1using System.Collections;
 2using System.Collections.Generic;
 3using UnityEngine;
 4
 5public class CameraAspect : MonoBehaviour
 6{
 7
 8    // Use this for initialization
 9    void Start()
10    {
11        // set the desired aspect ratio (the values in this example are
12        // hard-coded for 16:9, but you could make them into public
13        // variables instead so you can set them at design time)
14        float targetaspect = 16.0f / 9.0f;
15
16        // determine the game window's current aspect ratio
17        float windowaspect = (float)Screen.width / (float)Screen.height;
18
19        // current viewport height should be scaled by this amount
20        float scaleheight = windowaspect / targetaspect;
21
22        // obtain camera component so we can modify its viewport
23        Camera camera = GetComponent<Camera>();
24
25        // if scaled height is less than current height, add letterbox
26        if (scaleheight < 1.0f)
27        {
28            Rect rect = camera.rect;
29
30            rect.width = 1.0f;
31            rect.height = scaleheight;
32            rect.x = 0;
33            rect.y = (1.0f - scaleheight) / 2.0f;
34
35            camera.rect = rect;
36        }
37        else // add pillarbox
38        {
39            float scalewidth = 1.0f / scaleheight;
40
41            Rect rect = camera.rect;
42
43            rect.width = scalewidth;
44            rect.height = 1.0f;
45            rect.x = (1.0f - scalewidth) / 2.0f;
46            rect.y = 0;
47
48            camera.rect = rect;
49        }
50    }
51
52
53}