Adding new algo for parallel meshing

idl/NETGENPlugin_Algorithm.idl

@@ -44,6 +44,13 @@ module NETGENPlugin
   {
   };
 
+  /*!
+   * NETGENPlugin_NETGEN_3D: interface of "Remote Tetrahedron (Netgen)" algorithm
+   */
+  interface NETGENPlugin_NETGEN_3D_Remote : NETGENPlugin::NETGENPlugin_NETGEN_3D
+  {
+  };
+
   /*!
    * NETGENPlugin_NETGEN_2D: interface of "Netgen 1D-2D" algorithm
    */
@@ -140,6 +147,9 @@ module NETGENPlugin
     void    SetWorstElemMeasure(in short val );
     short   GetWorstElemMeasure();
 
+    void    SetNbThreads(in short val );
+    short   GetNbThreads();
+
     void    SetUseDelauney(in boolean toUse);
     boolean GetUseDelauney();
 

src/NETGENPlugin/CMakeLists.txt

@@ -17,9 +17,12 @@
 # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
 #
 
+INCLUDE(UseQtExt)
+
 # --- options ---
 # additional include directories
 INCLUDE_DIRECTORIES(
+  ${QT_INCLUDES}
   ${KERNEL_INCLUDE_DIRS}
   ${GUI_INCLUDE_DIRS}
   ${GEOM_INCLUDE_DIRS}
@@ -35,6 +38,7 @@ INCLUDE_DIRECTORIES(
 
 # additional preprocessor / compiler flags
 ADD_DEFINITIONS(
+  ${QT_DEFINITIONS}
   ${OMNIORB_DEFINITIONS}
   ${OpenCASCADE_DEFINITIONS}
   ${BOOST_DEFINITIONS}
@@ -63,7 +67,10 @@ SET(_link_LIBRARIES
   ${KERNEL_SalomeNS}
   ${KERNEL_SALOMELocalTrace}
   ${KERNEL_OpUtil}
+  VTK::CommonCore
+  VTK::CommonDataModel
   SalomeIDLNETGENPLUGIN
+  Qt5::Core
 )
 
 # --- headers ---
@@ -91,6 +98,10 @@ SET(NETGENEngine_HEADERS
   NETGENPlugin_Mesher.hxx
   NETGENPlugin_Remesher_2D.hxx
   NETGENPlugin_Defs.hxx
+  NETGENPlugin_DriverParam.hxx
+  NETGENPlugin_NETGEN_3D_SA.hxx
+  NETGENPlugin_NETGEN_3D_Remote.hxx
+  NETGENPlugin_NETGEN_3D_Remote_i.hxx
 )
 
 # --- sources ---
@@ -118,6 +129,14 @@ SET(NETGENEngine_SOURCES
   NETGENPlugin_SimpleHypothesis_3D_i.cxx
   NETGENPlugin_Remesher_2D.cxx
   NETGENPlugin_i.cxx
+  NETGENPlugin_DriverParam.cxx
+  NETGENPlugin_NETGEN_3D_SA.cxx
+  NETGENPlugin_NETGEN_3D_Remote.cxx
+  NETGENPlugin_NETGEN_3D_Remote_i.cxx
+)
+
+SET(NetgenRunner_SOURCES
+  NETGENPlugin_Runner_main.cxx
 )
 
 # --- scripts ---
@@ -134,6 +153,10 @@ ADD_LIBRARY(NETGENEngine ${NETGENEngine_SOURCES})
 TARGET_LINK_LIBRARIES(NETGENEngine ${_link_LIBRARIES} )
 INSTALL(TARGETS NETGENEngine EXPORT ${PROJECT_NAME}TargetGroup DESTINATION ${SALOME_INSTALL_LIBS})
 
+ADD_EXECUTABLE(NETGENPlugin_Runner ${NetgenRunner_SOURCES})
+TARGET_LINK_LIBRARIES(NETGENPlugin_Runner ${_link_LIBRARIES} NETGENEngine )
+INSTALL(TARGETS NETGENPlugin_Runner EXPORT ${PROJECT_NAME}TargetGroup DESTINATION ${SALOME_INSTALL_BINS})
+
 INSTALL(FILES ${NETGENEngine_HEADERS} DESTINATION ${SALOME_INSTALL_HEADERS})
 
 SALOME_INSTALL_SCRIPTS("${_bin_SCRIPTS}" ${SALOME_INSTALL_PYTHON}/salome/NETGENPlugin)

src/NETGENPlugin/NETGENPluginBuilder.py

@@ -42,6 +42,7 @@ NETGEN_VERSION_MAJOR = NETGENPlugin.NETGEN_VERSION_MAJOR
 
 ## Algorithm type: Netgen tetrahedron 3D algorithm, see NETGEN_3D_Algorithm
 NETGEN_3D     = "NETGEN_3D"
+NETGEN_3D_Remote     = "NETGEN_3D_Remote"
 ## Algorithm type: Netgen tetrahedron 1D-2D-3D algorithm, see NETGEN_1D2D3D_Algorithm
 NETGEN_1D2D3D = "NETGEN_2D3D"
 ## Algorithm type: Netgen triangle 1D-2D algorithm, see NETGEN_1D2D_Algorithm
@@ -147,6 +148,12 @@ class NETGEN_Algorithm(Mesh_Algorithm):
         if self.Parameters(): self.params.SetGrowthRate(theRate)
         pass
 
+    ## Sets @c NbThreads parameter
+    #  @param theRate new value of the @c NbThreads parameter
+    def SetNbThreads(self, theNumber):
+        if self.Parameters(): self.params.SetNbThreads(theNumber)
+        pass
+
     ## Creates meshing hypothesis according to the chosen algorithm type
     #  and initializes it with default parameters
     #  @param which hypothesis type; can be either @ref SOLE (default) or @ref SIMPLE
@@ -328,6 +335,7 @@ class NETGEN_1D2D_Algorithm(NETGEN_1D2D3D_Algorithm):
     #  @internal
     docHelper  = "Creates triangle 2D algorithm for faces"
 
+
     ## Private constructor.
     #  @param mesh parent mesh object algorithm is assigned to
     #  @param geom geometry (shape/sub-shape) algorithm is assigned to;
@@ -361,6 +369,8 @@ class NETGEN_2D_Only_Algorithm(NETGEN_Algorithm):
     #  @internal
     docHelper  = "Creates triangle 2D algorithm for faces"
 
+    isDefault = True
+
     ## Private constructor.
     #  @param mesh parent mesh object algorithm is assigned to
     #  @param geom geometry (shape/sub-shape) algorithm is assigned to;
@@ -470,6 +480,37 @@ class NETGEN_3D_Algorithm(NETGEN_Algorithm):
 
     pass # end of NETGEN_3D_Algorithm class
 
+## Tetrahedron 3D algorithm
+#
+#  It can be created by calling smeshBuilder.Mesh.Tetrahedron() or smeshBuilder.Mesh.Tetrahedron( smeshBuilder.NETGEN, geom=0 )
+#
+#  This algorithm generates only 3D (volumes) elements for given geometrical shape
+#  and, in contrast to NETGEN_1D2D3D_Algorithm class, should be used in conjunction
+#  with other 1D and 2D meshing algorithms.
+class NETGEN_3D_Remote_Algorithm(NETGEN_3D_Algorithm):
+
+    ## type of algorithm used with helper function in smeshBuilder.Mesh class
+    #  @internal
+    algoType   = NETGEN_3D_Remote
+    ## flag pointing either this algorithm should be used by default in dynamic method
+    #  of smeshBuilder.Mesh class
+    #  @internal
+    isDefault  = False
+    ## doc string of the method
+    #  @internal
+    docHelper  = "Remotely Creates tetrahedron 3D algorithm for solids"
+
+    ## Private constructor.
+    #  @param mesh parent mesh object algorithm is assigned to
+    #  @param geom geometry (shape/sub-shape) algorithm is assigned to;
+    #              if it is @c 0 (default), the algorithm is assigned to the main shape
+    def __init__(self, mesh, geom=0):
+        NETGEN_3D_Algorithm.__init__(self, mesh, geom)
+        pass
+
+    pass # end of NETGEN_3D_Remote_Algorithm class
+
+
 
 ## Triangle (helper) 1D-2D algorithm
 #

src/NETGENPlugin/NETGENPlugin_DriverParam.cxx

@@ -0,0 +1,172 @@
+// Copyright (C) 2007-2022  CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+
+//  File   : NETGENPlugin_DriverParam.hxx
+//  Author : Yoann AUDOUIN, EDF
+//  Module : NETGEN
+//
+#include "NETGENPlugin_DriverParam.hxx"
+
+
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <cassert>
+
+/**
+ * @brief Print content of a netgen_params
+ *
+ * @param aParams The object to display
+ */
+void printNetgenParams(netgen_params& aParams){
+  std::cout << "has_netgen_param: " << aParams.has_netgen_param << std::endl;
+  std::cout << "maxh: " << aParams.maxh << std::endl;
+  std::cout << "minh: " << aParams.minh << std::endl;
+  std::cout << "segmentsperedge: " << aParams.segmentsperedge << std::endl;
+  std::cout << "grading: " << aParams.grading << std::endl;
+  std::cout << "curvaturesafety: " << aParams.curvaturesafety << std::endl;
+  std::cout << "secondorder: " << aParams.secondorder << std::endl;
+  std::cout << "quad: " << aParams.quad << std::endl;
+  std::cout << "optimize: " << aParams.optimize << std::endl;
+  std::cout << "fineness: " << aParams.fineness << std::endl;
+  std::cout << "uselocalh: " << aParams.uselocalh << std::endl;
+  std::cout << "merge_solids: " << aParams.merge_solids << std::endl;
+  std::cout << "chordalError: " << aParams.chordalError << std::endl;
+  std::cout << "optsteps2d: " << aParams.optsteps2d << std::endl;
+  std::cout << "optsteps3d: " << aParams.optsteps3d << std::endl;
+  std::cout << "elsizeweight: " << aParams.elsizeweight << std::endl;
+  std::cout << "opterrpow: " << aParams.opterrpow << std::endl;
+  std::cout << "delaunay: " << aParams.delaunay << std::endl;
+  std::cout << "checkoverlap: " << aParams.checkoverlap << std::endl;
+  std::cout << "checkchartboundary: " << aParams.checkchartboundary << std::endl;
+  std::cout << "closeedgefac: " << aParams.closeedgefac << std::endl;
+  std::cout << "nbThreadMesher: " << aParams.nbThreads << std::endl;
+  std::cout << "has_local_size: " << aParams.has_local_size << std::endl;
+  std::cout << "meshsizefilename: " << aParams.meshsizefilename << std::endl;
+  std::cout << "has_maxelementvolume_hyp: " << aParams.has_maxelementvolume_hyp << std::endl;
+  std::cout << "maxElementVolume: " << aParams.maxElementVolume << std::endl;
+  std::cout << "has_LengthFromEdges_hyp: " << aParams.has_LengthFromEdges_hyp << std::endl;
+}
+
+/**
+ * @brief Import a param_file into a netgen_params structure
+ *
+ * @param param_file Name of the file
+ * @param aParams Structure to fill
+ */
+void importNetgenParams(const std::string param_file, netgen_params& aParams){
+  std::ifstream myfile(param_file);
+  std::string line;
+
+  std::getline(myfile, line);
+  aParams.has_netgen_param = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.maxh = std::stod(line);
+  std::getline(myfile, line);
+  aParams.minh = std::stod(line);
+  std::getline(myfile, line);
+  aParams.segmentsperedge = std::stod(line);
+  std::getline(myfile, line);
+  aParams.grading = std::stod(line);
+  std::getline(myfile, line);
+  aParams.curvaturesafety = std::stod(line);
+  std::getline(myfile, line);
+  aParams.secondorder = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.quad = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.optimize = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.fineness = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.uselocalh = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.merge_solids = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.chordalError = std::stod(line);
+  std::getline(myfile, line);
+  aParams.optsteps2d = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.optsteps3d = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.elsizeweight = std::stod(line);
+  std::getline(myfile, line);
+  aParams.opterrpow = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.delaunay = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.checkoverlap = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.checkchartboundary = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.closeedgefac = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.nbThreads = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.has_local_size = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.meshsizefilename = line;
+  std::getline(myfile, line);
+  aParams.has_maxelementvolume_hyp = std::stoi(line);
+  std::getline(myfile, line);
+  aParams.maxElementVolume = std::stod(line);
+  std::getline(myfile, line);
+  aParams.maxElementVolume = std::stoi(line);
+
+};
+
+/**
+ * @brief Writes the content of a netgen_param into a file
+ *
+ * @param param_file the file
+ * @param aParams the object
+ */
+void exportNetgenParams(const std::string param_file, netgen_params& aParams){
+  std::ofstream myfile(param_file);
+  myfile << aParams.has_netgen_param << std::endl;
+  myfile << aParams.maxh << std::endl;
+  myfile << aParams.minh << std::endl;
+  myfile << aParams.segmentsperedge << std::endl;
+  myfile << aParams.grading << std::endl;
+  myfile << aParams.curvaturesafety << std::endl;
+  myfile << aParams.secondorder << std::endl;
+  myfile << aParams.quad << std::endl;
+  myfile << aParams.optimize << std::endl;
+  myfile << aParams.fineness << std::endl;
+  myfile << aParams.uselocalh << std::endl;
+  myfile << aParams.merge_solids << std::endl;
+  myfile << aParams.chordalError << std::endl;
+  myfile << aParams.optsteps2d << std::endl;
+  myfile << aParams.optsteps3d << std::endl;
+  myfile << aParams.elsizeweight << std::endl;
+  myfile << aParams.opterrpow << std::endl;
+  myfile << aParams.delaunay << std::endl;
+  myfile << aParams.checkoverlap << std::endl;
+  myfile << aParams.checkchartboundary << std::endl;
+  myfile << aParams.closeedgefac << std::endl;
+  myfile << aParams.nbThreads << std::endl;
+  myfile << aParams.has_local_size << std::endl;
+  myfile << aParams.meshsizefilename << std::endl;
+  myfile << aParams.has_maxelementvolume_hyp << std::endl;
+  myfile << aParams.maxElementVolume << std::endl;
+  myfile << aParams.has_LengthFromEdges_hyp << std::endl;
+};

