1 files changed, 84 insertions, 0 deletions
diff --git a/Plugins/MonoGame.Extended/source/MonoGame.Extended.Entities/World.cs b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Entities/World.cs
new file mode 100644
index 0000000..022d4b8
--- /dev/null
+++ b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Entities/World.cs
@@ -0,0 +1,84 @@
+using Microsoft.Xna.Framework;
+using MonoGame.Extended.Collections;
+using MonoGame.Extended.Entities.Systems;
+
+namespace MonoGame.Extended.Entities
+{
+    public class World : SimpleDrawableGameComponent
+    {
+        private readonly Bag<IUpdateSystem> _updateSystems;
+        private readonly Bag<IDrawSystem> _drawSystems;
+
+        internal World()
+        {
+            _updateSystems = new Bag<IUpdateSystem>();
+            _drawSystems = new Bag<IDrawSystem>();
+
+            RegisterSystem(ComponentManager = new ComponentManager());
+            RegisterSystem(EntityManager = new EntityManager(ComponentManager));
+        }
+
+        public override void Dispose()
+        {
+            foreach (var updateSystem in _updateSystems)
+                updateSystem.Dispose();
+
+            foreach (var drawSystem in _drawSystems)
+                drawSystem.Dispose();
+
+            _updateSystems.Clear();
+            _drawSystems.Clear();
+            
+            base.Dispose();
+        }
+
+        internal EntityManager EntityManager { get; }
+        internal ComponentManager ComponentManager { get; }
+
+        public int EntityCount => EntityManager.ActiveCount;
+
+        internal void RegisterSystem(ISystem system)
+        {
+            // ReSharper disable once ConvertIfStatementToSwitchStatement
+            if (system is IUpdateSystem updateSystem)
+                _updateSystems.Add(updateSystem);
+
+            if (system is IDrawSystem drawSystem)
+                _drawSystems.Add(drawSystem);
+
+            system.Initialize(this);
+        }
+
+        public Entity GetEntity(int entityId)
+        {
+            return EntityManager.Get(entityId);
+        }
+
+        public Entity CreateEntity()
+        {
+            return EntityManager.Create();
+        }
+
+        public void DestroyEntity(int entityId)
+        {
+            EntityManager.Destroy(entityId);
+        }
+
+        public void DestroyEntity(Entity entity)
+        {
+            EntityManager.Destroy(entity);
+        }
+        
+        public override void Update(GameTime gameTime)
+        {
+            foreach (var system in _updateSystems)
+                system.Update(gameTime);
+        }
+
+        public override void Draw(GameTime gameTime)
+        {
+            foreach (var system in _drawSystems)
+                system.Draw(gameTime);
+        }
+    }
+}
+\ No newline at end of file