byke is an Entity Component System (ECS) library for Go, inspired by the Bevy API.

Although still under development, it already includes a wide range of features. Documentation and examples will improve in the near feature.

• Schedules and SystemSets: Organize systems and define execution order.

• Resources: Inject shared data into systems.

• Queries: Supports filters like With, Without, Added, and Changed. Also supports Option[T] and OptionMut[T].

• Events: Use EventWriter[E] and EventReader[E] to send and receive events.

• States: Manage application state with State[S] and NextState[S].

  • Supports OnEnter(state) and OnExit(state) schedules.
  • Emits StateTransitionEvent[S] during transitions.
  • Allows state-scoped entities via DespawnOnExitState(TitleScreen).

• Commands: Spawn/despawn entities and add/remove components.

• Type Safety: Avoids the need for type assertions like value.(MyType).

• Entity Hierarchies: Support for parent-child relationships between entities.

The bykebiten package provides basic integration with Ebitengine:

• Starts and manages a game loop
• Provides resources for window config, screen size, mouse input, and more
• Handles sprite rendering with support for z-ordering, anchor points, and custom sizes
• Propagates transforms through the entity hierarchy

Check out the examples for a look at how everything comes together.

Note: This README and some documentation was refined using generative AI, but all code in this project is handwritten.