src/NETGENPlugin/NETGENPlugin_DriverParam.hxx

@@ -0,0 +1,80 @@
+// Copyright (C) 2007-2021  CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+
+//  File   : NETGENPlugin_DriverParam.hxx
+//  Author : Yoann AUDOUIN, EDF
+//  Module : NETGEN
+//
+
+#ifndef _NETGENPLUGIN_DRIVERPARAM_HXX_
+#define _NETGENPLUGIN_DRIVERPARAM_HXX_
+
+#include <string>
+
+struct netgen_params{
+  // Params from NETGENPlugin_Mesher
+  // True if _hypParameters is not null
+  bool has_netgen_param=true;
+  double maxh;
+  double minh;
+  double segmentsperedge;
+  double grading;
+  double curvaturesafety;
+  int secondorder;
+  int quad;
+  bool optimize;
+  int fineness;
+  bool uselocalh;
+  bool merge_solids;
+  double chordalError;
+  int optsteps2d;
+  int optsteps3d;
+  double elsizeweight;
+  int opterrpow;
+  bool delaunay;
+  bool checkoverlap;
+  bool checkchartboundary;
+  int closeedgefac;
+
+  // Number of threads for the mesher
+  int nbThreads;
+
+  // True if we have a mesh size file or local size info
+  bool has_local_size = false;
+  std::string meshsizefilename;
+
+  // Params from NETGEN3D
+  // True if _hypMaxElementVolume is not null
+  bool has_maxelementvolume_hyp=false;
+  double maxElementVolume=0.0;
+
+  // Params from NETGEN2D
+  bool has_LengthFromEdges_hyp=false;
+
+};
+
+void printNetgenParams(netgen_params& aParams);
+
+void importNetgenParams(const std::string param_file, netgen_params& aParams);
+void exportNetgenParams(const std::string param_file, netgen_params& aParams);
+
+#endif

src/NETGENPlugin/NETGENPlugin_Hypothesis.cxx

@@ -58,6 +58,7 @@ NETGENPlugin_Hypothesis::NETGENPlugin_Hypothesis (int hypId, SMESH_Gen * gen)
     _nbVolOptSteps      (GetDefaultNbVolOptSteps()),
     _elemSizeWeight     (GetDefaultElemSizeWeight()),
     _worstElemMeasure   (GetDefaultWorstElemMeasure()),
+    _nbThreads          (GetDefaultNbThreads()),
     _surfaceCurvature   (GetDefaultSurfaceCurvature()),
     _useDelauney        (GetDefaultUseDelauney()),
     _checkOverlapping   (GetDefaultCheckOverlapping()),
@@ -436,6 +437,20 @@ void NETGENPlugin_Hypothesis::SetCheckChartBoundary( bool theVal )
   }
 }
 
+//=======================================================================
+//function : SetNbThreads
+//purpose  :
+//=======================================================================
+
+void NETGENPlugin_Hypothesis::SetNbThreads( int theVal )
+{
+  if (theVal != _nbThreads)
+  {
+    _nbThreads = theVal;
+    NotifySubMeshesHypothesisModification();
+  }
+}
+
 //=============================================================================
 /*!
  *

src/NETGENPlugin/NETGENPlugin_Hypothesis.hxx

@@ -35,6 +35,7 @@
 #include "Utils_SALOME_Exception.hxx"
 
 #include <map>
+#include <thread>
 
 //  Parameters for work of NETGEN
 //
@@ -125,6 +126,9 @@ public:
   void   SetCheckChartBoundary( bool toCheck );
   bool   GetCheckChartBoundary() const { return _checkChartBoundary; }
 
+  void   SetNbThreads( int val );
+  int    GetNbThreads() const { return _nbThreads; }
+
   // the default values (taken from NETGEN 4.5 sources)
 
   static Fineness GetDefaultFineness()          { return Moderate; }
@@ -145,6 +149,7 @@ public:
   static bool     GetDefaultCheckOverlapping()  { return true; }
   static bool     GetDefaultCheckChartBoundary(){ return true; }
   static bool     GetDefaultFuseEdges()         { return true; }
+  static int      GetDefaultNbThreads()         { return std::thread::hardware_concurrency(); }
 
   // Persistence
   virtual std::ostream & SaveTo  (std::ostream & save);
@@ -197,6 +202,9 @@ private:
   //bool          _blockFilling; -- not used by netgen
   // (SALOME additions)
   bool          _fuseEdges;
+
+  // Parallelism parameters
+  int _nbThreads;
 };
 
 #endif

src/NETGENPlugin/NETGENPlugin_Hypothesis_i.cxx

@@ -566,6 +566,30 @@ CORBA::Short NETGENPlugin_Hypothesis_i::GetWorstElemMeasure()
   return (CORBA::Short) GetImpl()->GetWorstElemMeasure();
 }
 
+//=======================================================================
+//function : SetNbThreads
+//purpose  :
+//=======================================================================
+
+void NETGENPlugin_Hypothesis_i::SetNbThreads(CORBA::Short val )
+{
+  if ( GetNbThreads() != val )
+  {
+    this->GetImpl()->SetNbThreads( val );
+    SMESH::TPythonDump() << _this() << ".SetNbThreads( " << SMESH::TVar(val) << " )";
+  }
+}
+
+//=======================================================================
+//function : GetNbThreads
+//purpose  :
+//=======================================================================
+
+CORBA::Short NETGENPlugin_Hypothesis_i::GetNbThreads()
+{
+  return (CORBA::Short) GetImpl()->GetNbThreads();
+}
+
 //=======================================================================
 //function : SetUseDelauney
 //purpose  :

src/NETGENPlugin/NETGENPlugin_Hypothesis_i.hxx

@@ -113,6 +113,9 @@ class NETGENPLUGIN_EXPORT NETGENPlugin_Hypothesis_i:
   void    SetWorstElemMeasure(CORBA::Short val );
   CORBA::Short GetWorstElemMeasure();
 
+  void    SetNbThreads(CORBA::Short val );
+  CORBA::Short GetNbThreads();
+
   void    SetUseDelauney(CORBA::Boolean toUse);
   CORBA::Boolean GetUseDelauney();
 

src/NETGENPlugin/NETGENPlugin_Mesher.cxx

@@ -599,20 +599,22 @@ void NETGENPlugin_Mesher::SetDefaultParameters()
   _fineness               = NETGENPlugin_Hypothesis::GetDefaultFineness();
   mparams.uselocalh       = NETGENPlugin_Hypothesis::GetDefaultSurfaceCurvature();
   netgen::merge_solids    = NETGENPlugin_Hypothesis::GetDefaultFuseEdges();
+  // Unused argument but set 0 to initialise it
+  mparams.elementorder = 0;
 
 #ifdef NETGEN_V6
 
-  mparams.nthreads = std::thread::hardware_concurrency();
+  mparams.nthreads = NETGENPlugin_Hypothesis::GetDefaultNbThreads();
 
   if ( getenv( "SALOME_NETGEN_DISABLE_MULTITHREADING" ))
   {
     mparams.nthreads = 1;
     mparams.parallel_meshing = false;
   }
-
 #endif
 }
 
+
 //=============================================================================
 /*!
  * Pass parameters to NETGEN
@@ -655,6 +657,7 @@ void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_Hypothesis* hyp)
 #ifdef NETGEN_V6
     // std::string
     mparams.meshsizefilename = hyp->GetMeshSizeFile();
+    mparams.nthreads = hyp->GetNbThreads();
 #else
     // const char*
     mparams.meshsizefilename= hyp->GetMeshSizeFile().empty() ? 0 : hyp->GetMeshSizeFile().c_str();
@@ -4437,18 +4440,7 @@ NETGENPlugin_NetgenLibWrapper::NETGENPlugin_NetgenLibWrapper():
   _ngcerr           = NULL;
   if ( !getenv( "KEEP_NETGEN_OUTPUT" ))
   {
-    // redirect all netgen output (mycout,myerr,cout) to _outputFileName
+    setOutputFile(getOutputFileName());
-    _outputFileName = getOutputFileName();
-    _ngcout         = netgen::mycout;
-    _ngcerr         = netgen::myerr;
-    netgen::mycout  = new ofstream ( _outputFileName.c_str() );
-    netgen::myerr   = netgen::mycout;
-    _coutBuffer     = std::cout.rdbuf();
-#ifdef _DEBUG_
-    std::cout << "NOTE: netgen output is redirected to file " << _outputFileName << std::endl;
-#else
-    std::cout.rdbuf( netgen::mycout->rdbuf() );
-#endif
   }
 
   setMesh( Ng_NewMesh() );
@@ -4507,6 +4499,9 @@ int NETGENPlugin_NetgenLibWrapper::GenerateMesh( netgen::OCCGeometry& occgeo,
   if ( !ngMesh )
     ngMesh = new netgen::Mesh;
 
