X-Git-Url: http://git.salome-platform.org/gitweb/?a=blobdiff_plain;f=src%2FMEDCoupling%2FMEDCouplingAMRAttribute.cxx;h=4267ae29fb970c199bd7a431c1c8de90c6d717f1;hb=b7e277ad50223814bc479c5bd64cf12abe8fc959;hp=7060446acf8ce4852940451837fd716adbcbbcd3;hpb=aab3c03f8ed731235533bc24eb444837f6f8bd30;p=tools%2Fmedcoupling.git

diff --git a/src/MEDCoupling/MEDCouplingAMRAttribute.cxx b/src/MEDCoupling/MEDCouplingAMRAttribute.cxx
index 7060446ac..4267ae29f 100644
--- a/src/MEDCoupling/MEDCouplingAMRAttribute.cxx
+++ b/src/MEDCoupling/MEDCouplingAMRAttribute.cxx
@@ -1,4 +1,4 @@
-// Copyright (C) 2007-2014  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
@@ -24,26 +24,48 @@
 #include "MEDCouplingIMesh.hxx"
 
 #include <sstream>
+#include <fstream>
 
-using namespace ParaMEDMEM;
+using namespace MEDCoupling;
 
+/// @cond INTERNAL
 DataArrayDoubleCollection *DataArrayDoubleCollection::New(const std::vector< std::pair<std::string,int> >& fieldNames)
 {
   return new DataArrayDoubleCollection(fieldNames);
 }
 
+DataArrayDoubleCollection *DataArrayDoubleCollection::deepCopy() const
+{
+  return new DataArrayDoubleCollection(*this);
+}
+
 void DataArrayDoubleCollection::allocTuples(int nbOfTuples)
 {
   std::size_t sz(_arrs.size());
   for(std::size_t i=0;i<sz;i++)
-    _arrs[i]->reAlloc(nbOfTuples);
+    _arrs[i].first->reAlloc(nbOfTuples);
 }
 
 void DataArrayDoubleCollection::dellocTuples()
 {
   std::size_t sz(_arrs.size());
   for(std::size_t i=0;i<sz;i++)
-    _arrs[i]->reAlloc(0);
+    _arrs[i].first->reAlloc(0);
+}
+
+void DataArrayDoubleCollection::copyFrom(const DataArrayDoubleCollection& other)
+{
+  std::size_t sz(_arrs.size());
+  if(sz!=other._arrs.size())
+    throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::copyFrom : size are not the same !");
+  for(std::size_t i=0;i<sz;i++)
+    {
+      DataArrayDouble *thisArr(_arrs[i].first);
+      const DataArrayDouble *otherArr(other._arrs[i].first);
+      if(!thisArr || !otherArr)
+        throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::copyFrom : empty DataArray !");
+      thisArr->deepCopyFrom(*otherArr);
+    }
 }
 
 void DataArrayDoubleCollection::spillInfoOnComponents(const std::vector< std::vector<std::string> >& compNames)
@@ -54,8 +76,43 @@ void DataArrayDoubleCollection::spillInfoOnComponents(const std::vector< std::ve
   for(std::size_t i=0;i<sz;i++)
     {
       const std::vector<std::string>& names(compNames[i]);
-      _arrs[i]->setInfoOnComponents(names);
+      _arrs[i].first->setInfoOnComponents(names);
+    }
+}
+
+void DataArrayDoubleCollection::spillNatures(const std::vector<NatureOfField>& nfs)
+{
+  std::size_t sz(_arrs.size());
+  if(sz!=nfs.size())
+    throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::spillNatures : first size of vector of NatureOfField has to be equal to the number of fields defined !");
+  for(std::size_t i=0;i<sz;i++)
+    {
+      CheckValidNature(nfs[i]);
+      _arrs[i].second=nfs[i];
+    }
+}
+
+std::vector< std::pair < std::string, std::vector<std::string> > > DataArrayDoubleCollection::getInfoOnComponents() const
+{
+  std::size_t sz(_arrs.size());
+  std::vector< std::pair < std::string, std::vector<std::string> > > ret(sz);
+  for(std::size_t i=0;i<sz;i++)
+    {
+      const DataArrayDouble *elt(_arrs[i].first);
+      if(!elt)
+        throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::getInfoOnComponents : empty array !");
+      ret[i]=std::pair < std::string, std::vector<std::string> >(elt->getName(),elt->getInfoOnComponents());
     }
+  return ret;
+}
+
+std::vector<NatureOfField> DataArrayDoubleCollection::getNatures() const
+{
+  std::size_t sz(_arrs.size());
+  std::vector<NatureOfField> ret(sz);
+  for(std::size_t i=0;i<sz;i++)
+    ret[i]=_arrs[i].second;
+  return ret;
 }
 
 std::vector<DataArrayDouble *> DataArrayDoubleCollection::retrieveFields() const
@@ -64,7 +121,7 @@ std::vector<DataArrayDouble *> DataArrayDoubleCollection::retrieveFields() const
   std::vector<DataArrayDouble *> ret(sz);
   for(std::size_t i=0;i<sz;i++)
     {
-      const DataArrayDouble *tmp(_arrs[i]);
+      const DataArrayDouble *tmp(_arrs[i].first);
       ret[i]=const_cast<DataArrayDouble *>(tmp);
       if(ret[i])
         ret[i]->incrRef();
@@ -75,9 +132,9 @@ std::vector<DataArrayDouble *> DataArrayDoubleCollection::retrieveFields() const
 const DataArrayDouble *DataArrayDoubleCollection::getFieldWithName(const std::string& name) const
 {
   std::vector<std::string> vec;
-  for(std::vector< MEDCouplingAutoRefCountObjectPtr<DataArrayDouble> >::const_iterator it=_arrs.begin();it!=_arrs.end();it++)
+  for(std::vector< std::pair< MCAuto<DataArrayDouble>, NatureOfField > >::const_iterator it=_arrs.begin();it!=_arrs.end();it++)
     {
-      const DataArrayDouble *obj(*it);
+      const DataArrayDouble *obj((*it).first);
       if(obj)
         {
           if(obj->getName()==name)
@@ -91,6 +148,44 @@ const DataArrayDouble *DataArrayDoubleCollection::getFieldWithName(const std::st
   throw INTERP_KERNEL::Exception(oss.str().c_str());
 }
 
