From a930c65d42830c898d1530a94256066f512e2c20 Mon Sep 17 00:00:00 2001
From: jan <jan@mpxd.net>
Date: Mon, 10 Feb 2020 10:09:07 -0800
Subject: [PATCH] fix gridrepetition mirror

---
 masque/repetition.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/masque/repetition.py b/masque/repetition.py
index f118f02..bf03d95 100644
--- a/masque/repetition.py
+++ b/masque/repetition.py
@@ -335,9 +335,9 @@ class GridRepetition:
         :return: self
         """
         self.mirror_elements(axis)
-        self.a_vector[axis] *= -1
+        self.a_vector[1-axis] *= -1
         if self.b_vector is not None:
-            self.b_vector[axis] *= -1
+            self.b_vector[1-axis] *= -1
         return self
 
     def mirror_elements(self, axis: int) -> 'GridRepetition':