[Unity] Duda al escalar

using UnityEngine;
 
public class AspectUtility : MonoBehaviour {
 
public float _wantedAspectRatio = 1.3333333f;
static float wantedAspectRatio;
static Camera cam;
static Camera backgroundCam;
 
void Awake () {
	cam = camera;
	if (!cam) {
		cam = Camera.main;
	}
	if (!cam) {
		Debug.LogError ("No camera available");
		return;
	}
	wantedAspectRatio = _wantedAspectRatio;
	SetCamera();
}
 
public static void SetCamera () {
	float currentAspectRatio = (float)Screen.width / Screen.height;
	// If the current aspect ratio is already approximately equal to the desired aspect ratio,
	// use a full-screen Rect (in case it was set to something else previously)
	if ((int)(currentAspectRatio * 100) / 100.0f == (int)(wantedAspectRatio * 100) / 100.0f) {
		cam.rect = new Rect(0.0f, 0.0f, 1.0f, 1.0f);
		if (backgroundCam) {
			Destroy(backgroundCam.gameObject);
		}
		return;
	}
	// Pillarbox
	if (currentAspectRatio > wantedAspectRatio) {
		float inset = 1.0f - wantedAspectRatio/currentAspectRatio;
		cam.rect = new Rect(inset/2, 0.0f, 1.0f-inset, 1.0f);
	}
	// Letterbox
	else {
		float inset = 1.0f - currentAspectRatio/wantedAspectRatio;
		cam.rect = new Rect(0.0f, inset/2, 1.0f, 1.0f-inset);
	}
	if (!backgroundCam) {
		// Make a new camera behind the normal camera which displays black; otherwise the unused space is undefined
		backgroundCam = new GameObject("BackgroundCam", typeof(Camera)).camera;
		backgroundCam.depth = int.MinValue;
		backgroundCam.clearFlags = CameraClearFlags.SolidColor;
		backgroundCam.backgroundColor = Color.black;
		backgroundCam.cullingMask = 0;
	}
}
 
public static int screenHeight {
	get {
		return (int)(Screen.height * cam.rect.height);
	}
}
 
public static int screenWidth {
	get {
		return (int)(Screen.width * cam.rect.width);
	}
}
 
public static int xOffset {
	get {
		return (int)(Screen.width * cam.rect.x);
	}
}
 
public static int yOffset {
	get {
		return (int)(Screen.height * cam.rect.y);
	}
}
 
public static Rect screenRect {
	get {
		return new Rect(cam.rect.x * Screen.width, cam.rect.y * Screen.height, cam.rect.width * Screen.width, cam.rect.height * Screen.height);
	}
}
 
public static Vector3 mousePosition {
	get {
		Vector3 mousePos = Input.mousePosition;
		mousePos.y -= (int)(cam.rect.y * Screen.height);
		mousePos.x -= (int)(cam.rect.x * Screen.width);
		return mousePos;
	}
}
 
public static Vector2 guiMousePosition {
	get {
		Vector2 mousePos = Event.current.mousePosition;
		mousePos.y = Mathf.Clamp(mousePos.y, cam.rect.y * Screen.height, cam.rect.y * Screen.height + cam.rect.height * Screen.height);
		mousePos.x = Mathf.Clamp(mousePos.x, cam.rect.x * Screen.width, cam.rect.x * Screen.width + cam.rect.width * Screen.width);
		return mousePos;
	}
}
}