+DataArrayDouble *DataArrayDoubleCollection::getFieldWithName(const std::string& name)
+{
+  std::vector<std::string> vec;
+  for(std::vector< std::pair< MCAuto<DataArrayDouble>, NatureOfField > >::iterator it=_arrs.begin();it!=_arrs.end();it++)
+    {
+      DataArrayDouble *obj((*it).first);
+      if(obj)
+        {
+          if(obj->getName()==name)
+            return obj;
+          else
+            vec.push_back(obj->getName());
+        }
+    }
+  std::ostringstream oss; oss << "DataArrayDoubleCollection::getFieldWithName non const : fieldName \"" << name << "\" does not exist in this ! Possibilities are :";
+  std::copy(vec.begin(),vec.end(),std::ostream_iterator<std::string>(oss," "));
+  throw INTERP_KERNEL::Exception(oss.str().c_str());
+}
+
+DataArrayDouble *DataArrayDoubleCollection::at(int pos)
+{
+  if(pos<0 || pos>=(int)_arrs.size())
+    throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::at (non const) : pos must be in [0,nbOfFields) !");
+  return _arrs[pos].first;
+}
+
+const DataArrayDouble *DataArrayDoubleCollection::at(int pos) const
+{
+  if(pos<0 || pos>=(int)_arrs.size())
+    throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::at : pos must be in [0,nbOfFields) !");
+  return _arrs[pos].first;
+}
+
+int DataArrayDoubleCollection::size() const
+{
+  return (int)_arrs.size();
+}
+
 void DataArrayDoubleCollection::SynchronizeFineToCoarse(int ghostLev, const MEDCouplingCartesianAMRMeshGen *fatherOfFineMesh, int patchId, const DataArrayDoubleCollection *fine, DataArrayDoubleCollection *coarse)
 {
   if(!fine || !coarse)
@@ -99,7 +194,10 @@ void DataArrayDoubleCollection::SynchronizeFineToCoarse(int ghostLev, const MEDC
   if(fine->_arrs.size()!=sz)
     throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::SynchronizeFineToCoarse : the input DataArrayDouble collection must have the same size !");
   for(std::size_t i=0;i<sz;i++)
-    fatherOfFineMesh->fillCellFieldComingFromPatchGhost(patchId,fine->_arrs[i],coarse->_arrs[i],ghostLev);
+    {
+      CheckSameNatures(fine->_arrs[i].second,coarse->_arrs[i].second);
+      fatherOfFineMesh->fillCellFieldComingFromPatchGhost(patchId,fine->_arrs[i].first,coarse->_arrs[i].first,ghostLev,IsConservativeNature(coarse->_arrs[i].second));
+    }
 }
 
 void DataArrayDoubleCollection::SynchronizeCoarseToFine(int ghostLev, const MEDCouplingCartesianAMRMeshGen *fatherOfFineMesh, int patchId, const DataArrayDoubleCollection *coarse, DataArrayDoubleCollection *fine)
@@ -110,7 +208,10 @@ void DataArrayDoubleCollection::SynchronizeCoarseToFine(int ghostLev, const MEDC
   if(fine->_arrs.size()!=sz)
     throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::SynchronizeCoarseToFine : the input DataArrayDouble collection must have the same size !");
   for(std::size_t i=0;i<sz;i++)
-    fatherOfFineMesh->fillCellFieldOnPatchGhost(patchId,coarse->_arrs[i],fine->_arrs[i],ghostLev);
+    {
+      CheckSameNatures(fine->_arrs[i].second,coarse->_arrs[i].second);
+      fatherOfFineMesh->fillCellFieldOnPatchGhost(patchId,coarse->_arrs[i].first,fine->_arrs[i].first,ghostLev,IsConservativeNature(coarse->_arrs[i].second));
+    }
 }
 
 void DataArrayDoubleCollection::SynchronizeFineEachOther(int patchId, int ghostLev, const MEDCouplingCartesianAMRMeshGen *fatherOfFineMesh, const std::vector<const MEDCouplingCartesianAMRMeshGen *>& children, const std::vector<DataArrayDoubleCollection *>& fieldsOnFine)
@@ -133,7 +234,7 @@ void DataArrayDoubleCollection::SynchronizeFineEachOther(int patchId, int ghostL
     {
       std::vector<const DataArrayDouble *> arrs(sz);
       for(std::size_t j=0;j<sz;j++)
-        arrs[j]=fieldsOnFine[j]->_arrs[i];
+        arrs[j]=fieldsOnFine[j]->_arrs[i].first;
       fatherOfFineMesh->fillCellFieldOnPatchOnlyGhostAdv(patchId,ghostLev,arrs);
     }
 }
@@ -150,8 +251,10 @@ void DataArrayDoubleCollection::SynchronizeGhostZoneOfOneUsingTwo(int ghostLev,
     throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::SynchronizeGhostZoneOfOneUsingTwo : size of DataArrayDouble Collection must be the same !");
   for(std::size_t i=0;i<sz;i++)
     {
-      const DataArrayDouble *zeArrWhichGhostsWillBeUpdated(p1dac->_arrs[i]);
-      MEDCouplingCartesianAMRPatch::UpdateNeighborsOfOneWithTwoMixedLev(ghostLev,p1,p2,const_cast<DataArrayDouble *>(zeArrWhichGhostsWillBeUpdated),p2dac->_arrs[i]);
+      const DataArrayDouble *zeArrWhichGhostsWillBeUpdated(p1dac->_arrs[i].first);
+      DataArrayDoubleCollection::CheckSameNatures(p1dac->_arrs[i].second,p2dac->_arrs[i].second);
+      bool isConservative(DataArrayDoubleCollection::IsConservativeNature(p1dac->_arrs[i].second));
+      MEDCouplingCartesianAMRPatch::UpdateNeighborsOfOneWithTwoMixedLev(ghostLev,p1,p2,const_cast<DataArrayDouble *>(zeArrWhichGhostsWillBeUpdated),p2dac->_arrs[i].first,isConservative);
     }
 }
 
@@ -163,7 +266,7 @@ void DataArrayDoubleCollection::SynchronizeCoarseToFineOnlyInGhostZone(int ghost
   if(fine->_arrs.size()!=sz)
     throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::SynchronizeCoarseToFineOnlyInGhostZone : the input DataArrayDouble collection must have the same size !");
   for(std::size_t i=0;i<sz;i++)
-    fatherOfFineMesh->fillCellFieldOnPatchOnlyOnGhostZone(patchId,coarse->_arrs[i],fine->_arrs[i],ghostLev);
+    fatherOfFineMesh->fillCellFieldOnPatchOnlyOnGhostZone(patchId,coarse->_arrs[i].first,fine->_arrs[i].first,ghostLev);
 }
 
 void DataArrayDoubleCollection::synchronizeMyGhostZoneUsing(int ghostLev, const DataArrayDoubleCollection& other, const MEDCouplingCartesianAMRPatch *thisp, const MEDCouplingCartesianAMRPatch *otherp, const MEDCouplingCartesianAMRMeshGen *father) const
@@ -173,7 +276,7 @@ void DataArrayDoubleCollection::synchronizeMyGhostZoneUsing(int ghostLev, const
   if(other._arrs.size()!=sz)
     throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::synchronizeMyGhostZoneUsing : sizes of collections must match !");
   for(std::size_t i=0;i<sz;i++)
-    father->fillCellFieldOnPatchOnlyOnGhostZoneWith(ghostLev,thisp,otherp,thisNC->_arrs[i],other._arrs[i]);
+    father->fillCellFieldOnPatchOnlyOnGhostZoneWith(ghostLev,thisp,otherp,thisNC->_arrs[i].first,other._arrs[i].first);
 }
 
 void DataArrayDoubleCollection::synchronizeMyGhostZoneUsingExt(int ghostLev, const DataArrayDoubleCollection& other, const MEDCouplingCartesianAMRPatch *thisp, const MEDCouplingCartesianAMRPatch *otherp) const
@@ -183,7 +286,7 @@ void DataArrayDoubleCollection::synchronizeMyGhostZoneUsingExt(int ghostLev, con
   if(other._arrs.size()!=sz)
     throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::synchronizeMyGhostZoneUsingExt : sizes of collections must match !");
   for(std::size_t i=0;i<sz;i++)
-    MEDCouplingCartesianAMRPatch::UpdateNeighborsOfOneWithTwoExt(ghostLev,thisp,otherp,thisNC->_arrs[i],other._arrs[i]);
+    MEDCouplingCartesianAMRPatch::UpdateNeighborsOfOneWithTwoExt(ghostLev,thisp,otherp,thisNC->_arrs[i].first,other._arrs[i].first);
 }
 