+  // To dump mparam
+  // netgen::mparam.Print(std::cerr);
+
 #ifdef NETGEN_V6
 
   ngMesh->SetGeometry( shared_ptr<netgen::NetgenGeometry>( &occgeo, &NOOP_Deleter ));
@@ -4569,6 +4564,27 @@ std::string NETGENPlugin_NetgenLibWrapper::getOutputFileName()
 
   return aGenericName.ToCString();
 }
+//================================================================================
+/*!
+ * \brief Set output file name for netgen log
+ */
+//================================================================================
+
+void NETGENPlugin_NetgenLibWrapper::setOutputFile(std::string outputfile)
+{
+  // redirect all netgen output (mycout,myerr,cout) to _outputFileName
+  _outputFileName = outputfile;
+  _ngcout         = netgen::mycout;
+  _ngcerr         = netgen::myerr;
+  netgen::mycout  = new ofstream ( _outputFileName.c_str() );
+  netgen::myerr   = netgen::mycout;
+  _coutBuffer     = std::cout.rdbuf();
+#ifdef _DEBUG_
+  std::cout << "NOTE: netgen output is redirected to file " << _outputFileName << std::endl;
+#else
+  std::cout.rdbuf( netgen::mycout->rdbuf() );
+#endif
+}
 
 //================================================================================
 /*!

src/NETGENPlugin/NETGENPlugin_Mesher.hxx

@@ -92,16 +92,20 @@ struct NETGENPLUGIN_EXPORT NETGENPlugin_NetgenLibWrapper
   void setMesh( nglib::Ng_Mesh* mesh );
   nglib::Ng_Mesh* ngMesh() { return (nglib::Ng_Mesh*)(void*)_ngMesh; }
 
+
+
   static int GenerateMesh(netgen::OCCGeometry& occgeo, int startWith, int endWith,
                           netgen::Mesh* & ngMesh);
   int GenerateMesh(netgen::OCCGeometry& occgeo, int startWith, int endWith )
   {
     return GenerateMesh( occgeo, startWith, endWith, _ngMesh );
   }
+
   static void CalcLocalH( netgen::Mesh * ngMesh );
 
   static void RemoveTmpFiles();
   static int& instanceCounter();
+  void setOutputFile(std::string);
 
  private:
   std::string getOutputFileName();

src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx

@@ -45,6 +45,8 @@
 #include <StdMeshers_MaxElementVolume.hxx>
 #include <StdMeshers_QuadToTriaAdaptor.hxx>
 #include <StdMeshers_ViscousLayers.hxx>
+#include <SMESH_subMesh.hxx>
+
 
 #include <BRepGProp.hxx>
 #include <BRep_Tool.hxx>
@@ -63,6 +65,8 @@
 #include <vector>
 #include <map>
 
+#include <cstdlib>
+
 /*
   Netgen include files
 */
@@ -143,8 +147,8 @@ bool NETGENPlugin_NETGEN_3D::CheckHypothesis (SMESH_Mesh&         aMesh,
   _maxElementVolume = DBL_MAX;
 
   // for correct work of GetProgress():
-  netgen::multithread.percent = 0.;
+  //netgen::multithread.percent = 0.;
-  netgen::multithread.task = "Volume meshing";
+  //netgen::multithread.task = "Volume meshing";
   _progressByTic = -1.;
 
   list<const SMESHDS_Hypothesis*>::const_iterator itl;
@@ -186,71 +190,41 @@ bool NETGENPlugin_NETGEN_3D::CheckHypothesis (SMESH_Mesh&         aMesh,
   return aStatus == HYP_OK;
 }
 
+
+
 //=============================================================================
 /*!
  *Here we are going to use the NETGEN mesher
  */
 //=============================================================================
 
-bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh&         aMesh,
-                                     const TopoDS_Shape& aShape)
-{
-  netgen::multithread.terminate = 0;
-  netgen::multithread.task = "Volume meshing";
-  _progressByTic = -1.;
 
+/**
+ * @brief Compute the list of already meshed Surface elements and info
+ *        on their orientation and if they are internal
+ *
+ * @param aMesh Global Mesh
+ * @param aShape Shape associated to the mesh
+ * @param proxyMesh pointer to mesh used fo find the elements
+ * @param internals information on internal sub shapes
+ * @param helper helper associated to the mesh
+ * @param listElements map of surface element associated with
+ *                     their orientation and internal status
+ * @return true if their was some error
+ */
+bool NETGENPlugin_NETGEN_3D::getSurfaceElements(
+    SMESH_Mesh&         aMesh,
+    const TopoDS_Shape& aShape,
+    SMESH_ProxyMesh::Ptr proxyMesh,
+    NETGENPlugin_Internals &internals,
+    SMESH_MesherHelper &helper,
+    std::map<const SMDS_MeshElement*, tuple<bool, bool>, TIDCompare>& listElements
+)
+{
   SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
-
-  SMESH_MesherHelper helper(aMesh);
-  _quadraticMesh = helper.IsQuadraticSubMesh(aShape);
-  helper.SetElementsOnShape( true );
-
-  int Netgen_NbOfNodes = 0;
-  double Netgen_point[3];
-  int Netgen_triangle[3];
-
-  NETGENPlugin_NetgenLibWrapper ngLib;
-  Ng_Mesh * Netgen_mesh = (Ng_Mesh*)ngLib._ngMesh;
-
-  // vector of nodes in which node index == netgen ID
-  vector< const SMDS_MeshNode* > nodeVec;
-  {
-    const int invalid_ID = -1;
-
-    SMESH::Controls::Area areaControl;
-    SMESH::Controls::TSequenceOfXYZ nodesCoords;
-
-    // maps nodes to ng ID
-    typedef map< const SMDS_MeshNode*, int, TIDCompare > TNodeToIDMap;
-    typedef TNodeToIDMap::value_type                     TN2ID;
-    TNodeToIDMap nodeToNetgenID;
-
-    // find internal shapes
-    NETGENPlugin_Internals internals( aMesh, aShape, /*is3D=*/true );
-
-    // ---------------------------------
-    // Feed the Netgen with surface mesh
-    // ---------------------------------
-
   TopAbs_ShapeEnum mainType = aMesh.GetShapeToMesh().ShapeType();
   bool checkReverse = ( mainType == TopAbs_COMPOUND || mainType == TopAbs_COMPSOLID );
 
-    SMESH_ProxyMesh::Ptr proxyMesh( new SMESH_ProxyMesh( aMesh ));
-    if ( _viscousLayersHyp )
-    {
-      netgen::multithread.percent = 3;
-      proxyMesh = _viscousLayersHyp->Compute( aMesh, aShape );
-      if ( !proxyMesh )
-        return false;
-    }
-    if ( aMesh.NbQuadrangles() > 0 )
-    {
-      netgen::multithread.percent = 6;
-      StdMeshers_QuadToTriaAdaptor* Adaptor = new StdMeshers_QuadToTriaAdaptor;
-      Adaptor->Compute(aMesh,aShape,proxyMesh.get());
-      proxyMesh.reset( Adaptor );
-    }
-
   for ( TopExp_Explorer exFa( aShape, TopAbs_FACE ); exFa.More(); exFa.Next())
   {
     const TopoDS_Shape& aShapeFace = exFa.Current();
@@ -276,15 +250,107 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh&         aMesh,
 
       iteratorElem = aSubMeshDSFace->GetElements();
     }
-      while ( iteratorElem->more() ) // loop on elements on a geom face
+    while(iteratorElem->more()){
-      {
-        // check mesh face
       const SMDS_MeshElement* elem = iteratorElem->next();
-        if ( !elem )
+      // check mesh face
+      if ( !elem ){
         return error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
-        if ( elem->NbCornerNodes() != 3 )
+      }
+      if ( elem->NbCornerNodes() != 3 ){
         return error( COMPERR_BAD_INPUT_MESH, "Not triangle element encounters");
+      }
+      listElements[elem] = tuple(isRev, isInternalFace);
+    }
+  }
 
+  return false;
+}
+
+/**
+ * @brief Part of Compute: adding already meshed elements
+ *        into netgen structure
+ *
+ * @param aMesh Global mesh
+ * @param aShape Shape associated with the mesh
+ * @param nodeVec Mapping between nodes mesh id and netgen structure id
+ * @param ngLib Wrapper on netgen lib
+ * @param helper helper assocaited to the mesh
+ * @param Netgen_NbOfNodes Number of nodes in netge structure
+ * @return true if there was some error
+ */
+
+bool NETGENPlugin_NETGEN_3D::computeFillNgMesh(
+  SMESH_Mesh&         aMesh,
+  const TopoDS_Shape& aShape,
+  vector< const SMDS_MeshNode* > &nodeVec,
+  NETGENPlugin_NetgenLibWrapper &ngLib,
+  SMESH_MesherHelper &helper,
+  int &Netgen_NbOfNodes)
+{
+  netgen::multithread.terminate = 0;
+  netgen::multithread.task = "Volume meshing";
+  _progressByTic = -1.;
+
+  SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
+
+  _quadraticMesh = helper.IsQuadraticSubMesh(aShape);
+  helper.SetElementsOnShape( true );
+
+  Netgen_NbOfNodes = 0;
+  double Netgen_point[3];
+  int Netgen_triangle[3];
+
+  Ng_Mesh * Netgen_mesh = (Ng_Mesh*)ngLib._ngMesh;
+
+  {
+    const int invalid_ID = -1;
+
+    SMESH::Controls::Area areaControl;
+    SMESH::Controls::TSequenceOfXYZ nodesCoords;
+
+    // maps nodes to ng ID
+    // map must be sorted by ID to ensure that we will have the same number of
+    // 3D element if we recompute
+    typedef map< const SMDS_MeshNode*, int, TIDCompare > TNodeToIDMap;
+    typedef TNodeToIDMap::value_type                     TN2ID;
+    TNodeToIDMap nodeToNetgenID;
+
+    // find internal shapes
+    NETGENPlugin_Internals internals( aMesh, aShape, /*is3D=*/true );
+
+    // ---------------------------------
+    // Feed the Netgen with surface mesh
+    // ---------------------------------
+    bool isRev=false;
+    bool isInternalFace=false;
+
+    SMESH_ProxyMesh::Ptr proxyMesh( new SMESH_ProxyMesh( aMesh ));
+    if ( _viscousLayersHyp )
+    {
+      netgen::multithread.percent = 3;
+      proxyMesh = _viscousLayersHyp->Compute( aMesh, aShape );
+      if ( !proxyMesh )
+        return false;
+    }
+    if ( aMesh.NbQuadrangles() > 0 )
+    {
+      netgen::multithread.percent = 6;
+      StdMeshers_QuadToTriaAdaptor* Adaptor = new StdMeshers_QuadToTriaAdaptor;
+      Adaptor->Compute(aMesh,aShape,proxyMesh.get());
+      proxyMesh.reset( Adaptor );
+    }
+
+    // map must be sorted by ID to ensure that we will have the same number of
+    // 3D element if we recompute
+    std::map<const SMDS_MeshElement*, tuple<bool, bool>, TIDCompare> listElements;
+    bool ret = getSurfaceElements(aMesh, aShape, proxyMesh, internals, helper, listElements);
+    if(ret)
+      return ret;
+
+    for ( auto const& [elem, info] : listElements ) // loop on elements on a geom face
+    {
+      isRev = get<0>(info);
+      isInternalFace = get<1>(info);
       // Add nodes of triangles and triangles them-selves to netgen mesh
 
       // add three nodes of triangle
@@ -326,7 +392,6 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh&         aMesh,
         Ng_AddSurfaceElement(Netgen_mesh, NG_TRIG, Netgen_triangle);
       }
     } // loop on elements on a face
-    } // loop on faces of a SOLID or SHELL
 
     // insert old nodes into nodeVec
     nodeVec.resize( nodeToNetgenID.size() + 1, 0 );
@@ -344,85 +409,238 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh&         aMesh,
                                                    internals);
     }
   }
-
+  Netgen_NbOfNodes = Ng_GetNP( Netgen_mesh );
-  // -------------------------
+  return false;
-  // Generate the volume mesh
-  // -------------------------
-
-  return ( ngLib._isComputeOk = compute( aMesh, helper, nodeVec, ngLib ));
 }
 
