Syncing custom list

Hi all, I'm hoping this will be a better place to find help than in the scripting section;
I've set up a custom list

Code (csharp):

1.  
2. public class ItemList {
3.  
4.     public string itemName { get; set; }
5.     public int typeID { get; set; }
6.     public int modification1 { get; set; }
7.     public float mod1Effect { get; set; }
8.     public int modification2 { get; set; }
9.     public float mod2Effect { get; set; }
10.     public int modification3 { get; set; }
11.     public float mod3Effect { get; set; }
12.     public float tier { get; set; }
13.     public int stackCount { get; set; }
14. }

And I'm needing to sync an instance of this so it's consistent for all connected players, but I can't seem to figure it out and there isn't a whole lot of relevant information in the docs.

 

Any suggestions?

 

Please, some help is needed.

 

Is it even possible to sync a user-defined list?

 

If the instance is immutable, you can use SyncListStruct. Otherwise you'll need to handle the syncing yourself

 

I don't know what is meant by "immutable"

 

Immutable means it doesn't change, i.e. you set the initial values and then you don't change them

 

I have yet to find a good example of SyncListStruct being used. Can anyone provide one? They seem like they would be really useful for syncing larger amounts of data than SyncVars.

The problem I had was understanding how I can access their elements and use them, modify an element etc.

 

I've only started experimenting with SyncListStruct, but here's how I got things to not give errors... Not tested, so not 100% it'll work, but... No errors is progress.

Code (csharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3. using UnityEngine.Networking;
4.  
5. public class listTest : NetworkBehaviour
6. {
7.   public struct listOfItems
8.   {
9.     public string itemName { get; set; }
10.     public int typeID { get; set; }
11.     public int modification1 { get; set; }
12.     public float mod1Effect { get; set; }
13.     public int modification2 { get; set; }
14.     public float mod2Effect { get; set; }
15.     public int modification3 { get; set; }
16.     public float mod3Effect { get; set; }
17.     public float tier { get; set; }
18.     public int stackCount { get; set; }
19.   }
20.   public class SyncListItemList : SyncListStruct<listOfItems> { }
21.   public SyncListItemList storedItems = new SyncListItemList();
22.  
23. //Other stuff that this script does
24. }

 

Thanks Vedrit. It would be interesting to follow your progress on this.

I am just reworking my network code on my project. The project is a simulator and has a requirement to sync a lot of data so I'm keen to get my head around sync lists.

 

Glad to know I'm not the only one having issues with SyncLists.
I'm having issues of retrieving information from it by a different script... I can get information from the list if I do something like this

Code (csharp):

1. void Update()
2.     {
3.         if(Input.GetKey(KeyCode.K) && Input.GetKey(KeyCode.I))
4.         {
5.             for (var i = 0; i < storedItems.Count; i++)
6.             {
7.                 print("Item " + i + " is " + storedItems[i].itemName);
8.             }
9.         }
10.     }

But if I try that from any other script, I get nothing no matter how many items have been added to the list.

Edit: I did some fiddling and when I expressly state which item I am trying to get info when doing a print or debug command from another script, then I can get the info, but not when I iterate through in a for loop. I'll try and look into it more tomorrow, since it's late as of this edit and I need to sleep.

 

Alright, so I don't know why it wasn't working last night. I know part of the problem I was experiencing was, for some reason, my script wasn't instantiating an object. But I've got everything working now.
Don't forget that you'll need to have any changes to the SyncList done via commands. Here's what I've got
(Because of my setup, the script with the list is separate but a component of whatever object the list is for) buildingStorage script

Code (csharp):

1.  
2. using UnityEngine.Networking;
3.  
4. public class buildingStorage : NetworkBehaviour {
5.  
6.     public struct listOfItems
7.     {
8.         public string itemName { get; set; }
9.         public int typeID { get; set; }
10.         public int modification1 { get; set; }
11.         public float mod1Effect { get; set; }
12.         public int modification2 { get; set; }
13.         public float mod2Effect { get; set; }
14.         public int modification3 { get; set; }
15.         public float mod3Effect { get; set; }
16.         public float tier { get; set; }
17.         public int stackCount { get; set; }
18.     }
19.     public class SyncItemList : SyncListStruct<listOfItems> { }
20.     public SyncItemList storedItems = new SyncItemList();
21. }

Portion of the playerCommands script (where I put all of my client-side commands) as it relates to adding to the SyncList

Code (csharp):

1. [Command]
2. public void CmdAddItem (GameObject objectWList, buildingStorage.listOfItems item)
3. {
4.     buildingStorage list = objectWList.GetComponent<buildingStorage>();
5.     list.storedItems.Add(item);
6. }

Portion of the script player interacts with to add an item

Code (csharp):

1. if(buildingInv.GetComponent<SmallPlot>() != null)
2. {
3.     buildingStorage.listOfItems addedItem = new buildingStorage.listOfItems { itemName = newItemInfo.itemName, mod1Effect = newItemInfo.mod1Effect, typeID = newItemInfo.typeID, modification1 = newItemInfo.modification1, mod2Effect = newItemInfo.mod2Effect, mod3Effect = newItemInfo.mod3Effect, tier = newItemInfo.tier, stackCount = newItemInfo.stackCount, modification2 = newItemInfo.modification2, modification3 = newItemInfo.modification3 };
4.     buildingInv.GetComponent<SmallPlot>().plyrCmds.CmdAddItem(buildingInv.gameObject, addedItem);
5. }

It really is similar to regular lists, just a couple extra hoops you have to jump through (And should be re-iterated in the docs regarding SyncLists)
I hope this helps any other lost souls

 

It seems like you're confused as to how anything "Sync____" works. Whether it be a SyncVar or a SyncListInt or a SyncListStruct, etc...etc... the server is in control of what happens to that Sync____. Because of this, if the player wants to make a change to the Sync___, yes, there would have to be a Command to be sent to the server requesting the change. However, ALL changes do not have to be made via commands. There can be code that exists to only function on the server that makes changes. For example, there could be a box on the ground that has a script on it with an OnTriggerEnter function that is set up to only execute on the server. When the player enters the trigger, the contents of that box are added to their inventory...a SyncList of some kind. Hope this clears things up for you.