Fix #4052. Bug where invalid plane was generated due to missing X axis.

src/ifcopenshell-python/ifcopenshell/util/shape_builder.py

@@ -171,6 +171,19 @@ class ShapeBuilder:
         #  self.file_file.createIfcAxis2Placement2D(tool.Ifc.get().createIfcCartesianPoint(center[0:2]))
         return ifc_curve
 
+    def plane(
+        self, location: Vector = Vector((0.0, 0.0, 0.0)).freeze(), normal: Vector = Vector((0.0, 0.0, 1.0)).freeze()
+    ):
+        location = self.file.createIfcCartesianPoint(location)
+        direction = self.file.createIfcDirection(normal)
+        if normal.to_tuple(2) == Vector((0.0, 0.0, 1.0)):
+            arbitrary_vector = Vector((0.0, 1.0, 0.0))
+        else:
+            arbitrary_vector = Vector((0.0, 0.0, 1.0))
+        x_axis = self.file.createIfcDirection(normal.cross(arbitrary_vector).normalized())
+        axis_placement = self.file.createIfcAxis2Placement3D(location, direction, x_axis)
+        return self.file.createIfcPlane(axis_placement)
+
     # TODO: explain points order for the curve_between_two_points
     # because the order is important and defines the center of the curve
     # currently it seems like the first point shifted by x-axis defines the center
@@ -846,9 +859,9 @@ class ShapeBuilder:
         # )
 
         points, segments, ifc_curve = self.get_simple_2dcurve_data(
-            coords, 
-            fillets =     (0,   1,   4, 5, 6,   7,   10, 11), 
-            fillet_radius=(r+t, r+t, r, r, r+t, r+t, r, r), 
+            coords,
+            fillets =     (0,   1,   4, 5, 6,   7,   10, 11),
+            fillet_radius=(r+t, r+t, r, r, r+t, r+t, r, r),
             closed=True, create_ifc_curve=True)
         # fmt: on