-// namespace
+/**
-// {
+ * @brief Part of Compute: Setting the netgen parameters from the Hypothesis
-//   void limitVolumeSize( netgen::Mesh* ngMesh,
+ *
-//                         double        maxh )
+ * @param aMesh Global mesh
-//   {
+ * @param ngLib Wrapper on netgen lib
-//     // get average h of faces
+ * @param occgeo Mapping between nodes mesh id and netgen structure id
-//     double faceh = 0;
+ * @param helper helper assocaited to the mesh
-//     int nbh = 0;
+ * @param endWith end step of netgen
-//     for (int i = 1; i <= ngMesh->GetNSE(); i++)
+ * @return true if there was some error
-//     {
+ */
-//       const netgen::Element2d& face = ngMesh->SurfaceElement(i);
+bool NETGENPlugin_NETGEN_3D::computePrepareParam(
-//       for (int j=1; j <= face.GetNP(); ++j)
+  SMESH_Mesh&         aMesh,
-//       {
+  NETGENPlugin_NetgenLibWrapper &ngLib,
-//         const netgen::PointIndex & i1 = face.PNumMod(j);
+  netgen::OCCGeometry &occgeo,
-//         const netgen::PointIndex & i2 = face.PNumMod(j+1);
+  SMESH_MesherHelper &helper,
-//         if ( i1 < i2 )
+  int &endWith)
-//         {
-//           const netgen::Point3d & p1 = ngMesh->Point( i1 );
-//           const netgen::Point3d & p2 = ngMesh->Point( i2 );
-//           faceh += netgen::Dist2( p1, p2 );
-//           nbh++;
-//         }
-//       }
-//     }
-//     faceh = Sqrt( faceh / nbh );
 
-//     double compareh;
+{
-//     if      ( faceh < 0.5 * maxh ) compareh = -1;
+  netgen::multithread.terminate = 0;
-//     else if ( faceh > 1.5 * maxh ) compareh = 1;
-//     else                           compareh = 0;
-//     // cerr << "faceh " << faceh << endl;
-//     // cerr << "init maxh " << maxh << endl;
-//     // cerr << "compareh " << compareh << endl;
 
-//     if ( compareh > 0 )
+  netgen::Mesh* ngMesh = ngLib._ngMesh;
-//       maxh *= 1.2;
-//     else
-//       maxh *= 0.8;
-//     // cerr << "maxh " << maxh << endl;
 
-//     // get bnd box
+  NETGENPlugin_Mesher aMesher( &aMesh, helper.GetSubShape(), /*isVolume=*/true );
-//     netgen::Point3d pmin, pmax;
-//     ngMesh->GetBox( pmin, pmax, 0 );
-//     const double dx = pmax.X() - pmin.X();
-//     const double dy = pmax.Y() - pmin.Y();
-//     const double dz = pmax.Z() - pmin.Z();
 
-//     if ( ! & ngMesh->LocalHFunction() )
-//       ngMesh->SetLocalH( pmin, pmax, compareh <= 0 ? 0.1 : 0.5 );
 
-//     // adjusted by SALOME_TESTS/Grids/smesh/bugs_08/I8
+  if ( _hypParameters )
-//     const int nbX = Max( 2, int( dx / maxh * 2 ));
+  {
-//     const int nbY = Max( 2, int( dy / maxh * 2 ));
+    aMesher.SetParameters( _hypParameters );
-//     const int nbZ = Max( 2, int( dz / maxh * 2 ));
 
-//     netgen::Point3d p;
+    if ( !_hypParameters->GetLocalSizesAndEntries().empty() ||
-//     for ( int i = 0; i <= nbX; ++i )
+         !_hypParameters->GetMeshSizeFile().empty() )
-//     {
+    {
-//       p.X() = pmin.X() +  i * dx / nbX;
+      if ( ! &ngMesh->LocalHFunction() )
-//       for ( int j = 0; j <= nbY; ++j )
+      {
-//       {
+        netgen::Point3d pmin, pmax;
-//         p.Y() = pmin.Y() +  j * dy / nbY;
+        ngMesh->GetBox( pmin, pmax, 0 );
-//         for ( int k = 0; k <= nbZ; ++k )
+        ngMesh->SetLocalH( pmin, pmax, _hypParameters->GetGrowthRate() );
-//         {
+      }
-//           p.Z() = pmin.Z() +  k * dz / nbZ;
+      aMesher.SetLocalSize( occgeo, *ngMesh );
-//           ngMesh->RestrictLocalH( p, maxh );
+
-//         }
+      try {
-//       }
+        ngMesh->LoadLocalMeshSize( netgen::mparam.meshsizefilename );
-//     }
+      } catch (netgen::NgException & ex) {
-//   }
+        return error( COMPERR_BAD_PARMETERS, ex.What() );
-// }
+      }
+    }
+    if ( !_hypParameters->GetOptimize() )
+      endWith = netgen::MESHCONST_MESHVOLUME;
+  }
+  else if ( _hypMaxElementVolume )
+  {
+    netgen::mparam.maxh = pow( 72, 1/6. ) * pow( _maxElementVolume, 1/3. );
+    // limitVolumeSize( ngMesh, mparam.maxh ); // result is unpredictable
+  }
+  else if ( aMesh.HasShapeToMesh() )
+  {
+    aMesher.PrepareOCCgeometry( occgeo, helper.GetSubShape(), aMesh );
+    netgen::mparam.maxh = occgeo.GetBoundingBox().Diam()/2;
+  }
+  else
+  {
+    netgen::Point3d pmin, pmax;
+    ngMesh->GetBox (pmin, pmax);
+    netgen::mparam.maxh = Dist(pmin, pmax)/2;
+  }
+
+  if ( !_hypParameters && aMesh.HasShapeToMesh() )
+  {
+    netgen::mparam.minh = aMesher.GetDefaultMinSize( helper.GetSubShape(), netgen::mparam.maxh );
+  }
+  return false;
+}
+
+/**
+ * @brief Part of Compute: call to the netgen mesher
+ *
+ * @param occgeo netgen geometry structure
+ * @param nodeVec Mapping between nodes mesh id and netgen structure id
+ * @param ngMesh netgen mesh structure
+ * @param ngLib Wrapper on netgen lib
+ * @param startWith starting step of netgen
+ * @param endWith end step of netgen
+ * @return true if there was some error
+ */
+bool NETGENPlugin_NETGEN_3D::computeRunMesher(
+  netgen::OCCGeometry &occgeo,
+  vector< const SMDS_MeshNode* > &nodeVec,
+  netgen::Mesh* ngMesh,
+  NETGENPlugin_NetgenLibWrapper &ngLib,
+  int &startWith, int &endWith)
+{
+  int err = 1;
+
+  try
+  {
+    OCC_CATCH_SIGNALS;
+
+    ngLib.CalcLocalH(ngMesh);
+    err = ngLib.GenerateMesh(occgeo, startWith, endWith);
+
+    if(netgen::multithread.terminate)
+      return false;
+    if ( err ){
+      error(SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task);
+    }
+  }
+  catch (Standard_Failure& ex)
+  {
+    SMESH_Comment str("Exception in  netgen::OCCGenerateMesh()");
+    str << " at " << netgen::multithread.task
+        << ": " << ex.DynamicType()->Name();
+    if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
+      str << ": " << ex.GetMessageString();
+    error(str);
+  }
+  catch (netgen::NgException& exc)
+  {
+    SMESH_Comment str("NgException");
+    if ( strlen( netgen::multithread.task ) > 0 )
+      str << " at " << netgen::multithread.task;
+    str << ": " << exc.What();
+    error(str);
+  }
+  catch (...)
+  {
+    SMESH_Comment str("Exception in  netgen::OCCGenerateMesh()");
+    if ( strlen( netgen::multithread.task ) > 0 )
+      str << " at " << netgen::multithread.task;
+    error(str);
+  }
+
+  if ( err )
+  {
+    SMESH_ComputeErrorPtr ce = NETGENPlugin_Mesher::ReadErrors(nodeVec);
+    if ( ce && ce->HasBadElems() ){
+      error( ce );
+    }
+  }
+
+  return false;
+}
+
+/**
+ * @brief Part of Compute: Adding new element created by mesher to SMESH_Mesh
+ *
+ * @param nodeVec Mapping between nodes mesh id and netgen structure id
+ * @param ngLib Wrapper on netgen lib
+ * @param helper tool associated to the mesh to add element
+ * @param Netgen_NbOfNodes Number of nodes in netgen structure
+ * @return true if there was some error
+ */
+bool NETGENPlugin_NETGEN_3D::computeFillMesh(
+  vector< const SMDS_MeshNode* > &nodeVec,
+  NETGENPlugin_NetgenLibWrapper &ngLib,
+  SMESH_MesherHelper &helper,
+  int &Netgen_NbOfNodes
+  )
+{
+  Ng_Mesh* Netgen_mesh = ngLib.ngMesh();
+
+  int Netgen_NbOfNodesNew = Ng_GetNP(Netgen_mesh);
+  int Netgen_NbOfTetra    = Ng_GetNE(Netgen_mesh);
+
+  bool isOK = ( /*status == NG_OK &&*/ Netgen_NbOfTetra > 0 );// get whatever built
+  if ( isOK )
+  {
+    double Netgen_point[3];
+    int    Netgen_tetrahedron[4];
+
+    // create and insert new nodes into nodeVec
+    nodeVec.resize( Netgen_NbOfNodesNew + 1, 0 );
+    int nodeIndex = Netgen_NbOfNodes + 1;
+    for ( ; nodeIndex <= Netgen_NbOfNodesNew; ++nodeIndex )
+    {
+      Ng_GetPoint( Netgen_mesh, nodeIndex, Netgen_point );
+      nodeVec.at(nodeIndex) = helper.AddNode(Netgen_point[0], Netgen_point[1], Netgen_point[2]);
+    }
+
+    // create tetrahedrons
+    for ( int elemIndex = 1; elemIndex <= Netgen_NbOfTetra; ++elemIndex )
+    {
+      Ng_GetVolumeElement(Netgen_mesh, elemIndex, Netgen_tetrahedron);
+      try
+      {
+        helper.AddVolume (nodeVec.at( Netgen_tetrahedron[0] ),
+                          nodeVec.at( Netgen_tetrahedron[1] ),
+                          nodeVec.at( Netgen_tetrahedron[2] ),
+                          nodeVec.at( Netgen_tetrahedron[3] ));
+      }
+      catch (...)
+      {
+      }
+    }
+  }
+  return false;
+}
+
+
+/**
+ * @brief Compute mesh associate to shape
+ *
+ * @param aMesh The mesh
+ * @param aShape The shape
+ * @return true fi there are some error
+ */
+bool NETGENPlugin_NETGEN_3D::Compute(
+  SMESH_Mesh&         aMesh,
+  const TopoDS_Shape& aShape)
+{
+  // vector of nodes in which node index == netgen ID
+  vector< const SMDS_MeshNode* > nodeVec;
+  NETGENPlugin_NetgenLibWrapper ngLib;
+  SMESH_MesherHelper helper(aMesh);
+  int startWith = netgen::MESHCONST_MESHVOLUME;
+  int endWith   = netgen::MESHCONST_OPTVOLUME;
+  int Netgen_NbOfNodes;
+
+  computeFillNgMesh(aMesh, aShape, nodeVec, ngLib, helper, Netgen_NbOfNodes);
+
+  netgen::OCCGeometry occgeo;
+  computePrepareParam(aMesh, ngLib, occgeo, helper, endWith);
+  computeRunMesher(occgeo, nodeVec, ngLib._ngMesh, ngLib, startWith, endWith);
+
+  computeFillMesh(nodeVec, ngLib, helper, Netgen_NbOfNodes);
+
+  return false;
+
+}
 
