From 9f6ca746cdf2fe1f2275041bb060a65c963e1ad1 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Thu, 28 Nov 2019 21:53:56 +0100
Subject: [PATCH] euclid:: fixed the orientable flag

---
 euclid.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/euclid.cpp b/euclid.cpp
index 148d5fcf..99d12328 100644
--- a/euclid.cpp
+++ b/euclid.cpp
@@ -526,6 +526,7 @@ EX namespace euclid3 {
     if(twisted&1) nonori = !nonori;
     if(twisted&2) nonori = !nonori;
     if(twisted&4) nonori = !nonori;
+    if(twisted&8) nonori = !nonori;
     set_flag(ginf[g].flags, qNONORIENTABLE, nonori);      
     }