How to Sync variables in Unity3D Networking

Hello Title was too general but I have several problems in my mind. I am new at UnityNetworking. I am watching youtube tutorial from quill18 and trying to implement on my project. So I know [SyncVar] values can only set and sync in server. But even I check isServer > hasAuthority > isLocalPlayer I cant be able to sync them properly. I can only be able to sync them only and only under isServer. Here is problem begins..

• So I have two public int variables with [SyncVar] and I am checking their values from Unity3D if they changed.
  
  
• If I change them under isServer if statement, they are changing both in Server and Client to 100 and 100.
  
  
• But after this If I change them in hasAuthority if statement they wont change same goes for isLocalPlayer...
  
  
• I tried changing them in a function before checking if isServer doesnt work.
  
  
• Even I try [Command] function, I know it runs in Server values still didn't change.
  

Code (CSharp):

1. private void Update()
2. {
3.     ServerUpdate();
4.     ClientUpdate();
5. }
6.  
7. [SyncVar] public int syncIT_1;
8. [SyncVar] public int syncIT_2;
9.  
10. void WillItSyncNow()
11. {
12.     if (isServer)
13.     {
14.         syncIT_1 = 300;
15.         syncIT_2 = 300;
16.     }      
17. }
18.  
19. [Command]
20. void CmdSyncPlease()
21. {
22.     syncIT_1 = 400;
23.     syncIT_2 = 400;
24. }
25.  
26. void ServerUpdate()
27. {      
28.      if (isServer)  
29.     {      
30.         syncIT_1 = 100;
31.         syncIT_2 = 100;
32.  
33.         if (hasAuthority)
34.         {
35.             syncIT_1 = 200;
36.             syncIT_2 = 200;
37.  
38.             if (isLocalPlayer == true)
39.             {
40.             WillItSyncNow();
41.             CmdSyncPlease();
42.             }
43.         }
44.     }
45. }

https://prnt.sc/mja8nz > Server Client Values
https://prnt.sc/mja978 > Client Values

 

You should probably post the full script and not only a part of it

 

Code (CSharp):