 //================================================================================
 /*!
@@ -475,7 +693,7 @@ bool NETGENPlugin_NETGEN_3D::compute(SMESH_Mesh&                     aMesh,
   else if ( _hypMaxElementVolume )
   {
     netgen::mparam.maxh = pow( 72, 1/6. ) * pow( _maxElementVolume, 1/3. );
-    // limitVolumeSize( ngMesh, netgen::mparam.maxh ); // result is unpredictable
+    // limitVolumeSize( ngMesh, mparam.maxh ); // result is unpredictable
   }
   else if ( aMesh.HasShapeToMesh() )
   {
@@ -701,14 +919,12 @@ double NETGENPlugin_NETGEN_3D::GetProgress() const
          strncmp( netgen::multithread.task, volMeshing, 3 ) == 0 ))
   {
     res = 0.001 + meshingRatio * netgen::multithread.percent / 100.;
-    //cout << netgen::multithread.task << " " <<_progressTic << "-" << netgen::multithread.percent << endl;
   }
   else // different otimizations
   {
     if ( _progressByTic < 0. )
       ((NETGENPlugin_NETGEN_3D*)this)->_progressByTic = meshingRatio / _progressTic;
     res = _progressByTic * _progressTic;
-    //cout << netgen::multithread.task << " " << _progressTic << " " << res << endl;
   }
   return Min ( res, 0.98 );
 }

src/NETGENPlugin/NETGENPlugin_NETGEN_3D.hxx

@@ -37,10 +37,15 @@
 #include "SMESH_Algo.hxx"
 #include "Utils_SALOME_Exception.hxx"
 
+#include <vector>
+#include <tuple>
+
 class StdMeshers_ViscousLayers;
 class StdMeshers_MaxElementVolume;
 class NETGENPlugin_Hypothesis;
 class NETGENPlugin_NetgenLibWrapper;
+class netgen_params;
+class SMDS_MeshNode;
 
 class NETGENPLUGIN_EXPORT NETGENPlugin_NETGEN_3D: public SMESH_3D_Algo
 {
@@ -66,8 +71,44 @@ class NETGENPLUGIN_EXPORT NETGENPlugin_NETGEN_3D: public SMESH_3D_Algo
                         const TopoDS_Shape& aShape,
                         MapShapeNbElems& aResMap);
 
+  bool computeFillNgMesh(
+    SMESH_Mesh&         aMesh,
+    const TopoDS_Shape& aShape,
+    std::vector< const SMDS_MeshNode* > &nodeVec,
+    NETGENPlugin_NetgenLibWrapper &ngLib,
+    SMESH_MesherHelper &helper,
+    int &Netgen_NbOfNodes);
+
+  bool computePrepareParam(
+    SMESH_Mesh&         aMesh,
+    NETGENPlugin_NetgenLibWrapper &ngLib,
+    netgen::OCCGeometry &occgeo,
+    SMESH_MesherHelper &helper,
+    int &endWith);
+
+  bool computeRunMesher(
+    netgen::OCCGeometry &occgeo,
+    std::vector< const SMDS_MeshNode* > &nodeVec,
+    netgen::Mesh* ngMesh,
+    NETGENPlugin_NetgenLibWrapper &ngLib,
+    int &startWith, int &endWith);
+
+  bool computeFillMesh(
+    std::vector< const SMDS_MeshNode* > &nodeVec,
+    NETGENPlugin_NetgenLibWrapper &ngLib,
+    SMESH_MesherHelper &helper,
+    int &Netgen_NbOfNodes);
+
  protected:
 
+  virtual bool getSurfaceElements(
+    SMESH_Mesh&         aMesh,
+    const TopoDS_Shape& aShape,
+    SMESH_ProxyMesh::Ptr proxyMesh,
+    NETGENPlugin_Internals &internals,
+    SMESH_MesherHelper &helper,
+    std::map<const SMDS_MeshElement*, std::tuple<bool, bool>, TIDCompare>& listElements);
+
   bool compute(SMESH_Mesh&                          mesh,
                SMESH_MesherHelper&                  helper,
                std::vector< const SMDS_MeshNode* >& nodeVec,

src/NETGENPlugin/NETGENPlugin_NETGEN_3D_Remote.cxx

@@ -0,0 +1,393 @@
+// Copyright (C) 2007-2022  CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+
+//=============================================================================
+// File      : NETGENPlugin_NETGEN_3D_Remote.cxx
+// Created   : lundi 19 Septembre 2022
+// Author    : Yoann AUDOUIN (CEA)
+// Project   : SALOME
+//=============================================================================
+//
+//
+#include "NETGENPlugin_NETGEN_3D_Remote.hxx"
+
+#include "NETGENPlugin_NETGEN_3D.hxx"
+
+#include "NETGENPlugin_DriverParam.hxx"
+#include "NETGENPlugin_Hypothesis.hxx"
+
+#include "Utils_SALOME_Exception.hxx"
+
+#include <SMESH_Gen.hxx>
+#include <SMESH_Mesh.hxx>
+#include <SMESH_MesherHelper.hxx>
+#include <SMESH_DriverShape.hxx>
+#include <SMESH_DriverMesh.hxx>
+#include <SMESHDS_Mesh.hxx>
+#include <SMESH_MeshLocker.hxx>
+
+#include <QString>
+#include <QProcess>
+
+#ifdef WIN32
+#include <filesystem>
+namespace fs = std::filesystem;
+#else
+#include <boost/filesystem.hpp>
+namespace fs = boost::filesystem;
+#endif
+
+/*
+  Netgen include files
+*/
+
+#ifndef OCCGEOMETRY
+#define OCCGEOMETRY
+#endif
+#include <occgeom.hpp>
+
+#ifdef NETGEN_V5
+#include <ngexception.hpp>
+#endif
+#ifdef NETGEN_V6
+#include <core/exception.hpp>
+#endif
+
+namespace nglib {
+#include <nglib.h>
+}
+namespace netgen {
+
+  NETGENPLUGIN_DLL_HEADER
+  extern MeshingParameters mparam;
+
+  NETGENPLUGIN_DLL_HEADER
+  extern volatile multithreadt multithread;
+}
+using namespace nglib;
+
+//=============================================================================
+/*!
+ * Constructor
+ */
+//=============================================================================
+
+NETGENPlugin_NETGEN_3D_Remote::NETGENPlugin_NETGEN_3D_Remote(int hypId, SMESH_Gen * gen)
+  : NETGENPlugin_NETGEN_3D(hypId, gen)
+{
+  _name = "NETGEN_3D_Remote";
+}
+
+//=============================================================================
+/*!
+ * Destructor
+ */
+//=============================================================================
+
+NETGENPlugin_NETGEN_3D_Remote::~NETGENPlugin_NETGEN_3D_Remote()
+{
+}
+
+/**
+ * @brief Fill the structure netgen_param with the information from the hypothesis
+ *
+ * @param hyp the hypothesis
+ * @param aParams the netgen_param structure
+ */
+void NETGENPlugin_NETGEN_3D_Remote::fillParameters(const NETGENPlugin_Hypothesis* hyp, netgen_params &aParams)
+{
+  aParams.maxh               = hyp->GetMaxSize();
+  aParams.minh               = hyp->GetMinSize();
+  aParams.segmentsperedge    = hyp->GetNbSegPerEdge();
+  aParams.grading            = hyp->GetGrowthRate();
+  aParams.curvaturesafety    = hyp->GetNbSegPerRadius();
+  aParams.secondorder        = hyp->GetSecondOrder() ? 1 : 0;
+  aParams.quad               = hyp->GetQuadAllowed() ? 1 : 0;
+  aParams.optimize           = hyp->GetOptimize();
+  aParams.fineness           = hyp->GetFineness();
+  aParams.uselocalh          = hyp->GetSurfaceCurvature();
+  aParams.merge_solids       = hyp->GetFuseEdges();
+  aParams.chordalError       = hyp->GetChordalErrorEnabled() ? hyp->GetChordalError() : -1.;
+  aParams.optsteps2d         = aParams.optimize ? hyp->GetNbSurfOptSteps() : 0;
+  aParams.optsteps3d         = aParams.optimize ? hyp->GetNbVolOptSteps()  : 0;
+  aParams.elsizeweight       = hyp->GetElemSizeWeight();
+  aParams.opterrpow          = hyp->GetWorstElemMeasure();
+  aParams.delaunay           = hyp->GetUseDelauney();
+  aParams.checkoverlap       = hyp->GetCheckOverlapping();
+  aParams.checkchartboundary = hyp->GetCheckChartBoundary();
+#ifdef NETGEN_V6
+  // std::string
+  aParams.meshsizefilename = hyp->GetMeshSizeFile();
+  aParams.closeedgefac = 2;
+  aParams.nbThreads = hyp->GetNbThreads();
+#else
+  // const char*
+  aParams.meshsizefilename = hyp->GetMeshSizeFile();
+  aParams.closeedgefac = 0;
+#endif
+}
+
+//
+
+/**
+ * @brief write in a binary file the orientation for each surface element of the mesh
+ *
+ * @param aMesh The mesh
+ * @param aShape the shape associated to the mesh
+ * @param output_file name of the binary file
+ */
+void NETGENPlugin_NETGEN_3D_Remote::exportElementOrientation(SMESH_Mesh& aMesh,
+                                                      const TopoDS_Shape& aShape,
+                                                      const std::string output_file)
+{
+  SMESH_MesherHelper helper(aMesh);
+  NETGENPlugin_Internals internals( aMesh, aShape, /*is3D=*/true );
+  SMESH_ProxyMesh::Ptr proxyMesh( new SMESH_ProxyMesh( aMesh ));
+  std::map<vtkIdType, bool> elemOrientation;
+
+  for ( TopExp_Explorer exFa( aShape, TopAbs_FACE ); exFa.More(); exFa.Next())
+  {
+    const TopoDS_Shape& aShapeFace = exFa.Current();
+    int faceID = aMesh.GetMeshDS()->ShapeToIndex( aShapeFace );
+    bool isInternalFace = internals.isInternalShape( faceID );
+    bool isRev = false;
+    if ( !isInternalFace &&
+          helper.NbAncestors(aShapeFace, aMesh, aShape.ShapeType()) > 1 )
+      // IsReversedSubMesh() can work wrong on strongly curved faces,
+      // so we use it as less as possible
+      isRev = helper.IsReversedSubMesh( TopoDS::Face( aShapeFace ));
+
+    const SMESHDS_SubMesh * aSubMeshDSFace = proxyMesh->GetSubMesh( aShapeFace );
+    if ( !aSubMeshDSFace ) continue;
+
+    SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
+    if ( _quadraticMesh &&
+          dynamic_cast< const SMESH_ProxyMesh::SubMesh*>( aSubMeshDSFace ))
+    {
+      // add medium nodes of proxy triangles to helper (#16843)
+      while ( iteratorElem->more() )
+        helper.AddTLinks( static_cast< const SMDS_MeshFace* >( iteratorElem->next() ));
+
+      iteratorElem = aSubMeshDSFace->GetElements();
+    }
+    while ( iteratorElem->more() ) // loop on elements on a geom face
+    {
+      // check mesh face
+      const SMDS_MeshElement* elem = iteratorElem->next();
+      if ( !elem )
+        error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
+      if ( elem->NbCornerNodes() != 3 )
+        error( COMPERR_BAD_INPUT_MESH, "Not triangle element encounters");
+      elemOrientation[elem->GetID()] = isRev;
+    } // loop on elements on a face
+  } // loop on faces of a SOLID or SHELL
+
+  {
+    std::ofstream df(output_file, ios::out|ios::binary);
+    int size=elemOrientation.size();
+
+    df.write((char*)&size, sizeof(int));
+    for(auto const& [id, orient]:elemOrientation){
+      df.write((char*)&id, sizeof(vtkIdType));
+      df.write((char*)&orient, sizeof(bool));
+    }
+  }
+}
+
+/**
+ * @brief Compute mesh associate to shape
+ *
+ * @param aMesh The mesh
+ * @param aShape The shape
+ * @return true fi there are some error
+ */
+bool NETGENPlugin_NETGEN_3D_Remote::Compute(SMESH_Mesh&         aMesh,
+                                           const TopoDS_Shape& aShape)
+{
+  {
+    SMESH_MeshLocker myLocker(&aMesh);
+    SMESH_Hypothesis::Hypothesis_Status hypStatus;
+    NETGENPlugin_NETGEN_3D::CheckHypothesis(aMesh, aShape, hypStatus);
+  }
+
+
+  // Temporary folder for run
+#ifdef WIN32
+  fs::path tmp_folder = aMesh.tmp_folder / fs::path("Volume-%%%%-%%%%");
+#else
+  fs::path tmp_folder = aMesh.tmp_folder / fs::unique_path(fs::path("Volume-%%%%-%%%%"));
+#endif
+  fs::create_directories(tmp_folder);
+  // Using MESH2D generated after all triangles where created.
+  fs::path mesh_file=aMesh.tmp_folder / fs::path("Mesh2D.med");
+  fs::path element_orientation_file=tmp_folder / fs::path("element_orientation.dat");
+  fs::path new_element_file=tmp_folder / fs::path("new_elements.dat");
+  fs::path tmp_mesh_file=tmp_folder / fs::path("tmp_mesh.med");
+  // Not used kept for debug
+  //fs::path output_mesh_file=tmp_folder / fs::path("output_mesh.med");
+  fs::path shape_file=tmp_folder / fs::path("shape.brep");
+  fs::path param_file=tmp_folder / fs::path("netgen3d_param.txt");
+  fs::path log_file=tmp_folder / fs::path("run.log");
+  fs::path cmd_file=tmp_folder / fs::path("cmd.log");
+  std::string mesh_name = "MESH";
+
+  {
+    SMESH_MeshLocker myLocker(&aMesh);
+    //Writing Shape
+    SMESH_DriverShape::exportShape(shape_file.string(), aShape);
+
+    //Writing hypo
+    netgen_params aParams;
+    fillParameters(_hypParameters, aParams);
+
+    exportNetgenParams(param_file.string(), aParams);
+
+    // Exporting element orientation
+    exportElementOrientation(aMesh, aShape, element_orientation_file.string());
+  }
+
+  // Calling run_mesher
+  std::string cmd;
+  fs::path run_mesher_exe =
+    fs::path(std::getenv("NETGENPLUGIN_ROOT_DIR"))/
+    fs::path("bin")/
+    fs::path("salome")/
+#ifdef WIN32
+    fs::path("NETGENPlugin_Runner.exe");
+#else
+    fs::path("NETGENPlugin_Runner");
+#endif
+
+  cmd = run_mesher_exe.string() +
+                  " NETGEN3D " + mesh_file.string() + " "
+                               + shape_file.string() + " "
+                               + param_file.string() + " "
+                               + element_orientation_file.string() + " "
+                               + new_element_file.string() + " "
+                               + "NONE";
+  // Writing command in log
+  {
+    std::ofstream flog(cmd_file.string());
+    flog << cmd << endl;
+    flog << endl;
+  }
+  MESSAGE("Running command: ");
+  MESSAGE(cmd);
+
+
+  // Building arguments for QProcess
+  QString program = run_mesher_exe.string().c_str();
+  QStringList arguments;
+  arguments << "NETGEN3D";
+  arguments << mesh_file.string().c_str();
+  arguments << shape_file.string().c_str();
+  arguments << param_file.string().c_str();
+  arguments << element_orientation_file.string().c_str();
+  arguments << new_element_file.string().c_str();
+  arguments << "NONE";
+  QString out_file = log_file.string().c_str();
+  QProcess myProcess;
+  myProcess.setStandardOutputFile(out_file);
+
+  myProcess.start(program, arguments);
+  // Waiting for process to finish (argument -1 make it wait until the end of
+  // the process otherwise it just waits 30 seconds)
+  myProcess.waitForFinished(-1);
+  int ret = myProcess.exitStatus();
+
+  if(ret != 0){
+    // Run crahed
+    std::string msg = "Issue with command: \n";
+    msg += "See log for more details: " + log_file.string() + "\n";
+    msg += cmd + "\n";
+    throw SALOME_Exception(msg);
+  }
+
+  {
+    SMESH_MeshLocker myLocker(&aMesh);
+    std::ifstream df(new_element_file.string(), ios::binary);
+
+    int Netgen_NbOfNodes;
+    int Netgen_NbOfNodesNew;
+    int Netgen_NbOfTetra;
+    double Netgen_point[3];
+    int    Netgen_tetrahedron[4];
+    int nodeID;
+
+    SMESH_MesherHelper helper(aMesh);
+    // This function is mandatory for setElementsOnShape to work
+    helper.IsQuadraticSubMesh(aShape);
+    helper.SetElementsOnShape( true );
+
+    // Number of nodes in intial mesh
+    df.read((char*) &Netgen_NbOfNodes, sizeof(int));
+    // Number of nodes added by netgen
+    df.read((char*) &Netgen_NbOfNodesNew, sizeof(int));
+
+    // Filling nodevec (correspondence netgen numbering mesh numbering)
+    vector< const SMDS_MeshNode* > nodeVec ( Netgen_NbOfNodesNew + 1 );
+    //vector<int> nodeTmpVec ( Netgen_NbOfNodesNew + 1 );
+    SMESHDS_Mesh * meshDS = helper.GetMeshDS();
+    for (int nodeIndex = 1 ; nodeIndex <= Netgen_NbOfNodes; ++nodeIndex )
+    {
+      //Id of the point
+      df.read((char*) &nodeID, sizeof(int));
+      nodeVec.at(nodeIndex) = meshDS->FindNode(nodeID);
+    }
+
+    // Add new points and update nodeVec
+    for (int nodeIndex = Netgen_NbOfNodes +1 ; nodeIndex <= Netgen_NbOfNodesNew; ++nodeIndex )
+    {
+      df.read((char *) &Netgen_point, sizeof(double)*3);
+
+      nodeVec.at(nodeIndex) = helper.AddNode(Netgen_point[0],
+                                 Netgen_point[1],
+                                 Netgen_point[2]);
+    }
+
+    // Add tetrahedrons
+    df.read((char*) &Netgen_NbOfTetra, sizeof(int));
+
+    for ( int elemIndex = 1; elemIndex <= Netgen_NbOfTetra; ++elemIndex )
+    {
+      df.read((char*) &Netgen_tetrahedron, sizeof(int)*4);
+      helper.AddVolume(
+                    nodeVec.at( Netgen_tetrahedron[0] ),
+                    nodeVec.at( Netgen_tetrahedron[1] ),
+                    nodeVec.at( Netgen_tetrahedron[2] ),
+                    nodeVec.at( Netgen_tetrahedron[3] ));
+    }
+  }
+
+  return true;
+}
+
+/**
+ * @brief Assign submeshes to compute
+ *
+ * @param aSubMesh submesh to add
+ */
+void NETGENPlugin_NETGEN_3D_Remote::setSubMeshesToCompute(SMESH_subMesh * aSubMesh)
+{
+  SMESH_MeshLocker myLocker(aSubMesh->GetFather());
+  SMESH_Algo::setSubMeshesToCompute(aSubMesh);
+}

