rs-ecs

A reasonably simple entity component system (ECS) developed for use in the simulation models of project group EcoEpi at the Helmholtz Centre for Environmental Research. The design is based on hecs but has a significantly reduced API surface.

It also has a few changes and additions specific to our use case:

• It is not thread-safe as the execution of single-threaded simulations is trivially deterministic. Additionally, running multiple instances of these in parallel often gives the highest throughput.
• It supports amortised random access to query results by entity identifier using the QueryRef::map method. This can be useful to efficiently traverse graph-like relations between entities.
• Entities can be transferred between worlds without serialisation using the World::transfer method. We use this to completely remove entities from the simulation while keeping their full dynamic state around for later inspection.

License

Licensed under

• Apache License, Version 2.0 or
• MIT license

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.