DoN's 3D Pathfinding for Flying A.I. [Support Thread]

Distribution UE Marketplace
55

Got a little treat to share for any of you working w/ large levels & large AI counts. Enables/Disables AI processes, as needed. This saved me about 4.6ms:


void APFAIController::UpdateAIProcessCulling()
{
    if (PFCPawn.IsValid())
    {
        APFGameState* PFGS = Cast<APFGameState>(GetWorld()->GetGameState());

        // Check nearest enemy distance (not just player locations cause AI fight other AI)
        TArray<APFCharacter*> enemyList;
        PFGS->GetEnemyPawns(this, enemyList);
        float closestDistSq = BIG_NUMBER;
        for (int i = 0; i < enemyList.Num(); ++i)
        {
            const float distSq = (PFCPawn->GetActorLocation() - enemyList*->GetActorLocation()).SizeSquared();
            if (distSq < closestDistSq)
            {
                closestDistSq = distSq;
            }
        }

        const bool bWantsKillProcesses = !PFCPawn->WasRecentlyRendered() && closestDistSq > FMath::Square(processCullingDistance);
        if (IsActorTickEnabled() == bWantsKillProcesses)
        {
            // Enable/Disable movement component
            UPFCharacterMovementComponent* PFCMC = PFCPawn->GetPFCharacterMovement();
            if (PFCMC->MovementMode != EMovementMode::MOVE_None)
            {
                PFCMC->SetActive(!bWantsKillProcesses);
                PFCMC->SetComponentTickEnabled(!bWantsKillProcesses);
            }

            // Enable/Disable sight/sound/damage senses
            GetAIPerceptionComponent()->SetActive(!bWantsKillProcesses);
            GetAIPerceptionComponent()->SetComponentTickEnabled(!bWantsKillProcesses);

            SetBehaviorTreePaused(bWantsKillProcesses);

            // For good measure, kill weapon tick, too...
            AWeapon* equippedWeapon = PFCPawn->Inventory->GetEquippedWeapon();
            if (equippedWeapon != nullptr)
            {
                equippedWeapon->SetActorTickEnabled(!bWantsKillProcesses);
            }

            // Controller & pawn should both get their ticks updated
            SetActorTickEnabled(!bWantsKillProcesses);
            PFCPawn->SetActorTickEnabled(!bWantsKillProcesses);
        }
    }
}