Slick Forums

Are you by any chance running artemis in a multithreaded environment? It appears to be a thread issue, alternatively entity has a faulty hashcode implementation (only if you've extended Entity).

I seem to remember that there used to be some problem with GroupManager in the past, but I might be mistaken. Regardless, you shouldn't run vanilla artemis - it has too many bugs that were never fixed. There are several forks that fix all bugs present in vanilla. Gdx-artemis and mine (artemis-odb) fix these; there are other forks too, but I'm not sure to what degree they remedy the bugs.

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: bytecode-weaving antiboilerplate lib for artemis. | : bugfixing and performance optimized fork.

It looks like it is a threading issue. I can resolve it by pooling the group adds and entity spawns until the end of the world processing function. I have not overridden or extended entity.

I think I might have taken a look at your implementation a while back, but didn't use it since I wasn't sure how to use the Maven repository with gradle, but I'll pull a jar and try again. Should be a drop-in replacement, ja?

Do you run multiple threads in your game? Artemis is single threaded, so when dealing with multiple threads you need to synchronize, or better compartmentalize, access to artemis - if that is the case.

Vanilla artemis was a little flaky when it came to creating entities during an ongoing process loop. Sounds like it might be what's causing it, though I don't remember seeing your particular problem. Worth a short anyway.

The Underkeep and Naturually Selected 2d both use gradle - they're too.
- https://github.com/DaanVanYperen/naturally-selected-2d
- https://github.com/DaanVanYperen/underkeep

Edit: artemis-odb should be fully API-compatible with vanilla (up until when/if artemis-odb 1.0.0 is released - but I'd rather avoid breaking compatibility).

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: bytecode-weaving antiboilerplate lib for artemis. | : bugfixing and performance optimized fork.

You don't need to grab it from maven repo directly; I'm not familiar with gradle but it looks like you've placed the artemis jars inside 'libs/'?

Version 0.6.0 is just around the corner btw; only thing remaining is writing some documentation - I don't expect any more commits before release. The snapshot url is: https://oss.sonatype.org/content/reposi ... -SNAPSHOT/

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: bytecode-weaving antiboilerplate lib for artemis. | : bugfixing and performance optimized fork.