POC for entities.

Game/Entity/EntityManager.cpp

@@ -0,0 +1,25 @@
+#include <Entity/EntityManager.h>
+
+#include <Entity/Entity.h>
+
+namespace Game
+{
+    namespace
+    {
+        EntityManager Manager;
+    }
+
+    EntityID EntityManager::ID = 0;
+
+    void InitEntityManager() {}
+
+    EntityManager& GetEntityManager()
+    {
+        return Manager;
+    }
+
+    void RegisterEntity(EntityManager& manager, Entity* entity)
+    {
+        entity->ID = EntityManager::ID++;
+    }
+} // namespace Game