Correct area/volume calculations from intersect with new return type of ShapeList

src/build123d/drafting.py

@@ -453,7 +453,7 @@ class DimensionLine(BaseSketchObject):
             if self_intersection is None:
                 self_intersection_area = 0.0
             else:
-                self_intersection_area = self_intersection.area
+                self_intersection_area = sum(f.area for f in self_intersection.faces())
             d_line += placed_label
             bbox_size = d_line.bounding_box().diagonal
 
@@ -467,7 +467,7 @@ class DimensionLine(BaseSketchObject):
                 if line_intersection is None:
                     common_area = 0.0
                 else:
-                    common_area = line_intersection.area
+                    common_area = sum(f.area for f in line_intersection.faces())
             common_area += self_intersection_area
             score = (d_line.area - 10 * common_area) / bbox_size
             d_lines[d_line] = score

src/build123d/topology/composite.py

@@ -649,11 +649,7 @@ class Compound(Mixin3D, Shape[TopoDS_Compound]):
                     children[child_index_pair[1]]
                 )
                 if obj_intersection is not None:
-                    common_volume = (
-                        0.0
-                        if isinstance(obj_intersection, list)
-                        else obj_intersection.volume
-                    )
+                    common_volume = sum(s.volume for s in obj_intersection.solids())
                     if common_volume > tolerance:
                         return (
                             True,

src/build123d/topology/two_d.py

@@ -778,15 +778,13 @@ class Face(Mixin2D, Shape[TopoDS_Face]):
             ).sort_by(Axis(cog, cross_dir))
 
             bottom_area = sum(f.area for f in bottom_list)
-            intersect_area = 0.0
             for flipped_face, bottom_face in zip(top_flipped_list, bottom_list):
                 intersection = flipped_face.intersect(bottom_face)
-                if intersection is None or isinstance(intersection, list):
+                if intersection is None:
                     intersect_area = -1.0
                     break
                 else:
-                    assert isinstance(intersection, Face)
-                    intersect_area += intersection.area
+                    intersect_area = sum(f.area for f in intersection.faces())
 
             if intersect_area == -1.0:
                 continue

tests/test_direct_api/test_oriented_bound_box.py

@@ -229,13 +229,15 @@ class TestOrientedBoundBox(unittest.TestCase):
             obb = OrientedBoundBox(rect)
             corners = obb.corners
             poly = Polygon(*corners, align=None)
-            self.assertAlmostEqual(rect.intersect(poly).area, rect.area, 5)
+            area = sum(f.area for f in rect.intersect(poly).faces())
+            self.assertAlmostEqual(area, rect.area, 5)
 
         for face in Box(1, 2, 3).faces():
             obb = OrientedBoundBox(face)
             corners = obb.corners
             poly = Polygon(*corners, align=None)
-            self.assertAlmostEqual(face.intersect(poly).area, face.area, 5)
+            area = sum(f.area for f in face.intersect(poly).faces())
+            self.assertAlmostEqual(area, face.area, 5)
 
     def test_line_corners(self):
         """

tests/test_direct_api/test_shape.py

@@ -299,7 +299,8 @@ class TestShape(unittest.TestCase):
         predicted_location = Location(offset) * Rotation(*rotation)
         located_shape = Solid.make_box(1, 1, 1).locate(predicted_location)
         intersect = shape.intersect(located_shape)
-        self.assertAlmostEqual(intersect.volume, 1, 5)
+        volume = sum(s.volume for s in intersect.solids())
+        self.assertAlmostEqual(volume, 1, 5)
 
     def test_position_and_orientation(self):
         box = Solid.make_box(1, 1, 1).locate(Location((1, 2, 3), (10, 20, 30)))
@@ -588,7 +589,7 @@ class TestShape(unittest.TestCase):
             empty.distance_to_with_closest_points(Vector(1, 1, 1))
         with self.assertRaises(ValueError):
             empty.distance_to(Vector(1, 1, 1))
-        with self.assertRaises(ValueError):
+        with self.assertRaises(AttributeError):
             box.intersect(empty_loc)
         self.assertEqual(empty._ocp_section(Vertex(1, 1, 1)), ([], []))
         self.assertEqual(empty.faces_intersected_by_axis(Axis.Z), ShapeList())

tests/test_direct_api/test_solid.py

@@ -153,7 +153,9 @@ class TestSolid(unittest.TestCase):
         self.assertAlmostEqual(twist.volume, 1, 5)
         top = twist.faces().sort_by(Axis.Z)[-1].rotate(Axis.Z, 45)
         bottom = twist.faces().sort_by(Axis.Z)[0]
-        self.assertAlmostEqual(top.translate((0, 0, -1)).intersect(bottom).area, 1, 5)
+        intersect = top.translate((0, 0, -1)).intersect(bottom)
+        area = sum(f.area for f in intersect.faces())
+        self.assertAlmostEqual(area, 1, 5)
         # Wire
         base = Wire.make_rect(1, 1)
         twist = Solid.extrude_linear_with_rotation(
@@ -162,7 +164,9 @@ class TestSolid(unittest.TestCase):
         self.assertAlmostEqual(twist.volume, 1, 5)
         top = twist.faces().sort_by(Axis.Z)[-1].rotate(Axis.Z, 45)
         bottom = twist.faces().sort_by(Axis.Z)[0]
-        self.assertAlmostEqual(top.translate((0, 0, -1)).intersect(bottom).area, 1, 5)
+        intersect = top.translate((0, 0, -1)).intersect(bottom)
+        area = sum(f.area for f in intersect.faces())
+        self.assertAlmostEqual(area, 1, 5)
 
     def test_make_loft(self):
         loft = Solid.make_loft(

tests/test_drafting.py

@@ -231,7 +231,8 @@ class DimensionLineTestCase(unittest.TestCase):
                 ],
                 draft=metric,
             )
-        self.assertGreater(hole.intersect(d_line).area, 0)
+        area = sum(f.area for f in hole.intersect(d_line).faces())
+        self.assertGreater(area, 0)
 
     def test_outside_arrows(self):
         d_line = DimensionLine([(0, 0, 0), (15, 0, 0)], draft=metric)