 DataArrayDoubleCollection::DataArrayDoubleCollection(const std::vector< std::pair<std::string,int> >& fieldNames):_arrs(fieldNames.size())
@@ -193,38 +296,53 @@ DataArrayDoubleCollection::DataArrayDoubleCollection(const std::vector< std::pai
   for(std::size_t i=0;i<sz;i++)
     {
       const std::pair<std::string,int>& info(fieldNames[i]);
-      _arrs[i]=DataArrayDouble::New();
-      _arrs[i]->alloc(0,info.second);
-      _arrs[i]->setName(info.first);
+      if(info.second<=0)
+        {
+          std::ostringstream oss; oss << "DataArrayDoubleCollection constructor : At pos #" << i << " the array with name \"" << info.first << "\" as a number of components equal to " << info.second;
+          oss << " It has to be >=1 !";
+          throw INTERP_KERNEL::Exception(oss.str().c_str());
+        }
+      _arrs[i].first=DataArrayDouble::New();
+      _arrs[i].first->alloc(0,info.second);
+      _arrs[i].first->setName(info.first);
       names[i]=info.second;
+      _arrs[i].second=IntensiveMaximum;
     }
   CheckDiscriminantNames(names);
 }
 
+DataArrayDoubleCollection::DataArrayDoubleCollection(const DataArrayDoubleCollection& other):RefCountObject(other),_arrs(other._arrs.size())
+{
+  std::size_t sz(other._arrs.size());
+  for(std::size_t i=0;i<sz;i++)
+    {
+      _arrs[i].second=other._arrs[i].second;
+      const DataArrayDouble *da(other._arrs[i].first);
+      if(da)
+        _arrs[i].first=da->deepCopy();
+    }
+}
+
 std::size_t DataArrayDoubleCollection::getHeapMemorySizeWithoutChildren() const
 {
   std::size_t ret(sizeof(DataArrayDoubleCollection));
-  ret+=_arrs.capacity()*sizeof(MEDCouplingAutoRefCountObjectPtr<DataArrayDouble>);
+  ret+=_arrs.capacity()*sizeof(MCAuto<DataArrayDouble>);
   return ret;
 }
 
-std::vector<const BigMemoryObject *> DataArrayDoubleCollection::getDirectChildren() const
+std::vector<const BigMemoryObject *> DataArrayDoubleCollection::getDirectChildrenWithNull() const
 {
   std::vector<const BigMemoryObject *> ret;
-  for(std::vector< MEDCouplingAutoRefCountObjectPtr<DataArrayDouble> >::const_iterator it=_arrs.begin();it!=_arrs.end();it++)
-    {
-      const DataArrayDouble *pt(*it);
-      if(pt)
-        ret.push_back(pt);
-    }
+  for(std::vector< std::pair< MCAuto<DataArrayDouble>, NatureOfField > >::const_iterator it=_arrs.begin();it!=_arrs.end();it++)
+    ret.push_back((const DataArrayDouble *)(*it).first);
   return ret;
 }
 
 void DataArrayDoubleCollection::updateTime() const
 {
-  for(std::vector< MEDCouplingAutoRefCountObjectPtr<DataArrayDouble> >::const_iterator it=_arrs.begin();it!=_arrs.end();it++)
+  for(std::vector< std::pair< MCAuto<DataArrayDouble>, NatureOfField > >::const_iterator it=_arrs.begin();it!=_arrs.end();it++)
     {
-      const DataArrayDouble *pt(*it);
+      const DataArrayDouble *pt((*it).first);
       if(pt)
         updateTimeWith(*pt);
     }
@@ -237,14 +355,39 @@ void DataArrayDoubleCollection::CheckDiscriminantNames(const std::vector<std::st
     throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::CheckDiscriminantNames : The names of fields must be different each other ! It is not the case !");
 }
 
+bool DataArrayDoubleCollection::IsConservativeNature(NatureOfField n)
+{
+  CheckValidNature(n);
+  return n==IntensiveConservation || n==ExtensiveConservation;
+}
+
+void DataArrayDoubleCollection::CheckSameNatures(NatureOfField n1, NatureOfField n2)
+{
+  CheckValidNature(n1);
+  CheckValidNature(n2);
+  if(n1!=n2)
+    throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::CheckSameNatures : natures are not the same !");
+}
+
+void DataArrayDoubleCollection::CheckValidNature(NatureOfField n)
+{
+  if(n!=IntensiveMaximum && n!=ExtensiveMaximum && n!=ExtensiveConservation && n!=IntensiveConservation)
+    throw INTERP_KERNEL::Exception("DataArrayDoubleCollection::CheckValidNature : unrecognized nature !");
+}
+
 MEDCouplingGridCollection *MEDCouplingGridCollection::New(const std::vector<const MEDCouplingCartesianAMRMeshGen *>& ms, const std::vector< std::pair<std::string,int> >& fieldNames)
 {
   return new MEDCouplingGridCollection(ms,fieldNames);
 }
 
+MEDCouplingGridCollection *MEDCouplingGridCollection::deepCopy(const MEDCouplingCartesianAMRMeshGen *newGf, const MEDCouplingCartesianAMRMeshGen *oldGf) const
+{
+  return new MEDCouplingGridCollection(*this,newGf,oldGf);
+}
+
 void MEDCouplingGridCollection::alloc(int ghostLev)
 {
-  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
     {
       int nbTuples((*it).first->getNumberOfCellsAtCurrentLevelGhost(ghostLev));
       DataArrayDoubleCollection *dadc((*it).second);
@@ -257,7 +400,7 @@ void MEDCouplingGridCollection::alloc(int ghostLev)
 
 void MEDCouplingGridCollection::dealloc()
 {
-  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
     {
       DataArrayDoubleCollection *dadc((*it).second);
       if(dadc)
@@ -269,14 +412,40 @@ void MEDCouplingGridCollection::dealloc()
 
 void MEDCouplingGridCollection::spillInfoOnComponents(const std::vector< std::vector<std::string> >& compNames)
 {
-  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
     (*it).second->spillInfoOnComponents(compNames);
 }
 
