Is there a way to check if an Entity still exists?

rgbDreamer

<div class="IPBDescription">Attempt to access an object that no longer exists (was type Marine)</div>I've been getting a "Attempt to access an object that no longer exists (was type SquadUplink)" errors. Is there a way to check my reference to see if it still exists? The reference isn't nil and throws an error if I try to index it.

Also, is there a callback reliably called when an Entity stops "existing"? I've tried :OnDestroy(), but I might be doing something else wrong.

Thanks!

player

You are right. An entity's OnDestroy-method is called when said entity is about to be destroyed, so override it to know when this happens. Alternatively, you could keep track of entities by their Id instead (a simple number upward from 1 that is always unique and will not be used again after the entity is destroyed). You may then use Shared.GetEntity( integer EntityId ) to fetch a reference to the actual entity, and if it doesn't exist (anymore) it will probably return nil to tell you this (haven't tried it, speculating).

fsfod

If you doing this in a function you added to the marine class you could use OnEntityChange that gets called when any entity is destroyed or transfered to a new entity

<!--c1--><div class='codetop'>CODE</div><div class='codemain'><!--ec1--> function Marine:OnEntityChange(oldEntityId, newEntityId)

   Player.OnEntityChange(self, oldEntityId, newEntityId)

   if(oldEntityId == self.UplinkId and not newEntityId) then
     //handle uplink being destroyed
   end

end<!--c2--></div><!--ec2-->

Hackepeter

<!--quoteo(post=1883476:date=Nov 3 2011, 06:06 PM:name=player)--><div class='quotetop'>QUOTE (player @ Nov 3 2011, 06:06 PM) <a href="index.php?act=findpost&pid=1883476"><{POST_SNAPBACK}></a></div><div class='quotemain'><!--quotec-->You may then use Shared.GetEntity( integer EntityId ) to fetch a reference to the actual entity, and if it doesn't exist (anymore) it will probably return nil to tell you this (haven't tried it, speculating).<!--QuoteEnd--></div><!--QuoteEEnd-->

Yeah exactly, it returns a nil reference if it can't find a matching entity for that id. I also use that method, imho it's safer then working with a direct reference to a entity across update ticks.