unreal-gamesframework

Development

Unreal Engine Gameplay Ability System (GAS) skill for attributes, abilities, and gameplay effects.

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How to use this skill

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Source SKILL.md: https://github.com/a5c-ai/babysitter/blob/HEAD/library/specializations/game-development/skills/unreal-gamesframework/SKILL.md

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Unreal GAS Skill

Gameplay Ability System for Unreal Engine.

Overview

This skill provides capabilities for implementing complex gameplay systems using Unreal's Gameplay Ability System (GAS).

Capabilities

Abilities

Create Gameplay Abilities
Handle ability activation
Manage ability costs
Implement cooldowns

Attributes

Define attribute sets
Handle attribute modifiers
Implement derived attributes
Manage attribute replication

Gameplay Effects

Create instant effects
Implement duration effects
Handle stacking
Manage effect removal

Integration

Implement ability tasks
Handle ability events
Create ability tags
Manage ability instances

Prerequisites

Unreal Engine 5.0+
GameplayAbilities plugin enabled

Usage Patterns

Attribute Set

UCLASS()
class UMyAttributeSet : public UAttributeSet
{
    GENERATED_BODY()

public:
    UPROPERTY(BlueprintReadOnly, ReplicatedUsing=OnRep_Health)
    FGameplayAttributeData Health;
    ATTRIBUTE_ACCESSORS(UMyAttributeSet, Health)

    UPROPERTY(BlueprintReadOnly, ReplicatedUsing=OnRep_MaxHealth)
    FGameplayAttributeData MaxHealth;
    ATTRIBUTE_ACCESSORS(UMyAttributeSet, MaxHealth)
};

Gameplay Ability

UCLASS()
class UGA_Attack : public UGameplayAbility
{
    GENERATED_BODY()

protected:
    virtual void ActivateAbility(
        const FGameplayAbilitySpecHandle Handle,
        const FGameplayAbilityActorInfo* ActorInfo,
        const FGameplayAbilityActivationInfo ActivationInfo,
        const FGameplayEventData* TriggerEventData) override;
};

Best Practices

Use tags extensively
Keep abilities modular
Handle prediction properly
Test multiplayer thoroughly
Document ability interactions

References

GAS Documentation