Fixed Issue #944

Author: gumyr

src/build123d/operations_part.py

@@ -516,7 +516,8 @@ def section(
     else:
         raise ValueError("No object to section")
 
-    max_size = to_section.bounding_box(optimal=False).diagonal
+    bbox = to_section.bounding_box(optimal=False)
+    max_size = max(abs(v) for v in list(bbox.min) + list(bbox.max)) + bbox.diagonal
 
     if section_by is not None:
         section_planes = (

tests/test_build_part.py

@@ -442,6 +442,12 @@ def test_custom_plane(self):
             s = section(section_by=Plane.XZ)
         self.assertAlmostEqual(s.area, 100 * pi, 5)
 
+    def test_moved_object(self):
+        sec = section(Pos(-100, 100) * Sphere(10), Plane.XY)
+        self.assertEqual(len(sec.faces()), 1)
+        self.assertAlmostEqual(sec.face().edge().radius, 10, 5)
+        self.assertAlmostEqual(sec.face().center(), (-100, 100, 0), 5)
+
 
 class TestSplit(unittest.TestCase):
     def test_split(self):