a5c-ai/unreal-gamesframework

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

1. Use tags extensively
2. Keep abilities modular
3. Handle prediction properly
4. Test multiplayer thoroughly
5. Document ability interactions

References

• GAS Documentation