fix(fix-system): 修复维修场景鼠标视差偏移

Assets/Scripts/FixSystem/Effect/MouseFollowEffect.cs

@@ -183,12 +183,25 @@ namespace AibisDream
             Vector3 worldMousePosition = cameraForInput.ScreenToWorldPoint(mousePosition);
             worldMousePosition.z = 0;
 
-            // 视差锚点用 initialPosition，避免相机跟随平移后 delta 被抵消
-            Vector3 parallaxAnchor = UsesCinemachinePan ? initialPosition : ViewPosition;
-            parallaxAnchor.z = 0;
-            Vector3 delta = UsesCinemachinePan
-                ? worldMousePosition - parallaxAnchor
-                : parallaxAnchor - worldMousePosition;
+            Vector3 delta;
+            if (UsesCinemachinePan)
+            {
+                // 只使用鼠标相对视口中心的偏移，避免将相机自身的平移重复计入视差。
+                Vector3 screenCenter = new(
+                    cameraForInput.pixelRect.center.x,
+                    cameraForInput.pixelRect.center.y,
+                    mousePosition.z);
+                Vector3 worldScreenCenter = cameraForInput.ScreenToWorldPoint(screenCenter);
+                worldScreenCenter.z = 0;
+                delta = worldMousePosition - worldScreenCenter;
+            }
+            else
+            {
+                Vector3 parallaxAnchor = ViewPosition;
+                parallaxAnchor.z = 0;
+                delta = parallaxAnchor - worldMousePosition;
+            }
+
             Vector3 targetOffset = delta * parallaxEffectMultiplier;
             targetOffset.x = Mathf.Clamp(targetOffset.x, -maxOffset.x, maxOffset.x);
             targetOffset.y = Mathf.Clamp(targetOffset.y, -maxOffset.y, maxOffset.y);
@@ -198,13 +211,11 @@ namespace AibisDream
             Vector3 targetPosition = initialPosition + currentOffset;
             if (UsesCinemachinePan)
             {
-                Vector2 parallaxSlack = maxOffset * parallaxEffectMultiplier;
-                targetPosition = ClampFocusPositionWithSlack(
+                targetPosition = ClampFocusPosition(
                     targetPosition,
                     worldRegionMin,
                     worldRegionMax,
-                    GetViewportSize(),
-                    parallaxSlack);
+                    GetViewportSize());
             }
             else
             {
@@ -323,34 +334,6 @@ namespace AibisDream
             return new Vector2(height * cam.aspect, height);
         }
 
-        private static Vector3 ClampFocusPositionWithSlack(
-            Vector3 targetPosition,
-            Vector2 minBounds,
-            Vector2 maxBounds,
-            Vector2 viewportSize,
-            Vector2 slack)
-        {
-            if (maxBounds.x > minBounds.x)
-            {
-                float halfWidth = Mathf.Max(0f, viewportSize.x * 0.5f);
-                targetPosition.x = Mathf.Clamp(
-                    targetPosition.x,
-                    minBounds.x + halfWidth - slack.x,
-                    maxBounds.x - halfWidth + slack.x);
-            }
-
-            if (maxBounds.y > minBounds.y)
-            {
-                float halfHeight = Mathf.Max(0f, viewportSize.y * 0.5f);
-                targetPosition.y = Mathf.Clamp(
-                    targetPosition.y,
-                    minBounds.y + halfHeight - slack.y,
-                    maxBounds.y - halfHeight + slack.y);
-            }
-
-            return targetPosition;
-        }
-
         private static Vector3 ClampFocusPosition(Vector3 targetPosition, Vector2 minBounds, Vector2 maxBounds, Vector2 viewportSize)
         {
             if (maxBounds.x > minBounds.x)