generating stores at init time

encompass-cs/Collections/ComponentStore.cs

@@ -15,13 +15,19 @@ namespace Encompass
             }
         }
 
-        private TypedComponentStore<TComponent> Lookup<TComponent>() where TComponent : struct, IComponent
+        public void RegisterComponentType<TComponent>() where TComponent : struct, IComponent
         {
             if (!Stores.ContainsKey(typeof(TComponent)))
             {
+                System.Console.WriteLine("register component type in component store");
                 var store = new TypedComponentStore<TComponent>();
                 Stores.Add(typeof(TComponent), store);
             }
+        }
+
+        private TypedComponentStore<TComponent> Lookup<TComponent>() where TComponent : struct, IComponent
+        {
+            //RegisterComponentType<TComponent>();
             return Stores[typeof(TComponent)] as TypedComponentStore<TComponent>;
         }
 

encompass-cs/ComponentManager.cs

@@ -17,6 +17,11 @@ namespace Encompass
             this.componentUpdateManager = componentUpdateManager;
         }
 
+        public void RegisterComponentType<TComponent>() where TComponent : struct, IComponent
+        {
+            componentStore.RegisterComponentType<TComponent>();
+        }
+
         internal void SetComponentStore(ComponentStore componentStore)
         {
             this.componentStore.SwapWith(componentStore);

encompass-cs/ComponentUpdateManager.cs

@@ -13,6 +13,13 @@ namespace Encompass
 
         public ComponentStore UpToDateComponentStore { get; private set; } = new ComponentStore();
 
+        public void RegisterComponentType<TComponent>() where TComponent : struct, IComponent
+        {
+            existingAndPendingComponentStore.RegisterComponentType<TComponent>();
+            existingComponentStore.RegisterComponentType<TComponent>();
+            pendingComponentStore.RegisterComponentType<TComponent>();
+        }
+
         internal void Clear()
         {
             existingAndPendingComponentStore.ClearAll();

encompass-cs/DrawLayerManager.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using Encompass.Exceptions;
 
 namespace Encompass
 {
@@ -15,26 +16,32 @@ namespace Encompass
 
         public IEnumerable<int> LayerOrder { get { return layerOrder.Values; } }
 
-        public void RegisterGeneralRendererWithLayer(GeneralRenderer renderer, int layer)
+        public void RegisterDrawLayer(int layer)
         {
-            if (layerIndexToGeneralRenderers.ContainsKey(layer))
+            if (!layerIndexToComponentStore.ContainsKey(layer))
-            {
-                var set = layerIndexToGeneralRenderers[layer];
-                set.Add(renderer);
-            }
-            else
-            {
-                var set = new HashSet<GeneralRenderer>();
-                layerIndexToGeneralRenderers.Add(layer, set);
-                set.Add(renderer);
-            }
-
-            if (!layerOrder.ContainsKey(layer))
             {
                 layerOrder.Add(layer, layer);
+                layerIndexToGeneralRenderers.Add(layer, new HashSet<GeneralRenderer>());
+                layerIndexToComponentStore.Add(layer, new ComponentStore());
             }
         }
 
+        public void RegisterOrderedDrawable<TComponent>() where TComponent : struct, IComponent
+        {
+            typeToEntityToLayer.Add(typeof(TComponent), new Dictionary<Entity, int>(128));
+            foreach (var pair in layerIndexToComponentStore)
+            {
+                pair.Value.RegisterComponentType<TComponent>();
+            }
+        }
+
+        public void RegisterGeneralRendererWithLayer(GeneralRenderer renderer, int layer)
+        {
+            RegisterDrawLayer(layer);
+            var set = layerIndexToGeneralRenderers[layer];
+            set.Add(renderer);
+        }
+
         public void UnregisterGeneralRendererWithLayer(GeneralRenderer renderer, int layer)
         {
             if (layerIndexToGeneralRenderers.ContainsKey(layer))
@@ -51,31 +58,17 @@ namespace Encompass
 
         public void RegisterComponentWithLayer<TComponent>(Entity entity, TComponent component, int layer) where TComponent : struct, IComponent
         {
-            if (!typeToEntityToLayer.ContainsKey(typeof(TComponent)))
+            if (!layerIndexToComponentStore.ContainsKey(layer))
             {
-                typeToEntityToLayer.Add(typeof(TComponent), new Dictionary<Entity, int>());
+                throw new UndefinedLayerException("Layer {0} is not defined. Use WorldBuilder.RegisterDrawLayer to register the layer.", layer);
             }
 
             if (typeToEntityToLayer[typeof(TComponent)].ContainsKey(entity)) { UnRegisterComponentWithLayer<TComponent>(entity); }
 
