+ systems

README.md

@@ -154,6 +154,52 @@ ecs.Filter<Not<Disabled>>()
 	.Query((EntityView entity) => { });
 ```
 
+Systems
+
+```csharp
+using var ecs = new World();
+
+// Declare a system manager
+var systems = new SystemManager(ecs);
+
+// Bind your systems. You can bind one system per type!
+var moveSystem = systems.Add<MoveSystem>("My optional name");
+
+// Update all systems to this system manager
+systems.Update();
+
+// You can disable a system
+moveSystem.Disable();
+
+// ... and enable it
+moveSystem.Enable();
+
+// Delete
+systems.Delete<MoveSystem>();
+
+// Find a system to do some fancy stuff
+var foundSystem = systems.Find<MoveSystem>();
+
+
+
+sealed class MoveSystem : EcsSystem {
+	public override void OnCreate() {
+		Ecs.Entity()
+			.Set<Position>(new () { X = 0, Y = 0})
+			.Set<Velocity>(new () { X = 12.0f, Y = 1f });
+	}
+
+	public override void OnUpdate() {
+		var deltaTime = Time.Delta;
+		Ecs.Query((ref Position pos, ref Velocity vel) => {
+			pos.X += vel.X * deltaTime;
+			pos.Y += vel.Y * deltaTime;
+		});
+	}
+}
+
+```
+
 # Credits
 
 Base code idea inspired by:

plugins/TinyEcs.Plugins/Systems.cs

@@ -2,10 +2,12 @@
 
 namespace TinyEcs;
 
-public abstract class System
+public abstract class EcsSystem
 {
+#nullable disable
 	[NotNull] public World Ecs { get; internal set; }
 	[NotNull] public string Name { get; internal set; }
+#nullable restore
 
 	public bool IsEnabled { get; private set; } = true;
 	internal bool IsDestroyed { get; set; }
@@ -35,11 +37,11 @@ public virtual void OnDestroy() { }
 
 	private void Enable(bool enable)
 	{
-		var tmp = IsEnabled;
-		IsEnabled = enable;
-		if (tmp == enable)
+		if (IsEnabled == enable)
 			return;
 
+		IsEnabled = enable;
+
 		if (enable)
 			OnStart();
 		else
@@ -51,27 +53,27 @@ private void Enable(bool enable)
 public sealed class SystemManager
 {
 	private readonly World _ecs;
-	private readonly List<System> _systems, _toCreate, _toDelete;
-	private readonly Dictionary<Type, System> _hashes;
+	private readonly List<EcsSystem> _systems, _toCreate, _toDelete;
+	private readonly Dictionary<Type, EcsSystem> _hashes;
 
 	public SystemManager(World ecs)
 	{
 		_ecs = ecs;
-		_hashes = new Dictionary<Type, System>();
-		_systems = new List<System>();
-		_toCreate = new List<System>();
-		_toDelete = new List<System>();
+		_hashes = new Dictionary<Type, EcsSystem>();
+		_systems = new List<EcsSystem>();
+		_toCreate = new List<EcsSystem>();
+		_toDelete = new List<EcsSystem>();
 	}
 
-	public T Add<T>(string name = "") where T : System, new()
+	public T Add<T>(string name = "") where T : EcsSystem, new()
 	{
 		if (_hashes.TryGetValue(typeof(T), out var system))
 			return (T)system;
 
 		system = new T
 		{
 			Ecs = _ecs,
-			Name = string.IsNullOrWhiteSpace(name) ? typeof(T).Name : name
+			Name = string.IsNullOrWhiteSpace(name) ? typeof(T).ToString() : name
 		};
 
 		_hashes.Add(typeof(T), system);
@@ -81,7 +83,7 @@ public SystemManager(World ecs)
 		return (T)system;
 	}
 
-	public void Delete<T>() where T : System
+	public void Delete<T>() where T : EcsSystem
 	{
 		var found = Find<T>();
 		if (found == null || found.IsDestroyed) return;
@@ -93,7 +95,7 @@ public void Delete<T>() where T : System
 		}
 	}
 
-	public T? Find<T>() where T : System
+	public T? Find<T>() where T : EcsSystem
 	{
 		_ = _hashes.TryGetValue(typeof(T), out var system);
 		return system as T;
@@ -136,7 +138,6 @@ public void Update()
 			sys.OnUpdate();
 			sys.OnAfterUpdate();
 		}
-
 	}
 
 	public void Clear()
@@ -146,5 +147,6 @@ public void Clear()
 		_systems.ForEach(s => s.OnDestroy());
 		_systems.Clear();
 		_toDelete.Clear();
+		_hashes.Clear();
 	}
 }

samples/MyBattleground/Program.cs

@@ -8,8 +8,9 @@
 
 using var ecs = new World();
 var systems = new SystemManager(ecs);
-systems.Add<MoveSystem>();
+var ff = systems.Add<MoveSystem>();
 
+Console.WriteLine("system name : {0}", ff.Name);
 
 var e = ecs.Entity("Main")
 	.Set<Position>(new Position() {X = 2})
@@ -191,7 +192,7 @@ struct Chunk;
 struct ChunkTile;
 
 
-sealed class MoveSystem : TinyEcs.System
+sealed class MoveSystem : EcsSystem
 {
 	public override void OnCreate()
 	{

samples/TinyEcsGame/Program.cs

@@ -64,7 +64,7 @@ struct Rotation
 }
 
 
-sealed class MoveSystem : TinyEcs.System
+sealed class MoveSystem : TinyEcs.EcsSystem
 {
 	public override void OnUpdate()
 	{
@@ -78,7 +78,7 @@ public override void OnUpdate()
 	}
 }
 
-sealed class CheckBorderSystem : TinyEcs.System
+sealed class CheckBorderSystem : TinyEcs.EcsSystem
 {
 	public Vector2 WindowSize { get; set; }
 
@@ -111,7 +111,7 @@ public override void OnUpdate()
 	}
 }
 
-sealed class BeginRenderSystem : TinyEcs.System
+sealed class BeginRenderSystem : TinyEcs.EcsSystem
 {
 	public override void OnUpdate()
 	{
@@ -120,15 +120,15 @@ public override void OnUpdate()
 	}
 }
 
-sealed class EndRenderSystem : TinyEcs.System
+sealed class EndRenderSystem : TinyEcs.EcsSystem
 {
 	public override void OnUpdate()
 	{
 		Raylib.EndDrawing();
 	}
 }
 
-sealed class RenderEntities : TinyEcs.System
+sealed class RenderEntities : TinyEcs.EcsSystem
 {
 	public override void OnUpdate()
 	{
@@ -139,7 +139,7 @@ public override void OnUpdate()
 	}
 }
 
-sealed class RenderText : TinyEcs.System
+sealed class RenderText : TinyEcs.EcsSystem
 {
 	public override void OnUpdate()
 	{
@@ -157,7 +157,7 @@ public override void OnUpdate()
 	}
 }
 
-sealed class SpawnEntities : TinyEcs.System
+sealed class SpawnEntities : TinyEcs.EcsSystem
 {
 	public int EntitiesToSpawn { get; set; }
 	public Vector2 WindowSize { get; set; }