UniqueEntity plugin

plugins/TinyEcs.Plugins/Relationship.cs

@@ -47,13 +47,10 @@ public static class RelationshipPlugin
 {
 	[ModuleInitializer]
 	internal static void ModuleInit()
-	{
-		// nop, this trigger the static ctor
-	}
-
-	static RelationshipPlugin()
 	{
 		World.OnPluginInitialization += world => {
+			world.Component<Parent>();
+			world.Component<Child>();
 			world.OnEntityDeleted += e => e.ClearChildren();
 		};
 	}

plugins/TinyEcs.Plugins/UniqueEntity.cs

@@ -0,0 +1,47 @@
+using System.Runtime.CompilerServices;
+
+namespace TinyEcs;
+
+public readonly struct Identity
+{
+	public readonly string Value;
+
+	internal Identity(string value) => Value = value;
+}
+
+public static class UniqueEntityPlugin
+{
+	[ModuleInitializer]
+	internal static void ModuleInit()
+	{
+		World.OnPluginInitialization += world => {
+			// initialize the entity component
+			world.Component<Identity>();
+		};
+	}
+
+	public static EntityView Entity(this World world, string name)
+	{
+		if (string.IsNullOrWhiteSpace(name))
+			return world.Entity();
+
+		var found = EntityView.Invalid;
+		world.Query((EntityView entity, ref Identity identity) => {
+			if (identity.Value?.Equals(name) ?? false)
+				found = entity;
+		});
+
+		if (found.ID != 0)
+			return found;
+
+		return world.Entity().Set(new Identity(name));
+	}
+
+	public static string Name(this EntityView entity)
+	{
+		if (!entity.Has<Identity>())
+			return $"{entity.ID}";
+
+		return entity.Get<Identity>().Value ?? string.Empty;
+	}
+}

samples/MyBattleground/Program.cs

@@ -15,7 +15,7 @@
 
 ecs.Filter<(Position, Velocity)>()
 	.Query((EntityView entity) => {
-		Console.WriteLine(entity);
+		Console.WriteLine(entity.Name());
 	});
 
 
@@ -38,39 +38,39 @@
 }
 
 ecs.Filter<(With<Child>, With<Parent>)>().Query((EntityView entity, ref Relationship relation) => {
-	Console.WriteLine("im [{0}] a child of {1}, but also having {2} children", entity, ecs.Entity(relation.Parent), relation.Count);
+	Console.WriteLine("im [{0}] a child of {1}, but also having {2} children", entity.Name(), ecs.Entity(relation.Parent).Name(), relation.Count);
 });
 
 Console.WriteLine();
 
 ecs.Filter<With<Parent>>().Query((EntityView entity, ref Relationship relation) => {
-	Console.WriteLine("parent {0} has {1} children", entity, relation.Count);
+	Console.WriteLine("parent {0} has {1} children", entity.Name(), relation.Count);
 
 	foreach (var id in entity.Children())
 	{
-		Console.WriteLine("\tChild: {0}", ecs.Entity(id));
+		Console.WriteLine("\tChild: {0}", ecs.Entity(id).Name());
 	}
 });
 
 Console.WriteLine();
 
 e.RemoveChild(child);
 ecs.Filter<With<Parent>>().Query((EntityView entity, ref Relationship relation) => {
-	Console.WriteLine("parent {0} has {1} children", entity, relation.Count);
+	Console.WriteLine("parent {0} has {1} children", entity.Name(), relation.Count);
 });
 
 Console.WriteLine();
 
 child2.RemoveChild(child3);
 ecs.Filter<With<Parent>>().Query((EntityView entity, ref Relationship relation) => {
-	Console.WriteLine("parent {0} has {1} children", entity, relation.Count);
+	Console.WriteLine("parent {0} has {1} children", entity.Name(), relation.Count);
 });
 
