好多新内容

Assets/CameraLetterBox.cs

@@ -6,6 +6,10 @@ 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;
 
@@ -29,6 +33,13 @@ public class CameraLetterbox : MonoBehaviour
     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;