-            if (layerIndexToComponentStore.ContainsKey(layer))
+            var set = layerIndexToComponentStore[layer];
-            {
+            set.Set<TComponent>(entity, component);
-                var set = layerIndexToComponentStore[layer];
-                set.Set<TComponent>(entity, component);
-            }
-            else
-            {
-                var set = new ComponentStore();
-                layerIndexToComponentStore.Add(layer, set);
-                set.Set<TComponent>(entity, component);
-            }
 
             typeToEntityToLayer[typeof(TComponent)].Add(entity, layer);
-
-            if (!layerOrder.ContainsKey(layer))
-            {
-                layerOrder.Add(layer, layer);
-            }
         }
 
         public void UnRegisterComponentWithLayer<TComponent>(Entity entity) where TComponent : struct, IComponent

encompass-cs/Exceptions/UndefinedLayerException.cs

@@ -0,0 +1,12 @@
+using System;
+
+namespace Encompass.Exceptions
+{
+    public class UndefinedLayerException : Exception
+    {
+        public UndefinedLayerException(
+            string format,
+            params object[] args
+        ) : base(string.Format(format, args)) { }
+    }
+}

encompass-cs/RenderManager.cs

@@ -17,6 +17,7 @@ namespace Encompass
         public void RegisterOrderedRenderer<TComponent>(Action<Entity, IComponent> renderAction) where TComponent : struct, IComponent
         {
             drawComponentTypeToOrderedRenderer.Add(typeof(TComponent), renderAction);
+            drawLayerManager.RegisterOrderedDrawable<TComponent>();
         }
 
         public void RegisterGeneralRendererWithLayer(GeneralRenderer renderer, int layer)

encompass-cs/WorldBuilder.cs

@@ -35,7 +35,7 @@ namespace Encompass
 
         private readonly HashSet<Engine> senders = new HashSet<Engine>();
 
-        private readonly HashSet<Type> registeredComponentTypes = new HashSet<Type>();
+        private readonly HashSet<Type> componentTypesToRegister = new HashSet<Type>();
 
         public WorldBuilder()
         {
@@ -77,20 +77,28 @@ namespace Encompass
         /// </summary>
         public void SetComponent<TComponent>(Entity entity, TComponent component) where TComponent : struct, IComponent
         {
+            RegisterComponentType<TComponent>();
+
             startingComponentStoreForComponentManager.Set(entity, component);
             startingComponentStoreForComponentUpdateManager.Set(entity, component);
 
-            RegisterComponent(typeof(TComponent));
-
             if (component is IDrawableComponent drawableComponent)
             {
                 componentManager.RegisterDrawableComponent(entity, component, drawableComponent.Layer);
             }
         }
 
-        internal void RegisterComponent(Type componentType)
+        internal void RegisterComponentType<TComponent>() where TComponent : struct, IComponent
         {
-            registeredComponentTypes.Add(componentType);
+            componentManager.RegisterComponentType<TComponent>();
+            componentUpdateManager.RegisterComponentType<TComponent>();
+            startingComponentStoreForComponentManager.RegisterComponentType<TComponent>();
+            startingComponentStoreForComponentUpdateManager.RegisterComponentType<TComponent>();
+        }
+
+        internal void AddComponentTypeToRegister(Type componentType)
+        {
+            componentTypesToRegister.Add(componentType);
         }
 
         /// <summary>
@@ -128,7 +136,7 @@ namespace Encompass
 
             foreach (var componentType in engine.readTypes.Union(engine.writeTypes).Union(engine.readPendingTypes))
             {
-                 RegisterComponent(componentType);
+                AddComponentTypeToRegister(componentType);
             }
 
             foreach (var receiveType in engine.receiveTypes.Union(engine.readPendingTypes))
@@ -144,6 +152,15 @@ namespace Encompass
             return engine;
         }
 
+        /// <summary>
+        /// Registers a draw layer. This must be done before any Renderers are registered.
+        /// </summary>
+        /// <param name="layer">The draw layer to register.</param>
+        public void RegisterDrawLayer(int layer)
+        {
+            drawLayerManager.RegisterDrawLayer(layer);
+        }
+
         /// <summary>
         /// Adds the specified OrderedRenderer to the World.
         /// </summary>
@@ -319,8 +336,12 @@ namespace Encompass
 
             var engineOrder = new List<Engine>();
 
-            foreach (var registeredComponentType in registeredComponentTypes)
+            foreach (var registeredComponentType in componentTypesToRegister)
             {
+                var method = typeof(WorldBuilder).GetMethod("RegisterComponentType", BindingFlags.NonPublic | BindingFlags.Instance);
+                var generic = method.MakeGenericMethod(registeredComponentType);
+                generic.Invoke(this, null);
+
                 var emitterEngine = (Engine)Activator.CreateInstance(typeof(ComponentEmitter<>).MakeGenericType(registeredComponentType));
                 AddEngine(emitterEngine);
                 engineOrder.Add(emitterEngine);