lyra-engine/lyra-ecs

Lyra ECS

An ECS for the Lyra game engine.

Why does it exist?

I couldn't find anything that fulfilled my needs, specifically an ECS that can store arbitrary components without knowing about the types. This makes it easier to implement into a scripting engine that has the ability to create its own components.

Features

• Archetypes
  • Spawning entities
  • Despawning entities
    • Delete entities from archetypes
    • Find some way to fill in the gaps in component columns after entities are deleted
      • This was done by moving the last entity in the column to the gap that was just removed.
  • Grow archetype as it fills up
  • Borrow safety of components inside Archetypes
    • Return Ref and RefMut from borrow queries
• Querying components from archetypes
  • Views
  • Mutable views
• Resources
• Get resources in views somehow
• Relationships (maybe this can be done through queries, idk)
• Dynamic queries
  • Needed for scripting engines that can create their own components that Rust does not know the types of.
• Systems
  • Dispatchers/Executors
    • Execution graph that follows dependencies
• Track when components on entities are changed