# Auto Injections for [DragonECS](https://github.com/DCFApixels/DragonECS)
| Languages: | [Русский](https://github.com/DCFApixels/DragonECS-AutoInjections/blob/main/README-RU.md) | [English(WIP)](https://github.com/DCFApixels/DragonECS-AutoInjections) |
| :--- | :--- | :--- |
The extension is designed to reduce the amount of code by simplifying dependency injection by doing injections automatically.
> **NOTICE:** The project is a work in progress, API may change.
> While the English version of the README is incomplete, you can view the [Russian version](https://github.com/DCFApixels/DragonECS/blob/main/README-RU.md).
# Code Example
```csharp
class VelocitySystemDI : IEcsRunProcess
{
class Subject : EcsSubjectDI
{
[ExcImplicit(typeof(FreezedTag))]
[Inc] public EcsPool poses;
[Inc] public EcsPool velocities;
}
[EcsInject] EcsDefaultWorld _world;
[EcsInject] TimeService _time;
public void Run(EcsPipeline pipeline)
{
foreach (var e in _world.Where(out Subject s))
{
s.poses.Write(e).position += s.velocities.Read(e).value * _time.DeltaTime;
}
}
}
```
Same code but without AutoInjections
```csharp
class VelocitySystem : IEcsRunProcess, IEcsInject, IEcsInject
{
class Subject : EcsSubject
{
public EcsPool poses;
public EcsPool velocities;
public Subject(Builder b)
{
b.Exclude();
poses = b.Include();
velocities = b.Include();
}
}
EcsDefaultWorld _world;
TimeService _time;
public void Inject(EcsDefaultWorld obj) => _world = obj;
public void Inject(TimeService obj) => _time = obj;
public void Run(EcsPipeline pipeline)
{
foreach (var e in _world.Where(out Subject s))
{
s.poses.Write(e).position += s.velocities.Read(e).value * _time.DeltaTime;
}
}
}
```