How can I pass a variable to OnCollisionEnter2D?

Hi everyone, can somebody help me? I created a private variable, that I feed from other script, but when I want to use it in OnCollisionEnter2D it's equal to zero, not to my new value, here's the code:

Code (CSharp):

1. private int sd;
2.  
3.     void Start()
4.         {
5.         Debug.Log (sd + " start");
6.         }
7.  
8.     // Update is called once per frame
9.     void Update ()
10.         {
11.         Debug.Log (sd + " update");
12.         }
13.  
14.     public void indice(int ID)
15.         {
16.         sd = ID;
17.         Debug.Log (sd + " indice");
18.         }
19.  
20.     void OnCollisionEnter2D(Collision2D coll)
21.         {
22.         if (coll.gameObject.tag == "Finish" && sd != 0)
23.             {
24.             Debug.Log (sd + " colision");
25.             }
26.         }

As you can see, the only part that the value is correct is here Debug.Log (sd + " indice");, in the other parts always is printed as a zero. Can somebody tell me what am I doing wrong?

 

Check all places where you call indice(). I guess there must be a place where you set to 0 again.
Or (I guess the code is just an excerpt of your script) there's a piece of code where you set sd to 0 again.

 

I call indice() in other script that is my "spawner", because I can spawn randomly pieces from that, so, when I spawn them, since there I spawn an id, I send that id to this script, as you can see I asign a value to "sd", I can print well with Debug.Log (sd + " indice"); but printing in other parts of the script results as zero e.g.

Debug.Log (sd + " start"); prints "0 start"
Debug.Log (sd + " update"); prints "0 update" and
Debug.Log (sd + " colision"); printos "0 colision"

It's like even the "sd" variable is usable in all the script, it couldn't get out of the function indice() and I don't understand why.