Why am I not able to move this object on the Z axis?

Recently, I’ve started work on grid-based placing game focused around earning money. I have almost all the basis’ of the game figured out, but there’s this one reoccurring issue — I can’t move objects around of the Z-axis. It works fine on the X-axis but won’t nudge on the Z. Can anyone help figure this out? Any and all help is appreciated.

P.S: there are many scripts associated with this script, but the placing/moving lies within this script.

EDIT: Changed currentBuilding to where it was originally before I tested to see if Z ever changes

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class PlaceableBuilding : MonoBehaviour
6. {
7.     private Transform currentBuilding;
8.     private bool hasPlaced;
9.     private BuildingManager bm;
10.     public Transform grid;
11.     public List<GameObject> border = new List<GameObject>();
12.  
13.     public float minX, maxX, minZ, maxZ;
14.  
15.     private void Start()
16.     {
17.         bm = GetComponent<BuildingManager>();
18.     }
19.  
20.     private void Update()
21.     {
22.         if(currentBuilding != null && !hasPlaced)
23.         {
24.             Vector3 mouse = Input.mousePosition;
25.             mouse = new Vector3(mouse.x, mouse.y, transform.position.y);
26.             Vector3 pos = Camera.main.ScreenToWorldPoint(mouse);
27.             currentBuilding.position = new Vector3(pos.x, transform.position.y, pos.y);
28.  
29.             if(Input.GetMouseButton(0))
30.             {
31.                 Vector3 p = new Vector3(currentBuilding.localPosition.x, currentBuilding.localPosition.y, currentBuilding.localPosition.z);
32.  
33.                 float nx = Mathf.Round(Camera.main.ScreenToWorldPoint(mouse).x);
34.                 float ny = Mathf.Round(Camera.main.ScreenToWorldPoint(mouse).y);
35.                 float nz = Mathf.Round(Camera.main.ScreenToWorldPoint(mouse).z);
36.  
37.                 Vector3 v = new Vector3 (nx, ny, nz);
38.                 if (nx > maxX || nx < minX || nz > maxZ || nz < minZ)
39.                 {
40.                     Debug.LogError("Out of Bounds");
41.                     Debug.Log(Camera.main.ScreenToWorldPoint(mouse));
42.                 } else if (nx <= maxX || nx >= minX || nz <= maxZ || nz >= minZ)
43.                 {
44.                     hasPlaced = true;
45.                 }
46.             }
47.         }
48.     }
49.  
50.     public void SetItem(GameObject item)
51.     {
52.         hasPlaced = false;
53.         currentBuilding = Instantiate(item, new Vector3(0, 0, 0), Quaternion.identity).transform;
54.     }
55. }
56.  

 

This line prevents moving on Z:

Code (CSharp):

1.             currentBuilding.position = new Vector3(pos.x, 0, 2);

Either change that 2 to something of value, or do not modify Z axis.

 

I fixed it to where line 28 should be able to move around on the Z axis, but it just doesn't.