feat: 推进SCDM-first后端接入和大模型编辑优化

step_editor/operations.py

@@ -11298,6 +11298,11 @@ class OperationMixin:
             return None
         source_plane = source_surf.Plane()
         cap_plane_point = source_plane.Location()
+        try:
+            if len(_explore(self.faces[face_id], TopAbs_WIRE)) > 2:
+                return None
+        except Exception:
+            pass
         try:
             scope_face_ids = self._connected_coplanar_planar_face_ids(face_id) or [face_id]
         except Exception:
@@ -11342,14 +11347,29 @@ class OperationMixin:
                 continue
             center_axis_distance = _point_axis_distance(axis_point, axis_dir, cap_center)
 
-            axis_range = self._cylindrical_axis_range(adjacent_id, side_surf)
-            v_min = float(axis_range["v_min"])
-            v_max = float(axis_range["v_max"])
+            source_v_min = min(float(side_surf.FirstVParameter()), float(side_surf.LastVParameter()))
+            source_v_max = max(float(side_surf.FirstVParameter()), float(side_surf.LastVParameter()))
+            axis_range = {
+                "v_min": source_v_min,
+                "v_max": source_v_max,
+                "same_domain_face_ids": (adjacent_id,),
+                "range_source": "selected-face-v-range-fast",
+            }
+            v_min = source_v_min
+            v_max = source_v_max
             old_height = max(v_max - v_min, 1e-9)
             cap_parameter = _axis_parameter(axis_point, axis_dir, cap_plane_point)
             start_distance = abs(cap_parameter - v_min)
             end_distance = abs(cap_parameter - v_max)
             end_tolerance = max(old_height * 0.05, radius * 0.2, tolerance * 10.0, 0.05)
+            if start_distance > end_tolerance and end_distance > end_tolerance:
+                axis_range = self._cylindrical_axis_range(adjacent_id, side_surf)
+                v_min = float(axis_range["v_min"])
+                v_max = float(axis_range["v_max"])
+                old_height = max(v_max - v_min, 1e-9)
+                start_distance = abs(cap_parameter - v_min)
+                end_distance = abs(cap_parameter - v_max)
+                end_tolerance = max(old_height * 0.05, radius * 0.2, tolerance * 10.0, 0.05)
 
             delta_abs = abs(float(distance))
             operation = "extend" if distance > 0 else "retract"