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Slick Forums :: View topic - NPE accessing component after it being deleted i prev system
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NPE accessing component after it being deleted i prev system
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Author:  SineNomine [ Wed Sep 25, 2013 1:46 pm ]
Post subject:  NPE accessing component after it being deleted i prev system


Author:  junkdog [ Sat Sep 28, 2013 8:10 pm ]
Post subject:  Re: NPE accessing component after it being deleted i prev sy

Thanks, I've always coded around said problem - thinking I'd investigate the cause some other time. I've updated the artemis fork I maintain - since the main artemis repo doesn't appear to be actively maintained anymore - I thought I'd mention it here.

Author:  SineNomine [ Sun Sep 29, 2013 9:42 am ]
Post subject:  Re: NPE accessing component after it being deleted i prev sy

I'm also wondering if the call to Entity:changedInWorld() couldn't be done automatically by the add/removeComponent() methods. The only thing that changedInWorld() does is to add a reference to the entity in World.changed. Unless you add/remove huge amounts of components to your entities every frame, I don't think it'll be much of an performance impact.

I'm also working on my own version of Artemis. And I think it would be nice if you could just add/remove components/entities and have it work without having to call extra methods or checking for null pointers.

Author:  junkdog [ Sun Sep 29, 2013 11:13 am ]
Post subject:  Re: NPE accessing component after it being deleted i prev sy


Author:  SineNomine [ Mon Sep 30, 2013 5:31 am ]
Post subject:  Re: NPE accessing component after it being deleted i prev sy

No it's not, I'm afraid. But it's basically your fork with just a couple of tiny changes. Eg. I added a name field to entities in order to quickly find out what kind of entity it is when debugging.

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