- Implement `TryGetComponent<T>` in `World` and `SparseSet<T>`
- Add validation to ensure `ForEach` type parameters match the
`QueryDescriptor`
- Improve error handling in `SparseSet<T>.Get` to throw
`InvalidOperationException`
- Use `GUID` instead of `FullName` for `QueryDescriptor` hash stability
- Fix SparseSet resize logic to correctly initialize new slots
- Implement Equals and GetHashCode for QueryDescriptor
- Prevent collection modification exceptions in World.DestroyEntity
- Update CommandQueue to accumulate errors across drain cycles
- Add comprehensive edge case tests in EdgeCaseTests.cs
Introduces a mechanism to store and access singleton components on a
reserved entity. The singleton entity is automatically excluded from
all standard queries to prevent it from being processed like regular
entities.
- Added `SetSingleton`, `GetSingleton`, `HasSingleton`, and
`RemoveSingleton` to `World`.
- Added `RegisterSingleton` to `EntityAllocator` to support the
reserved entity.
- Updated `QueryExecutor` to skip the singleton entity during
iteration.
- Added unit tests for singleton functionality.
Introduces a relationship system to allow entities to point to other
entities. Includes a `Relationship<TSelf, TTarget>` component and a
`RelationshipIndex` to enable efficient reverse lookups (finding all
sources pointing to a specific target).
The `World.DestroyEntity` method now performs cascading removals:
- Relationships where the entity is the source are removed.
- Relationships where the entity is the target are removed from their
respective source entities.
Also adds MessagePack support to `Entity` and `Relationship`.
Introduces a complete query system for iterating over entities with
specific component combinations, including support for "with" and
"without" filters.
Also adds:
- `ISystem` and `ITickedSystem` interfaces for defining logic.
- `SystemGroup` for managing and running groups of systems.
- `QueryBuilder` for a fluent API to construct queries.
- `QueryExecutor` for high-performance iteration using ref parameters.
- `Tick` and `TickType` to support timed and logical updates.
Initializes the OECS repository with the core foundation, including:
- Entity management with 24-bit IDs and 8-bit versioning
- Sparse set-based component storage
- Entity allocation and recycling logic
- Core World API for entity and component lifecycle
- Project scaffolding for source and unit tests
- Design documentation and architecture decision records (ADRs)
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