UAttributeSet::OnAttributeAggregatorCreated

function GameplayAbilities Since unknown

#include "AttributeSet.h"

Access: public Specifiers: virtualconst

Description

Called when the ability system creates an FAggregator for one of this set's attributes, letting you customize the aggregator's EvaluationMetaData before it starts combining modifiers.

Caveats & Gotchas

• Aggregators are created lazily the first time an attribute needs one (e.g. a duration-based effect targets it), not up front for every attribute.
• Only covers aggregator creation; it isn't called for every later change to that aggregator (add/remove modifier, stacking, immunity), so don't treat it as a general change notification.

Signature

virtual void OnAttributeAggregatorCreated(const FGameplayAttribute& Attribute, FAggregator* NewAggregator) const { }

Parameters

Name	Type	Description	Default
Attribute	const FGameplayAttribute&	The attribute the aggregator was created for.	—
NewAggregator	FAggregator*	The newly created aggregator instance backing that attribute.	—

Return Type

void

Example

Assign custom evaluation metadata for Armor C++

void UMyHealthSet::OnAttributeAggregatorCreated(const FGameplayAttribute& Attribute, FAggregator* NewAggregator) const
{
    if (NewAggregator && Attribute == GetArmorAttribute())
    {
        NewAggregator->EvaluationMetaData = &ArmorEvaluationMetaData;
    }
}

Version History

Introduced in: unknown

Version	Status	Notes
5.6	stable	—

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