AI sight sense expiration not working

Development Programming & Scripting AI
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In my case, the max age of sight sense is set to 4 seconds. I can see in the debugger that once my character is spotted by a bot, the age of sight sense is being counted, and once it reaches 4 seconds, the sight sense sphere disappears. But how come the function OnPerceptionUpdated() is never notified of this expiration event? Is this a bug?

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Workaround

  • Subclass UAIPerceptionComponent (e.g. UMyAIPerceptionComponent) and override virtual void HandleExpiredStimulus(FAIStimulus& StimulusStore) override. Put your desired logic inside this function. As an aside, the API documentation mentions that it is not necessary to call Super::HandleExpiredStimulus().
  • In AAIController subclass (e.g. AMyAIController) constructor, create suboject of UMyAIPerceptionComponent.
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