提交N3 功能的改动

backend/engine/cdsl_engine/build123d_adapter.py

@@ -7,8 +7,9 @@ from typing import Any, Iterable
 
 from build123d import Axis, Compound, Edge, Face, Location, Plane, ShapeList, Solid, Vector, Wire, export_step
 
+from .parametric_bend import build_bend_solid
 from .parametric_thread import build_thread_solid
-from .runtime_types import AxisSpec, HoleSpec, PlaneSpec, ThreadSpec, TopologyRecord, Vector3, canonical_plane_signature
+from .runtime_types import AxisSpec, BendSpec, HoleSpec, PlaneSpec, ThreadSpec, TopologyRecord, Vector3, canonical_plane_signature
 
 
 def _vector(value: list[float] | tuple[float, float, float]) -> Vector:
@@ -378,6 +379,26 @@ class Build123dGeometryAdapter:
         plane = Plane(origin=_vector(spec.axis.origin_mm), x_dir=frame_x, z_dir=direction)
         return solid.moved(Location(plane))
 
+    @staticmethod
+    def bend_solid(spec: BendSpec) -> Any:
+        """Build one bent sheet segment placed on ``spec.frame``.
+
+        The parametric generator constructs the sheet locally with the first
+        wing along +X, its mid-plane spanning +X/+Z (thickness along +Y) and
+        the fold (width) axis along +Z.  This gate rotates that local frame so
+        the first wing lands on ``spec.frame.y_dir`` (= normal x x_dir), the
+        sheet thickness on ``spec.frame.normal`` and the width axis on
+        ``spec.frame.x_dir``.
+        """
+        solid = build_bend_solid(spec)
+        frame = spec.frame
+        plane = Plane(
+            origin=_vector(frame.origin_mm),
+            x_dir=_vector(frame.y_dir),
+            z_dir=_vector(frame.x_dir),
+        )
+        return solid.moved(Location(plane))
+
     @staticmethod
     def fillet(body: Any, radius_mm: float, edges: Iterable[Edge]) -> Any:
         # 对指定边以给定半径做圆角。