src/NETGENPlugin/NETGENPlugin_NETGEN_3D_Remote.hxx

@@ -0,0 +1,75 @@
+// Copyright (C) 2007-2021  CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+
+//=============================================================================
+// File      : NETGENPlugin_NETGEN_3D_Remote.hxx
+// Created   : lundi 19 Septembre 2022
+// Author    : Yoann AUDOUIN (EDF)
+// Project   : SALOME
+//=============================================================================
+//
+#ifndef _NETGENPlugin_NETGEN_3D_REMOTE_HXX_
+#define _NETGENPlugin_NETGEN_3D_REMOTE_HXX_
+
+#include "NETGENPlugin_NETGEN_3D.hxx"
+
+#include <vector>
+#include <map>
+
+class StdMeshers_ViscousLayers;
+class StdMeshers_MaxElementVolume;
+class NETGENPlugin_Hypothesis;
+class NETGENPlugin_NetgenLibWrapper;
+class netgen_params;
+class SMDS_MeshNode;
+
+using namespace std;
+
+class NETGENPLUGIN_EXPORT NETGENPlugin_NETGEN_3D_Remote: public NETGENPlugin_NETGEN_3D
+{
+ public:
+  NETGENPlugin_NETGEN_3D_Remote(int hypId, SMESH_Gen* gen);
+  virtual ~NETGENPlugin_NETGEN_3D_Remote();
+
+  // Function whould not be used with remote Computing
+  bool CheckHypothesis (SMESH_Mesh&         aMesh,
+                        const TopoDS_Shape& aShape,
+                        Hypothesis_Status&  aStatus) override {(void)aMesh;(void)aShape;aStatus = HYP_OK;return true;};
+
+  bool Compute(SMESH_Mesh&         aMesh,
+              const TopoDS_Shape& aShape) override;
+
+  void setSubMeshesToCompute(SMESH_subMesh * aSubMesh) override;
+
+
+ protected:
+  void exportElementOrientation(SMESH_Mesh& aMesh,
+                                const TopoDS_Shape& aShape,
+                                const std::string output_file);
+
+  void fillParameters(const NETGENPlugin_Hypothesis* hyp,
+                      netgen_params &aParams);
+
+
+};
+
+#endif

src/NETGENPlugin/NETGENPlugin_NETGEN_3D_Remote_i.cxx

@@ -0,0 +1,80 @@
+// Copyright (C) 2007-2022  CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+
+//  SMESH SMESH_I : idl implementation based on 'SMESH' unit's classes
+//  File   : NETGENPlugin_NETGEN_3D_Remote_i.cxx
+//  Author : Yoann AUDOUIN (EDF)
+//  Module : NETGENPlugin
+//  $Header$
+//
+#include "NETGENPlugin_NETGEN_3D_Remote_i.hxx"
+#include "SMESH_Gen.hxx"
+
+#include "Utils_CorbaException.hxx"
+#include "utilities.h"
+
+using namespace std;
+
+//=============================================================================
+/*!
+ *  NETGENPlugin_NETGEN_3D_Remote_i::NETGENPlugin_NETGEN_3D_Remote_i
+ *
+ *  Constructor
+ */
+//=============================================================================
+
+NETGENPlugin_NETGEN_3D_Remote_i::NETGENPlugin_NETGEN_3D_Remote_i( PortableServer::POA_ptr thePOA,
+                                                    ::SMESH_Gen*            theGenImpl )
+     : SALOME::GenericObj_i( thePOA ),
+       SMESH_Hypothesis_i( thePOA ),
+       SMESH_Algo_i( thePOA ),
+       SMESH_3D_Algo_i( thePOA )
+{
+  myBaseImpl = new ::NETGENPlugin_NETGEN_3D_Remote( theGenImpl->GetANewId(),
+                                             theGenImpl );
+}
+
+//=============================================================================
+/*!
+ *  NETGENPlugin_NETGEN_3D_Remote_i::~NETGENPlugin_NETGEN_3D_Remote_i
+ *
+ *  Destructor
+ */
+//=============================================================================
+
+NETGENPlugin_NETGEN_3D_Remote_i::~NETGENPlugin_NETGEN_3D_Remote_i()
+{
+}
+
+//=============================================================================
+/*!
+ *  NETGENPlugin_NETGEN_3D_Remote_i::GetImpl
+ *
+ *  Get implementation
+ */
+//=============================================================================
+
+::NETGENPlugin_NETGEN_3D_Remote* NETGENPlugin_NETGEN_3D_Remote_i::GetImpl()
+{
+  return ( ::NETGENPlugin_NETGEN_3D_Remote* )myBaseImpl;
+}
+

