Copying and Pasting cs Code

In cs, like in almost any computer programming language, reading data from a file can be tricky. You add extra lines of code to tell the computer what to do. Sometimes you can copy and paste these lines from other peoples’ code.

For example, you can follow the pattern in this listing:

     internal static void HierarchyChange()
     {
         if (Application.isPlaying)
         {
             //Debug.Log("HierarchyChange ignored, while running.");
             CheckSceneForStuckHandlers = true; // done once AFTER play mode.
             return;
         }

         if (CheckSceneForStuckHandlers)
         {
             CheckSceneForStuckHandlers = false;
             PhotonNetwork.InternalCleanPhotonMonoFromSceneIfStuck();
         }

         HashSet pvInstances = new HashSet();
         HashSet usedInstanceViewNumbers = new HashSet();
         bool fixedSomeId = false;

         //// the following code would be an option if we only checked scene objects (but we can check all PVs)
         //PhotonView[] pvObjects = GameObject.FindSceneObjectsOfType(typeof(PhotonView)) as PhotonView[];
         //Debug.Log("HierarchyChange. PV Count: " + pvObjects.Length);

         string levelName = Application.loadedLevelName;
         #if UNITY_EDITOR
         levelName = System.IO.Path.GetFileNameWithoutExtension(EditorApplication.currentScene);
         #endif
         int minViewIdInThisScene = PunSceneSettings.MinViewIdForScene(levelName);
         //Debug.Log("Level '" + Application.loadedLevelName + "' has a minimum ViewId of: " + minViewIdInThisScene);

         PhotonView[] pvObjects = Resources.FindObjectsOfTypeAll(typeof(PhotonView)) as PhotonView[];

         foreach (PhotonView view in pvObjects)
         {
             // first pass: fix prefabs to viewID 0 if they got a view number assigned (cause they should not have one!)
             if (EditorUtility.IsPersistent(view.gameObject))
             {
                 if (view.viewID != 0 || view.prefixBackup != -1 || view.instantiationId != -1)
                 {
                     Debug.LogWarning("PhotonView on persistent object being fixed (id and prefix must be 0). Was: " + view);
                     view.viewID = 0;
                     view.prefixBackup = -1;
                     view.instantiationId = -1;
                     EditorUtility.SetDirty(view);
                     fixedSomeId = true;
                 }
             }
             else
             {
                 // keep all scene-instanced PVs for later re-check
                 pvInstances.Add(view);
             }
         }

         Dictionary idPerObject = new Dictionary();

         // second pass: check all used-in-scene viewIDs for duplicate viewIDs (only checking anything non-prefab)
         // scene-PVs must have user == 0 (scene/room) and a subId != 0
         foreach (PhotonView view in pvInstances)
         {
             if (view.ownerId > 0)
             {
                 Debug.Log("Re-Setting Owner ID of: " + view);
             }
             view.ownerId = 0; // simply make sure no owner is set (cause room always uses 0)
             view.prefix = -1; // TODO: prefix could be settable via inspector per scene?!

             if (view.viewID != 0)
             {
                 if (view.viewID < minViewIdInThisScene || usedInstanceViewNumbers.Contains(view.viewID))
                 {
                     view.viewID = 0; // avoid duplicates and negative values by assigning 0 as (temporary) number to be fixed in next pass
                 }
                 else
                 {
                     usedInstanceViewNumbers.Add(view.viewID); // builds a list of currently used viewIDs

                     int instId = 0;
                     if (idPerObject.TryGetValue(view.gameObject, out instId))
                     {
                         view.instantiationId = instId;
                     }
                     else
                     {
                         view.instantiationId = view.viewID;
                         idPerObject[view.gameObject] = view.instantiationId;
                     }
                 }
             }

         }

         // third pass: anything that's now 0 must get a new (not yet used) ID (starting at 0)
         int lastUsedId = (minViewIdInThisScene > 0) ? minViewIdInThisScene - 1 : 0;

         foreach (PhotonView view in pvInstances)
         {
             if (view.viewID == 0)
             {
                 // Debug.LogWarning("setting scene ID: " + view.gameObject.name + " ID: " + view.subId.ID + " scene ID: " + view.GetSceneID() + " IsPersistent: " + EditorUtility.IsPersistent(view.gameObject) + " IsSceneViewIDFree: " + IsSceneViewIDFree(view.subId.ID, view));
                 int nextViewId = PhotonViewHandler.GetID(lastUsedId, usedInstanceViewNumbers);

                 view.viewID = nextViewId;

                 int instId = 0;
                 if (idPerObject.TryGetValue(view.gameObject, out instId))
                 {
                     Debug.Log("Set inst ID");
                     view.instantiationId = instId;
                 }
                 else
                 {
                     view.instantiationId = view.viewID;
                     idPerObject[view.gameObject] = nextViewId;
                 }

                 //// when using the Editor's serialization (view.subId in this case), this is not needed, it seems
                 //PrefabUtility.RecordPrefabInstancePropertyModifications(view);

                 lastUsedId = nextViewId;
                 EditorUtility.SetDirty(view);
                 fixedSomeId = true;
             }
         }

         if (fixedSomeId)
         {
             //Debug.LogWarning("Some subId was adjusted."); // this log is only interesting for Exit Games
         }
     }