(3D) Camera display adapter to design aspect

In Unity we can have 3D and 2D objects.

Each adapted to display differently:

- 3D objects: Setting Camera.rect and Camera.pixelRect
-The Sprites are like 3D planes but are drawings on both sides. That is, their aspect would be adjusted as a 3D object.
- UI system has CanvasScaler component.
- GUI system used GUI.matrix.
- GUIText and GUITexture use screen coordinate as GUI but do not use a matrix variable, you need set the Rect directly.

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(3D) Camera display adapter to design aspect

Used to 3D objects and sprites (2D). Resolutions and aspect, from lowest to highest:


5: 4 --> aspect(width/height) 1.25 for example 1280x1024
4: 3 --> 1.33333 ... f.e. 800x600
3: 2 --> 1.5 f.e. 1600x1024
16:10 -> 1.6 f.e. 1280x768
16: 9 -> 1.77777 ... f.e. 1280x720

Would adjust the rendering area by Camera.rect, and would place in the center of screen with Camera.pixelRect:

Code (CSharp):

1. using UnityEngine;
2.  
3. public class DesignAdapter : MonoBehaviour {
4.  
5.     public enum Aspect {Aspect5by4, Aspect4by3, Aspect3by2,Aspect16by10,Aspect16by9};
6.  
7.     new public Camera camera;
8.     public Aspect originalAspect = Aspect.Aspect5by4;
9.  
10.     float[] ratios = new float[]{1.25f,1.333f,1.5f,1.6f,1.777f};
11.  
12.     void Reduce(Aspect currentAspect){
13.  
14.         float percentage = (ratios[(int)currentAspect] - ratios[(int)originalAspect])
15.                             / ratios[(int)currentAspect];
16.         this.camera.rect = new Rect(0f,0f,1f - percentage , 1f);
17.         this.camera.pixelRect = new Rect(Screen.width * percentage * 0.5f , 0f , Screen.width * (1f - percentage), (float)Screen.height);
18.  
19.     }
20.  
21.     void Grow(Aspect currentAspect){
22.  
23.         float percentage = (ratios[(int)originalAspect] - ratios[(int)currentAspect])
24.                             / ratios[(int)originalAspect];
25.         this.camera.rect = new Rect(0f,0f,1f,1f - percentage);
26.         this.camera.pixelRect = new Rect(0f, Screen.height * percentage * 0.5f , (float)Screen.width , Screen.height * (1f - percentage));
27.  
28.     }
29.  
30.     void Awake(){
31.  
32.         float screenAspect = this.camera.aspect;
33.         Aspect currentAspect;
34.  
35.         if(screenAspect < 1.29f)  currentAspect = Aspect.Aspect5by4;
36.         else if(screenAspect < 1.4f) currentAspect = Aspect.Aspect4by3;
37.         else if(screenAspect < 1.6f) currentAspect = Aspect.Aspect3by2;
38.         else if(screenAspect < 1.7) currentAspect = Aspect.Aspect16by10;
39.         else currentAspect = Aspect.Aspect16by9;
40.  
41.         if(currentAspect > this.originalAspect) this.Reduce(currentAspect);
42.         if(currentAspect < this.originalAspect) this.Grow(currentAspect);
43.  
44.     }
45.  
46. }
47.