Salome HOME
Merge remote branch 'origin/eap/23307'
[plugins/blsurfplugin.git] / src / BLSURFPlugin / BLSURFPlugin_BLSURF.cxx
index 0c7058af1d9c2ca2a5d9ba1f4bd01579702dffbd..ca54cf399db7228228ada1e08581c449c731623d 100644 (file)
@@ -1,9 +1,9 @@
-// Copyright (C) 2007-2013  CEA/DEN, EDF R&D
+// Copyright (C) 2007-2016  CEA/DEN, EDF R&D
 //
 // 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.
+// 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
@@ -31,7 +31,6 @@
 extern "C"{
 #include <meshgems/meshgems.h>
 #include <meshgems/cadsurf.h>
-#include <meshgems/precad.h>
 }
 
 #include <structmember.h>
@@ -49,6 +48,7 @@ extern "C"{
 #include <SMESH_MesherHelper.hxx>
 #include <StdMeshers_FaceSide.hxx>
 #include <StdMeshers_ViscousLayers2D.hxx>
+#include <SMESH_File.hxx>
 
 #include <utilities.h>
 
@@ -91,116 +91,120 @@ extern "C"{
 #include <gp_XY.hxx>
 #include <gp_XYZ.hxx>
 
-#ifndef WNT
+#ifndef WIN32
 #include <fenv.h>
 #endif
 
+using namespace std;
+
 /* ==================================
  * ===========  PYTHON ==============
  * ==================================*/
 
-typedef struct {
-  PyObject_HEAD
-  int softspace;
-  std::string *out;
-  } PyStdOut;
-
-static void
-PyStdOut_dealloc(PyStdOut *self)
+namespace
 {
-  PyObject_Del(self);
-}
+  typedef struct {
+    PyObject_HEAD
+    int softspace;
+    std::string *out;
+    } PyStdOut;
+
+  static void
+  PyStdOut_dealloc(PyStdOut *self)
+  {
+    PyObject_Del(self);
+  }
 
-static PyObject *
-PyStdOut_write(PyStdOut *self, PyObject *args)
-{
-  char *c;
-  int l;
-  if (!PyArg_ParseTuple(args, "t#:write",&c, &l))
-    return NULL;
+  static PyObject *
+  PyStdOut_write(PyStdOut *self, PyObject *args)
+  {
+    char *c;
+    int l;
+    if (!PyArg_ParseTuple(args, "t#:write",&c, &l))
+      return NULL;
 
-  //std::cerr << c ;
-  *(self->out)=*(self->out)+c;
+    *(self->out)=*(self->out)+c;
 
-  Py_INCREF(Py_None);
-  return Py_None;
-}
+    Py_INCREF(Py_None);
+    return Py_None;
+  }
 
-static PyMethodDef PyStdOut_methods[] = {
-  {"write",  (PyCFunction)PyStdOut_write,  METH_VARARGS,
-    PyDoc_STR("write(string) -> None")},
-  {NULL,    NULL}   /* sentinel */
-};
-
-static PyMemberDef PyStdOut_memberlist[] = {
-  {(char*)"softspace", T_INT,  offsetof(PyStdOut, softspace), 0,
-   (char*)"flag indicating that a space needs to be printed; used by print"},
-  {NULL} /* Sentinel */
-};
-
-static PyTypeObject PyStdOut_Type = {
-  /* The ob_type field must be initialized in the module init function
-   * to be portable to Windows without using C++. */
-  PyObject_HEAD_INIT(NULL)
-  0,                            /*ob_size*/
-  "PyOut",                      /*tp_name*/
-  sizeof(PyStdOut),             /*tp_basicsize*/
-  0,                            /*tp_itemsize*/
-  /* methods */
-  (destructor)PyStdOut_dealloc, /*tp_dealloc*/
-  0,                            /*tp_print*/
-  0,                            /*tp_getattr*/
-  0,                            /*tp_setattr*/
-  0,                            /*tp_compare*/
-  0,                            /*tp_repr*/
-  0,                            /*tp_as_number*/
-  0,                            /*tp_as_sequence*/
-  0,                            /*tp_as_mapping*/
-  0,                            /*tp_hash*/
-  0,                            /*tp_call*/
-  0,                            /*tp_str*/
-  PyObject_GenericGetAttr,      /*tp_getattro*/
-  /* softspace is writable:  we must supply tp_setattro */
-  PyObject_GenericSetAttr,      /* tp_setattro */
-  0,                            /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT,           /*tp_flags*/
-  0,                            /*tp_doc*/
-  0,                            /*tp_traverse*/
-  0,                            /*tp_clear*/
-  0,                            /*tp_richcompare*/
-  0,                            /*tp_weaklistoffset*/
-  0,                            /*tp_iter*/
-  0,                            /*tp_iternext*/
-  PyStdOut_methods,             /*tp_methods*/
-  PyStdOut_memberlist,          /*tp_members*/
-  0,                            /*tp_getset*/
-  0,                            /*tp_base*/
-  0,                            /*tp_dict*/
-  0,                            /*tp_descr_get*/
-  0,                            /*tp_descr_set*/
-  0,                            /*tp_dictoffset*/
-  0,                            /*tp_init*/
-  0,                            /*tp_alloc*/
-  0,                            /*tp_new*/
-  0,                            /*tp_free*/
-  0,                            /*tp_is_gc*/
-};
-
-PyObject * newPyStdOut( std::string& out )
-{
-  PyStdOut *self;
-  self = PyObject_New(PyStdOut, &PyStdOut_Type);
-  if (self == NULL)
-    return NULL;
-  self->softspace = 0;
-  self->out=&out;
-  return (PyObject*)self;
+  static PyMethodDef PyStdOut_methods[] = {
+    {"write",  (PyCFunction)PyStdOut_write,  METH_VARARGS,
+      PyDoc_STR("write(string) -> None")},
+    {NULL,    NULL}   /* sentinel */
+  };
+
+  static PyMemberDef PyStdOut_memberlist[] = {
+    {(char*)"softspace", T_INT,  offsetof(PyStdOut, softspace), 0,
+     (char*)"flag indicating that a space needs to be printed; used by print"},
+    {NULL} /* Sentinel */
+  };
+
+  static PyTypeObject PyStdOut_Type = {
+    /* The ob_type field must be initialized in the module init function
+     * to be portable to Windows without using C++. */
+    PyObject_HEAD_INIT(NULL)
+    0,                            /*ob_size*/
+    "PyOut",                      /*tp_name*/
+    sizeof(PyStdOut),             /*tp_basicsize*/
+    0,                            /*tp_itemsize*/
+    /* methods */
+    (destructor)PyStdOut_dealloc, /*tp_dealloc*/
+    0,                            /*tp_print*/
+    0,                            /*tp_getattr*/
+    0,                            /*tp_setattr*/
+    0,                            /*tp_compare*/
+    0,                            /*tp_repr*/
+    0,                            /*tp_as_number*/
+    0,                            /*tp_as_sequence*/
+    0,                            /*tp_as_mapping*/
+    0,                            /*tp_hash*/
+    0,                            /*tp_call*/
+    0,                            /*tp_str*/
+    PyObject_GenericGetAttr,      /*tp_getattro*/
+    /* softspace is writable:  we must supply tp_setattro */
+    PyObject_GenericSetAttr,      /* tp_setattro */
+    0,                            /*tp_as_buffer*/
+    Py_TPFLAGS_DEFAULT,           /*tp_flags*/
+    0,                            /*tp_doc*/
+    0,                            /*tp_traverse*/
+    0,                            /*tp_clear*/
+    0,                            /*tp_richcompare*/
+    0,                            /*tp_weaklistoffset*/
+    0,                            /*tp_iter*/
+    0,                            /*tp_iternext*/
+    PyStdOut_methods,             /*tp_methods*/
+    PyStdOut_memberlist,          /*tp_members*/
+    0,                            /*tp_getset*/
+    0,                            /*tp_base*/
+    0,                            /*tp_dict*/
+    0,                            /*tp_descr_get*/
+    0,                            /*tp_descr_set*/
+    0,                            /*tp_dictoffset*/
+    0,                            /*tp_init*/
+    0,                            /*tp_alloc*/
+    0,                            /*tp_new*/
+    0,                            /*tp_free*/
+    0,                            /*tp_is_gc*/
+  };
+
+  PyObject * newPyStdOut( std::string& out )
+  {
+    PyStdOut* self = PyObject_New(PyStdOut, &PyStdOut_Type);
+    if (self) {
+      self->softspace = 0;
+      self->out=&out;
+    }
+    return (PyObject*)self;
+  }
 }
 
 
 ////////////////////////END PYTHON///////////////////////////
 
 //////////////////MY MAPS////////////////////////////////////////
+namespace {
 TopTools_IndexedMapOfShape FacesWithSizeMap;
 std::map<int,string> FaceId2SizeMap;
 TopTools_IndexedMapOfShape EdgesWithSizeMap;
@@ -212,9 +216,11 @@ std::map<int,PyObject*> FaceId2PythonSmp;
 std::map<int,PyObject*> EdgeId2PythonSmp;
 std::map<int,PyObject*> VertexId2PythonSmp;
 
+typedef std::map<int, std::vector< BLSURFPlugin_Attractor* > > TId2ClsAttractorVec;
+TId2ClsAttractorVec FaceId2ClassAttractor;
+TId2ClsAttractorVec FaceIndex2ClassAttractor;
 std::map<int,std::vector<double> > FaceId2AttractorCoords;
-std::map<int,BLSURFPlugin_Attractor*> FaceId2ClassAttractor;
-std::map<int,BLSURFPlugin_Attractor*> FaceIndex2ClassAttractor;
+int theNbAttractors;
 
 TopTools_IndexedMapOfShape FacesWithEnforcedVertices;
 std::map< int, BLSURFPlugin_Hypothesis::TEnfVertexCoordsList > FaceId2EnforcedVertexCoords;
@@ -225,7 +231,7 @@ bool HasSizeMapOnFace=false;
 bool HasSizeMapOnEdge=false;
 bool HasSizeMapOnVertex=false;
 //bool HasAttractorOnFace=false;
-
+}
 //=============================================================================
 /*!
  *
@@ -238,7 +244,7 @@ BLSURFPlugin_BLSURF::BLSURFPlugin_BLSURF(int hypId, int studyId,
 {
   MESSAGE("BLSURFPlugin_BLSURF::BLSURFPlugin_BLSURF");
 
-  _name = "BLSURF";
+  _name = "MG-CADSurf";//"BLSURF";
   _shapeType = (1 << TopAbs_FACE); // 1 bit /shape type
   _compatibleHypothesis.push_back(BLSURFPlugin_Hypothesis::GetHypType());
   _compatibleHypothesis.push_back(StdMeshers_ViscousLayers2D::GetHypType());
@@ -255,7 +261,7 @@ BLSURFPlugin_BLSURF::BLSURFPlugin_BLSURF(int hypId, int studyId,
 
   myStudy = NULL;
   myStudy = aStudyMgr->GetStudyByID(_studyId);
-  if (myStudy)
+  if ( !myStudy->_is_nil() )
     MESSAGE("myStudy->StudyId() = " << myStudy->StudyId());
 
   /* Initialize the Python interpreter */
@@ -289,9 +295,7 @@ BLSURFPlugin_BLSURF::BLSURFPlugin_BLSURF(int hypId, int studyId,
   EnfVertexCoords2ProjVertex.clear();
   EnfVertexCoords2EnfVertexList.clear();
 
-#ifdef WITH_SMESH_CANCEL_COMPUTE
   _compute_canceled = false;
-#endif
 }
 
 //=============================================================================
@@ -331,7 +335,7 @@ bool BLSURFPlugin_BLSURF::CheckHypothesis
     return true;  // can work with no hypothesis
   }
 
-  for ( itl = hyps.begin(); itl != hyps.end(); ++itl )
+  for ( itl = hyps.begin(); itl != hyps.end() && ( aStatus == HYP_OK ); ++itl )
   {
     theHyp = *itl;
     string hypName = theHyp->GetName();
@@ -346,7 +350,11 @@ bool BLSURFPlugin_BLSURF::CheckHypothesis
     }
     else if ( hypName == StdMeshers_ViscousLayers2D::GetHypType() )
     {
-      _haveViscousLayers = true;
+      if ( !_haveViscousLayers )
+      {
+        if ( error( StdMeshers_ViscousLayers2D::CheckHypothesis( aMesh, aShape, aStatus )))
+          _haveViscousLayers = true;
+      }
     }
     else
     {
@@ -358,18 +366,18 @@ bool BLSURFPlugin_BLSURF::CheckHypothesis
 
 //=============================================================================
 /*!
- * Pass parameters to BLSURF
+ * Pass parameters to MG-CADSurf
  */
 //=============================================================================
 
-inline std::string to_string(double d)
+inline std::string val_to_string(double d)
 {
    std::ostringstream o;
    o << d;
    return o.str();
 }
 
-inline std::string to_string_rel(double d)
+inline std::string val_to_string_rel(double d)
 {
    std::ostringstream o;
    o << d;
@@ -377,14 +385,14 @@ inline std::string to_string_rel(double d)
    return o.str();
 }
 
-inline std::string to_string(int i)
+inline std::string val_to_string(int i)
 {
    std::ostringstream o;
    o << i;
    return o.str();
 }
 
