unity3d自适应屏幕方案 - 纳金网

using System;
using System.Collections.Generic;
using UnityEngine;
public class AspectUtility : MonoBehaviour
{
public Vector2 maxAspectRatio = new Vector2(16, 9);
public Vector2 minAspectRatio = new Vector2(3, 2);
public bool landscapeModeOnly = true;
private float _wantedAspectRatio = 1.5f;
static public bool _landscapeModeOnly = true;
static float wantedAspectRatio;
static Camera cam;
static Camera backgroundCam;
void Awake()
{
if (Screen.width * maxAspectRatio.y > Screen.height * maxAspectRatio.x)
{
_wantedAspectRatio = maxAspectRatio.x / maxAspectRatio.y;
}
else if (Screen.width * minAspectRatio.y < Screen.height * minAspectRatio.x)
{
_wantedAspectRatio = minAspectRatio.x / minAspectRatio.y;
}
else
{
_wantedAspectRatio = (float)Screen.width / Screen.height;
}
_landscapeModeOnly = landscapeModeOnly;
cam = camera;
if (!cam)
{
cam = Camera.main;
Debug.Log("Setting the main camera " + cam.name);
}
else
{
Debug.Log("Setting the main camera " + cam.name);
}
if (!cam)
{
Debug.LogError("No camera available");
return;
}
wantedAspectRatio = _wantedAspectRatio;
SetCamera();
}
public static void SetCamera()
{
float currentAspectRatio = 0.0f;
if (Screen.orientation == ScreenOrientation.LandscapeRight ||
Screen.orientation == ScreenOrientation.LandscapeLeft)
{
Debug.Log("Landscape detected...");
currentAspectRatio = (float)Screen.width / Screen.height;
}
else
{
Debug.Log("Portrait detected...?");
if (Screen.height > Screen.width && _landscapeModeOnly)
{
currentAspectRatio = (float)Screen.height / Screen.width;
}
else
{
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)
Debug.Log("currentAspectRatio = " + currentAspectRatio + ", wantedAspectRatio = " + wantedAspectRatio);
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;
}
}
}

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