src/NETGENPlugin/NETGENPlugin_NETGEN_3D_Remote_i.hxx

@@ -0,0 +1,58 @@
+// Copyright (C) 2007-2021  CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+
+//  SMESH SMESH_I : idl implementation based on 'SMESH' unit's classes
+//  File   : NETGENPlugin_NETGEN_3D_Remote_i.hxx
+//  Author : Yoann AUDOUIN (EDF)
+//  Module : NETGENPlugin
+//  $Header$
+//
+#ifndef _NETGENPlugin_NETGEN_3D_REMOTE_I_HXX_
+#define _NETGENPlugin_NETGEN_3D_REMOTE_I_HXX_
+
+#include "NETGENPlugin_Defs.hxx"
+
+#include <SALOMEconfig.h>
+#include CORBA_SERVER_HEADER(NETGENPlugin_Algorithm)
+
+#include "SMESH_3D_Algo_i.hxx"
+#include "NETGENPlugin_NETGEN_3D_Remote.hxx"
+
+// ======================================================
+// NETGEN 3d algorithm
+// ======================================================
+class NETGENPLUGIN_EXPORT NETGENPlugin_NETGEN_3D_Remote_i:
+  public virtual POA_NETGENPlugin::NETGENPlugin_NETGEN_3D_Remote,
+  public virtual SMESH_3D_Algo_i
+{
+public:
+  // Constructor
+  NETGENPlugin_NETGEN_3D_Remote_i( PortableServer::POA_ptr thePOA,
+                            ::SMESH_Gen*            theGenImpl );
+  // Destructor
+  virtual ~NETGENPlugin_NETGEN_3D_Remote_i();
+
+  // Get implementation
+  ::NETGENPlugin_NETGEN_3D_Remote* GetImpl();
+};
+
+#endif

src/NETGENPlugin/NETGENPlugin_NETGEN_3D_SA.cxx

@@ -0,0 +1,399 @@
+// Copyright (C) 2007-2022  CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+
+//=============================================================================
+// File      : NETGENPlugin_NETGEN_3D_SA.cxx
+// Created   : lundi 19 Septembre 2022
+// Author    : Yoann AUDOUIN (CEA)
+// Project   : SALOME
+//=============================================================================
+//
+//
+#include "NETGENPlugin_NETGEN_3D_SA.hxx"
+
+#include "NETGENPlugin_DriverParam.hxx"
+#include "NETGENPlugin_Hypothesis.hxx"
+#include "StdMeshers_MaxElementVolume.hxx"
+
+#include <SMESH_Gen.hxx>
+#include <SMESH_Mesh.hxx>
+#include <SMESH_MesherHelper.hxx>
+#include <SMESH_DriverShape.hxx>
+#include <SMESH_DriverMesh.hxx>
+#include <SMESHDS_Mesh.hxx>
+
+
+#ifdef WIN32
+#include <filesystem>
+namespace fs = std::filesystem;
+#else
+#include <boost/filesystem.hpp>
+namespace fs = boost::filesystem;
+#endif
+
+/*
+  Netgen include files
+*/
+
+#ifndef OCCGEOMETRY
+#define OCCGEOMETRY
+#endif
+#include <occgeom.hpp>
+
+#ifdef NETGEN_V5
+#include <ngexception.hpp>
+#endif
+#ifdef NETGEN_V6
+#include <core/exception.hpp>
+#endif
+
+namespace nglib {
+#include <nglib.h>
+}
+namespace netgen {
+
+  NETGENPLUGIN_DLL_HEADER
+  extern MeshingParameters mparam;
+
+  NETGENPLUGIN_DLL_HEADER
+  extern volatile multithreadt multithread;
+}
+using namespace nglib;
+
+//=============================================================================
+/*!
+ * Constructor
+ */
+//=============================================================================
+
+NETGENPlugin_NETGEN_3D_SA::NETGENPlugin_NETGEN_3D_SA()
+  :  NETGENPlugin_NETGEN_3D(0, new SMESH_Gen())
+{
+  _name = "NETGEN_3D_SA";
+}
+
+//=============================================================================
+/*!
+ * Destructor
+ */
+//=============================================================================
+
+NETGENPlugin_NETGEN_3D_SA::~NETGENPlugin_NETGEN_3D_SA()
+{
+  if(_gen)
+    delete _gen;
+}
+
+/**
+ * @brief fill plugin hypothesis from the netgen_params structure
+ *
+ * @param aParams the structure
+ * @param gen SMESH_Gen associate with the SA
+ */
+void NETGENPlugin_NETGEN_3D_SA::fillHyp(netgen_params aParams)
+{
+  if(aParams.has_netgen_param){
+    NETGENPlugin_Hypothesis * hypParameters = new NETGENPlugin_Hypothesis(0, GetGen());
+
+    hypParameters->SetMaxSize(aParams.maxh);
+    hypParameters->SetMinSize(aParams.minh);
+    hypParameters->SetNbSegPerEdge(aParams.segmentsperedge);
+    hypParameters->SetGrowthRate(aParams.grading);
+    hypParameters->SetNbSegPerRadius(aParams.curvaturesafety);
+    hypParameters->SetSecondOrder(aParams.secondorder);
+    hypParameters->SetQuadAllowed(aParams.quad);
+    hypParameters->SetOptimize(aParams.optimize);
+    hypParameters->SetFineness((NETGENPlugin_Hypothesis::Fineness)aParams.fineness);
+    hypParameters->SetSurfaceCurvature(aParams.uselocalh);
+    hypParameters->SetFuseEdges(aParams.merge_solids);
+    hypParameters->SetChordalErrorEnabled(aParams.chordalError);
+    if(aParams.optimize){
+      hypParameters->SetNbSurfOptSteps(aParams.optsteps2d);
+      hypParameters->SetNbVolOptSteps(aParams.optsteps3d);
+    }
+    hypParameters->SetElemSizeWeight(aParams.elsizeweight);
+    hypParameters->SetWorstElemMeasure(aParams.opterrpow);
+    hypParameters->SetUseDelauney(aParams.delaunay);
+    hypParameters->SetCheckOverlapping(aParams.checkoverlap);
+    hypParameters->SetCheckChartBoundary(aParams.checkchartboundary);
+    hypParameters->SetMeshSizeFile(aParams.meshsizefilename);
+
+    _hypParameters = dynamic_cast< const NETGENPlugin_Hypothesis *> (hypParameters);
+  }
+  if(aParams.has_maxelementvolume_hyp){
+    _hypMaxElementVolume = new StdMeshers_MaxElementVolume(1, GetGen());
+    _maxElementVolume = aParams.maxElementVolume;
+  }
+  // TODO: Handle viscous layer
+}
+
+/**
+ * @brief Write a binary file containing information on the elements/nodes
+ *        created by the mesher
+ *
+ * @param nodeVec mapping between the mesh id and the netgen structure id
+ * @param ngLib Wrapper on netgen library
+ * @param new_element_file Name of the output file
+ * @param Netgen_NbOfNodes Number of nodes in the netgen structure
+ * @return true if there are some error
+ */
+bool NETGENPlugin_NETGEN_3D_SA::computeFillNewElementFile(
+    std::vector< const SMDS_MeshNode* > &nodeVec,
+    NETGENPlugin_NetgenLibWrapper &ngLib,
+    std::string new_element_file,
+    int &Netgen_NbOfNodes
+)
+{
+  Ng_Mesh* Netgen_mesh = ngLib.ngMesh();
+
+  int Netgen_NbOfNodesNew = Ng_GetNP(Netgen_mesh);
+  int Netgen_NbOfTetra    = Ng_GetNE(Netgen_mesh);
+
+  bool isOK = ( Netgen_NbOfTetra > 0 );
+  if ( isOK && !new_element_file.empty() )
+  {
+    std::ofstream df(new_element_file, ios::out|ios::binary);
+
+    double Netgen_point[3];
+    int    Netgen_tetrahedron[4];
+
+    // Writing nodevec (correspondence netgen numbering mesh numbering)
+    // Number of nodes
+    df.write((char*) &Netgen_NbOfNodes, sizeof(int));
+    df.write((char*) &Netgen_NbOfNodesNew, sizeof(int));
+    for (int nodeIndex = 1 ; nodeIndex <= Netgen_NbOfNodes; ++nodeIndex )
+    {
+      //Id of the point
+      int id = nodeVec.at(nodeIndex)->GetID();
+      df.write((char*) &id, sizeof(int));
+    }
+
+    // Writing info on new points
+    for (int nodeIndex = Netgen_NbOfNodes +1 ; nodeIndex <= Netgen_NbOfNodesNew; ++nodeIndex )
+    {
+      Ng_GetPoint(Netgen_mesh, nodeIndex, Netgen_point );
+      // Coordinates of the point
+      df.write((char *) &Netgen_point, sizeof(double)*3);
+    }
+
+    // create tetrahedrons
+    df.write((char*) &Netgen_NbOfTetra, sizeof(int));
+    for ( int elemIndex = 1; elemIndex <= Netgen_NbOfTetra; ++elemIndex )
+    {
+      Ng_GetVolumeElement(Netgen_mesh, elemIndex, Netgen_tetrahedron);
+      df.write((char*) &Netgen_tetrahedron, sizeof(int)*4);
+    }
+  }
+  return false;
+}
+
+/**
+ * @brief Compute mesh associated to shape
+ *
+ * @param aShape the shape
+ * @param aMesh the mesh
+ * @param aParams netgen_params structure
+ * @param new_element_file Name of the file containing new element
+ * @param output_mesh Name of the output mesh (if empty it will not be written)
+ * @return true if there are some error
+ */
+bool NETGENPlugin_NETGEN_3D_SA::Compute(
+        TopoDS_Shape &aShape,
+        SMESH_Mesh& aMesh,
+        netgen_params& aParams,
+        std::string new_element_file,
+        bool output_mesh)
+{
+  // vector of nodes in which node index == netgen ID
+  vector< const SMDS_MeshNode* > nodeVec;
+  NETGENPlugin_NetgenLibWrapper ngLib;
+  SMESH_MesherHelper helper(aMesh);
+  int startWith = netgen::MESHCONST_MESHVOLUME;
+  int endWith   = netgen::MESHCONST_OPTVOLUME;
+  int Netgen_NbOfNodes=0;
+
+  // Changing netgen log_file putting it next to new_element_file
+  fs::path netgen_log_file = fs::path(new_element_file).remove_filename() / fs::path("NETGEN.out");
+
+  ngLib.setOutputFile(netgen_log_file.string());
+
+  NETGENPlugin_NETGEN_3D::computeFillNgMesh(aMesh, aShape, nodeVec, ngLib, helper, Netgen_NbOfNodes);
+
+  netgen::OCCGeometry occgeo;
+  NETGENPlugin_NETGEN_3D::computePrepareParam(aMesh, ngLib, occgeo, helper, endWith);
+
+  NETGENPlugin_NETGEN_3D::computeRunMesher(occgeo, nodeVec, ngLib._ngMesh, ngLib, startWith, endWith);
+
+  computeFillNewElementFile(nodeVec, ngLib, new_element_file, Netgen_NbOfNodes);
+
+  if(output_mesh)
+    NETGENPlugin_NETGEN_3D::computeFillMesh(nodeVec, ngLib, helper, Netgen_NbOfNodes);
+
+  return false;
+}
+
+
+/**
+ * @brief Running the mesher on the given files
+ *
+ * @param input_mesh_file Mesh file (containing 2D elements)
+ * @param shape_file Shape file (BREP or STEP format)
+ * @param hypo_file Ascii file containing the netgen parameters
+ * @param element_orientation_file Binary file containing the orientation of surface elemnts
+ * @param new_element_file output file containing info the elements created by the mesher
+ * @param output_mesh_file output mesh file (if empty it will not be created)
+ * @return int
+ */
+int NETGENPlugin_NETGEN_3D_SA::run(const std::string input_mesh_file,
+          const std::string shape_file,
+          const std::string hypo_file,
+          const std::string element_orientation_file,
+          const std::string new_element_file,
+          const std::string output_mesh_file)
+{
+
+  _element_orientation_file = element_orientation_file;
+
+  std::unique_ptr<SMESH_Mesh> myMesh(_gen->CreateMesh(false));
+
+  SMESH_DriverMesh::importMesh(input_mesh_file, *myMesh);
+
+  // Importing shape
+  TopoDS_Shape myShape;
+  SMESH_DriverShape::importShape(shape_file, myShape);
+
+  // Importing hypothesis
+  netgen_params myParams;
+
+  importNetgenParams(hypo_file, myParams);
+  fillHyp(myParams);
+
+  MESSAGE("Meshing with netgen3d");
+  int ret = Compute(myShape, *myMesh, myParams,
+                      new_element_file,
+                      !output_mesh_file.empty());
+
+
+  if(ret){
+    std::cerr << "Meshing failed" << std::endl;
+    return ret;
+  }
+
+  if(!output_mesh_file.empty()){
+    std::string meshName = "MESH";
+    SMESH_DriverMesh::exportMesh(output_mesh_file, *myMesh, meshName);
+  }
+
+  return ret;
+}
+
+/**
+ * @brief Compute the list of already meshed Surface elements and info
+ *        on their orientation and if they are internal
+ *
+ * @param aMesh Global Mesh
+ * @param aShape Shape associated to the mesh
+ * @param proxyMesh pointer to mesh used fo find the elements
+ * @param internals information on internal sub shapes
+ * @param helper helper associated to the mesh
+ * @param listElements map of surface element associated with
+ *                     their orientation and internal status
+ * @return true if their was some error
+ */
+bool NETGENPlugin_NETGEN_3D_SA::getSurfaceElements(
+    SMESH_Mesh&         aMesh,
+    const TopoDS_Shape& aShape,
+    SMESH_ProxyMesh::Ptr proxyMesh,
+    NETGENPlugin_Internals &internals,
+    SMESH_MesherHelper &helper,
+    std::map<const SMDS_MeshElement*, tuple<bool, bool>, TIDCompare>& listElements
+    )
+{
+  // To remove compilation warnings
+  (void) aShape;
+  (void) proxyMesh;
+  (void) internals;
+  (void) helper;
+  SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
+
+  // Get list of elements + their orientation from element_orientation file
+  std::map<vtkIdType, bool> elemOrientation;
+  {
+    // Setting all element orientation to false if there no element orientation file
+    if(_element_orientation_file.empty()){
+      MESSAGE("No element orientation file");
+
+      SMDS_ElemIteratorPtr iteratorElem = meshDS->elementsIterator(SMDSAbs_Face);
+      while ( iteratorElem->more() ) // loop on elements on a geom face
+        {
+          // check mesh face
+          const SMDS_MeshElement* elem = iteratorElem->next();
+          elemOrientation[elem->GetID()] = false;
+        }
+    } else {
+      MESSAGE("Reading from elements from file: " << _element_orientation_file);
+      std::ifstream df(_element_orientation_file, ios::binary|ios::in);
+      int nbElement;
+      bool orient;
+
+      // Warning of the use of vtkIdType (I had issue when run_mesher was compiled with internal vtk) and salome not
+      // Sizeof was the same but how he othered the type was different
+      // Maybe using another type (uint64_t) instead would be better
+      vtkIdType id;
+      df.read((char*)&nbElement, sizeof(int));
+
+      for(int ielem=0;ielem<nbElement;++ielem){
+        df.read((char*) &id, sizeof(vtkIdType));
+        df.read((char*) &orient, sizeof(bool));
+        elemOrientation[id] = orient;
+      }
+    }
+  }
+
+  // Adding elements from Mesh
+  SMDS_ElemIteratorPtr iteratorElem = meshDS->elementsIterator(SMDSAbs_Face);
+  bool isRev;
+
+  bool isIn;
+
+  while ( iteratorElem->more() ) // loop on elements on a geom face
+  {
+    // check mesh face
+    const SMDS_MeshElement* elem = iteratorElem->next();
+    if ( !elem ){
+      return error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
+    }
+    if ( elem->NbCornerNodes() != 3 ){
+      return error( COMPERR_BAD_INPUT_MESH, "Not triangle element encounters");
+    }
+    // Keeping only element that are in the element orientation file
+    isIn = elemOrientation.count(elem->GetID())==1;
+    if(!isIn)
+      continue;
+    // Get orientation
+    // Netgen requires that all the triangle point outside
+    isRev = elemOrientation[elem->GetID()];
+    listElements[elem] = tuple(isRev, false);
+  }
+
+  return false;
+}