-inline std::string to_string_rel(int i)
+inline std::string val_to_string_rel(int i)
 {
    std::ostringstream o;
    o << i;
@@ -393,12 +401,6 @@ inline std::string to_string_rel(int i)
 }
 
 double _smp_phy_size;
-// #if BLSURF_VERSION_LONG >= "3.1.1"
-// //   sizemap_t *geo_sizemap_e, *geo_sizemap_f;
-//   sizemap_t *iso_sizemap_p, *iso_sizemap_e, *iso_sizemap_f;
-// //   sizemap_t *clean_geo_sizemap_e, *clean_geo_sizemap_f;
-//   sizemap_t *clean_iso_sizemap_p, *clean_iso_sizemap_e, *clean_iso_sizemap_f;
-// #endif
 status_t size_on_surface(integer face_id, real *uv, real *size, void *user_data);
 status_t size_on_edge(integer edge_id, real t, real *size, void *user_data);
 status_t size_on_vertex(integer vertex_id, real *size, void *user_data);
@@ -577,7 +579,7 @@ void createAttractorOnFace(TopoDS_Shape GeomShape, std::string AttractorFunction
   double a, b;       // Attractor parameter
   double d = 0.;
   bool createNode=false; // To create a node on attractor projection
-  int pos1, pos2;
+  size_t pos1, pos2;
   const char *sep = ";";
   // atIt->second has the following pattern:
   // ATTRACTOR(xa;ya;za;a;b;True|False;d)
@@ -716,6 +718,23 @@ BLSURFPlugin_BLSURF::TListOfIDs _getSubShapeIDsInMainShape(TopoDS_Shape theMainS
   return face_ids;
 }
 
+BLSURFPlugin_BLSURF::TListOfIDs _getSubShapeIDsInMainShape(SMESH_Mesh*      theMesh,
+                                                           TopoDS_Shape     theSubShape,
+                                                           TopAbs_ShapeEnum theShapeType)
+{
+  BLSURFPlugin_BLSURF::TListOfIDs face_ids;
+
+  for (TopExp_Explorer face_iter(theSubShape,theShapeType);face_iter.More();face_iter.Next())
+  {
+    int face_id = theMesh->GetMeshDS()->ShapeToIndex(face_iter.Current());
+    if (face_id == 0)
+      throw SALOME_Exception ( SMESH_Comment("Sub_shape not found in main_shape"));
+    face_ids.push_back(face_id);
+  }
+
+  return face_ids;
+}
+
 void BLSURFPlugin_BLSURF::addCoordsFromVertices(const std::vector<std::string> &theVerticesEntries, std::vector<double> &theVerticesCoords)
 {
   for (std::vector<std::string>::const_iterator it = theVerticesEntries.begin(); it != theVerticesEntries.end(); it++)
@@ -748,7 +767,7 @@ void BLSURFPlugin_BLSURF::addCoordsFromVertex(BLSURFPlugin_Hypothesis::TEntry th
 /////////////////////////////////////////////////////////
 void BLSURFPlugin_BLSURF::createPreCadFacesPeriodicity(TopoDS_Shape theGeomShape, const BLSURFPlugin_Hypothesis::TPreCadPeriodicity &preCadPeriodicity)
 {
-  MESSAGE("BLSURFPlugin_BLSURF::createFacesPeriodicity");
+  MESSAGE("BLSURFPlugin_BLSURF::createPreCadFacesPeriodicity");
 
   TopoDS_Shape geomShape1 = entryToShape(preCadPeriodicity.shape1Entry);
   TopoDS_Shape geomShape2 = entryToShape(preCadPeriodicity.shape2Entry);
@@ -771,14 +790,14 @@ void BLSURFPlugin_BLSURF::createPreCadFacesPeriodicity(TopoDS_Shape theGeomShape
 
   _preCadFacesIDsPeriodicityVector.push_back(preCadFacesPeriodicityIDs);
   MESSAGE("_preCadFacesIDsPeriodicityVector.size() = " << _preCadFacesIDsPeriodicityVector.size());
-  MESSAGE("BLSURFPlugin_BLSURF::createFacesPeriodicity END");
+  MESSAGE("BLSURFPlugin_BLSURF::createPreCadFacesPeriodicity END");
 
 }
 
 /////////////////////////////////////////////////////////
 void BLSURFPlugin_BLSURF::createPreCadEdgesPeriodicity(TopoDS_Shape theGeomShape, const BLSURFPlugin_Hypothesis::TPreCadPeriodicity &preCadPeriodicity)
 {
-  MESSAGE("BLSURFPlugin_BLSURF::createEdgesPeriodicity");
+  MESSAGE("BLSURFPlugin_BLSURF::createPreCadEdgesPeriodicity");
 
   TopoDS_Shape geomShape1 = entryToShape(preCadPeriodicity.shape1Entry);
   TopoDS_Shape geomShape2 = entryToShape(preCadPeriodicity.shape2Entry);
@@ -795,164 +814,60 @@ void BLSURFPlugin_BLSURF::createPreCadEdgesPeriodicity(TopoDS_Shape theGeomShape
 
   _preCadEdgesIDsPeriodicityVector.push_back(preCadEdgesPeriodicityIDs);
   MESSAGE("_preCadEdgesIDsPeriodicityVector.size() = " << _preCadEdgesIDsPeriodicityVector.size());
-  MESSAGE("BLSURFPlugin_BLSURF::createEdgesPeriodicity END");
-
-}
-
-/////////////////////////////////////////////////////////
-void BLSURFPlugin_BLSURF::createFacesPeriodicity(TopoDS_Shape theGeomShape, BLSURFPlugin_Hypothesis::TEntry theFace1,  BLSURFPlugin_Hypothesis::TEntry theFace2)
-{
-  MESSAGE("BLSURFPlugin_BLSURF::createFacesPeriodicity");
-
-  TopoDS_Shape GeomShape1 = entryToShape(theFace1);
-  TopoDS_Shape GeomShape2 = entryToShape(theFace2);
-
-  TListOfIDs theFace1_ids = _getSubShapeIDsInMainShape(theGeomShape, GeomShape1, TopAbs_FACE);
-  TListOfIDs theFace2_ids = _getSubShapeIDsInMainShape(theGeomShape, GeomShape2, TopAbs_FACE);
-
-  // Only one face id, since only a face can be selected
-  int theFace1_id = theFace1_ids[0];
-  int theFace2_id = theFace2_ids[0];
-
-  std::pair<int, int> pairOfFacesID = std::make_pair(theFace1_id, theFace2_id);
-
-  _facesIDsPeriodicityVector.push_back(pairOfFacesID);
-  MESSAGE("_facesIDsPeriodicityVector.size() = " << _facesIDsPeriodicityVector.size());
-  MESSAGE("BLSURFPlugin_BLSURF::createFacesPeriodicity END");
+  MESSAGE("BLSURFPlugin_BLSURF::createPreCadEdgesPeriodicity END");
 
 }
 
 
 /////////////////////////////////////////////////////////
-void BLSURFPlugin_BLSURF::createEdgesPeriodicity(TopoDS_Shape theGeomShape, BLSURFPlugin_Hypothesis::TEntry theFace1, BLSURFPlugin_Hypothesis::TEntry theEdge1,
-    BLSURFPlugin_Hypothesis::TEntry theFace2, BLSURFPlugin_Hypothesis::TEntry theEdge2, int edge_orientation)
-{
-  MESSAGE("BLSURFPlugin_BLSURF::createEdgesPeriodicity");
-
-  TEdgePeriodicityIDs edgePeriodicityIDs;
-
-  if (theFace1 != "")
-    {
-      TopoDS_Shape GeomFace1 = entryToShape(theFace1);
-      TListOfIDs theFace1_ids = _getSubShapeIDsInMainShape(theGeomShape, GeomFace1, TopAbs_FACE);
-      // Only one face id, since only a face can be selected
-      edgePeriodicityIDs.theFace1ID = theFace1_ids[0];
-    }
-  else
-    edgePeriodicityIDs.theFace1ID = 0;
-  if (theFace2 != "")
-    {
-      TopoDS_Shape GeomFace2 = entryToShape(theFace2);
-      TListOfIDs theFace2_ids = _getSubShapeIDsInMainShape(theGeomShape, GeomFace2, TopAbs_FACE);
-      edgePeriodicityIDs.theFace2ID = theFace2_ids[0];
-    }
-  else
-    edgePeriodicityIDs.theFace2ID = 0;
-
-  TopoDS_Shape GeomEdge1 = entryToShape(theEdge1);
-  TopoDS_Shape GeomEdge2 = entryToShape(theEdge2);
-
-  TListOfIDs theEdge1_ids = _getSubShapeIDsInMainShape(theGeomShape, GeomEdge1, TopAbs_EDGE);
-  TListOfIDs theEdge2_ids = _getSubShapeIDsInMainShape(theGeomShape, GeomEdge2, TopAbs_EDGE);
 
