From 00a1d1a4964bf69d7aeb84d212c318a5a09bd3e1 Mon Sep 17 00:00:00 2001
From: Christopher Lackner <clackner@cerbsim.com>
Date: Thu, 4 Aug 2022 10:31:33 +0200
Subject: [PATCH] visualized failed mesh after generatemesh

---
 libsrc/meshing/meshfunc.cpp | 8 ++++++++
 libsrc/occ/python_occ.cpp   | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/libsrc/meshing/meshfunc.cpp b/libsrc/meshing/meshfunc.cpp
index 667ac416..d942f111 100644
--- a/libsrc/meshing/meshfunc.cpp
+++ b/libsrc/meshing/meshfunc.cpp
@@ -586,6 +586,8 @@ namespace netgen
 
      auto md = DivideMesh(mesh3d, mp);
 
+     try
+       {
      ParallelFor( md.Range(), [&](int i)
        {
          if (mp.checkoverlappingboundary)
@@ -597,6 +599,12 @@ namespace netgen
          CloseOpenQuads( md[i] );
          MeshDomain(md[i]);
        }, md.Size());
+       }
+     catch(...)
+       {
+         MergeMeshes(mesh3d, md);
+         return MESHING3_GIVEUP;
+       }
 
      MergeMeshes(mesh3d, md);
 
diff --git a/libsrc/occ/python_occ.cpp b/libsrc/occ/python_occ.cpp
index e0b67031..7a55fc13 100644
--- a/libsrc/occ/python_occ.cpp
+++ b/libsrc/occ/python_occ.cpp
@@ -26,6 +26,7 @@ using namespace netgen;
 namespace netgen
 {
   extern std::shared_ptr<NetgenGeometry> ng_geometry;
+  extern std::shared_ptr<Mesh> mesh;
 }
 
 static string occparameter_description = R"delimiter(
@@ -270,6 +271,7 @@ DLL_HEADER void ExportNgOCC(py::module &m)
                            if (comm.Rank()==0)
                              {
                                SetGlobalMesh(mesh);
+                               netgen::mesh = mesh;
                                auto result = geo->GenerateMesh(mesh, mp);
                                if(result != 0)
                                  throw Exception("Meshing failed!");