src/NETGENPlugin/NETGENPlugin_NETGEN_3D_SA.hxx

@@ -0,0 +1,81 @@
+// Copyright (C) 2007-2021  CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+
+//=============================================================================
+// File      : NETGENPlugin_NETGEN_3D_SA.hxx
+// Created   : lundi 19 Septembre 2022
+// Author    : Yoann AUDOUIN (EDF)
+// Project   : SALOME
+//=============================================================================
+//
+#ifndef _NETGENPlugin_NETGEN_3D_SA_HXX_
+#define _NETGENPlugin_NETGEN_3D_SA_HXX_
+
+#include "NETGENPlugin_NETGEN_3D.hxx"
+
+#include <vector>
+#include <map>
+
+class NETGENPlugin_NetgenLibWrapper;
+class netgen_params;
+class SMDS_MeshNode;
+
+using namespace std;
+
+class NETGENPLUGIN_EXPORT NETGENPlugin_NETGEN_3D_SA: public NETGENPlugin_NETGEN_3D
+{
+ public:
+  NETGENPlugin_NETGEN_3D_SA();
+  virtual ~NETGENPlugin_NETGEN_3D_SA();
+
+  void fillHyp(netgen_params aParams);
+  bool Compute(TopoDS_Shape &aShape, SMESH_Mesh& aMesh, netgen_params& aParams,
+                       std::string new_element_file, bool output_mesh);
+
+  int run(const std::string input_mesh_file,
+          const std::string shape_file,
+          const std::string hypo_file,
+          const std::string element_orientation_file,
+          const std::string new_element_file,
+          const std::string output_mesh_file);
+
+ protected:
+
+  bool computeFillNewElementFile(
+    std::vector< const SMDS_MeshNode* > &nodeVec,
+    NETGENPlugin_NetgenLibWrapper &ngLib,
+    std::string new_element_file,
+    int &Netgen_NbOfNodes);
+
+  bool getSurfaceElements(
+    SMESH_Mesh&         aMesh,
+    const TopoDS_Shape& aShape,
+    SMESH_ProxyMesh::Ptr proxyMesh,
+    NETGENPlugin_Internals &internals,
+    SMESH_MesherHelper &helper,
+    std::map<const SMDS_MeshElement*, tuple<bool, bool>, TIDCompare>& listElements
+    ) override;
+
+   std::string _element_orientation_file="";
+};
+
+#endif

src/NETGENPlugin/NETGENPlugin_Runner_main.cxx

@@ -0,0 +1,94 @@
+// Copyright (C) 2007-2022  CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+
+//  File   : NETGENplugin_Runnner_main.cxx
+//  Author : Yoann AUDOUIN, EDF
+//  Module : NETGEN
+//
+
+#include "NETGENPlugin_NETGEN_3D_SA.hxx"
+
+#include <stdio.h>
+#include <string.h>
+#include <iostream>
+#include <chrono>
+
+/**
+ * @brief Main function
+ *
+ * @param argc Number of arguments
+ * @param argv Arguments
+ *
+ * @return error code
+ */
+int main(int argc, char *argv[]){
+
+  if(argc!=8||(argc==2 && (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help")==0))){
+    std::cout << "Error in number of arguments "<< argc-1<<" given expected 7" <<std::endl;
+    std::cout << "Syntax:"<<std::endl;
+    std::cout << "run_mesher MESHER INPUT_MESH_FILE SHAPE_FILE HYPO_FILE" << std::endl;
+    std::cout << "           ELEM_ORIENT_FILE " << std::endl;
+    std::cout << "           NEW_ELEMENT_FILE OUTPUT_MESH_FILE" << std::endl;
+    std::cout << std::endl;
+    std::cout << " Set argument to NONE to ignore them " << std::endl;
+    std::cout << std::endl;
+    std::cout << "Args:" << std::endl;
+    std::cout << "  MESHER: mesher to use from (NETGEN3D, NETGEN2D)" << std::endl;
+    std::cout << "  INPUT_MESH_FILE: MED File containing lower-dimension-elements already meshed" << std::endl;
+    std::cout << "  SHAPE_FILE: STEP file containing the shape to mesh" << std::endl;
+    std::cout << "  HYPO_FILE: Ascii file containint the list of parameters" << std::endl;
+    std::cout << "  (optional) ELEM_ORIENT_FILE: binary file containing the list of element from INPUT_MESH_FILE associated to the shape and their orientation" << std::endl;
+    std::cout << "  (optional) NEW_ELEMENT_FILE: (out) contains elements and nodes added by the meshing" << std::endl;
+    std::cout << "  (optional) OUTPUT_MESH_FILE: (out) MED File containing the mesh after the run of the mesher" << std::endl;
+    return 0;
+  }
+  std::string mesher=argv[1];
+  std::string input_mesh_file=argv[2];
+  std::string shape_file=argv[3];
+  std::string hypo_file=argv[4];
+  std::string element_orientation_file=argv[5];
+  std::string new_element_file=argv[6];
+  std::string output_mesh_file=argv[7];
+
+  //std::string thing;
+  //std::cin >> thing;
+
+  if (output_mesh_file == "NONE")
+    output_mesh_file = "";
+  if (element_orientation_file == "NONE")
+    element_orientation_file = "";
+  if (new_element_file == "NONE")
+    new_element_file = "";
+
+  if (mesher=="NETGEN3D"){
+    NETGENPlugin_NETGEN_3D_SA myplugin;
+    myplugin.run(input_mesh_file,
+             shape_file,
+             hypo_file,
+             element_orientation_file,
+             new_element_file,
+             output_mesh_file);
+  } else {
+    std::cerr << "Unknown mesher:" << mesher << std::endl;
+  }
+  return 0;
+}

src/NETGENPlugin/NETGENPlugin_i.cxx

@@ -36,6 +36,7 @@
 #include "NETGENPlugin_NETGEN_2D_ONLY_i.hxx"
 #include "NETGENPlugin_NETGEN_2D_i.hxx"
 #include "NETGENPlugin_NETGEN_3D_i.hxx"
+#include "NETGENPlugin_NETGEN_3D_Remote_i.hxx"
 #include "NETGENPlugin_SimpleHypothesis_2D_i.hxx"
 #include "NETGENPlugin_SimpleHypothesis_3D_i.hxx"
 
@@ -63,6 +64,8 @@ extern "C"
     // Algorithms
     if (strcmp(aHypName, "NETGEN_3D") == 0)
       aCreator = new NETGENPlugin_Creator_i<NETGENPlugin_NETGEN_3D_i>;
+    else if (strcmp(aHypName, "NETGEN_3D_Remote") == 0)
+      aCreator = new NETGENPlugin_Creator_i<NETGENPlugin_NETGEN_3D_Remote_i>;
     else if (strcmp(aHypName, "NETGEN_2D") == 0)
       aCreator = new NETGENPlugin_Creator_i<NETGENPlugin_NETGEN_2D_i>;
     else if (strcmp(aHypName, "NETGEN_2D_ONLY") == 0)