1.  
2. #pragma warning disable CS0618
3. using System.Collections;
4. using UnityEngine;
5. using UnityEngine.Networking;
6. using UnityEngine.UI;
7. public class GameManager : NetworkBehaviour
8. {
9.     //VARIABLES
10.     const int TURN_TIME = 5;
11.     public static QuestionList QuestionList = new QuestionList();
12.     [SyncVar] public int rndmQuestionNumber;
13.     [SyncVar] public int rndmOptionNumber;
14.     [SyncVar] public int sync_IT1;
15.     [SyncVar] public int sync_IT2;
16.     Button NextQuestionButton;
17.     GameObject NextQuestionButtonGO;
18.     GameObject IpCanvas;
19.     GameObject Timer;
20.     GameObject QuestionText;
21.     Button Option_1;
22.     Button Option_2;
23.     Button Option_3;
24.     Button Option_4;
25.     public bool DidIAnswer = false;
26.     public bool CanvasShow = false;
27.     public bool ButtonShow = false;
28.     public bool RunOnce = true;
29.     public string checkText = "";
30.     public float TurnTimer;
31.     // FUNCTIONS
32.     private void Start()
33.     {
34.         IpCanvas = GameObject.Find("IPCanvas");
35.         Timer = GameObject.Find("Timer");
36.         NextQuestionButton = IpCanvas.GetComponentInChildren<Button>();
37.         NextQuestionButton.onClick.AddListener(startNextTurn);
38.         NextQuestionButtonGO = GameObject.Find("NextButton");
39.         QuestionText = GameObject.Find("Question");
40.         Option_1 = GameObject.Find("Option_1").GetComponent<Button>();
41.         Option_2 = GameObject.Find("Option_2").GetComponent<Button>();
42.         Option_3 = GameObject.Find("Option_3").GetComponent<Button>();
43.         Option_4 = GameObject.Find("Option_4").GetComponent<Button>();
44.         Option_1.onClick.AddListener(option1Clicked);
45.         Option_2.onClick.AddListener(option2Clicked);
46.         Option_3.onClick.AddListener(option3Clicked);
47.         Option_4.onClick.AddListener(option4Clicked);
48.         CanvasEnabled(false);
49.         ButtonEnabled(false);
50.         getQuestionList();
51.     }
52.     private void CanvasEnabled(bool ISIT)
53.     {
54.         // Bu Arayüz Canvasının kontrol(show/hide) fonksiyonu!
55.         if (ISIT)
56.         {
57.             IpCanvas.GetComponent<Canvas>().enabled = ISIT;
58.         }
59.         else
60.         {
61.             IpCanvas.GetComponent<Canvas>().enabled = ISIT;
62.         }
63.         CanvasShow = ISIT;
64.     }
65.     private void ButtonEnabled(bool ISIT)
66.     {
67.         // Bu Arayüz Canvasındaki BUTTONun kontrol(show/hide) fonksiyonu!
68.         if (ISIT)
69.         {
70.             NextQuestionButtonGO.GetComponent<Canvas>().enabled = ISIT;
71.         }
72.         else
73.         {
74.             NextQuestionButtonGO.GetComponent<Canvas>().enabled = ISIT;
75.         }
76.         ButtonShow = ISIT;
77.     }
78.     private void getQuestionList()
79.     {
80.         CanvasEnabled(false);
81.         ButtonEnabled(false);
82.         //JSON Datayı ceken fonksiyon
83.         TextAsset asset = Resources.Load("history") as TextAsset;
84.         if (asset != null)
85.         {
86.             QuestionList = JsonUtility.FromJson<QuestionList>(asset.text);
87.         }
88.         else
89.         {
90.             Debug.Log("Assets are null!");
91.         }
92.     }
93.     private void Update()
94.     {
95.         ServerUpdate();
96.         //ClientUpdate();
97.     }
98.     // TODO: SYNCVAR SADECE ISSERVER ALTINDA CALISIYOR BUNU DÜZELTMEN GEREK
99.     // TODO: rndmQuestionNumber & rndmOptionNumber somehow dont sync fix it. !!!
100.     void ServerUpdate()
101.     {
102.         // Bu fonksiyon sadece Serverda calısır. Server aynı zamanda Clientsa'da calısır.
103.         if (isServer)
104.         {
105.             sync_IT1 = rndmQuestionNumber;
106.             sync_IT2 = rndmOptionNumber;
107.             if (isLocalPlayer)
108.             {
109.                 TurnTimer -= Time.deltaTime;
110.                 RpcTurnTimerRemaining(TurnTimer);
111.                 if (RunOnce)
112.                 {                  
113.                     startTheGame();
114.                 }
115.                 if (TurnTimer <= 0)
116.                 {
117.                     TurnTimer = 0;
118.                     Debug.Log("TUR BİTTİ");
119.                     RpcCheckAnswer("");
120.                 }
121.                 if (CanvasShow)
122.                 {
123.                     //TODO: Diger oyuncuların cevaplarını kontrol et eger hepsi cevaplamıssa timer baslat
124.                     if (DidIAnswer)
125.                     {
126.                         ButtonEnabled(true);
127.                     }
