How to use a trace to pickup Objects

Development Programming & Scripting
3

You need some error checking in your code so it doesn’t crash:

if (Trace(HitActor, this, StartofTrace, EndofTrace))
 {
     SelectedActor = HitActor.GetActor();
     if(SelectedActor) { // you don't necessarily hit an actor
          APickUp* TestPickup = Cast<APickUp>(SelectedActor);
          if(TestPickup) { // Actor hit is not necessarily of type 'APickUp' or derived from it
               AFlashLightBattery* const FlashLightBatteryPU = Cast<AFlashLightBattery>(SelectedActor);
               if(FlashLightBatteryPU) { // 'APickUp' might not be a 'AFlashlightBattery'
                    if (!TestPickup->IsPendingKill() && TestPickup->IsActive())
                    {
                        TestPickup->OnPickedUp();
                        TestPickup->SetActive(false);
                        FlashLightBatteryPU->UpdateFlashLightBatteryLevel(this);
                    }
               }
          }
     }
 }