+void MEDCouplingGridCollection::spillNatures(const std::vector<NatureOfField>& nfs)
+{
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
+    (*it).second->spillNatures(nfs);
+}
+
+std::vector< std::pair<std::string, std::vector<std::string> > > MEDCouplingGridCollection::getInfoOnComponents() const
+{
+  if(_map_of_dadc.empty())
+    throw INTERP_KERNEL::Exception("MEDCouplingGridCollection::getInfoOnComponents : empty map !");
+  const DataArrayDoubleCollection *elt(_map_of_dadc[0].second);
+  if(!elt)
+    throw INTERP_KERNEL::Exception("MEDCouplingGridCollection::getInfoOnComponents : null pointer !");
+  return elt->getInfoOnComponents();
+}
+
+std::vector<NatureOfField> MEDCouplingGridCollection::getNatures() const
+{
+  if(_map_of_dadc.empty())
+    throw INTERP_KERNEL::Exception("MEDCouplingGridCollection::getNatures : empty map !");
+  const DataArrayDoubleCollection *elt(_map_of_dadc[0].second);
+  if(!elt)
+    throw INTERP_KERNEL::Exception("MEDCouplingGridCollection::getNatures : null pointer !");
+  return elt->getNatures();
+}
+
 bool MEDCouplingGridCollection::presenceOf(const MEDCouplingCartesianAMRMeshGen *m, int& pos) const
 {
   int ret(0);
-  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::const_iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++,ret++)
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::const_iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++,ret++)
     {
       if((*it).first==m)
         {
@@ -294,18 +463,64 @@ const DataArrayDoubleCollection& MEDCouplingGridCollection::getFieldsAt(int pos)
   return *_map_of_dadc[pos].second;
 }
 
+DataArrayDoubleCollection& MEDCouplingGridCollection::getFieldsAt(int pos)
+{
+  if(pos<0 || pos>(int)_map_of_dadc.size())
+    throw INTERP_KERNEL::Exception("MEDCouplingGridCollection::getFieldsAt (non const) : invalid pos given in input ! Must be in [0,size) !");
+  return *_map_of_dadc[pos].second;
+}
+
+/*!
+ * This method copies for all grids intersecting themselves (between \a this and \a other), the values of fields of \a other to the intersecting
+ * part of fields of \a this. The fields are expected to be the same between \a other and \a this.
+ * This methods makes the hypothesis that \a this and \a other share two god father that are compatible each other that is to say with the same cell grid structure.
+ */
+void MEDCouplingGridCollection::copyOverlappedZoneFrom(int ghostLev, const MEDCouplingGridCollection& other)
+{
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
+    {
+      std::vector<int> deltaThis,deltaOther;
+      std::vector< std::pair<int,int> > rgThis((*it).first->positionRelativeToGodFather(deltaThis));
+      std::vector<int> thisSt((*it).first->getImageMesh()->getCellGridStructure());
+      std::transform(thisSt.begin(),thisSt.end(),thisSt.begin(),std::bind2nd(std::plus<int>(),2*ghostLev));
+      for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::const_iterator it2=other._map_of_dadc.begin();it2!=other._map_of_dadc.end();it2++)
+        {
+          std::vector< std::pair<int,int> > rgOther((*it2).first->positionRelativeToGodFather(deltaOther));
+          if(MEDCouplingStructuredMesh::AreRangesIntersect(rgThis,rgOther))
+            {
+              std::vector< std::pair<int,int> > isect(MEDCouplingStructuredMesh::IntersectRanges(rgThis,rgOther));
+              std::vector< std::pair<int,int> > pThis,pOther;
+              MEDCouplingStructuredMesh::ChangeReferenceFromGlobalOfCompactFrmt(rgThis,isect,pThis,true);
+              MEDCouplingStructuredMesh::ChangeReferenceFromGlobalOfCompactFrmt(rgOther,isect,pOther,true);
+              std::vector<int> otherSt((*it2).first->getImageMesh()->getCellGridStructure());
+              MEDCouplingStructuredMesh::ApplyGhostOnCompactFrmt(pThis,ghostLev);
+              MEDCouplingStructuredMesh::ApplyGhostOnCompactFrmt(pOther,ghostLev);
+              std::transform(otherSt.begin(),otherSt.end(),otherSt.begin(),std::bind2nd(std::plus<int>(),2*ghostLev));
+              int sz((*it2).second->size());
+              for(int i=0;i<sz;i++)
+                {
+                  const DataArrayDouble *otherArr((*it2).second->at(i));
+                  DataArrayDouble *thisArr((*it).second->at(i));
+                  MCAuto<DataArrayDouble> partOfOther(MEDCouplingStructuredMesh::ExtractFieldOfDoubleFrom(otherSt,otherArr,pOther));
+                  MEDCouplingStructuredMesh::AssignPartOfFieldOfDoubleUsing(thisSt,thisArr,pThis,partOfOther);
+                }
+            }
+        }
+    }
+}
+
 void MEDCouplingGridCollection::SynchronizeFineToCoarse(int ghostLev, const MEDCouplingGridCollection *fine, const MEDCouplingGridCollection *coarse)
 {
   if(!fine || !coarse)
     throw INTERP_KERNEL::Exception("MEDCouplingGridCollection::SynchronizeFineToCoarse : one or more input pointer is NULL !");
-  const std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >& mf(fine->_map_of_dadc);
-  const std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >& mc(coarse->_map_of_dadc);
-  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::const_iterator it=mf.begin();it!=mf.end();it++)
+  const std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >& mf(fine->_map_of_dadc);
+  const std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >& mc(coarse->_map_of_dadc);
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::const_iterator it=mf.begin();it!=mf.end();it++)
     {
       const MEDCouplingCartesianAMRMeshGen *fineMesh((*it).first);
       const MEDCouplingCartesianAMRMeshGen *fatherOfFineMesh(fineMesh->getFather());
       bool found(false);
-      for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::const_iterator it0=mc.begin();it0!=mc.end() && !found;it0++)
+      for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::const_iterator it0=mc.begin();it0!=mc.end() && !found;it0++)
         {
           if((*it0).first==fatherOfFineMesh)
             {
@@ -325,14 +540,14 @@ void MEDCouplingGridCollection::SynchronizeCoarseToFine(int ghostLev, const MEDC
 {
   if(!fine || !coarse)
     throw INTERP_KERNEL::Exception("MEDCouplingGridCollection::SynchronizeCoarseToFine : one or more input pointer is NULL !");
-  const std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >& mf(fine->_map_of_dadc);
-  const std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >& mc(coarse->_map_of_dadc);
-  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::const_iterator it=mf.begin();it!=mf.end();it++)
+  const std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >& mf(fine->_map_of_dadc);
+  const std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >& mc(coarse->_map_of_dadc);
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::const_iterator it=mf.begin();it!=mf.end();it++)
     {
       const MEDCouplingCartesianAMRMeshGen *fineMesh((*it).first);
       const MEDCouplingCartesianAMRMeshGen *fatherOfFineMesh(fineMesh->getFather());
       bool found(false);
-      for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::const_iterator it0=mc.begin();it0!=mc.end() && !found;it0++)
+      for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::const_iterator it0=mc.begin();it0!=mc.end() && !found;it0++)
         {
           if((*it0).first==fatherOfFineMesh)
             {
@@ -395,7 +610,7 @@ std::vector< std::pair<const MEDCouplingCartesianAMRPatch *,const MEDCouplingCar
 {
   std::vector< std::pair<const MEDCouplingCartesianAMRPatch *,const MEDCouplingCartesianAMRPatch *> > ret;
   std::map<const MEDCouplingCartesianAMRMeshGen *,std::vector< const MEDCouplingCartesianAMRMeshGen * > > m;
-  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::const_iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::const_iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
     {
       const MEDCouplingCartesianAMRMeshGen *fineMesh((*it).first);
       const MEDCouplingCartesianAMRMeshGen *fatherOfFineMesh(fineMesh->getFather());
@@ -424,14 +639,14 @@ void MEDCouplingGridCollection::SynchronizeCoarseToFineOnlyInGhostZone(int ghost
 {
   if(!fine || !coarse)
     throw INTERP_KERNEL::Exception("MEDCouplingGridCollection::SynchronizeCoarseToFineOnlyInGhostZone : one or more input pointer is NULL !");
-  const std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >& mf(fine->_map_of_dadc);
-  const std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >& mc(coarse->_map_of_dadc);
-  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::const_iterator it=mf.begin();it!=mf.end();it++)
+  const std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >& mf(fine->_map_of_dadc);
+  const std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >& mc(coarse->_map_of_dadc);
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::const_iterator it=mf.begin();it!=mf.end();it++)
     {
       const MEDCouplingCartesianAMRMeshGen *fineMesh((*it).first);
       const MEDCouplingCartesianAMRMeshGen *fatherOfFineMesh(fineMesh->getFather());
       bool found(false);
-      for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::const_iterator it0=mc.begin();it0!=mc.end() && !found;it0++)
+      for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::const_iterator it0=mc.begin();it0!=mc.end() && !found;it0++)
         {
           if((*it0).first==fatherOfFineMesh)
             {
@@ -449,7 +664,7 @@ void MEDCouplingGridCollection::SynchronizeCoarseToFineOnlyInGhostZone(int ghost
 
