Renamed vars and added some comments.

include/Engine/Core/SystemPipeline.h

@@ -24,12 +24,13 @@ public:
     }
 
     template <typename T, typename... Arguments>
-    void AddSystem(int updateOrderPriority, Arguments... args)
+    //All systems with orderlevel 0 will be updated first, then 1, 2, etc.
+    void AddSystem(int updateOrderLevel, Arguments... args)
     {
-        if (updateOrderPriority + 1 > m_OrderedSystemGroups.size()) {
-            m_OrderedSystemGroups.resize(updateOrderPriority + 1);
+        if (updateOrderLevel + 1 > m_OrderedSystemGroups.size()) {
+            m_OrderedSystemGroups.resize(updateOrderLevel + 1);
         }
-        UnorderedSystems& group = m_OrderedSystemGroups[updateOrderPriority];
+        UnorderedSystems& group = m_OrderedSystemGroups[updateOrderLevel];
         System* system = new T(m_EventBroker, args...);
         group.Systems[typeid(T).name()] = system;
 

src/Engine/Collision/CollisionSystem.cpp

@@ -4,8 +4,6 @@
 
 void CollisionSystem::UpdateComponent(World * world, ComponentWrapper & cAABB, double dt)
 {
-    //TODO: Update CollisionSystem system after PlayerSystem.
-
     //Right now, cAABB is a component attached to any entity that should be collideable.
     AABB thisBox;
     if (!Collision::GetEntityBox(world, cAABB, thisBox)) {

src/Game/Game.cpp

@@ -52,15 +52,17 @@ Game::Game(int argc, char* argv[])
 
     // Create system pipeline
     m_SystemPipeline = new SystemPipeline(m_EventBroker);
-    unsigned int updateOrderPriority = 0;
-    m_SystemPipeline->AddSystem<RaptorCopterSystem>(updateOrderPriority);
-    m_SystemPipeline->AddSystem<PlayerSystem>(updateOrderPriority);
-    m_SystemPipeline->AddSystem<EditorSystem>(updateOrderPriority, m_Renderer);
+
+    //All systems with orderlevel 0 will be updated first.
+    unsigned int updateOrderLevel = 0;
+    m_SystemPipeline->AddSystem<RaptorCopterSystem>(updateOrderLevel);
+    m_SystemPipeline->AddSystem<PlayerSystem>(updateOrderLevel);
+    m_SystemPipeline->AddSystem<EditorSystem>(updateOrderLevel, m_Renderer);
 
     //Collision and TriggerSystem should update after player.
-    ++updateOrderPriority;
-    m_SystemPipeline->AddSystem<CollisionSystem>(updateOrderPriority);
-    m_SystemPipeline->AddSystem<TriggerSystem>(updateOrderPriority);
+    ++updateOrderLevel;
+    m_SystemPipeline->AddSystem<CollisionSystem>(updateOrderLevel);
+    m_SystemPipeline->AddSystem<TriggerSystem>(updateOrderLevel);
 
     m_LastTime = glfwGetTime();