128.                 }
129.             }
130.         }
131.     }
132.     void ClientUpdate()
133.     {
134.         //Bu fonksiyon sadece ve sadece Clientlarda calısır, Eğer Client ve Server ise calısmaz..
135.         if (isServer == false)
136.         {
137.             if (hasAuthority)
138.             {
139.                 if (isLocalPlayer == true)
140.                 {
141.                     if (TurnTimer <= 0)
142.                     {
143.                         TurnTimer = 0;
144.                         checkAnswer("");
145.                     }
146.                 }
147.             }
148.         }
149.     }
150.     IEnumerator RpcSetQuestionIE()
151.     {
152.         yield return new WaitForSeconds(0.5f);
153.         RpcSetQuestion(rndmQuestionNumber, rndmOptionNumber);
154.     }
155.     [ClientRpc]
156.     void RpcTurnTimerRemaining(float turntimer)
157.     {
158.         Timer.GetComponent<Text>().text = turntimer.ToString("0");
159.     }
160.     //[ClientRpc] void RpcDEGERUPDATE(int a, int b)
161.     //{
162.     //    rndmQuestionNumber = a;
163.     //    rndmOptionNumber = b;
164.     //}
165.     [ClientRpc]
166.     void RpcSetQuestion(int question, int option)
167.     {
168.         Debug.Log("SERVER TARAFINDAN GÖNDERİLEN " + question + " " + option + " " + "İLE SORUMU OLUŞTURDUM");
169.         Debug.Log("TURN TIMERDAN GELEN DEGER İLE SÜREYİ AYARLADIM: " + TurnTimer);
170.         DidIAnswer = false;
171.         CanvasEnabled(false);
172.         ButtonEnabled(false);
173.         QuestionText.GetComponentInChildren<Text>().text = QuestionList.Question[question].question;
174.         GameObject.Find("Option_" + option).GetComponentInChildren<Text>().text = QuestionList.Question[question].answer.ToString();
175.         generateOtherOptions(question, option);
176.     }
177.     void generateOtherOptions(int question, int option)
178.     {
179.         // Bu fonksiyon secilen sorunun cevabını alıp eger cevap belli aralıklardan büyükse
180.         // ona göre MİN MAX olusturup generateOptionsTexts ine MİN MAX değerlerini gönderiyor
181.         int min = 0;
182.         int max = 0;
183.         if (QuestionList.Question[question].answer > 2000)
184.         {
185.             max = 400;
186.             generateOptionsTexts(min, max, question, option);
187.         }
188.         else if (QuestionList.Question[question].answer > 1000)
189.         {
190.             max = 100;
191.             generateOptionsTexts(min, max, question, option);
192.         }
193.         else if (QuestionList.Question[question].answer > 500)
194.         {
195.             max = 500;
196.             generateOptionsTexts(min, max, question, option);
197.         }
198.         else if (QuestionList.Question[question].answer > 100)
199.         {
200.             max = 100;
201.             generateOptionsTexts(min, max, question, option);
202.         }
203.         else if (QuestionList.Question[question].answer > 10)
204.         {
205.             max = 10;
206.             generateOptionsTexts(min, max, question, option);
207.         }
208.         else
209.         {
210.             max = 3;
211.             generateOptionsTexts(min, max, question, option);
212.         }
213.     }
214.     void generateOptionsTexts(int min, int max, int question, int option)
215.     {
216.         // Bu fonksiyon her bir şık için almış olduğu MİN MAX değerlerini
217.         // o şıkkın Texti oluşturulması için generateText fonksiyonuna gönderiyor.
218.         for (int i = 1; i <= 4; i++)
219.         {
220.             if (option == i)
221.             {
222.                 generateText(i, min, max, question);
223.             }
224.         }
225.     }
226.     void generateText(int index, int min, int max, int question)
227.     {
228.         // Bu fonksiyon dışarıdan gelen doğru cevap şıkkı MİN ve MAX değerini işleyip olusturduğu random sayının
229.         // 2ye bölümüne göre çıkartıyor, topluyor ve doğru cevap ise hic ellemiyor bu şekilde 4 şık olusturuyor.
230.         int rndmEven = Random.Range(1, 10);
231.         for (int i = 1; i <= 4; i++)
232.         {
233.             int rndm = Random.Range(min, max);
234.             if (rndmEven % 2 == 0)
235.             {
236.                 if (i == index)
237.                 {
238.                     continue;
239.                 }
240.                 else
241.                 {
242.                     GameObject.Find("Option_" + i).GetComponentInChildren<Text>().text = (QuestionList.Question[question].answer + rndm).ToString();
243.                 }
244.             }
245.             else
246.             {
