From d5f3c3776a22bb9663127e3cbad1ffa68a06fc0b Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Thu, 30 Aug 2018 16:05:52 +0200
Subject: [PATCH] make sure that mirror placement treats vertices differently

---
 archimedean.cpp | 4 ++++
 complex.cpp     | 1 +
 2 files changed, 5 insertions(+)

diff --git a/archimedean.cpp b/archimedean.cpp
index 580b6a65..0d050329 100644
--- a/archimedean.cpp
+++ b/archimedean.cpp
@@ -1205,6 +1205,10 @@ int degree(heptagon *h) {
   return isize(current.adjacent[id_of(h)]);
   }
 
+bool is_vertex(heptagon *h) {
+  return id_of(h) >= 2 * current.N;
+  }
+
 int valence() {
   if(PURE) return arcm::current.N;
   if(BITRUNCATED) return 3;
diff --git a/complex.cpp b/complex.cpp
index 10a7e9a3..5f8097ca 100644
--- a/complex.cpp
+++ b/complex.cpp
@@ -1141,6 +1141,7 @@ namespace mirror {
   // we go by heptagons in Archimedean, 
   bool equal(heptspin h1, heptspin h2, int lev) {
     if(h1.at->degree() != h2.at->degree()) return false;
+    if(arcm::is_vertex(h1.at) != arcm::is_vertex(h2.at)) return false;
     if(lev) for(int i=0; i<h1.at->degree(); i++) {
       heptspin h11 = h1 + i + wstep;
       heptspin h21 = h2 + i + wstep;