-  if (edge_orientation == 0 and GeomEdge1.Closed())
-    {
-      // if edge is closed, we have to set its orientation
-      MESSAGE("GeomEdge1.Orientation() = " << GeomEdge1.Orientation());
-      MESSAGE("GeomEdge2.Orientation() = " << GeomEdge2.Orientation());
-      if(GeomEdge1.Orientation() == TopAbs_FORWARD)
-        edge_orientation = CAD_ORIENTATION_REVERSED;
-      else
-        edge_orientation = CAD_ORIENTATION_FORWARD;
-    }
-
-  // Only one edge id, since only a edge can be selected
-  edgePeriodicityIDs.theEdge1ID = theEdge1_ids[0];
-  edgePeriodicityIDs.theEdge2ID = theEdge2_ids[0];
-  edgePeriodicityIDs.edge_orientation = edge_orientation;
-
-  _edgesIDsPeriodicityVector.push_back(edgePeriodicityIDs);
-  MESSAGE("_edgesIDsPeriodicityVector.size() = " << _edgesIDsPeriodicityVector.size());
-  MESSAGE("BLSURFPlugin_BLSURF::createEdgesPeriodicity END");
-
-}
-
-
-/////////////////////////////////////////////////////////
-void BLSURFPlugin_BLSURF::createVerticesPeriodicity(TopoDS_Shape theGeomShape, BLSURFPlugin_Hypothesis::TEntry theEdge1, BLSURFPlugin_Hypothesis::TEntry theVertex1,
-    BLSURFPlugin_Hypothesis::TEntry theEdge2, BLSURFPlugin_Hypothesis::TEntry theVertex2)
-{
-  MESSAGE("BLSURFPlugin_BLSURF::createVerticesPeriodicity");
-
-  TopoDS_Shape GeomEdge1 = entryToShape(theEdge1);
-  TopoDS_Shape GeomVertex1 = entryToShape(theVertex1);
-  TopoDS_Shape GeomEdge2 = entryToShape(theEdge2);
-  TopoDS_Shape GeomVertex2 = entryToShape(theVertex2);
-
-  TListOfIDs theEdge1_ids = _getSubShapeIDsInMainShape(theGeomShape, GeomEdge1, TopAbs_EDGE);
-  TListOfIDs vertices1_ids = _getSubShapeIDsInMainShape(theGeomShape, GeomVertex1, TopAbs_VERTEX);
-  TListOfIDs theEdge2_ids = _getSubShapeIDsInMainShape(theGeomShape, GeomEdge2, TopAbs_EDGE);
-  TListOfIDs vertices2_ids = _getSubShapeIDsInMainShape(theGeomShape, GeomVertex2, TopAbs_VERTEX);
-
-  // Only one vertex id, since only a vertex can be selected
-  TVertexPeriodicityIDs vertexPeriodicityIDs;
-  vertexPeriodicityIDs.theEdge1ID = theEdge1_ids[0];
-  vertexPeriodicityIDs.theVertex1ID = vertices1_ids[0];
-  vertexPeriodicityIDs.theEdge2ID = theEdge2_ids[0];
-  vertexPeriodicityIDs.theVertex2ID = vertices2_ids[0];
-
-  _verticesIDsPeriodicityVector.push_back(vertexPeriodicityIDs);
-  MESSAGE("_verticesIDsPeriodicityVector.size() = " << _verticesIDsPeriodicityVector.size());
-  MESSAGE("BLSURFPlugin_BLSURF::createVerticesPeriodicity END");
-
-}
-
-/////////////////////////////////////////////////////////
-
-void BLSURFPlugin_BLSURF::SetParameters(
-// #if BLSURF_VERSION_LONG >= "3.1.1"
-//                                         cad_t *                          c,
-// #endif
-                                        const BLSURFPlugin_Hypothesis* hyp,
+void BLSURFPlugin_BLSURF::SetParameters(const BLSURFPlugin_Hypothesis* hyp,
                                         cadsurf_session_t *            css,
-                                        precad_session_t *             pcs,
-                                        const TopoDS_Shape&            theGeomShape,
-                                        bool *                  use_precad
-                                       )
+                                        const TopoDS_Shape&            theGeomShape
+                                        )
 {
   // rnc : Bug 1457
   // Clear map so that it is not stored in the algorithm with old enforced vertices in it
   EnfVertexCoords2EnfVertexList.clear();
-  
-   double diagonal               = SMESH_Mesh::GetShapeDiagonalSize( theGeomShape );
-   double bbSegmentation         = _gen->GetBoundaryBoxSegmentation();
-   int    _physicalMesh          = BLSURFPlugin_Hypothesis::GetDefaultPhysicalMesh();
-   int    _geometricMesh         = BLSURFPlugin_Hypothesis::GetDefaultGeometricMesh();
-   double _phySize               = BLSURFPlugin_Hypothesis::GetDefaultPhySize(diagonal, bbSegmentation);
-   bool   _phySizeRel            = BLSURFPlugin_Hypothesis::GetDefaultPhySizeRel();
-   double _minSize               = BLSURFPlugin_Hypothesis::GetDefaultMinSize(diagonal);
-   bool   _minSizeRel            = BLSURFPlugin_Hypothesis::GetDefaultMinSizeRel();
-   double _maxSize               = BLSURFPlugin_Hypothesis::GetDefaultMaxSize(diagonal);
-   bool   _maxSizeRel            = BLSURFPlugin_Hypothesis::GetDefaultMaxSizeRel();
-   double _gradation             = BLSURFPlugin_Hypothesis::GetDefaultGradation();
-   bool   _quadAllowed           = BLSURFPlugin_Hypothesis::GetDefaultQuadAllowed();
-   double _angleMesh             = BLSURFPlugin_Hypothesis::GetDefaultAngleMesh();
-   double _chordalError          = BLSURFPlugin_Hypothesis::GetDefaultChordalError(diagonal);
-   bool   _anisotropic           = BLSURFPlugin_Hypothesis::GetDefaultAnisotropic();
-   double _anisotropicRatio      = BLSURFPlugin_Hypothesis::GetDefaultAnisotropicRatio();
-   bool   _removeTinyEdges       = BLSURFPlugin_Hypothesis::GetDefaultRemoveTinyEdges();
-   double _tinyEdgeLength        = BLSURFPlugin_Hypothesis::GetDefaultTinyEdgeLength(diagonal);
-   bool   _badElementRemoval     = BLSURFPlugin_Hypothesis::GetDefaultBadElementRemoval();
-   double _badElementAspectRatio = BLSURFPlugin_Hypothesis::GetDefaultBadElementAspectRatio();
-   bool   _optimizeMesh          = BLSURFPlugin_Hypothesis::GetDefaultOptimizeMesh();
-   bool   _quadraticMesh         = BLSURFPlugin_Hypothesis::GetDefaultQuadraticMesh();
-   int    _verb                  = BLSURFPlugin_Hypothesis::GetDefaultVerbosity();
-   int    _topology              = BLSURFPlugin_Hypothesis::GetDefaultTopology();
+
+  double diagonal               = SMESH_Mesh::GetShapeDiagonalSize( theGeomShape );
+  double bbSegmentation         = _gen->GetBoundaryBoxSegmentation();
+  int    _physicalMesh          = BLSURFPlugin_Hypothesis::GetDefaultPhysicalMesh();
+  int    _geometricMesh         = BLSURFPlugin_Hypothesis::GetDefaultGeometricMesh();
+  double _phySize               = BLSURFPlugin_Hypothesis::GetDefaultPhySize(diagonal, bbSegmentation);
+  bool   _phySizeRel            = BLSURFPlugin_Hypothesis::GetDefaultPhySizeRel();
+  double _minSize               = BLSURFPlugin_Hypothesis::GetDefaultMinSize(diagonal);
+  bool   _minSizeRel            = BLSURFPlugin_Hypothesis::GetDefaultMinSizeRel();
+  double _maxSize               = BLSURFPlugin_Hypothesis::GetDefaultMaxSize(diagonal);
+  bool   _maxSizeRel            = BLSURFPlugin_Hypothesis::GetDefaultMaxSizeRel();
+  double _use_gradation         = BLSURFPlugin_Hypothesis::GetDefaultUseGradation();
+  double _gradation             = BLSURFPlugin_Hypothesis::GetDefaultGradation();
+  double _use_volume_gradation  = BLSURFPlugin_Hypothesis::GetDefaultUseVolumeGradation();
+  double _volume_gradation      = BLSURFPlugin_Hypothesis::GetDefaultVolumeGradation();
+  bool   _quadAllowed           = BLSURFPlugin_Hypothesis::GetDefaultQuadAllowed();
+  double _angleMesh             = BLSURFPlugin_Hypothesis::GetDefaultAngleMesh();
+  double _chordalError          = BLSURFPlugin_Hypothesis::GetDefaultChordalError(diagonal);
+  bool   _anisotropic           = BLSURFPlugin_Hypothesis::GetDefaultAnisotropic();
+  double _anisotropicRatio      = BLSURFPlugin_Hypothesis::GetDefaultAnisotropicRatio();
+  bool   _removeTinyEdges       = BLSURFPlugin_Hypothesis::GetDefaultRemoveTinyEdges();
+  double _tinyEdgeLength        = BLSURFPlugin_Hypothesis::GetDefaultTinyEdgeLength(diagonal);
+  bool   _optimiseTinyEdges     = BLSURFPlugin_Hypothesis::GetDefaultOptimiseTinyEdges();
+  double _tinyEdgeOptimisLength = BLSURFPlugin_Hypothesis::GetDefaultTinyEdgeOptimisationLength(diagonal);
+  bool   _correctSurfaceIntersec= BLSURFPlugin_Hypothesis::GetDefaultCorrectSurfaceIntersection();
+  double _corrSurfaceIntersCost = BLSURFPlugin_Hypothesis::GetDefaultCorrectSurfaceIntersectionMaxCost();
+  bool   _badElementRemoval     = BLSURFPlugin_Hypothesis::GetDefaultBadElementRemoval();
+  double _badElementAspectRatio = BLSURFPlugin_Hypothesis::GetDefaultBadElementAspectRatio();
+  bool   _optimizeMesh          = BLSURFPlugin_Hypothesis::GetDefaultOptimizeMesh();
+  bool   _quadraticMesh         = BLSURFPlugin_Hypothesis::GetDefaultQuadraticMesh();
+  int    _verb                  = BLSURFPlugin_Hypothesis::GetDefaultVerbosity();
+  //int    _topology              = BLSURFPlugin_Hypothesis::GetDefaultTopology();
 
   // PreCAD
-   int _precadMergeEdges         = BLSURFPlugin_Hypothesis::GetDefaultPreCADMergeEdges();
-   int _precadProcess3DTopology  = BLSURFPlugin_Hypothesis::GetDefaultPreCADProcess3DTopology();
-   int _precadDiscardInput       = BLSURFPlugin_Hypothesis::GetDefaultPreCADDiscardInput();
+  //int _precadMergeEdges         = BLSURFPlugin_Hypothesis::GetDefaultPreCADMergeEdges();
+  int _precadRemoveTinyUVEdges  = BLSURFPlugin_Hypothesis::GetDefaultPreCADRemoveTinyUVEdges();
+  //int _precadRemoveDuplicateCADFaces = BLSURFPlugin_Hypothesis::GetDefaultPreCADRemoveDuplicateCADFaces();
+  int _precadProcess3DTopology  = BLSURFPlugin_Hypothesis::GetDefaultPreCADProcess3DTopology();
+  //int _precadDiscardInput       = BLSURFPlugin_Hypothesis::GetDefaultPreCADDiscardInput();
 
 
   if (hyp) {
@@ -974,80 +889,84 @@ void BLSURFPlugin_BLSURF::SetParameters(
       // if max size is not explicitly specified, "relative" flag is ignored
       _maxSizeRel    = hyp->IsMaxSizeRel();
     }
-    if (hyp->GetGradation() > 0)
+    _use_gradation = hyp->GetUseGradation();
+    if (hyp->GetGradation() > 0 && _use_gradation)
       _gradation     = hyp->GetGradation();
-    _quadAllowed   = hyp->GetQuadAllowed();
-     if (hyp->GetAngleMesh() > 0)
-     _angleMesh     = hyp->GetAngleMesh();
-     if (hyp->GetChordalError() > 0)
-       _chordalError           = hyp->GetChordalError();
-     _anisotropic            = hyp->GetAnisotropic();
-     if (hyp->GetAnisotropicRatio() >= 0)
-       _anisotropicRatio       = hyp->GetAnisotropicRatio();
-     _removeTinyEdges        = hyp->GetRemoveTinyEdges();
-     if (hyp->GetTinyEdgeLength() > 0)
-       _tinyEdgeLength         = hyp->GetTinyEdgeLength();
-     _badElementRemoval      = hyp->GetBadElementRemoval();
-     if (hyp->GetBadElementAspectRatio() >= 0)
-       _badElementAspectRatio  = hyp->GetBadElementAspectRatio();
-     _optimizeMesh  = hyp->GetOptimizeMesh();
-     _quadraticMesh = hyp->GetQuadraticMesh();
+    _use_volume_gradation    = hyp->GetUseVolumeGradation();
+    if (hyp->GetVolumeGradation() > 0 && _use_volume_gradation )
+      _volume_gradation      = hyp->GetVolumeGradation();
+    _quadAllowed     = hyp->GetQuadAllowed();
+    if (hyp->GetAngleMesh() > 0)
+      _angleMesh     = hyp->GetAngleMesh();
+    if (hyp->GetChordalError() > 0)
+      _chordalError          = hyp->GetChordalError();
+    _anisotropic             = hyp->GetAnisotropic();
+    if (hyp->GetAnisotropicRatio() >= 0)
+      _anisotropicRatio      = hyp->GetAnisotropicRatio();
+    _removeTinyEdges         = hyp->GetRemoveTinyEdges();
+    if (hyp->GetTinyEdgeLength() > 0)
+      _tinyEdgeLength        = hyp->GetTinyEdgeLength();
+    _optimiseTinyEdges       = hyp->GetOptimiseTinyEdges();
+    if (hyp->GetTinyEdgeOptimisationLength() > 0)
+      _tinyEdgeOptimisLength = hyp->GetTinyEdgeOptimisationLength();
+    _correctSurfaceIntersec  = hyp->GetCorrectSurfaceIntersection();
+    if (hyp->GetCorrectSurfaceIntersectionMaxCost() > 0)
+      _corrSurfaceIntersCost = hyp->GetCorrectSurfaceIntersectionMaxCost();
+    _badElementRemoval       = hyp->GetBadElementRemoval();
+    if (hyp->GetBadElementAspectRatio() >= 0)
+      _badElementAspectRatio = hyp->GetBadElementAspectRatio();
+    _optimizeMesh  = hyp->GetOptimizeMesh();
+    _quadraticMesh = hyp->GetQuadraticMesh();
     _verb          = hyp->GetVerbosity();
-     _topology      = (int) hyp->GetTopology();
-     // PreCAD
-     _precadMergeEdges = hyp->GetPreCADMergeEdges();
-     _precadProcess3DTopology = hyp->GetPreCADProcess3DTopology();
-     _precadDiscardInput = hyp->GetPreCADDiscardInput();
-
-    const BLSURFPlugin_Hypothesis::TOptionValues & opts = hyp->GetOptionValues();
+    //_topology      = (int) hyp->GetTopology();
+    // PreCAD
+    //_precadMergeEdges        = hyp->GetPreCADMergeEdges();
+    _precadRemoveTinyUVEdges = hyp->GetPreCADRemoveTinyUVEdges();
+    //_precadRemoveDuplicateCADFaces = hyp->GetPreCADRemoveDuplicateCADFaces();
+    _precadProcess3DTopology = hyp->GetPreCADProcess3DTopology();
+    //_precadDiscardInput      = hyp->GetPreCADDiscardInput();
+
+    const BLSURFPlugin_Hypothesis::TOptionValues& opts = hyp->GetOptionValues();
     BLSURFPlugin_Hypothesis::TOptionValues::const_iterator opIt;
     for ( opIt = opts.begin(); opIt != opts.end(); ++opIt )
       if ( !opIt->second.empty() ) {
         MESSAGE("cadsurf_set_param(): " << opIt->first << " = " << opIt->second);
         set_param(css, opIt->first.c_str(), opIt->second.c_str());
       }
-      
-    const BLSURFPlugin_Hypothesis::TOptionValues & preCADopts = hyp->GetPreCADOptionValues();
+
+    const BLSURFPlugin_Hypothesis::TOptionValues& custom_opts = hyp->GetCustomOptionValues();
+    for ( opIt = custom_opts.begin(); opIt != custom_opts.end(); ++opIt )
+      if ( !opIt->second.empty() ) {
+        MESSAGE("cadsurf_set_param(): " << opIt->first << " = " << opIt->second);
+        set_param(css, opIt->first.c_str(), opIt->second.c_str());
+     }
+
+    const BLSURFPlugin_Hypothesis::TOptionValues& preCADopts = hyp->GetPreCADOptionValues();
     for ( opIt = preCADopts.begin(); opIt != preCADopts.end(); ++opIt )
       if ( !opIt->second.empty() ) {
-        *use_precad = true;
-        MESSAGE("precad_set_param(): " << opIt->first << " = " << opIt->second);
-        precad_set_param(pcs, opIt->first.c_str(), opIt->second.c_str());
+        MESSAGE("cadsurf_set_param(): " << opIt->first << " = " << opIt->second);
+        set_param(css, opIt->first.c_str(), opIt->second.c_str());
       }
   }
-//   else {
-//     //0020968: EDF1545 SMESH: Problem in the creation of a mesh group on geometry
-//     // GetDefaultPhySize() sometimes leads to computation failure
-//     // GDD 26/07/2012 From Distene documentation, global physical size default value = diag/100
-//     _phySize = BLSURFPlugin_Hypothesis::GetDefaultPhySize(diagonal);
-//     _minSize = BLSURFPlugin_Hypothesis::GetDefaultMinSize(diagonal);
-//     _maxSize = BLSURFPlugin_Hypothesis::GetDefaultMaxSize(diagonal);
-//     _chordalError = BLSURFPlugin_Hypothesis::GetDefaultChordalError(diagonal);
-//     _tinyEdgeLength = BLSURFPlugin_Hypothesis::GetDefaultTinyEdgeLength(diagonal);
-//     MESSAGE("BLSURFPlugin_BLSURF::SetParameters using defaults");
-//   }
 