247.                 if (i == index)
248.                 {
249.                     continue;
250.                 }
251.                 else
252.                 {
253.                     GameObject.Find("Option_" + i).GetComponentInChildren<Text>().text = (QuestionList.Question[question].answer - rndm).ToString();
254.                 }
255.             }
256.         }
257.     }
258.     void startTheGame()
259.     {
260.         TurnTimer = TURN_TIME;
261.         rndmQuestionNumber = Random.Range(0, QuestionList.Question.Count + 1);
262.         rndmOptionNumber = Random.Range(1, 5);
263.         StartCoroutine(RpcSetQuestionIE());
264.         RunOnce = false;
265.     }
266.     void startNextTurn()
267.     {
268.         // Only if Host clicks Button
269.         ButtonEnabled(false);
270.         RunOnce = true;
271.         TurnTimer = TURN_TIME;
272.     }
273.     public void option1Clicked()
274.     {
275.         if (isLocalPlayer)
276.         {
277.             checkText = Option_1.GetComponentInChildren<Text>().text;
278.             checkAnswer(checkText);
279.         }
280.     }
281.     public void option2Clicked()
282.     {
283.         if (isLocalPlayer)
284.         {
285.             checkText = Option_2.GetComponentInChildren<Text>().text;
286.             checkAnswer(checkText);
287.         }
288.     }
289.     public void option3Clicked()
290.     {
291.         if (isLocalPlayer)
292.         {
293.             checkText = Option_3.GetComponentInChildren<Text>().text;
294.             checkAnswer(checkText);
295.         }
296.     }
297.     public void option4Clicked()
298.     {
299.         if (isLocalPlayer)
300.         {
301.             checkText = Option_4.GetComponentInChildren<Text>().text;
302.             checkAnswer(checkText);
303.         }
304.     }
305.     [ClientRpc]
306.     void RpcCheckAnswer(string text)
307.     {
308.         DidIAnswer = true;
309.         string answer = text;
310.         CanvasEnabled(true);
311.         ButtonEnabled(true);
312.         if (QuestionList.Question[rndmQuestionNumber].answer.ToString() == answer)
313.         {
314.             IpCanvas.GetComponentInChildren<Text>().text = "Doğru Cevap";
315.             Debug.Log("Doğru Cevap");
316.         }
317.         else
318.         {
319.             IpCanvas.GetComponentInChildren<Text>().text = "Yanlış Cevap";
320.             Debug.Log("Yanlış Cevap: " + text + " , " + " Doğru Cevap: " + QuestionList.Question[rndmQuestionNumber].answer.ToString());
321.         }
322.     }
323.     void checkAnswer(string text)
324.     {
325.         DidIAnswer = true;
326.         string answer = text;
327.         CanvasEnabled(true);
328.         ButtonEnabled(true);
329.         if (QuestionList.Question[rndmQuestionNumber].answer.ToString() == answer)
330.         {
331.             IpCanvas.GetComponentInChildren<Text>().text = "Doğru Cevap";
332.             Debug.Log("Doğru Cevap");
333.         }
334.         else
335.         {
336.             IpCanvas.GetComponentInChildren<Text>().text = "Yanlış Cevap";
337.             Debug.Log("Yanlış Cevap: " + text + " , " + " Doğru Cevap: " + QuestionList.Question[rndmQuestionNumber].answer.ToString());
338.         }
339.     }
340. }
341.  

In general I have only issue here with when I want to Syncvar my rndmQuestionNumber and rndmOptionNumber both server and clients I cant

 

The main problem here: I can Sync Values under first isServer control from ServerUpdate like syncIT_1 = 100; and then both clients and server got value of 100. But when I do like syncIT_1 = Random.Range(1, 100); both client and server get different values which I really want to know why. Isn't suppose to sync values from server side?.

 

You might want to take a look at this topic about SyncVar:
https://forum.unity.com/threads/unity-networking-notes.596602/


Looking at your first post, the host (who is server AND client with local authority at the same time) is setting the syncvar at 400 in the first pass the moment the server is up and no one's there.
Then because it is already at 400, infinitly setting it at 400 won't do anything because it updates towards the clients only on change. And since the initialization occured before any clients joined and SyncVar do not update toward late comming clients, it stays at 100 for them since it's probably what they were set at in the public field.

Try updating the syncvar after every clients you want are connected to the server and just do:

Code (CSharp):

1. if (isServer & Input.GetKeyDown (KeyCode.A))
2.     syncIT_1 += 1;
3. else if (hasAuthority & Input.GetKeyDown (KeyCode.A))
4.     CmdSyncPlease();