 void MEDCouplingGridCollection::fillIfInTheProgenyOf(const std::string& fieldName, const MEDCouplingCartesianAMRMeshGen *head, std::vector<const DataArrayDouble *>& recurseArrs) const
 {
-  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::const_iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::const_iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
     {
       const MEDCouplingCartesianAMRMeshGen *a((*it).first);
       if(head==a || head->isObjectInTheProgeny(a))
@@ -472,28 +687,37 @@ MEDCouplingGridCollection::MEDCouplingGridCollection(const std::vector<const MED
     }
 }
 
+MEDCouplingGridCollection::MEDCouplingGridCollection(const MEDCouplingGridCollection& other, const MEDCouplingCartesianAMRMeshGen *newGf, const MEDCouplingCartesianAMRMeshGen *oldGf):RefCountObject(other),_map_of_dadc(other._map_of_dadc.size())
+{
+  std::size_t sz(other._map_of_dadc.size());
+  for(std::size_t i=0;i<sz;i++)
+    {
+      std::vector<int> pos(other._map_of_dadc[i].first->getPositionRelativeTo(oldGf));
+      _map_of_dadc[i].first=newGf->getMeshAtPosition(pos);
+      const DataArrayDoubleCollection *dac(other._map_of_dadc[i].second);
+      if(dac)
+        _map_of_dadc[i].second=dac->deepCopy();
+    }
+}
+
 std::size_t MEDCouplingGridCollection::getHeapMemorySizeWithoutChildren() const
 {
   std::size_t ret(sizeof(MEDCouplingGridCollection));
-  ret+=_map_of_dadc.capacity()*sizeof(std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> >);
+  ret+=_map_of_dadc.capacity()*sizeof(std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> >);
   return ret;
 }
 
-std::vector<const BigMemoryObject *> MEDCouplingGridCollection::getDirectChildren() const
+std::vector<const BigMemoryObject *> MEDCouplingGridCollection::getDirectChildrenWithNull() const
 {
   std::vector<const BigMemoryObject *> ret;
-  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::const_iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
-    {
-      const DataArrayDoubleCollection *col((*it).second);
-      if(col)
-        ret.push_back(col);
-    }
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::const_iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
+    ret.push_back((const DataArrayDoubleCollection *)(*it).second);
   return ret;
 }
 
 void MEDCouplingGridCollection::updateTime() const
 {
-  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MEDCouplingAutoRefCountObjectPtr<DataArrayDoubleCollection> > >::const_iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRMeshGen *,MCAuto<DataArrayDoubleCollection> > >::const_iterator it=_map_of_dadc.begin();it!=_map_of_dadc.end();it++)
     {
       const MEDCouplingCartesianAMRMeshGen *a((*it).first);
       if(a)
@@ -504,15 +728,63 @@ void MEDCouplingGridCollection::updateTime() const
     }
 }
 
+/// @endcond
+
+MEDCouplingCartesianAMRMesh *MEDCouplingDataForGodFather::getMyGodFather()
+{
+  return _gf;
+}
+
+const MEDCouplingCartesianAMRMesh *MEDCouplingDataForGodFather::getMyGodFather() const
+{
+  return _gf;
+}
+
+MEDCouplingDataForGodFather::MEDCouplingDataForGodFather(MEDCouplingCartesianAMRMesh *gf):_gf(gf),_tlc(gf)
+{
+  if(!gf)
+    throw INTERP_KERNEL::Exception("MEDCouplingDataForGodFather constructor : A data has to be attached to a AMR Mesh instance !");
+  gf->incrRef();
+}
+
+void MEDCouplingDataForGodFather::checkGodFatherFrozen() const
+{
+  _tlc.checkConst();
+}
+
+bool MEDCouplingDataForGodFather::changeGodFather(MEDCouplingCartesianAMRMesh *gf)
+{
+  bool ret(_tlc.keepTrackOfNewTL(gf));
+  if(ret)
+    {
+      _gf=gf;
+      if(gf)
+        gf->incrRef();
+    }
+  return ret;
+}
+
+MEDCouplingDataForGodFather::MEDCouplingDataForGodFather(const MEDCouplingDataForGodFather& other, bool deepCpyGF):RefCountObject(other),_gf(other._gf),_tlc(other._gf)
+{
+  other._tlc.checkConst();
+  if(deepCpyGF)
+    {
+      const MEDCouplingCartesianAMRMesh *gf(other._gf);
+      if(gf)
+        _gf=gf->deepCopy(0);
+      _tlc.keepTrackOfNewTL(_gf);
+    }
+}
+
 /*!
  * This method creates, attach to a main AMR mesh \a gf ( called god father :-) ) and returns a data linked to \a gf ready for the computation.
  */
-MEDCouplingAMRAttribute *MEDCouplingAMRAttribute::New(MEDCouplingCartesianAMRMeshGen *gf, const std::vector< std::pair<std::string,int> >& fieldNames, int ghostLev)
+MEDCouplingAMRAttribute *MEDCouplingAMRAttribute::New(MEDCouplingCartesianAMRMesh *gf, const std::vector< std::pair<std::string,int> >& fieldNames, int ghostLev)
 {
   return new MEDCouplingAMRAttribute(gf,fieldNames,ghostLev);
 }
 
