Code review updates

scottshambaugh · scottshambaugh · commit 1fe898104c3c · 2026-03-03T22:10:51.000-07:00
diff --git a/lib/matplotlib/collections.py b/lib/matplotlib/collections.py
@@ -1518,7 +1518,7 @@ def _make_verts(self, t, f1, f2, where):
         if n > 0:
             pts = np.empty((2 * n, 2))  # Preallocate and fill for speed
             pts[:n, 0], pts[:n, 1] = t_where, f1_where
-            pts[n:, 0], pts[n:, 1] = t_where[::-1], f2_where[::-1]
+            pts[n:, 0], pts[n:, 1] = t_where, f2_where
             self._bbox.update_from_data_xy(self._fix_pts_xy_order(pts))
 
         return [
@@ -1581,8 +1581,9 @@ def _make_verts_for_region(self, t, f1, f2, idx0, idx1):
         # Preallocate and fill for speed
         n = len(t_slice)
         pts = np.empty((2 * n + 2, 2))
-        pts[0], pts[n+1] = start, end
+        pts[0, :] = start
         pts[1:n+1, 0], pts[1:n+1, 1] = t_slice, f1_slice
+        pts[n+1, :] = end
         pts[n+2:, 0], pts[n+2:, 1] = t_slice[::-1], f2_slice[::-1]
 
         return self._fix_pts_xy_order(pts)
