apsu-core

A toy Entity-Component System for game programming, implemented in (journeyman-level) Scala, loosely inspired by Adam Martin's Entity System RDBMS Beta - Java.

For a (functional but only partially finished) demonstration project, see apsu-demo-scala.

Notable features

• Uses Scala TypeTags to identify component types, allowing a fairly simple syntax: entityMgr.get[SomeComponent](entity)
• Provides convenience methods for iterating over components in a functional style
• Allows any object to be used as a component (no Component interface), so long as it isn't an Entity (a restriction that isn't strictly necessary but seems likely to prevent bugs)
• Since System isn't a reserved word in Scala, Systems extend apsu.core.System. (Note though that in the rare case you want java.lang.System you'll have to use the fully qualified name.)
• Does not allow you to access components via their entities -- if you want components, you'll need to go to the EntityManager for them. Entity is just a case class wrapper around a UUID.
• Doesn't provide an EntityManager.freeze() method (though it'd be trivial to add one if you needed it)
• Not optimized

Name

In Mesopotamian mythology, Apsu is the primordial freshwater ocean below the earth.

License

MIT; see LICENSE.txt