-MEDCouplingAMRAttribute *MEDCouplingAMRAttribute::New(MEDCouplingCartesianAMRMeshGen *gf, const std::vector< std::pair<std::string, std::vector<std::string> > >& fieldNames, int ghostLev)
+MEDCouplingAMRAttribute *MEDCouplingAMRAttribute::New(MEDCouplingCartesianAMRMesh *gf, const std::vector< std::pair<std::string, std::vector<std::string> > >& fieldNames, int ghostLev)
 {
   std::size_t sz(fieldNames.size());
   std::vector< std::pair<std::string,int> > fieldNames2(sz);
@@ -523,7 +795,7 @@ MEDCouplingAMRAttribute *MEDCouplingAMRAttribute::New(MEDCouplingCartesianAMRMes
       fieldNames2[i].second=(int)fieldNames[i].second.size();
       compNames[i]=fieldNames[i].second;
     }
-  MEDCouplingAutoRefCountObjectPtr<MEDCouplingAMRAttribute> ret(New(gf,fieldNames2,ghostLev));
+  MCAuto<MEDCouplingAMRAttribute> ret(New(gf,fieldNames2,ghostLev));
   ret->spillInfoOnComponents(compNames);
   return ret.retn();
 }
@@ -537,10 +809,41 @@ MEDCouplingAMRAttribute *MEDCouplingAMRAttribute::New(MEDCouplingCartesianAMRMes
 void MEDCouplingAMRAttribute::spillInfoOnComponents(const std::vector< std::vector<std::string> >& compNames)
 {
   _tlc.checkConst();
-  for(std::vector< MEDCouplingAutoRefCountObjectPtr<MEDCouplingGridCollection> >::iterator it=_levs.begin();it!=_levs.end();it++)
+  for(std::vector< MCAuto<MEDCouplingGridCollection> >::iterator it=_levs.begin();it!=_levs.end();it++)
     (*it)->spillInfoOnComponents(compNames);
 }
 
+/*!
+ * Assign nature for each fields in \a this.
+ * \param [in] nfs
+ */
+void MEDCouplingAMRAttribute::spillNatures(const std::vector<NatureOfField>& nfs)
+{
+  _tlc.checkConst();
+  for(std::vector< MCAuto<MEDCouplingGridCollection> >::iterator it=_levs.begin();it!=_levs.end();it++)
+    (*it)->spillNatures(nfs);
+}
+
+MEDCouplingAMRAttribute *MEDCouplingAMRAttribute::deepCopy() const
+{
+  return new MEDCouplingAMRAttribute(*this,true);
+}
+
+MEDCouplingAMRAttribute *MEDCouplingAMRAttribute::deepCpyWithoutGodFather() const
+{
+  return new MEDCouplingAMRAttribute(*this,false);
+}
+
+/*!
+ * Returns the number of levels by \b only \b considering \a this (god father instance is considered only to see if it has not changed still last update of \a this).
+ *
+ */
+int MEDCouplingAMRAttribute::getNumberOfLevels() const
+{
+  checkGodFatherFrozen();
+  return (int)_levs.size();
+}
+
 /*!
  * This method returns all DataArrayDouble instances lying on the specified mesh \a mesh.
  * If \a mesh is not part of the progeny of god father object given at construction of \a this an exception will be thrown.
@@ -550,7 +853,7 @@ void MEDCouplingAMRAttribute::spillInfoOnComponents(const std::vector< std::vect
  */
 std::vector<DataArrayDouble *> MEDCouplingAMRAttribute::retrieveFieldsOn(MEDCouplingCartesianAMRMeshGen *mesh) const
 {
-  for(std::vector< MEDCouplingAutoRefCountObjectPtr<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++)
+  for(std::vector< MCAuto<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++)
     {
       int tmp(-1);
       if((*it)->presenceOf(mesh,tmp))
@@ -567,7 +870,7 @@ std::vector<DataArrayDouble *> MEDCouplingAMRAttribute::retrieveFieldsOn(MEDCoup
  */
 const DataArrayDouble *MEDCouplingAMRAttribute::getFieldOn(MEDCouplingCartesianAMRMeshGen *mesh, const std::string& fieldName) const
 {
-  for(std::vector< MEDCouplingAutoRefCountObjectPtr<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++)
+  for(std::vector< MCAuto<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++)
     {
       int tmp(-1);
       if((*it)->presenceOf(mesh,tmp))
@@ -576,7 +879,21 @@ const DataArrayDouble *MEDCouplingAMRAttribute::getFieldOn(MEDCouplingCartesianA
           return ddc.getFieldWithName(fieldName);
         }
     }
-  throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::retrieveFieldOn : the mesh specified is not in the progeny of this !");
+  throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::getFieldOn : the mesh specified is not in the progeny of this !");
+}
+
+DataArrayDouble *MEDCouplingAMRAttribute::getFieldOn(MEDCouplingCartesianAMRMeshGen *mesh, const std::string& fieldName)
+{
+  for(std::vector< MCAuto<MEDCouplingGridCollection> >::iterator it=_levs.begin();it!=_levs.end();it++)
+    {
+      int tmp(-1);
+      if((*it)->presenceOf(mesh,tmp))
+        {
+          DataArrayDoubleCollection& ddc((*it)->getFieldsAt(tmp));
+          return ddc.getFieldWithName(fieldName);
+        }
+    }
+  throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::getFieldOn non const : the mesh specified is not in the progeny of this !");
 }
 
