PropertyName)
15
16	/**
17	* Health, Stamina and Mana for a multiplayer player.
18	*
19	* - Every gameplay attribute replicates with an OnRep that calls GAMEPLAYATTRIBUTE_REPNOTIFY,
20	* registered with REPNOTIFY_Always, so predicted values on the owning client are confirmed.
21	* - Values are clamped twice: PreAttributeChange clamps what queries return, and
22	* PostGameplayEffectExecute clamps the base value that instant and periodic effects change.
23	* - Damage is a server-only meta attribute: effects add to it, PostGameplayEffectExecute
24	* moves it into Health and sends Event.Death when Health reaches 0.
25	*/
26	UCLASS()
27	class GASKITLITE_API UGKLAttributeSet : public UAttributeSet
28	{
29	GENERATED_BODY()
30
31	public:
32	UGKLAttributeSet();
33
34	virtual void GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const override;
35	virtual void PreAttributeChange(const FGameplayAttribute& Attribute, float& NewValue) override;
36	virtual void PostGameplayEffectExecute(const FGameplayEffectModCallbackData& Data) override;
37
38	/** Server only. Refills Health, Stamina and Mana and re-arms the death event. Called on respawn. */
39	void ResetToMax();
40
41	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite\|Health", ReplicatedUsing = OnRep_Health)
42	FGameplayAttributeData Health;
43	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, Health)
44
45	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite\|Health", ReplicatedUsing = OnRep_MaxHealth)
46	FGameplayAttributeData MaxHealth;
47	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, MaxHealth)
48
49	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite\|Stamina", ReplicatedUsing = OnRep_Stamina)
50	FGameplayAttributeData Stamina;
51	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, Stamina)
52
53	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite\|Stamina", ReplicatedUsing = OnRep_MaxStamina)
54	FGameplayAttributeData MaxStamina;
55	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, MaxStamina)
56
57	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite\|Mana", ReplicatedUsing = OnRep_Mana)
58	FGameplayAttributeData Mana;
59	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, Mana)
60
61	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite\|Mana", ReplicatedUsing = OnRep_MaxMana)
62	FGameplayAttributeData MaxMana;
63	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, MaxMana)
64
65	/** Meta attribute, server only, not replicated. */
66	UPROPERTY(BlueprintReadOnly, Category = "GASKit Lite\|Damage")
67	FGameplayAttributeData Damage;
68	GKL_ATTRIBUTE_ACCESSORS(UGKLAttributeSet, Damage)
69
70	protected:
71	UFUNCTION()
72	void OnRep_Health(const FGameplayAttributeData& OldValue);
73	UFUNCTION()
74	void OnRep_MaxHealth(const FGameplayAttributeData& OldValue);
75	UFUNCTION()
76	void OnRep_Stamina(const FGameplayAttributeData& OldValue);
77	UFUNCTION()
78	void OnRep_MaxStamina(const FGameplayAttributeData& OldValue);
79	UFUNCTION()
80	void OnRep_Mana(const FGameplayAttributeData& OldValue);
81	UFUNCTION()
82	void OnRep_MaxMana(const FGameplayAttributeData& OldValue);
83
84	private:
85	bool bOutOfHealth = false;
86	};

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