Vector3 giving me 0 instead of value

my programming skills are not yet that good and i try to debug with logs..but i am getting a 0 value when i shouldn't (i think)

this is the script i am using.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class StructurePlacement : MonoBehaviour {
6.  
7.  
8.     private Transform currentStructure;
9.     private PlaceableStructure placeableStructure;
10.     private Camera cam;
11.     private bool hasPlaced;
12.     //added
13.     private Grid grid;
14.    // private Vector3 finalPosition;
15.     private Vector3 tempPosition;
16.  
17.     public LayerMask structureMask;
18.  
19.     // Use this for initialization
20.     private void Awake()
21.     {
22.         //get grid from other script
23.         grid = FindObjectOfType<Grid>();
24.         cam = Camera.main;
25.     }
26.  
27.     void Start() {
28.        
29.     }
30.  
31.     // Update is called once per frame
32.     void Update()
33.     {
34.  
35.         Vector3 m = Input.mousePosition;
36.         m = new Vector3(m.x,m.y,transform.position.y);
37.         Vector3 p = cam.ScreenToWorldPoint(m);
38.         Debug.Log("Mouse P" + p.x + " and" + p.z);
39.         PreviewCubeNear(p);
40.        
41.         Debug.Log("Mouse tempposition" + tempPosition.x + " and" + tempPosition.z);
42.  
43.  
44.  
45.         if (currentStructure != null && !hasPlaced)
46.         {
47.            
48.             currentStructure.position = new Vector3(tempPosition.x, 0, tempPosition.z);
49.             //currentStructure.position = new Vector3(p.x, 0, p.z);
50.  
51.  
52.  
53.  
54.             if (Input.GetMouseButtonDown(0))
55.             {
56.                 if (IsLegalPosition())
57.                 {
58.                     hasPlaced = true;
59.                 }
60.             }
61.         }
62.         else
63.         {
64.             if (Input.GetMouseButtonDown(0))
65.             {
66.                 RaycastHit hit = new RaycastHit();
67.                 Ray ray = new Ray(new Vector3(p.x, 8, p.z), Vector3.down);
68.                 if (Physics.Raycast(ray, out hit, Mathf.Infinity, structureMask))
69.                 {
70.                     Debug.Log(hit.collider.name);
71.                     //destroy the object that is clicked
72.                     Destroy(hit.collider.gameObject);
73.                 }
74.             }
75.         }
76.     }
77.  
78.     //don't place inside other structure
79.     bool IsLegalPosition()
80.     {
81.         if(placeableStructure.colliders.Count>0)
82.         {
83.             return false;
84.         }
85.         return true;
86.     }
87.  
88.     public void SetItem(GameObject b)
89.     {
90.         hasPlaced = false;
91.    
92.         currentStructure = ((GameObject)Instantiate(b)).transform;
93.    
94.         placeableStructure = currentStructure.GetComponent<PlaceableStructure>();
95.     }
96.  
97.     private void PreviewCubeNear(Vector3 clickPoint)
98.     {
99.         //Get the grid position from the script grid
100.         var tempPosition = grid.GetNearestPointOnGrid(clickPoint);
101.    
102.     }
103.  
104.     }

in the Grid script the GetNearestPointOnGrid is:

Code (CSharp):

1. public Vector3 GetNearestPointOnGrid(Vector3 position)
2.     {
3.         Debug.Log("grid near" + position);
4.         position -= transform.position;
5.         Debug.Log("position" + position);
6.         int xCount = Mathf.RoundToInt(position.x / sizeGable);
7.         int yCount = Mathf.RoundToInt(position.y / sizeSide);
8.         int zCount = Mathf.RoundToInt(position.z / sizeSide);
9.  
10.         Vector3 result = new Vector3(
11.             (float)xCount * sizeGable,
12.             (float)yCount * sizeSide,
13.             (float)zCount * sizeSide);
14.  
15.         result += transform.position;
16.         Debug.Log("result" + result);
17.  
18.         return result;
19.     }

the result in the grid script gives me an debug log for example (21.0, 3.0, 7.0)
this result is feeded into the other script in the variable tempPosition if i am correct..but that Debug gives me 0..
that should be the same value...or am i missing something

so i the normal situation without the grid script..the gameobject can be placed everywhere..now i want the object to stick to the grid in worldspace.. the camera can orbit and pan so i need worldcoordinates and not the camcoordinates, that is why i use the grid on a seperate game object.

 

found the problem i am declaring the variable tempposition not setting it.

1. 
   
   Code (CSharp):

   1. private void PreviewCubeNear(Vector3 clickPoint)
   2.     {
   3.         //Get the grid position from the script grid
   4.         var tempPosition = grid.GetNearestPointOnGrid(clickPoint);
   5.  
   6.     }
   the var tempPostion doesn't need the var... only tempPosition = ......