67 lines
1.6 KiB
C#
67 lines
1.6 KiB
C#
using UnityEngine;
|
|
|
|
[ExecuteAlways]
|
|
[RequireComponent(typeof(Camera))]
|
|
public class CameraLetterbox : MonoBehaviour
|
|
{
|
|
public float targetAspect = 16f / 9f;
|
|
|
|
// 关闭时相机填满整个屏幕（跟随用户分辨率，无黑边）；开启时回退到旧的 16:9 锁定加黑边行为。
|
|
// 透视相机填满屏幕会按 Hor+ 水平扩展视野，不会拉伸变形。
|
|
public bool lockAspect = false;
|
|
|
|
private int lastWidth;
|
|
private int lastHeight;
|
|
|
|
void OnEnable()
|
|
{
|
|
ApplyLetterbox();
|
|
lastWidth = Screen.width;
|
|
lastHeight = Screen.height;
|
|
}
|
|
|
|
void Update()
|
|
{
|
|
if (Screen.width != lastWidth || Screen.height != lastHeight)
|
|
{
|
|
ApplyLetterbox();
|
|
lastWidth = Screen.width;
|
|
lastHeight = Screen.height;
|
|
}
|
|
}
|
|
|
|
void ApplyLetterbox()
|
|
{
|
|
Camera cam = GetComponent<Camera>();
|
|
|
|
if (!lockAspect)
|
|
{
|
|
cam.rect = new Rect(0f, 0f, 1f, 1f);
|
|
return;
|
|
}
|
|
|
|
float screenAspect = (float)Screen.width / Screen.height;
|
|
float scaleHeight = screenAspect / targetAspect;
|
|
|
|
if (scaleHeight < 1.0f)
|
|
{
|
|
cam.rect = new Rect(
|
|
0,
|
|
(1f - scaleHeight) / 2f,
|
|
1,
|
|
scaleHeight
|
|
);
|
|
}
|
|
else
|
|
{
|
|
float scaleWidth = 1f / scaleHeight;
|
|
cam.rect = new Rect(
|
|
(1f - scaleWidth) / 2f,
|
|
0,
|
|
scaleWidth,
|
|
1
|
|
);
|
|
}
|
|
}
|
|
}
|