UE5DetectGameplayTagChanges

Unreal Engine 5 - Detect Gameplay Tag changes on Actor

In this project you can find two approaches on how to detect Gameplay Tag changes on an Actor. Use each based on your needs.

Solution 1: Basic Polling of Gameplay Tag changes

In this solution the Listener is polling if the Target Actor has Gameplay Tag changes.

Pro:

• Easy to understand (even for gamedesigners, no need to understand GAS at all)
• Easy to use because the Target only needs to implement IGameplayTagAssetInterface (one GameplayTagContainer is enough).

Con:

• Polling is always less performant than reacting to events, use only if solution 2 is not an option
• To prevent unnecessary polling, it is recommended to use this solution with other limiting additions e.g. low frequency, only in a trigger area, only for a some time or only close to the player.

Solution 2: Receive Gameplay Tag change events based on AbilitySystemComponent (ASC)

In this solution the Listener is subscribed to gameplay tag change events on the Target Actor through the Target's AbilitySystemComponent.

Pro:

• Event based so performance is better

Con:

• Target actor needs to have an AbilitySystemComponent
• Needs additional ASC, GE setups
• Harder to understand for gamedesigners
• If we want to listen to count change events we need to specify the gameplay tag which can be a limitation