-  // PreCAD
-  if (_topology == BLSURFPlugin_Hypothesis::PreCAD) {
-    *use_precad = true;
-    precad_set_param(pcs, "verbose",                to_string(_verb).c_str());
-    precad_set_param(pcs, "merge_edges",            _precadMergeEdges ? "1" : "0");
-    precad_set_param(pcs, "process_3d_topology",    _precadProcess3DTopology ? "1" : "0");
-    precad_set_param(pcs, "discard_input_topology", _precadDiscardInput ? "1" : "0");
-  }
-  // unlimit mesh size (issue 0022266)
-  set_param(css, "max_number_of_points_per_patch", "1000000");
+  // PreProcessor (formerly PreCAD) -- commented params are preCADoptions (since 0023307)
+  //set_param(css, "merge_edges",            _precadMergeEdges ? "yes" : "no");
+  set_param(css, "remove_tiny_uv_edges",   _precadRemoveTinyUVEdges ? "yes" : "no");
+  //set_param(css, "remove_duplicate_cad_faces", _precadRemoveDuplicateCADFaces ? "yes" : "no");
+  set_param(css, "process_3d_topology",    _precadProcess3DTopology ? "1" : "0");
+  //set_param(css, "discard_input_topology", _precadDiscardInput ? "1" : "0");
+  //set_param(css, "max_number_of_points_per_patch", "1000000");
   
    bool useGradation = false;
    switch (_physicalMesh)
    {
      case BLSURFPlugin_Hypothesis::PhysicalGlobalSize:
        set_param(css, "physical_size_mode", "global");
-       set_param(css, "global_physical_size", _phySizeRel ? to_string_rel(_phySize).c_str() : to_string(_phySize).c_str());
+       set_param(css, "global_physical_size", _phySizeRel ? val_to_string_rel(_phySize).c_str() : val_to_string(_phySize).c_str());
        break;
      case BLSURFPlugin_Hypothesis::PhysicalLocalSize:
        set_param(css, "physical_size_mode", "local");
-       set_param(css, "global_physical_size", _phySizeRel ? to_string_rel(_phySize).c_str() : to_string(_phySize).c_str());
+       set_param(css, "global_physical_size", _phySizeRel ? val_to_string_rel(_phySize).c_str() : val_to_string(_phySize).c_str());
        useGradation = true;
        break;
      default:
@@ -1058,14 +977,14 @@ void BLSURFPlugin_BLSURF::SetParameters(
    {
      case BLSURFPlugin_Hypothesis::GeometricalGlobalSize:
        set_param(css, "geometric_size_mode", "global");
-       set_param(css, "geometric_approximation", to_string(_angleMesh).c_str());
-       set_param(css, "chordal_error", to_string(_chordalError).c_str());
+       set_param(css, "geometric_approximation", val_to_string(_angleMesh).c_str());
+       set_param(css, "chordal_error", val_to_string(_chordalError).c_str());
        useGradation = true;
        break;
      case BLSURFPlugin_Hypothesis::GeometricalLocalSize:
        set_param(css, "geometric_size_mode", "local");
-       set_param(css, "geometric_approximation", to_string(_angleMesh).c_str());
-       set_param(css, "chordal_error", to_string(_chordalError).c_str());
+       set_param(css, "geometric_approximation", val_to_string(_angleMesh).c_str());
+       set_param(css, "chordal_error", val_to_string(_chordalError).c_str());
        useGradation = true;
        break;
      default:
@@ -1079,42 +998,52 @@ void BLSURFPlugin_BLSURF::SetParameters(
      double mins = _minSizeRel ? _minSize * diagonal : _minSize;
      // - min size should not be greater than user size
      if ( _phySize < mins )
-       set_param(css, "min_size", _phySizeRel ? to_string_rel(_phySize).c_str() : to_string(_phySize).c_str());
+       set_param(css, "min_size", _phySizeRel ? val_to_string_rel(_phySize).c_str() : val_to_string(_phySize).c_str());
      else
-       set_param(css, "min_size", _minSizeRel ? to_string_rel(_minSize).c_str() : to_string(_minSize).c_str());
+       set_param(css, "min_size", _minSizeRel ? val_to_string_rel(_minSize).c_str() : val_to_string(_minSize).c_str());
      // - compute absolute max size
      double maxs = _maxSizeRel ? _maxSize * diagonal : _maxSize;
      // - max size should not be less than user size
      if ( _phySize > maxs )
-       set_param(css, "max_size", _phySizeRel ? to_string_rel(_phySize).c_str() : to_string(_phySize).c_str());
+       set_param(css, "max_size", _phySizeRel ? val_to_string_rel(_phySize).c_str() : val_to_string(_phySize).c_str());
      else
-       set_param(css, "max_size", _maxSizeRel ? to_string_rel(_maxSize).c_str() : to_string(_maxSize).c_str());
+       set_param(css, "max_size", _maxSizeRel ? val_to_string_rel(_maxSize).c_str() : val_to_string(_maxSize).c_str());
    }
    else {
      // user size is not explicitly specified
      // - if minsize is not explicitly specified, we pass default value computed automatically, in this case "relative" flag is ignored
-     set_param(css, "min_size", _minSizeRel ? to_string_rel(_minSize).c_str() : to_string(_minSize).c_str());
+     set_param(css, "min_size", _minSizeRel ? val_to_string_rel(_minSize).c_str() : val_to_string(_minSize).c_str());
      // - if maxsize is not explicitly specified, we pass default value computed automatically, in this case "relative" flag is ignored
-     set_param(css, "max_size", _maxSizeRel ? to_string_rel(_maxSize).c_str() : to_string(_maxSize).c_str());
+     set_param(css, "max_size", _maxSizeRel ? val_to_string_rel(_maxSize).c_str() : val_to_string(_maxSize).c_str());
    }
-  
-  if ( useGradation )
-     set_param(css, "gradation",                         to_string(_gradation).c_str());
+   // anisotropic and quadrangle mesh requires disabling gradation
+   if ( _anisotropic && _quadAllowed )
+     useGradation = false; // limitation of V1.3
+   if ( useGradation && _use_gradation )
+     set_param(css, "gradation",                       val_to_string(_gradation).c_str());
+   if ( useGradation && _use_volume_gradation )
+     set_param(css, "volume_gradation",                val_to_string(_volume_gradation).c_str());
    set_param(css, "element_generation",                _quadAllowed ? "quad_dominant" : "triangle");
 
 
    set_param(css, "metric",                            _anisotropic ? "anisotropic" : "isotropic");
    if ( _anisotropic )
-     set_param(css, "anisotropic_ratio",                 to_string(_anisotropicRatio).c_str());
+     set_param(css, "anisotropic_ratio",                 val_to_string(_anisotropicRatio).c_str());
    set_param(css, "remove_tiny_edges",                 _removeTinyEdges ? "1" : "0");
    if ( _removeTinyEdges )
-     set_param(css, "tiny_edge_length",                  to_string(_tinyEdgeLength).c_str());
+     set_param(css, "tiny_edge_length",                  val_to_string(_tinyEdgeLength).c_str());
+   set_param(css, "optimise_tiny_edges",               _optimiseTinyEdges ? "1" : "0");
+   if ( _optimiseTinyEdges )
+     set_param(css, "tiny_edge_optimisation_length",   val_to_string(_tinyEdgeOptimisLength).c_str());
+   set_param(css, "correct_surface_intersections",     _correctSurfaceIntersec ? "1" : "0");
+   if ( _correctSurfaceIntersec )
+     set_param(css, "surface_intersections_processing_max_cost", val_to_string(_corrSurfaceIntersCost ).c_str());
    set_param(css, "force_bad_surface_element_removal", _badElementRemoval ? "1" : "0");
    if ( _badElementRemoval )
-     set_param(css, "bad_surface_element_aspect_ratio",  to_string(_badElementAspectRatio).c_str());
+     set_param(css, "bad_surface_element_aspect_ratio",  val_to_string(_badElementAspectRatio).c_str());
    set_param(css, "optimisation",                      _optimizeMesh ? "yes" : "no");
    set_param(css, "element_order",                     _quadraticMesh ? "quadratic" : "linear");
-   set_param(css, "verbose",                           to_string(_verb).c_str());
+   set_param(css, "verbose",                           val_to_string(_verb).c_str());
 
    _smp_phy_size = _phySizeRel ? _phySize*diagonal : _phySize;
    if ( _verb > 0 )
@@ -1138,7 +1067,7 @@ void BLSURFPlugin_BLSURF::SetParameters(
         MESSAGE("Geomtype is " << GeomType);
         int key = -1;
         // Group Management
-        if (GeomType == TopAbs_COMPOUND){
+        if (GeomType == TopAbs_COMPOUND) {
           for (TopoDS_Iterator it (GeomShape); it.More(); it.Next()){
             // Group of faces
             if (it.Value().ShapeType() == TopAbs_FACE){
@@ -1282,6 +1211,7 @@ void BLSURFPlugin_BLSURF::SetParameters(
     //  - build the map here for each face with an attractor set and only if the attractor shape as changed since the last call to _buildmap()
     //  -> define a bool _mapbuilt in the class that is set to false by default and set to true when calling _buildmap()  OK
 
+      theNbAttractors = 0;
     const BLSURFPlugin_Hypothesis::TAttractorMap class_attractors = BLSURFPlugin_Hypothesis::GetClassAttractorEntries(hyp);
     int key=-1;
     BLSURFPlugin_Hypothesis::TAttractorMap::const_iterator AtIt = class_attractors.begin();
@@ -1289,6 +1219,8 @@ void BLSURFPlugin_BLSURF::SetParameters(
       if ( !AtIt->second->Empty() ) {
        // MESSAGE("cadsurf_set_attractor(): " << AtIt->first << " = " << AtIt->second);
         GeomShape = entryToShape(AtIt->first);
+        if ( !SMESH_MesherHelper::IsSubShape( GeomShape, theGeomShape ))
+          continue;
         AttShape = AtIt->second->GetAttractorShape();
         GeomType  = GeomShape.ShapeType();
         // Group Management
@@ -1308,15 +1240,10 @@ void BLSURFPlugin_BLSURF::SetParameters(
            || AttShape.ShapeType() == TopAbs_COMPOUND) ){
             HasSizeMapOnFace = true;
 
-            if (! FacesWithSizeMap.Contains(TopoDS::Face(GeomShape)) ) {
-                key = FacesWithSizeMap.Add(TopoDS::Face(GeomShape) );
-            }
-            else {
-              key = FacesWithSizeMap.FindIndex(TopoDS::Face(GeomShape));
-//                 MESSAGE("Face with key " << key << " already in map");
-            }
+            key = FacesWithSizeMap.Add(TopoDS::Face(GeomShape) );
 
-            FaceId2ClassAttractor[key] = AtIt->second;
+            FaceId2ClassAttractor[key].push_back( AtIt->second );
+            ++theNbAttractors;
         }
         else{
           MESSAGE("Wrong shape type !!")
@@ -1386,36 +1313,15 @@ void BLSURFPlugin_BLSURF::SetParameters(
     }
 
     MESSAGE("Setting Size Map on FACES ");
-// #if BLSURF_VERSION_LONG < "3.1.1"
-    cadsurf_data_set_sizemap_iso_cad_face(css, size_on_surface, &_smp_phy_size);
-// #else
-//     if (*use_precad)
-//       iso_sizemap_f = sizemap_new(c, distene_sizemap_type_iso_cad_face, (void *)size_on_surface, NULL);
-//     else
-//       clean_iso_sizemap_f = sizemap_new(c, distene_sizemap_type_iso_cad_face, (void *)size_on_surface, NULL);
-// #endif
+    cadsurf_set_sizemap_iso_cad_face(css, size_on_surface, &_smp_phy_size);
 
     if (HasSizeMapOnEdge){
       MESSAGE("Setting Size Map on EDGES ");
-// #if BLSURF_VERSION_LONG < "3.1.1"
-      cadsurf_data_set_sizemap_iso_cad_edge(css, size_on_edge, &_smp_phy_size);
-// #else
-//       if (*use_precad)
-//         iso_sizemap_e = sizemap_new(c, distene_sizemap_type_iso_cad_edge, (void *)size_on_edge, NULL);
-//       else
-//         clean_iso_sizemap_e = sizemap_new(c, distene_sizemap_type_iso_cad_edge, (void *)size_on_edge, NULL);
-// #endif
+      cadsurf_set_sizemap_iso_cad_edge(css, size_on_edge, &_smp_phy_size);
     }
     if (HasSizeMapOnVertex){
       MESSAGE("Setting Size Map on VERTICES ");
-// #if BLSURF_VERSION_LONG < "3.1.1"
-      cadsurf_data_set_sizemap_iso_cad_point(css, size_on_vertex, &_smp_phy_size);
-// #else
-//       if (*use_precad)
-//         iso_sizemap_p = sizemap_new(c, distene_sizemap_type_iso_cad_point, (void *)size_on_vertex, NULL);
-//       else
-//         clean_iso_sizemap_p = sizemap_new(c, distene_sizemap_type_iso_cad_point, (void *)size_on_vertex, NULL);
-// #endif
+      cadsurf_set_sizemap_iso_cad_point(css, size_on_vertex, &_smp_phy_size);
     }
   }
 
@@ -1424,9 +1330,6 @@ void BLSURFPlugin_BLSURF::SetParameters(
    // reset vectors
    _preCadFacesIDsPeriodicityVector.clear();
    _preCadEdgesIDsPeriodicityVector.clear();
-   _facesIDsPeriodicityVector.clear();
-   _edgesIDsPeriodicityVector.clear();
-   _verticesIDsPeriodicityVector.clear();
 
   MESSAGE("SetParameters preCadFacesPeriodicityVector");
   const BLSURFPlugin_Hypothesis::TPreCadPeriodicityVector preCadFacesPeriodicityVector = BLSURFPlugin_Hypothesis::GetPreCadFacesPeriodicityVector(hyp);
@@ -1446,44 +1349,6 @@ void BLSURFPlugin_BLSURF::SetParameters(
   }
   MESSAGE("_preCadEdgesIDsPeriodicityVector.size() = " << _preCadEdgesIDsPeriodicityVector.size());
 
-  if ( _preCadFacesIDsPeriodicityVector.size() > 0 or _preCadEdgesIDsPeriodicityVector.size() > 0 )
-    {
-      MESSAGE("USING PRECAD FOR PERIODICITY")
-      *use_precad = true;
-      precad_set_param(pcs, "verbose",                to_string(_verb).c_str());
-    }
-
-  MESSAGE("SetParameters facesPeriodicityVector");
-  const BLSURFPlugin_Hypothesis::TFacesPeriodicityVector facesPeriodicityVector = BLSURFPlugin_Hypothesis::GetFacesPeriodicityVector(hyp);
-
-  for (std::size_t i = 0; i<facesPeriodicityVector.size(); i++){
-    MESSAGE("SetParameters facesPeriodicityVector[" << i << "]");
-    createFacesPeriodicity(theGeomShape, facesPeriodicityVector[i].first, facesPeriodicityVector[i].second);
-  }
-  MESSAGE("_facesIDsPeriodicityVector.size() = " << _facesIDsPeriodicityVector.size());
-
-
-  MESSAGE("SetParameters edgesPeriodicityVector");
-  const BLSURFPlugin_Hypothesis::TEdgesPeriodicityVector edgesPeriodicityVector = BLSURFPlugin_Hypothesis::GetEdgesPeriodicityVector(hyp);
-
-  for (std::size_t i = 0; i<edgesPeriodicityVector.size(); i++){
-    MESSAGE("SetParameters edgesPeriodicityVector[" << i << "]");
-    // TODO: passer directement en paramètre edgesPeriodicityVector[i] plutôt que tous ces attributs
-    createEdgesPeriodicity(theGeomShape, edgesPeriodicityVector[i].theFace1Entry, edgesPeriodicityVector[i].theEdge1Entry,
-        edgesPeriodicityVector[i].theFace2Entry, edgesPeriodicityVector[i].theEdge2Entry, edgesPeriodicityVector[i].edge_orientation);
-  }
-  MESSAGE("_edgesIDsPeriodicityVector.size() = " << _edgesIDsPeriodicityVector.size());
-
-  MESSAGE("SetParameters verticesPeriodicityVector");
-  const BLSURFPlugin_Hypothesis::TVerticesPeriodicityVector verticesPeriodicityVector = BLSURFPlugin_Hypothesis::GetVerticesPeriodicityVector(hyp);
-
-  for (std::size_t i = 0; i<verticesPeriodicityVector.size(); i++){
-    MESSAGE("SetParameters verticesPeriodicityVector[" << i << "]");
-    // TODO: passer directement en paramètre verticesPeriodicityVector[i] plutôt que tous ces attributs
-    createVerticesPeriodicity(theGeomShape, verticesPeriodicityVector[i].theEdge1Entry, verticesPeriodicityVector[i].theVertex1Entry,
-        verticesPeriodicityVector[i].theEdge2Entry, verticesPeriodicityVector[i].theVertex2Entry);
-  }
-  MESSAGE("_verticesIDsPeriodicityVector.size() = " << _verticesIDsPeriodicityVector.size());
 }
 
 //================================================================================
@@ -1517,7 +1382,7 @@ namespace
 {
   // --------------------------------------------------------------------------
   /*!
-   * \brief Class correctly terminating usage of BLSURF library at destruction
+   * \brief Class correctly terminating usage of MG-CADSurf library at destruction
    */
   class BLSURF_Cleaner
   {
@@ -1525,21 +1390,15 @@ namespace
     cadsurf_session_t* _css;
     cad_t *           _cad;
     dcad_t *          _dcad;
-    cad_t *           _cleanc;
-    dcad_t *          _cleandc;
   public:
     BLSURF_Cleaner(context_t *       ctx,
                    cadsurf_session_t* css,
                    cad_t *           cad,
-                   dcad_t *          dcad,
-                   cad_t *           cleanc,
-                   dcad_t *          cleandc)
+                   dcad_t *          dcad)
       : _ctx ( ctx  ),
         _css ( css  ),
         _cad ( cad  ),
-        _dcad( dcad ),
-        _cleanc( cleanc ),
-        _cleandc( cleandc )
+        _dcad( dcad )
     {
     }
     ~BLSURF_Cleaner()
@@ -1578,8 +1437,6 @@ namespace
 
         cad_delete(_cad); _cad = 0;
         dcad_delete(_dcad); _dcad = 0;
-        cad_delete(_cleanc); _cleanc = 0;
-        dcad_delete(_cleandc); _cleandc = 0;
         if ( !exceptContext )
         {
           context_delete(_ctx); _ctx = 0;
@@ -1617,7 +1474,7 @@ namespace
 
   //================================================================================
   /*!
-   * \brief Fills groups on nodes to be merged
+   * \brief Fills groups of nodes to be merged
    */
   //================================================================================
 
@@ -1647,7 +1504,11 @@ namespace
       }
       if ( u2node.size() < 2 ) return;
 
-      double tol = (( u2node.rbegin()->first - u2node.begin()->first ) / 20.) / u2node.size();
+      //double tol = (( u2node.rbegin()->first - u2node.begin()->first ) / 20.) / u2node.size();
+      Standard_Real f,l;
+      BRep_Tool::Range( TopoDS::Edge( shape ), f,l );
+      double tol = (( l - f ) / 20.) / u2node.size();
+
       std::multimap< double, const SMDS_MeshNode* >::iterator un2, un1;
       for ( un2 = u2node.begin(), un1 = un2++; un2 != u2node.end(); un1 = un2++ )
       {
@@ -1664,7 +1525,7 @@ namespace
             }
           }
           // make nodes created on the boundary of viscous layer replace nodes created
-          // by BLSURF as their SMDS_Position is more correct
+          // by MG-CADSurf as their SMDS_Position is more correct
           nodes.sort( ShapeTypeCompare() );
           nodeGroupsToMerge.push_back( nodes );
         }
@@ -1736,7 +1597,7 @@ namespace
 
         BRepBuilderAPI_MakePolygon wire;
         const size_t i0 = tmpVertex.size();
-        for ( size_t iN = 1; iN < wirePoints.size(); ++iN )
+        for ( size_t iN = 0; iN < wirePoints.size(); ++iN )
         {
           wire.Add( SMESH_TNodeXYZ( wirePoints[ iN ].node ));
           origNodes.push_back( wirePoints[ iN ].node );
@@ -1763,7 +1624,7 @@ namespace
       //_proxyFace = TopoDS::Face( fExp.Current() );
 
 
-      // Make input mesh for BLSURF: segments on EDGE's of newFace
+      // Make input mesh for MG-CADSurf: segments on EDGE's of newFace
 
       // make nodes and fill in _tmp2origNN
       //
@@ -1795,7 +1656,7 @@ namespace
 
     //--------------------------------------------------------------------------------
     /*!
-     * \brief Fill in the origMesh with faces computed by BLSURF in this tmp mesh
+     * \brief Fill in the origMesh with faces computed by MG-CADSurf in this tmp mesh
      */
     //--------------------------------------------------------------------------------
 
@@ -1822,7 +1683,7 @@ namespace
         for ( ; nIt->more(); ++nbN )
         {
           const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nIt->next() );
-          TN2NMap::iterator n2nIt = 
+          TN2NMap::iterator n2nIt =
             _tmp2origNN.insert( _tmp2origNN.end(), make_pair( n, nullNode ));
           if ( !n2nIt->second ) {
             n->GetXYZ( xyz );
@@ -1833,8 +1694,8 @@ namespace
         }
         switch( nbN ) {
         case 3: helper.AddFace( nodes[0], nodes[1], nodes[2] ); break;
-        // case 6: helper.AddFace( nodes[0], nodes[1], nodes[2],
-        //                         nodes[3], nodes[4], nodes[5]); break;
+          // case 6: helper.AddFace( nodes[0], nodes[1], nodes[2],
+          //                         nodes[3], nodes[4], nodes[5]); break;
         case 4: helper.AddFace( nodes[0], nodes[1], nodes[2], nodes[3] ); break;
         // case 9: helper.AddFace( nodes[0], nodes[1], nodes[2], nodes[3],
         //                         nodes[4], nodes[5], nodes[6], nodes[7], nodes[8]); break;
@@ -1855,7 +1716,6 @@ namespace
     double *      _progress;
   };
 
-
 } // namespace
 
 status_t curv_fun(real t, real *uv, real *dt, real *dtt, void *user_data);
@@ -1877,10 +1737,17 @@ bool BLSURFPlugin_BLSURF::Compute(SMESH_Mesh& aMesh, const TopoDS_Shape& aShape)
   // Fix problem with locales
   Kernel_Utils::Localizer aLocalizer;
 
-  if ( !compute( aMesh, aShape, /*allowSubMeshClearing=*/true ))
-    return false;
+  this->SMESH_Algo::_progress = 1e-3; // prevent progress advancment while computing attractors
+
+  bool viscousLayersMade =
+    ( aShape.ShapeType() == TopAbs_FACE &&
+      StdMeshers_ViscousLayers2D::HasProxyMesh( TopoDS::Face( aShape ), aMesh ));
 
-  if ( _haveViscousLayers )
+  if ( !viscousLayersMade )
+    if ( !compute( aMesh, aShape, /*allowSubMeshClearing=*/true ))
+      return false;
+
+  if ( _haveViscousLayers || viscousLayersMade )
   {
     // Compute viscous layers
 
@@ -1893,7 +1760,7 @@ bool BLSURFPlugin_BLSURF::Compute(SMESH_Mesh& aMesh, const TopoDS_Shape& aShape)
       if ( !viscousMesh )
         return false; // error in StdMeshers_ViscousLayers2D::Compute()
 
-      // Compute BLSURF mesh on viscous layers
+      // Compute MG-CADSurf mesh on viscous layers
 
       if ( viscousMesh->NbProxySubMeshes() > 0 )
       {
@@ -1905,7 +1772,7 @@ bool BLSURFPlugin_BLSURF::Compute(SMESH_Mesh& aMesh, const TopoDS_Shape& aShape)
       }
     }
 
-    // Re-compute BLSURF mesh on the rest faces if the mesh was cleared
+    // Re-compute MG-CADSurf mesh on the rest faces if the mesh was cleared
 
     for (TopExp_Explorer face_iter(aShape,TopAbs_FACE);face_iter.More();face_iter.Next())
     {
@@ -1934,6 +1801,7 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
   /* create a distene context (generic object) */
   status_t status = STATUS_ERROR;
 
+  myMesh = &aMesh;
   SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
   SMESH_MesherHelper helper( aMesh );
   // do not call helper.IsQuadraticSubMesh() because sub-meshes
@@ -1945,12 +1813,10 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
   TSubMeshSet edgeSubmeshes;
   TSubMeshSet& mergeSubmeshes = edgeSubmeshes;
 
-  TopTools_IndexedMapOfShape fmap;
-  TopTools_IndexedMapOfShape emap;
-  TopTools_IndexedMapOfShape pmap;
+  TopTools_IndexedMapOfShape pmap, emap, fmap;
 
   // Issue 0019864. On DebianSarge, FE signals do not obey to OSD::SetSignal(false)
-#ifndef WNT
+#ifndef WIN32
   feclearexcept( FE_ALL_EXCEPT );
   int oldFEFlags = fedisableexcept( FE_ALL_EXCEPT );
 #endif
@@ -1988,26 +1854,14 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
    */
 
   // PreCAD
-  // If user requests it, send the CAD through Distene preprocessor : PreCAD
-  cad_t *cleanc = NULL; // preprocessed cad
-  dcad_t *cleandc = NULL; // preprocessed dcad
-  precad_session_t *pcs = precad_session_new(ctx);
-  // Give both dcad and cad to precad
-  precad_data_set_dcad(pcs, dcad);
-  precad_data_set_cad(pcs, c);
 
   cadsurf_session_t *css = cadsurf_session_new(ctx);
 
   // an object that correctly deletes all cadsurf objects at destruction
-  BLSURF_Cleaner cleaner( ctx,css,c,dcad,cleanc,cleandc );
+  BLSURF_Cleaner cleaner( ctx,css,c,dcad );
 
   MESSAGE("BEGIN SetParameters");
-  bool use_precad = false;
-  SetParameters(
-                // #if BLSURF_VERSION_LONG >= "3.1.1"
-                //     c,
-                // #endif
-                _hypothesis, css, pcs, aShape, &use_precad);
+  SetParameters(_hypothesis, css, aShape);
   MESSAGE("END SetParameters");
 
   MESSAGE("_preCadFacesIDsPeriodicityVector.size() = " << _preCadFacesIDsPeriodicityVector.size());
@@ -2029,7 +1883,6 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
   vector<Handle(Geom2d_Curve)> curves;
   vector<Handle(Geom_Surface)> surfaces;
 
-  fmap.Clear();
   emap.Clear();
   pmap.Clear();
   FaceId2PythonSmp.clear();
@@ -2062,11 +1915,9 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
     if (f.Orientation() != TopAbs_FORWARD && f.Orientation() != TopAbs_REVERSED )
       f.Orientation(TopAbs_FORWARD);
 
-    if (fmap.FindIndex(f) > 0)
-      continue;
     iface = fmap.Add(f);
 //    std::string aFileName = "fmap_face_";
-//    aFileName.append(to_string(iface));
+//    aFileName.append(val_to_string(iface));
 //    aFileName.append(".brep");
 //    BRepTools::Write(f,aFileName.c_str());
 
@@ -2078,11 +1929,16 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
      * (For this face, it will be called by cadsurf with your_face_object_ptr
      * as last parameter.
      */
+#if OCC_VERSION_MAJOR < 7
     cad_face_t *fce = cad_face_new(c, iface, surf_fun, surfaces.back());
+#else
+    cad_face_t *fce = cad_face_new(c, iface, surf_fun, surfaces.back().get());
+#endif
 
     /* by default a face has no tag (color).
-       The following call sets it to the same value as the face_id : */
-    cad_face_set_tag(fce, iface);
+       The following call sets it to the same value as the Geom module ID : */
+    const int faceTag = meshDS->ShapeToIndex(f);
+    cad_face_set_tag(fce, faceTag);
 
     /* Set face orientation (optional if you want a well oriented output mesh)*/
     if(f.Orientation() != TopAbs_FORWARD)
@@ -2090,7 +1946,7 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
     else
       cad_face_set_orientation(fce, CAD_ORIENTATION_FORWARD);
 
-    if (HasSizeMapOnFace && !use_precad)
+    if (HasSizeMapOnFace /*&& !use_precad*/) //22903: use_precad seems not to interfere
     {
       // -----------------
       // Classic size map
@@ -2099,8 +1955,8 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
 
 
       if (FaceId2SizeMap.find(faceKey)!=FaceId2SizeMap.end()) {
-        MESSAGE("A size map is defined on face :"<<faceKey)
-          theSizeMapStr = FaceId2SizeMap[faceKey];
+        MESSAGE("A size map is defined on face :"<<faceKey);
+        theSizeMapStr = FaceId2SizeMap[faceKey];
         // check if function ends with "return"
         if (theSizeMapStr.find(bad_end) == (theSizeMapStr.size()-bad_end.size()-1))
           continue;
@@ -2160,11 +2016,17 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
       // -----------------
       // Class Attractors
       // -----------------
-      std::map<int,BLSURFPlugin_Attractor* >::iterator clAttractor_iter = FaceId2ClassAttractor.find(faceKey);
+      TId2ClsAttractorVec::iterator clAttractor_iter = FaceId2ClassAttractor.find(faceKey);
       if (clAttractor_iter != FaceId2ClassAttractor.end()){
         MESSAGE("Face indice: " << iface);
         MESSAGE("Adding attractor");
-        FaceIndex2ClassAttractor[iface]=clAttractor_iter->second;
+        std::vector< BLSURFPlugin_Attractor* > & attVec = clAttractor_iter->second;
+        for ( size_t i = 0; i < attVec.size(); ++i )
+          if ( !attVec[i]->IsMapBuilt() ) {
+            std::cout<<"Compute " << theNbAttractors-- << "-th attractor" <<std::endl;
+            attVec[i]->BuildMap();
+          }
+        FaceIndex2ClassAttractor[iface].swap( attVec );
         FaceId2ClassAttractor.erase(clAttractor_iter);
       }
     } // if (HasSizeMapOnFace && !use_precad)
@@ -2200,21 +2062,22 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
           MESSAGE("Point is out of face: node is not created");
           if (EnfVertexCoords2ProjVertex.find(xyzCoords) != EnfVertexCoords2ProjVertex.end()) {
             EnfVertexCoords2ProjVertex.erase(xyzCoords);
-            EnfVertexCoords2EnfVertexList.erase(xyzCoords);
+            // isssue 22783. Do not erase as this point can be IN other face of a group
+            //EnfVertexCoords2EnfVertexList.erase(xyzCoords);
           }
         }
         if ( result == TopAbs_UNKNOWN ) {
           MESSAGE("Point position on face is unknown: node is not created");
           if (EnfVertexCoords2ProjVertex.find(xyzCoords) != EnfVertexCoords2ProjVertex.end()) {
             EnfVertexCoords2ProjVertex.erase(xyzCoords);
-            EnfVertexCoords2EnfVertexList.erase(xyzCoords);
+            //EnfVertexCoords2EnfVertexList.erase(xyzCoords);
           }
         }
         if ( result == TopAbs_ON ) {
           MESSAGE("Point is on border of face: node is not created");
           if (EnfVertexCoords2ProjVertex.find(xyzCoords) != EnfVertexCoords2ProjVertex.end()) {
             EnfVertexCoords2ProjVertex.erase(xyzCoords);
-            EnfVertexCoords2EnfVertexList.erase(xyzCoords);
+            //EnfVertexCoords2EnfVertexList.erase(xyzCoords);
           }
         }
         if ( result == TopAbs_IN )
@@ -2263,7 +2126,7 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
         ic = emap.Add(e);
 
 //      std::string aFileName = "fmap_edge_";
-//      aFileName.append(to_string(ic));
+//      aFileName.append(val_to_string(ic));
 //      aFileName.append(".brep");
 //      BRepTools::Write(e,aFileName.c_str());
 
@@ -2325,7 +2188,11 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
       }
 
       /* attach the edge to the current cadsurf face */
+#if OCC_VERSION_MAJOR < 7
       cad_edge_t *edg = cad_edge_new(fce, ic, tmin, tmax, curv_fun, curves.back());
+#else
+      cad_edge_t *edg = cad_edge_new(fce, ic, tmin, tmax, curv_fun, curves.back().get());
+#endif
 
       /* by default an edge has no tag (color).
          The following call sets it to the same value as the edge_id : */
@@ -2340,7 +2207,7 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
       if (e.Orientation() == TopAbs_INTERNAL)
         cad_edge_set_property(edg, EDGE_PROPERTY_INTERNAL);
 
-      // pass existing nodes of sub-meshes to BLSURF
+      // pass existing nodes of sub-meshes to MG-CADSurf
       if ( nodeData )
       {
         const std::vector<UVPtStruct>& nodeDataVec = nodeData->GetUVPtStruct();
@@ -2397,7 +2264,7 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
         }
 
 //        std::string aFileName = "fmap_vertex_";
-//        aFileName.append(to_string(*ip));
+//        aFileName.append(val_to_string(*ip));
 //        aFileName.append(".brep");
 //        BRepTools::Write(v,aFileName.c_str());
 
@@ -2409,6 +2276,7 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
             if (theSizeMapStr.find(bad_end) == (theSizeMapStr.size()-bad_end.size()-1))
               continue;
             // Expr To Python function, verification is performed at validation in GUI
+            gstate = PyGILState_Ensure();
             PyObject * obj = NULL;
             obj= PyRun_String(theSizeMapStr.c_str(), Py_file_input, main_dict, NULL);
             Py_DECREF(obj);
@@ -2416,6 +2284,7 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
             func = PyObject_GetAttrString(main_mod, "f");
             VertexId2PythonSmp[*ip]=func;
             VertexId2SizeMap.erase(vertexKey);   // do not erase if using a vector
+            PyGILState_Release(gstate);
           }
         }
       }
@@ -2481,7 +2350,7 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
 
   MESSAGE("BEFORE PERIODICITY");
   MESSAGE("_preCadFacesIDsPeriodicityVector.size() = " << _preCadFacesIDsPeriodicityVector.size());
-  if (! _preCadFacesIDsPeriodicityVector.empty()){
+  if (! _preCadFacesIDsPeriodicityVector.empty()) {
     MESSAGE("INTO PRECAD FACES PERIODICITY");
     for (std::size_t i=0; i < _preCadFacesIDsPeriodicityVector.size(); i++){
       std::vector<int> theFace1_ids = _preCadFacesIDsPeriodicityVector[i].shape1IDs;
@@ -2531,7 +2400,7 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
   }
 
   MESSAGE("_preCadEdgesIDsPeriodicityVector.size() = " << _preCadEdgesIDsPeriodicityVector.size());
-  if (! _preCadEdgesIDsPeriodicityVector.empty()){
+  if (! _preCadEdgesIDsPeriodicityVector.empty()) {
     MESSAGE("INTO PRECAD EDGES PERIODICITY");
     for (std::size_t i=0; i < _preCadEdgesIDsPeriodicityVector.size(); i++){
       std::vector<int> theEdge1_ids = _preCadEdgesIDsPeriodicityVector[i].shape1IDs;
@@ -2585,139 +2454,16 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
     MESSAGE("END PRECAD EDGES PERIODICITY");
   }
 
-  if (! _facesIDsPeriodicityVector.empty()){
-    MESSAGE("INTO FACE PERIODICITY");
-    for (std::size_t i=0; i < _facesIDsPeriodicityVector.size(); i++){
-      int theFace1 = _facesIDsPeriodicityVector[i].first;
-      int theFace2 = _facesIDsPeriodicityVector[i].second;
-      MESSAGE("_facesIDsPeriodicityVector[" << i << "] = (" << theFace1 << ", " << theFace2 << ")");
-      status = cad_add_face_periodicity(c, theFace1, theFace2);
-      if(status != STATUS_OK){
-        cout << "cad_add_face_periodicity failed with error code " << status << "\n";
-      }
-    }
-    MESSAGE("END FACE PERIODICITY");
-  }
-
-
-  if (! _edgesIDsPeriodicityVector.empty()){
-    MESSAGE("INTO EDGE PERIODICITY");
-    for (std::size_t i=0; i < _edgesIDsPeriodicityVector.size(); i++){
-      int theFace1 = _edgesIDsPeriodicityVector[i].theFace1ID;
-      int theEdge1 = _edgesIDsPeriodicityVector[i].theEdge1ID;
-      int theFace2 = _edgesIDsPeriodicityVector[i].theFace2ID;
-      int theEdge2 = _edgesIDsPeriodicityVector[i].theEdge2ID;
-      int edge_orientation = _edgesIDsPeriodicityVector[i].edge_orientation;
-      MESSAGE("_edgesIDsPeriodicityVector[" << i << "] = (" << theFace1 << ", " << theEdge1 << ", " << theFace2 << ", " << theEdge2 << ", " << edge_orientation << ")");
-      status = cad_add_edge_periodicity(c, theFace1, theEdge1, theFace2, theEdge2, edge_orientation);
-      if(status != STATUS_OK){
-        cout << "cad_add_edge_periodicity failed with error code " << status << "\n";
-      }
-    }
-    MESSAGE("END EDGE PERIODICITY");
-  }
-
-  if (! _verticesIDsPeriodicityVector.empty()){
-    MESSAGE("INTO VERTEX PERIODICITY");
-    for (std::size_t i=0; i < _verticesIDsPeriodicityVector.size(); i++){
-      int theEdge1 = _verticesIDsPeriodicityVector[i].theEdge1ID;
-      int theVertex1 = _verticesIDsPeriodicityVector[i].theVertex1ID;
-      int theEdge2 = _verticesIDsPeriodicityVector[i].theEdge2ID;
-      int theVertex2 = _verticesIDsPeriodicityVector[i].theVertex2ID;
-      MESSAGE("_verticesIDsPeriodicityVector[" << i << "] = (" << theEdge1 << ", " << theVertex1 << ", " << theEdge2 << ", " << theVertex2 << ")");
-      status = cad_add_point_periodicity(c, theEdge1, theVertex1, theEdge2, theVertex2);
-      if(status != STATUS_OK){
-        cout << "cad_add_vertex_periodicity failed with error code " << status << "\n";
-      }
-    }
-    MESSAGE("END VERTEX PERIODICITY");
-  }
-
-    ////
-
-  if (use_precad) {
-    MESSAGE("use_precad");
-    /* Now launch the PreCAD process */
-    status = precad_process(pcs);
-    if(status != STATUS_OK){
-      // TODO: raise an error if status < 0.
-      cout << "================ WARNING =================== \n";
-      stringstream msg;
-      msg << "PreCAD processing failed with error code " << status << "\n";
-      msg << *mcud._error;
-      cout << msg.str();
-      cout << "============================================ \n";
-      // the text of _comment is set in message_cb by mcud->_error
-      // => No need to append msg to _comment
-      if (status > 0)
-        {
-          // TODO: fix the SIGSEGV of COMPERR_WARNING with 2 launches
-          error(COMPERR_WARNING, _comment);
-        }
-      if (status < 0)
-        {
-          error(_comment);
-        }
-    }
-    else {
-      // retrieve the pre-processed CAD object
-
-      // dcad
-      cleandc = precad_new_dcad(pcs);
-      if(!cleandc){
-        cout << "Unable to retrieve PreCAD result on dcad \n";
-      }
-      else
-        cout << "PreCAD processing successfull on dcad \n";
-
-      // cad
-      cleanc = precad_new_cad(pcs);
-      if(!cleanc){
-        cout << "Unable to retrieve PreCAD result on cad \n";
-      }
-      else
-        cout << "PreCAD processing successfull on cad \n";
-
-      // #if BLSURF_VERSION_LONG >= "3.1.1"
-      //       /* We can now get the updated sizemaps (if any) */
-      // //       if(geo_sizemap_e)
-      // //         clean_geo_sizemap_e = precad_new_sizemap(pcs, geo_sizemap_e);
-      // // 
-      // //       if(geo_sizemap_f)
-      // //         clean_geo_sizemap_f = precad_new_sizemap(pcs, geo_sizemap_f);
-      //
-      //       if(iso_sizemap_p)
-      //         clean_iso_sizemap_p = precad_new_sizemap(pcs, iso_sizemap_p);
-      //
-      //       if(iso_sizemap_e)
-      //         clean_iso_sizemap_e = precad_new_sizemap(pcs, iso_sizemap_e);
-      //
-      //       if(iso_sizemap_f)
-      //         clean_iso_sizemap_f = precad_new_sizemap(pcs, iso_sizemap_f);
-      // #endif
-    }
-    // Now we can delete the PreCAD session
-    precad_session_delete(pcs);
-  }
-
-  if (cleandc) {
-    cout << "Give the pre-processed dcad object to the current BLSurf session \n";
-    cadsurf_data_set_dcad(css, cleandc);
-  }
-  else {
-    // Use the original one
-    cadsurf_data_set_dcad(css, dcad);
-  }
+  
+  // TODO: be able to use a mesh in input.
+  // See imsh usage in Products/templates/mg-cadsurf_template_common.cpp
+  // => cadsurf_set_mesh
+    
+  // Use the original dcad
+  cadsurf_set_dcad(css, dcad);
 
-  if (cleanc) {
-    // Give the pre-processed CAD object to the current BLSurf session
-    cout << "Give the pre-processed CAD object to the current BLSurf session \n";
-    cadsurf_data_set_cad(css, cleanc);
-  }
-  else {
-    // Use the original one
-    cadsurf_data_set_cad(css, c);
-  }
+  // Use the original cad
+  cadsurf_set_cad(css, c);
 
   std::cout << std::endl;
   std::cout << "Beginning of Surface Mesh generation" << std::endl;
@@ -2743,20 +2489,16 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
     if ( _comment.empty() )
       _comment = "Exception in cadsurf_compute_mesh()";
   }
-  if ( status != STATUS_OK) {
-    // There was an error while meshing
-    error(_comment);
-  }
 
   std::cout << std::endl;
   std::cout << "End of Surface Mesh generation" << std::endl;
   std::cout << std::endl;
 
   mesh_t *msh = NULL;
-  cadsurf_data_get_mesh(css, &msh);
+  cadsurf_get_mesh(css, &msh);
   if(!msh){
     /* release the mesh object */
-    cadsurf_data_regain_mesh(css, msh);
+    cadsurf_regain_mesh(css, msh);
     return error(_comment);
   }
 
@@ -2764,8 +2506,7 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
   if (_hypothesis)
     GMFFileName = _hypothesis->GetGMFFile();
   if (GMFFileName != "") {
-    //     bool GMFFileMode = _hypothesis->GetGMFFileMode();
-    bool asciiFound = (GMFFileName.find(".mesh",GMFFileName.length()-5) != std::string::npos);
+    bool asciiFound  = (GMFFileName.find(".mesh", GMFFileName.length()-5) != std::string::npos);
     bool binaryFound = (GMFFileName.find(".meshb",GMFFileName.length()-6) != std::string::npos);
     if (!asciiFound && !binaryFound)
       GMFFileName.append(".mesh");
@@ -2887,8 +2628,13 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
     // the last of the two initial tags (else the output tag is out of emap and hasn't any meaning)
     mesh_get_composite_tag_definition(msh, tag, &nb_tag, tags_buff);
     if(nb_tag > 1)  
-      tag=tags_buff[nb_tag-1]; 
-
+      tag=tags_buff[nb_tag-1];
+    if ( tag < 1 || tag > emap.Extent() )
+    {
+      std::cerr << "MG-CADSurf BUG:::: Edge tag " << tag
+                << " does not point to a CAD edge (nb edges " << emap.Extent() << ")" << std::endl;
+      continue;
+    }
     if (tags[vtx[0]]) {
       Set_NodeOnEdge(meshDS, nodes[vtx[0]], emap(tag));
       tags[vtx[0]] = false;
@@ -2918,29 +2664,29 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
     mesh_get_triangle_extra_vertices(msh, it, &type, evtri);
     mesh_get_triangle_tag(msh, it, &tag);
     if (tags[vtx[0]]) {
-      meshDS->SetNodeOnFace(nodes[vtx[0]], TopoDS::Face(fmap(tag)));
+      meshDS->SetNodeOnFace(nodes[vtx[0]], tag);
       tags[vtx[0]] = false;
     };
     if (tags[vtx[1]]) {
-      meshDS->SetNodeOnFace(nodes[vtx[1]], TopoDS::Face(fmap(tag)));
+      meshDS->SetNodeOnFace(nodes[vtx[1]], tag);
       tags[vtx[1]] = false;
     };
     if (tags[vtx[2]]) {
-      meshDS->SetNodeOnFace(nodes[vtx[2]], TopoDS::Face(fmap(tag)));
+      meshDS->SetNodeOnFace(nodes[vtx[2]], tag);
       tags[vtx[2]] = false;
     };
     if (type == MESHGEMS_MESH_ELEMENT_TYPE_TRIA6) {
       // QUADRATIC TRIANGLE
       if (tags[evtri[0]]) {
-        meshDS->SetNodeOnFace(nodes[evtri[0]], TopoDS::Face(fmap(tag)));
+        meshDS->SetNodeOnFace(nodes[evtri[0]], tag);
         tags[evtri[0]] = false;
       }
       if (tags[evtri[1]]) {
-        meshDS->SetNodeOnFace(nodes[evtri[1]], TopoDS::Face(fmap(tag)));
+        meshDS->SetNodeOnFace(nodes[evtri[1]], tag);
         tags[evtri[1]] = false;
       }
       if (tags[evtri[2]]) {
-        meshDS->SetNodeOnFace(nodes[evtri[2]], TopoDS::Face(fmap(tag)));
+        meshDS->SetNodeOnFace(nodes[evtri[2]], tag);
         tags[evtri[2]] = false;
       }
       tri = meshDS->AddFace(nodes[vtx[0]], nodes[vtx[1]], nodes[vtx[2]],
@@ -2949,7 +2695,7 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
     else {
       tri = helper.AddFace(nodes[vtx[0]], nodes[vtx[1]], nodes[vtx[2]]);
     }
-    meshDS->SetMeshElementOnShape(tri, TopoDS::Face(fmap(tag)));
+    meshDS->SetMeshElementOnShape(tri, tag);
   }
 
   /* enumerate quadrangles */
@@ -2959,42 +2705,42 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
     mesh_get_quadrangle_extra_vertices(msh, it, &type, evquad);
     mesh_get_quadrangle_tag(msh, it, &tag);
     if (tags[vtx[0]]) {
-      meshDS->SetNodeOnFace(nodes[vtx[0]], TopoDS::Face(fmap(tag)));
+      meshDS->SetNodeOnFace(nodes[vtx[0]], tag);
       tags[vtx[0]] = false;
     };
     if (tags[vtx[1]]) {
-      meshDS->SetNodeOnFace(nodes[vtx[1]], TopoDS::Face(fmap(tag)));
+      meshDS->SetNodeOnFace(nodes[vtx[1]], tag);
       tags[vtx[1]] = false;
     };
     if (tags[vtx[2]]) {
-      meshDS->SetNodeOnFace(nodes[vtx[2]], TopoDS::Face(fmap(tag)));
+      meshDS->SetNodeOnFace(nodes[vtx[2]], tag);
       tags[vtx[2]] = false;
     };
     if (tags[vtx[3]]) {
-      meshDS->SetNodeOnFace(nodes[vtx[3]], TopoDS::Face(fmap(tag)));
+      meshDS->SetNodeOnFace(nodes[vtx[3]], tag);
       tags[vtx[3]] = false;
     };
     if (type == MESHGEMS_MESH_ELEMENT_TYPE_QUAD9) {
       // QUADRATIC QUADRANGLE
       std::cout << "This is a quadratic quadrangle" << std::endl;
       if (tags[evquad[0]]) {
-        meshDS->SetNodeOnFace(nodes[evquad[0]], TopoDS::Face(fmap(tag)));
+        meshDS->SetNodeOnFace(nodes[evquad[0]], tag);
         tags[evquad[0]] = false;
       }
       if (tags[evquad[1]]) {
-        meshDS->SetNodeOnFace(nodes[evquad[1]], TopoDS::Face(fmap(tag)));
+        meshDS->SetNodeOnFace(nodes[evquad[1]], tag);
         tags[evquad[1]] = false;
       }
       if (tags[evquad[2]]) {
-        meshDS->SetNodeOnFace(nodes[evquad[2]], TopoDS::Face(fmap(tag)));
+        meshDS->SetNodeOnFace(nodes[evquad[2]], tag);
         tags[evquad[2]] = false;
       }
       if (tags[evquad[3]]) {
-        meshDS->SetNodeOnFace(nodes[evquad[3]], TopoDS::Face(fmap(tag)));
+        meshDS->SetNodeOnFace(nodes[evquad[3]], tag);
         tags[evquad[3]] = false;
       }
       if (tags[evquad[4]]) {
-        meshDS->SetNodeOnFace(nodes[evquad[4]], TopoDS::Face(fmap(tag)));
+        meshDS->SetNodeOnFace(nodes[evquad[4]], tag);
         tags[evquad[4]] = false;
       }
       quad = meshDS->AddFace(nodes[vtx[0]], nodes[vtx[1]], nodes[vtx[2]], nodes[vtx[3]],
@@ -3004,24 +2750,21 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
     else {
       quad = helper.AddFace(nodes[vtx[0]], nodes[vtx[1]], nodes[vtx[2]], nodes[vtx[3]]);
     }
-    meshDS->SetMeshElementOnShape(quad, TopoDS::Face(fmap(tag)));
+    meshDS->SetMeshElementOnShape(quad, tag);
   }
 
   /* release the mesh object, the rest is released by cleaner */
-  cadsurf_data_regain_mesh(css, msh);
+  cadsurf_regain_mesh(css, msh);
 
-  if ( needMerge ) // sew mesh computed by BLSURF with pre-existing mesh
+  if ( needMerge ) // sew mesh computed by MG-CADSurf with pre-existing mesh
   {
     SMESH_MeshEditor editor( &aMesh );
     SMESH_MeshEditor::TListOfListOfNodes nodeGroupsToMerge;
     TIDSortedElemSet segementsOnEdge;
-    TIDSortedNodeSet nodesOnEdge;
     TSubMeshSet::iterator smIt;
     SMESHDS_SubMesh* smDS;
-    typedef SMDS_StdIterator< const SMDS_MeshNode*, SMDS_NodeIteratorPtr > TNodeIterator;
-    double tol;
 
-    // merge nodes on EDGE's with ones computed by BLSURF
+    // merge nodes on EDGE's with ones computed by MG-CADSurf
     for ( smIt = mergeSubmeshes.begin(); smIt != mergeSubmeshes.end(); ++smIt )
     {
       if (! (smDS = *smIt) ) continue;
@@ -3058,7 +2801,6 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
   }
 
   // SetIsAlwaysComputed( true ) to sub-meshes of EDGEs w/o mesh
-  TopLoc_Location loc; double f,l;
   for (int i = 1; i <= emap.Extent(); i++)
     if ( SMESH_subMesh* sm = aMesh.GetSubMeshContaining( emap( i )))
       sm->SetIsAlwaysComputed( true );
@@ -3068,16 +2810,33 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
         sm->SetIsAlwaysComputed( true );
 