 /*!
@@ -589,7 +906,7 @@ MEDCouplingFieldDouble *MEDCouplingAMRAttribute::buildCellFieldOnRecurseWithoutO
 {
   std::vector<const DataArrayDouble *> recurseArrs;
   std::size_t lev(0);
-  for(std::vector< MEDCouplingAutoRefCountObjectPtr<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++,lev++)
+  for(std::vector< MCAuto<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++,lev++)
     {
       int tmp(-1);
       if((*it)->presenceOf(mesh,tmp))
@@ -619,7 +936,7 @@ MEDCouplingFieldDouble *MEDCouplingAMRAttribute::buildCellFieldOnRecurseWithoutO
 MEDCouplingFieldDouble *MEDCouplingAMRAttribute::buildCellFieldOnWithGhost(MEDCouplingCartesianAMRMeshGen *mesh, const std::string& fieldName) const
 {
   const DataArrayDouble *arr(0);
-  for(std::vector< MEDCouplingAutoRefCountObjectPtr<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++)
+  for(std::vector< MCAuto<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++)
     {
       int tmp(-1);
       if((*it)->presenceOf(mesh,tmp))
@@ -630,8 +947,8 @@ MEDCouplingFieldDouble *MEDCouplingAMRAttribute::buildCellFieldOnWithGhost(MEDCo
     }
   if(!arr)
     throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::buildCellFieldOnWithGhost : the mesh specified is not in the progeny of this !");
-  MEDCouplingAutoRefCountObjectPtr<MEDCouplingIMesh> im(mesh->getImageMesh()->buildWithGhost(_ghost_lev));
-  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret(MEDCouplingFieldDouble::New(ON_CELLS));
+  MCAuto<MEDCouplingIMesh> im(mesh->getImageMesh()->buildWithGhost(_ghost_lev));
+  MCAuto<MEDCouplingFieldDouble> ret(MEDCouplingFieldDouble::New(ON_CELLS));
   ret->setMesh(im);
   ret->setArray(const_cast<DataArrayDouble *>(arr));
   ret->setName(arr->getName());
@@ -648,9 +965,8 @@ MEDCouplingFieldDouble *MEDCouplingAMRAttribute::buildCellFieldOnWithGhost(MEDCo
  */
 MEDCouplingFieldDouble *MEDCouplingAMRAttribute::buildCellFieldOnWithoutGhost(MEDCouplingCartesianAMRMeshGen *mesh, const std::string& fieldName) const
 {
-  //tony
   const DataArrayDouble *arr(0);
-  for(std::vector< MEDCouplingAutoRefCountObjectPtr<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++)
+  for(std::vector< MCAuto<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++)
     {
       int tmp(-1);
       if((*it)->presenceOf(mesh,tmp))
@@ -662,26 +978,188 @@ MEDCouplingFieldDouble *MEDCouplingAMRAttribute::buildCellFieldOnWithoutGhost(ME
   if(!arr)
     throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::buildCellFieldOnWithoutGhost : the mesh specified is not in the progeny of this !");
   //
-  MEDCouplingAutoRefCountObjectPtr<MEDCouplingIMesh> im(mesh->getImageMesh()->buildWithGhost(_ghost_lev));
+  MCAuto<MEDCouplingIMesh> im(mesh->getImageMesh()->buildWithGhost(_ghost_lev));
   std::vector<int> cgs(mesh->getImageMesh()->getCellGridStructure()),cgsWG(im->getCellGridStructure());
-  MEDCouplingAutoRefCountObjectPtr<DataArrayDouble> arr2(DataArrayDouble::New());
+  MCAuto<DataArrayDouble> arr2(DataArrayDouble::New());
   arr2->alloc(mesh->getImageMesh()->getNumberOfCells(),arr->getNumberOfComponents());
   std::vector< std::pair<int,int> > cgs2(MEDCouplingStructuredMesh::GetCompactFrmtFromDimensions(cgs));
-  MEDCouplingCartesianAMRPatch::ApplyGhostOnCompactFrmt(cgs2,_ghost_lev);
+  MEDCouplingStructuredMesh::ApplyGhostOnCompactFrmt(cgs2,_ghost_lev);
   std::vector<int> fakeFactors(mesh->getImageMesh()->getSpaceDimension(),1);
   MEDCouplingIMesh::SpreadCoarseToFine(arr,cgsWG,arr2,cgs2,fakeFactors);
   arr2->copyStringInfoFrom(*arr);
   //
-  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret(MEDCouplingFieldDouble::New(ON_CELLS));
+  MCAuto<MEDCouplingFieldDouble> ret(MEDCouplingFieldDouble::New(ON_CELLS));
   ret->setMesh(mesh->getImageMesh());
   ret->setArray(arr2);
   ret->setName(arr->getName());
   return ret.retn();
 }
 
