- added renderer

src/fluency/ui/viewer_widget.py

@@ -395,6 +395,16 @@ class Viewer3DWidget(QWidget):
             np.array([0.0, 0.0, 1.0], dtype=float),
         )
 
+    def get_camera_fov(self) -> float:
+        """Return the current vertical FOV in degrees from the renderer.
+
+        Falls back to 45.0 if the renderer doesn't support it.
+        """
+        self._ensure_initialized()
+        if hasattr(self._renderer, "get_camera_fov"):
+            return self._renderer.get_camera_fov()
+        return 45.0
+
     # ─── Face-pick mode (sketch-on-surface) ────────────────────────────────
 
     def set_pick_face_mode(self, enabled: bool) -> None: