Question Orthographic Camera fit problem

I create random sized 2d grids and set the camera to middle of the grid, I also try to understand orthographic size and adjust it to fit whole grid but I guess I fail, Here are the code snippet and the fitting problem:

I would also be appreciated if you have any other advice for my programming and design style.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.Tilemaps;
5. using UnityEngine.WSA;
6.  
7. public class Grid2D : MonoBehaviour
8. {
9.     [SerializeField] private int _width, _height;
10.     [SerializeField] private Tile  _tilePrefap;
11.     [SerializeField] private  Camera _cam;
12.  
13.     void Start()
14.     {
15.  
16.         GenerarteGrid();
17.         SetCamera(_width,_height);
18.  
19.     }
20.     // Update is called once per frame
21.     void Update()
22.     {
23.        
24.     }
25.  
26.     private void GenerarteGrid()
27.     {
28.         for (int i = 0; i < _width; i++)
29.         {
30.             for (int j = 0; j < _height; j++)
31.             {
32.                 var tile = Instantiate(_tilePrefap, new Vector3(i, j, 0), Quaternion.identity);
33.                 tile.transform.parent = transform;
34.                 tile.name = j + " " + i;
35.  
36.             }
37.         }
38.     }
39.  
40.  
41.  
42.     private void SetCamera(int x, int y)
43.     {
44.         _cam.orthographicSize = (float) _height / 2 + 0.5f ;
45.  
46.         _cam.transform.position = new Vector3((float)x / 2 - 0.5f, (float)y / 2 - 0.5f, 0);
47.     }
48.  
49.  
50. }

 

Start with the docs for Camera. By default it is half the visible world height.

 

your screen must be the same resolution as the grid if you want to fit it

in this case your grid seems 8:10, so do you want 8:10 resolution?

 

I actually want my screen to be 9:16, and regardless of the dimension of grid I want to fit it in my screen.

 

then you will need to make a 9:16 grid