   // Set error to FACE's w/o elements
-  for ( int i = 1; i <= fmap.Extent(); ++i )
+  SMESH_ComputeErrorName err = COMPERR_ALGO_FAILED;
+  if ( _comment.empty() && status == STATUS_OK )
   {
-    SMESH_subMesh* sm = aMesh.GetSubMesh( fmap(i) );
+    err      = COMPERR_WARNING;
+    _comment = "No mesh elements assigned to a face";
+  }
+  bool badFaceFound = false;
+  for (TopExp_Explorer face_iter(aShape,TopAbs_FACE);face_iter.More();face_iter.Next())
+  {
+    TopoDS_Face f = TopoDS::Face(face_iter.Current());
+    SMESH_subMesh* sm = aMesh.GetSubMesh( f );
     if ( !sm->GetSubMeshDS() || sm->GetSubMeshDS()->NbElements() == 0 )
-      sm->GetComputeError().reset
-        ( new SMESH_ComputeError( COMPERR_ALGO_FAILED, _comment, this ));
+    {
+      sm->GetComputeError().reset( new SMESH_ComputeError( err, _comment, this ));
+      badFaceFound = true;
+    }
+  }
+  if ( err == COMPERR_WARNING )
+  {
+    _comment.clear();
+  }
+  if ( status != STATUS_OK && !badFaceFound ) {
+    error(_comment);
   }
 
   // Issue 0019864. On DebianSarge, FE signals do not obey to OSD::SetSignal(false)
-#ifndef WNT
+#ifndef WIN32
   if ( oldFEFlags > 0 )
     feenableexcept( oldFEFlags );
   feclearexcept( FE_ALL_EXCEPT );
@@ -3104,12 +2863,10 @@ bool BLSURFPlugin_BLSURF::compute(SMESH_Mesh&         aMesh,
  */
 //================================================================================
 
-#ifdef WITH_SMESH_CANCEL_COMPUTE
 void BLSURFPlugin_BLSURF::CancelCompute()
 {
   _compute_canceled = true;
 }
-#endif
 
 //=============================================================================
 /*!
@@ -3126,6 +2883,12 @@ void BLSURFPlugin_BLSURF::Set_NodeOnEdge(SMESHDS_Mesh* meshDS, const SMDS_MeshNo
   Standard_Real p1 = 1.0;
   TopLoc_Location loc;
   Handle(Geom_Curve) curve = BRep_Tool::Curve(edge, loc, p0, p1);
+  if ( curve.IsNull() )
+  {
+    // issue 22499. Node at a sphere apex
+    meshDS->SetNodeOnEdge(node, edge, p0);
+    return;
+  }
 
   if ( !loc.IsIdentity() ) pnt.Transform( loc.Transformation().Inverted() );
   GeomAPI_ProjectPointOnCurve proj(pnt, curve, p0, p1);
@@ -3144,9 +2907,6 @@ void BLSURFPlugin_BLSURF::Set_NodeOnEdge(SMESHDS_Mesh* meshDS, const SMDS_MeshNo
       meshDS->MoveNode( node, curve_pnt.X(), curve_pnt.Y(), curve_pnt.Z() );
     }
   }
-//   GProp_GProps LProps;
-//   BRepGProp::LinearProperties(ed, LProps);
-//   double lg = (double)LProps.Mass();
 
   meshDS->SetNodeOnEdge(node, edge, pa);
 }
@@ -3161,14 +2921,14 @@ void BLSURFPlugin_BLSURF::Set_NodeOnEdge(SMESHDS_Mesh* meshDS, const SMDS_MeshNo
 status_t curv_fun(real t, real *uv, real *dt, real *dtt, void *user_data)
 {
   /* t is given. It contains the t (time) 1D parametric coordintaes
-     of the point PreCAD/BLSurf is querying on the curve */
+     of the point PreCAD/MG-CADSurf is querying on the curve */
 
-  /* user_data identifies the edge PreCAD/BLSurf is querying
+  /* user_data identifies the edge PreCAD/MG-CADSurf is querying
    * (see cad_edge_new later in this example) */
   const Geom2d_Curve*pargeo = (const Geom2d_Curve*) user_data;
 
   if (uv){
-   /* BLSurf is querying the function evaluation */
+   /* MG-CADSurf is querying the function evaluation */
     gp_Pnt2d P;
     P=pargeo->Value(t);
     uv[0]=P.X(); uv[1]=P.Y();
@@ -3202,9 +2962,9 @@ status_t surf_fun(real *uv, real *xyz, real*du, real *dv,
                   real *duu, real *duv, real *dvv, void *user_data)
 {
   /* uv[2] is given. It contains the u,v coordinates of the point
-   * PreCAD/BLSurf is querying on the surface */
+   * PreCAD/MG-CADSurf is querying on the surface */
 
-  /* user_data identifies the face PreCAD/BLSurf is querying (see
+  /* user_data identifies the face PreCAD/MG-CADSurf is querying (see
    * cad_face_new later in this example)*/
   const Geom_Surface* geometry = (const Geom_Surface*) user_data;
 
@@ -3241,15 +3001,12 @@ status_t surf_fun(real *uv, real *xyz, real*du, real *dv,
 
 status_t size_on_surface(integer face_id, real *uv, real *size, void *user_data)
 {
-  //MESSAGE("size_on_surface")
+  TId2ClsAttractorVec::iterator f2attVec;
   if (FaceId2PythonSmp.count(face_id) != 0){
-    //MESSAGE("A size map is used to calculate size on face : "<<face_id)
-    PyObject * pyresult = NULL;
-    PyObject* new_stderr = NULL;
     assert(Py_IsInitialized());
     PyGILState_STATE gstate;
     gstate = PyGILState_Ensure();
-    pyresult = PyObject_CallFunction(FaceId2PythonSmp[face_id],(char*)"(f,f)",uv[0],uv[1]);
+    PyObject* pyresult = PyObject_CallFunction(FaceId2PythonSmp[face_id],(char*)"(f,f)",uv[0],uv[1]);
     real result;
     if ( pyresult != NULL) {
       result = PyFloat_AsDouble(pyresult);
@@ -3259,10 +3016,12 @@ status_t size_on_surface(integer face_id, real *uv, real *size, void *user_data)
     else{
       fflush(stderr);
       string err_description="";
-      new_stderr = newPyStdOut(err_description);
+      PyObject* new_stderr = newPyStdOut(err_description);
+      PyObject* old_stderr = PySys_GetObject((char*)"stderr");
+      Py_INCREF(old_stderr);
       PySys_SetObject((char*)"stderr", new_stderr);
       PyErr_Print();
-      PySys_SetObject((char*)"stderr", PySys_GetObject((char*)"__stderr__"));
+      PySys_SetObject((char*)"stderr", old_stderr);
       Py_DECREF(new_stderr);
       MESSAGE("Can't evaluate f(" << uv[0] << "," << uv[1] << ")" << " error is " << err_description);
       result = *((real*)user_data);
@@ -3270,11 +3029,19 @@ status_t size_on_surface(integer face_id, real *uv, real *size, void *user_data)
     *size = result;
     PyGILState_Release(gstate);
   }
-  else if (FaceIndex2ClassAttractor.count(face_id) !=0 && !FaceIndex2ClassAttractor[face_id]->Empty()){
+  else if (( f2attVec = FaceIndex2ClassAttractor.find(face_id)) != FaceIndex2ClassAttractor.end() && !f2attVec->second.empty()){
 //    MESSAGE("attractor used on face :"<<face_id)
     // MESSAGE("List of attractor is not empty")
     // MESSAGE("Attractor empty : "<< FaceIndex2ClassAttractor[face_id]->Empty())
-    real result = FaceIndex2ClassAttractor[face_id]->GetSize(uv[0],uv[1]);
+    real result = 0;
+    result = 1e100;
+    std::vector< BLSURFPlugin_Attractor* > & attVec = f2attVec->second;
+    for ( size_t i = 0; i < attVec.size(); ++i )
+    {
+      //result += attVec[i]->GetSize(uv[0],uv[1]);
+      result = Min( result, attVec[i]->GetSize(uv[0],uv[1]));
+    }
+    //*size = result / attVec.size(); // mean of sizes defined by all attractors
     *size = result;
   }
   else {
@@ -3288,12 +3055,10 @@ status_t size_on_surface(integer face_id, real *uv, real *size, void *user_data)
 status_t size_on_edge(integer edge_id, real t, real *size, void *user_data)
 {
   if (EdgeId2PythonSmp.count(edge_id) != 0){
-    PyObject * pyresult = NULL;
-    PyObject* new_stderr = NULL;
     assert(Py_IsInitialized());
     PyGILState_STATE gstate;
     gstate = PyGILState_Ensure();
-    pyresult = PyObject_CallFunction(EdgeId2PythonSmp[edge_id],(char*)"(f)",t);
+    PyObject* pyresult = PyObject_CallFunction(EdgeId2PythonSmp[edge_id],(char*)"(f)",t);
     real result;
     if ( pyresult != NULL) {
       result = PyFloat_AsDouble(pyresult);
@@ -3303,10 +3068,12 @@ status_t size_on_edge(integer edge_id, real t, real *size, void *user_data)
     else{
       fflush(stderr);
       string err_description="";
-      new_stderr = newPyStdOut(err_description);
+      PyObject* new_stderr = newPyStdOut(err_description);
+      PyObject* old_stderr = PySys_GetObject((char*)"stderr");
+      Py_INCREF(old_stderr);
       PySys_SetObject((char*)"stderr", new_stderr);
       PyErr_Print();
-      PySys_SetObject((char*)"stderr", PySys_GetObject((char*)"__stderr__"));
+      PySys_SetObject((char*)"stderr", old_stderr);
       Py_DECREF(new_stderr);
       MESSAGE("Can't evaluate f(" << t << ")" << " error is " << err_description);
       result = *((real*)user_data);
@@ -3323,12 +3090,10 @@ status_t size_on_edge(integer edge_id, real t, real *size, void *user_data)
 status_t size_on_vertex(integer point_id, real *size, void *user_data)
 {
   if (VertexId2PythonSmp.count(point_id) != 0){
-    PyObject * pyresult = NULL;
-    PyObject* new_stderr = NULL;
     assert(Py_IsInitialized());
     PyGILState_STATE gstate;
     gstate = PyGILState_Ensure();
-    pyresult = PyObject_CallFunction(VertexId2PythonSmp[point_id],(char*)"");
+    PyObject* pyresult = PyObject_CallFunction(VertexId2PythonSmp[point_id],(char*)"");
     real result;
     if ( pyresult != NULL) {
       result = PyFloat_AsDouble(pyresult);
@@ -3338,10 +3103,12 @@ status_t size_on_vertex(integer point_id, real *size, void *user_data)
     else {
       fflush(stderr);
       string err_description="";
-      new_stderr = newPyStdOut(err_description);
+      PyObject* new_stderr = newPyStdOut(err_description);
+      PyObject* old_stderr = PySys_GetObject((char*)"stderr");
+      Py_INCREF(old_stderr);
       PySys_SetObject((char*)"stderr", new_stderr);
       PyErr_Print();
-      PySys_SetObject((char*)"stderr", PySys_GetObject((char*)"__stderr__"));
+      PySys_SetObject((char*)"stderr", old_stderr);
       Py_DECREF(new_stderr);
       MESSAGE("Can't evaluate f()" << " error is " << err_description);
       result = *((real*)user_data);
@@ -3356,7 +3123,7 @@ status_t size_on_vertex(integer point_id, real *size, void *user_data)
 }
 
 /*
- * The following function will be called for PreCAD/BLSurf message
+ * The following function will be called for PreCAD/MG-CADSurf message
  * printing.  See context_set_message_callback (later in this
  * template) for how to set user_data.
  */
@@ -3369,7 +3136,10 @@ status_t message_cb(message_t *msg, void *user_data)
   string err( desc );
   message_cb_user_data * mcud = (message_cb_user_data*)user_data;
   // Get all the error message and some warning messages related to license and periodicity
-  if ( errnumber < 0 || err.find("license") != string::npos || err.find("periodicity") != string::npos ) {
+  if ( errnumber < 0 ||
+       err.find("license"    ) != string::npos ||
+       err.find("periodicity") != string::npos )
+  {
     // remove ^A from the tail
     int len = strlen( desc );
     while (len > 0 && desc[len-1] != '\n')
@@ -3385,23 +3155,21 @@ status_t message_cb(message_t *msg, void *user_data)
   return STATUS_OK;
 }
 
-/* This is the interrupt callback. PreCAD/BLSurf will call this
+/* This is the interrupt callback. PreCAD/MG-CADSurf will call this
  * function regularily. See the file meshgems/interrupt.h
  */
 status_t interrupt_cb(integer *interrupt_status, void *user_data)
 {
   integer you_want_to_continue = 1;
-#ifdef WITH_SMESH_CANCEL_COMPUTE
   BLSURFPlugin_BLSURF* tmp = (BLSURFPlugin_BLSURF*)user_data;
   you_want_to_continue = !tmp->computeCanceled();
-#endif
 
   if(you_want_to_continue)
   {
     *interrupt_status = INTERRUPT_CONTINUE;
     return STATUS_OK;
   }
-  else /* you want to stop BLSurf */
+  else /* you want to stop MG-CADSurf */
   {
     *interrupt_status = INTERRUPT_STOP;
     return STATUS_ERROR;