 Console.WriteLine();
 
 e.ClearChildren();
 ecs.Filter<With<Parent>>().Query((EntityView entity, ref Relationship relation) => {
-	Console.WriteLine("parent {0} has {1} children", entity.ID, relation.Count);
+	Console.WriteLine("parent {0} has {1} children", entity.Name(), relation.Count);
 });
 
 e.Delete();
@@ -83,9 +83,9 @@
 	ecs.Entity()
 		 .Set<Position>(new Position())
 		 .Set<Velocity>(new Velocity())
-		 .Set<PlayerTag>()
-		 .Set<Dogs>()
-		 .Set<Likes>()
+		//  .Set<PlayerTag>()
+		//  .Set<Dogs>()
+		//  .Set<Likes>()
 		 ;
 
 var sw = Stopwatch.StartNew();
@@ -108,19 +108,19 @@
 		// {
 		// 	var column0 = archetype.GetComponentIndex<Position>();
 		// 	var column1 = archetype.GetComponentIndex<Velocity>();
-		
+
 		// 	foreach (ref readonly var chunk in archetype)
 		// 	{
 		// 		ref var pos = ref chunk.GetReference<Position>(column0);
 		// 		ref var vel = ref chunk.GetReference<Velocity>(column1);
-		
+
 		// 		ref var last2 = ref Unsafe.Add(ref pos, chunk.Count);
-		
+
 		// 		while (Unsafe.IsAddressLessThan(ref pos, ref last2))
 		// 		{
 		// 			pos.X *= vel.X;
 		// 			pos.Y *= vel.Y;
-		
+
 		// 			pos = ref Unsafe.Add(ref pos, 1);
 		// 			vel = ref Unsafe.Add(ref vel, 1);
 		// 		}

src/EntityView.cs

@@ -19,7 +19,6 @@ internal EntityView(World world, EcsID id)
         ID = id;
     }
 
-	public string Name => ToString();
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public readonly bool Equals(EcsID other) => ID == other;
@@ -93,8 +92,6 @@ public readonly EntityView Disable()
 
     public readonly bool IsEnabled() => !Has<EcsDisabled>();
 
-	public override string ToString() => World.GetRecord(ID).Name ?? $"{ID}";
-
 
 	public static implicit operator EcsID(EntityView d) => d.ID;
 

src/World.cs

@@ -11,7 +11,6 @@ public sealed partial class World : IDisposable
     private readonly Archetype _archRoot;
     private readonly EntitySparseSet<EcsRecord> _entities = new();
     private readonly DictionarySlim<ulong, Archetype> _typeIndex = new();
-	private readonly Dictionary<string, EcsID> _entityNames = new();
     private Archetype[] _archetypes = new Archetype[16];
     private int _archetypeCount;
     private readonly ComponentComparer _comparer;
@@ -54,7 +53,6 @@ public void Dispose()
         _archRoot.Clear();
         _typeIndex.Clear();
         _commands.Clear();
-		_entityNames.Clear();
 
         Array.Clear(_archetypes, 0, _archetypeCount);
         _archetypeCount = 0;
@@ -75,7 +73,7 @@ static void InternalOptimize(Archetype root)
         }
     }
 
-    internal unsafe ref readonly EcsComponent Component<T>() where T : struct
+    public unsafe ref readonly EcsComponent Component<T>() where T : struct
 	{
         ref readonly var lookup = ref Lookup.Component<T>.Value;
 
@@ -117,19 +115,19 @@ internal unsafe ref readonly EcsComponent Component<T>() where T : struct
         return ref lookup;
     }
 
-    public EntityView Entity(string name)
-    {
-		_entityNames.TryGetValue(name, out var id);
+    // public EntityView Entity(string name)
+    // {
+	// 	_entityNames.TryGetValue(name, out var id);
 
-        var entity = Entity(id);
-		if (id == 0)
-		{
-			_entityNames.Add(name, entity.ID);
-			GetRecord(entity.ID).Name = name;
-		}
+    //     var entity = Entity(id);
+	// 	if (id == 0)
+	// 	{
+	// 		_entityNames.Add(name, entity.ID);
+	// 		GetRecord(entity.ID).Name = name;
+	// 	}
 
-		return entity;
-    }
+	// 	return entity;
+    // }
 
     public EntityView Entity(EcsID id = default)
     {
@@ -169,9 +167,6 @@ public void Delete(EcsID entity)
         EcsAssert.Assert(removedId == entity);
 
         _entities.Remove(removedId);
-
-		if (!string.IsNullOrEmpty(record.Name))
-			_entityNames.Remove(record.Name);
     }
 
     public bool Exists(EcsID entity)
@@ -679,7 +674,6 @@ struct EcsRecord
 {
 	public Archetype Archetype;
     public int Row;
-	public string? Name;
 
     public readonly ref ArchetypeChunk GetChunk() => ref Archetype.GetChunk(Row);
 }