Partial solution for #6775.

The issue happens when a wall has a "ATPATH" connection and has a
negative direction sense. It mixes the profile points in an incorrect
order. This commit seems to fix it, but maybe there is a better solution.

src/ifcopenshell-python/ifcopenshell/api/geometry/regenerate_wall_representation.py

@@ -150,6 +150,8 @@ class Regenerator:
                     continue
                 self.join(wall, wall2, layers1, layers2, rel.RelatedConnectionType, rel.RelatingConnectionType)
 
+        miny = axes[-2][0][1]
+        maxy = axes[-1][0][1]
         if not self.start_points:
             minx = axes[0][0][0]
             self.start_points = [
@@ -266,6 +268,13 @@ class Regenerator:
             split_points.append(end_points)
             split_points = iter(split_points)
 
+            if maxy < miny:
+                self.maxpath_points, self.minpath_points = self.minpath_points, self.maxpath_points
+                if self.maxpath_points:
+                    self.maxpath_points[0] = list(reversed(self.maxpath_points[0]))
+                if self.minpath_points:
+                    self.minpath_points[0] = list(reversed(self.minpath_points[0]))
+
             while True:
                 # Draw each profile as clockwise starting from (minx, miny)
                 start_split = next(split_points, None)