From b2e81005459f0434bd627d9ac54f3eeb5b6149d3 Mon Sep 17 00:00:00 2001
From: Joachim Schoeberl <joachim.schoeberl@tuwien.ac.at>
Date: Sun, 13 Nov 2022 19:09:13 +0100
Subject: [PATCH] order elements such that first vertex is lowest index (reduce
 equivalence classes)

---
 libsrc/meshing/basegeom.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libsrc/meshing/basegeom.cpp b/libsrc/meshing/basegeom.cpp
index 6a9a8721..367d4ec8 100644
--- a/libsrc/meshing/basegeom.cpp
+++ b/libsrc/meshing/basegeom.cpp
@@ -1153,6 +1153,8 @@ namespace netgen
       for (int i = 0; i < mesh.GetNDomains(); i++)
         if (auto name = solids[i]->properties.name)
           mesh.SetMaterial (i+1, *name);
+
+    mesh.OrderElements();
   }
   
   shared_ptr<NetgenGeometry> GeometryRegisterArray :: LoadFromMeshFile (istream & ist) const