+
+std::string MEDCouplingAMRAttribute::writeVTHB(const std::string& fileName) const
+{
+  static const char EXT[]=".vthb";
+  std::string baseName,extName,zeFileName;
+  MEDCouplingMesh::SplitExtension(fileName,baseName,extName);
+  if(extName==EXT)
+    zeFileName=fileName;
+  else
+    { zeFileName=baseName; zeFileName+=EXT; }
+  //
+  std::ofstream ofs(fileName.c_str());
+  ofs << "<VTKFile type=\"vtkOverlappingAMR\" version=\"1.1\" byte_order=\"" << MEDCouplingByteOrderStr() << "\">\n";
+  const MEDCouplingCartesianAMRMesh *gf(getMyGodFather());
+  ofs << "  <vtkOverlappingAMR origin=\"";
+  const MEDCouplingIMesh *gfm(gf->getImageMesh());
+  std::vector<double> orig(gfm->getOrigin());
+  std::vector<double> spacing(gfm->getDXYZ());
+  int dim((int)orig.size());
+  std::copy(orig.begin(),orig.end(),std::ostream_iterator<double>(ofs," ")); ofs << "\" grid_description=\"";
+  for(int i=0;i<dim;i++)
+    {
+      char tmp[2]; tmp[0]='X'+i; tmp[1]='\0';
+      ofs << tmp;
+    }
+  ofs << "\">\n";
+  //
+  int maxLev(gf->getMaxNumberOfLevelsRelativeToThis()),kk(0);
+  for(int i=0;i<maxLev;i++)
+    {
+      std::vector<MEDCouplingCartesianAMRPatchGen *> patches(gf->retrieveGridsAt(i));
+      std::size_t sz(patches.size());
+      std::vector< MCAuto<MEDCouplingCartesianAMRPatchGen> > patchesSafe(sz);
+      for(std::size_t j=0;j<sz;j++)
+        patchesSafe[j]=patches[j];
+      if(sz==0)
+        continue;
+      ofs << "    <Block level=\"" << i << "\" spacing=\"";
+      std::copy(spacing.begin(),spacing.end(),std::ostream_iterator<double>(ofs," "));
+      ofs << "\">\n";
+      if(i!=maxLev-1)
+        {
+          std::vector<int> factors(patches[0]->getMesh()->getFactors());
+          for(int k=0;k<dim;k++)
+            spacing[k]*=1./((double) factors[k]);
+        }
+      std::size_t jj(0);
+      for(std::vector<MEDCouplingCartesianAMRPatchGen *>::const_iterator it=patches.begin();it!=patches.end();it++,jj++,kk++)
+        {
+          ofs << "      <DataSet index=\"" << jj << "\" amr_box=\"";
+          const MEDCouplingCartesianAMRPatch *patchCast(dynamic_cast<const MEDCouplingCartesianAMRPatch *>(*it));
+          const MEDCouplingCartesianAMRMeshGen *mesh((*it)->getMesh());
+          if(patchCast)
+            {
+              const std::vector< std::pair<int,int> >& bltr(patchCast->getBLTRRangeRelativeToGF());
+              for(int pp=0;pp<dim;pp++)
+                ofs << bltr[pp].first << " " << bltr[pp].second-1 << " ";
+            }
+          else
+            {
+              const MEDCouplingIMesh *im((*it)->getMesh()->getImageMesh());
+              std::vector<int> cgs(im->getCellGridStructure());
+              for(int pp=0;pp<dim;pp++)
+                ofs << "0 " << cgs[pp]-1 << " ";
+            }
+          ofs << "\" file=\"";
+          //
+          int tmp(-1);
+          if(_levs[i]->presenceOf((*it)->getMesh(),tmp))
+            {
+              const DataArrayDoubleCollection& ddc(_levs[i]->getFieldsAt(tmp));
+              std::vector<DataArrayDouble *> arrs(ddc.retrieveFields());
+              std::size_t nbFields(arrs.size());
+              std::vector< MCAuto<DataArrayDouble> > arrsSafe(nbFields),arrs2Safe(nbFields);
+              std::vector< const MEDCouplingFieldDouble *> fields(nbFields);
+              std::vector< MCAuto<MEDCouplingFieldDouble> > fieldsSafe(nbFields);
+              for(std::size_t pp=0;pp<nbFields;pp++)
+                arrsSafe[pp]=arrs[pp];
+              for(std::size_t pp=0;pp<nbFields;pp++)
+                {
+                  MCAuto<MEDCouplingIMesh> im(mesh->getImageMesh()->buildWithGhost(_ghost_lev));
+                  std::vector<int> cgs(mesh->getImageMesh()->getCellGridStructure()),cgsWG(im->getCellGridStructure());
+                  arrs2Safe[pp]=DataArrayDouble::New();
+                  arrs2Safe[pp]->alloc(mesh->getImageMesh()->getNumberOfCells(),arrs[pp]->getNumberOfComponents());
+                  std::vector< std::pair<int,int> > cgs2(MEDCouplingStructuredMesh::GetCompactFrmtFromDimensions(cgs));
+                  MEDCouplingStructuredMesh::ApplyGhostOnCompactFrmt(cgs2,_ghost_lev);
+                  std::vector<int> fakeFactors(mesh->getImageMesh()->getSpaceDimension(),1);
+                  MEDCouplingIMesh::SpreadCoarseToFine(arrs[pp],cgsWG,arrs2Safe[pp],cgs2,fakeFactors);
+                  arrs2Safe[pp]->copyStringInfoFrom(*arrs[pp]);
+                  //
+                  fieldsSafe[pp]=MEDCouplingFieldDouble::New(ON_CELLS); fields[pp]=fieldsSafe[pp];
+                  fieldsSafe[pp]->setMesh(mesh->getImageMesh());
+                  fieldsSafe[pp]->setArray(arrs2Safe[pp]);
+                  fieldsSafe[pp]->setName(arrs[pp]->getName());
+                }
+              std::ostringstream vtiFileName; vtiFileName << baseName << "_" << kk << ".vti";
+              MEDCouplingFieldDouble::WriteVTK(vtiFileName.str(),fields,true);
+              //
+              ofs << vtiFileName.str() << "\">\n";
+              ofs << "      \n      </DataSet>\n";
+            }
+        }
+      ofs << "    </Block>\n";
+    }
+  //
+  ofs << "  </vtkOverlappingAMR>\n";
+  ofs << "</VTKFile>\n";
+  return zeFileName;
+}
+
+  /*!
+   * This method is useful just after a remesh after a time step computation to project values in \a this to the new
+   * mesh \a targetGF.
+   *
+   * This method performs a projection from \a this to a target AMR mesh \a targetGF.
+   * This method performs the projection by trying to transfer the finest information to \a targetGF.
+ * \b WARNING this method does not update the ghost zone, if any.
+ * The level0 of \a this god father must have the same structure than those of \a targetGF.
+ *
+ * This method makes checks that ghost size of \a this and \a targetGF are the same, and that
+ * the number of levels in \a this and in \a targetGF are also the same.
+ */
+MEDCouplingAMRAttribute *MEDCouplingAMRAttribute::projectTo(MEDCouplingCartesianAMRMesh *targetGF) const
+{
+  if(!targetGF)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::projectTo : given other target god is NULL !");
+  if(_levs.empty())
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::projectTo : no levels in this !");
+  const MEDCouplingGridCollection *lev0(_levs[0]);
+  if(!lev0)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::projectTo : lev0 is NULL !");
+  std::vector< std::pair < std::string, std::vector<std::string> > > fieldNames(lev0->getInfoOnComponents());
+  MCAuto<MEDCouplingAMRAttribute> ret(MEDCouplingAMRAttribute::New(targetGF,fieldNames,_ghost_lev));
+  ret->spillNatures(lev0->getNatures());
+  ret->alloc();
+  int nbLevs(getNumberOfLevels());
+  if(targetGF->getMaxNumberOfLevelsRelativeToThis()!=nbLevs)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::projectTo : number of levels of this and targetGF must be the same !");
+  // first step copy level0
+  if(getMyGodFather()->getImageMesh()->getCellGridStructure()!=targetGF->getImageMesh()->getCellGridStructure())
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::projectTo : god father of this and target ones do not have the same structure !");
+  const DataArrayDoubleCollection& col(lev0->getFieldsAt(0));
+  DataArrayDoubleCollection& colTarget(ret->_levs[0]->getFieldsAt(0));
+  colTarget.copyFrom(col);
+  // then go deeper and deeper
+  for(int i=1;i<nbLevs;i++)
+    {
+      ret->synchronizeCoarseToFineByOneLevel(i-1);
+      MEDCouplingGridCollection *targetCol(ret->_levs[i]);
+      if(!targetCol)
+        throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::projectTo : null lev of target !");
+      const MEDCouplingGridCollection *thisCol(_levs[i]);
+      if(!thisCol)
+        throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::projectTo : null lev of this !");
+      targetCol->copyOverlappedZoneFrom(_ghost_lev,*thisCol);
+    }
+  return ret.retn();
+}
+
 /*!
  * This method synchronizes from fine to coarse direction arrays. This method makes the hypothesis that \a this has been allocated before using
  * MEDCouplingAMRAttribute::alloc method.
+ * This method \b DOES \b NOT \b UPDATE the ghost zones (neither the fine not the coarse)
+ *
+ * \sa synchronizeFineToCoarseBetween
  */
 void MEDCouplingAMRAttribute::synchronizeFineToCoarse()
 {
@@ -692,14 +1170,37 @@ void MEDCouplingAMRAttribute::synchronizeFineToCoarse()
   while(sz>1)
     {
       sz--;
-      const MEDCouplingGridCollection *fine(_levs[sz]),*coarse(_levs[sz-1]);
-      MEDCouplingGridCollection::SynchronizeFineToCoarse(_ghost_lev,fine,coarse);
+      synchronizeFineToCoarseByOneLevel((int)sz);
     }
 }
 
+/*!
+ * This method allows to synchronizes fields on fine patches on level \a fromLev to coarser patches at \a toLev level.
+ * This method operates step by step performing the synchronization the \a fromLev to \a fromLev - 1, then \a fromLev -1 to \a fromLev - 2 ...
+ * until reaching \a toLev level.
+ * This method \b DOES \b NOT \b UPDATE the ghost zones (neither the fine not the coarse).
+ *
+ * \param [in] fromLev - an existing level considered as fine so bigger than \a toLev
+ * \param [in] toLev - an existing level considered as the target level to reach.
+ *
+ */
+void MEDCouplingAMRAttribute::synchronizeFineToCoarseBetween(int fromLev, int toLev)
+{
+  int nbl(getNumberOfLevels());
+  if(fromLev<0 || toLev<0 || fromLev>=nbl || toLev>=nbl)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeFineToCoarseBetween : fromLev and toLev must be >= 0 and lower than number of levels in this !");
+  if(fromLev==toLev)
+    return ;//nothing to do
+  if(fromLev<toLev)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeFineToCoarseBetween : the fromLev level is lower than toLev level ! Call synchronizeFineToCoarseBetween ");
+  for(int i=fromLev;i>toLev;i--)
+    synchronizeFineToCoarseByOneLevel(i);
+}
+
 /*!
  * This method synchronizes from coarse to fine arrays and fine to fine each other (if _ghost_lev is >0). This method makes the hypothesis that \a this has been allocated before using
  * MEDCouplingAMRAttribute::alloc method.
+ * This method \b DOES \b UPDATE \b the \b ghost \b zone (contrary to synchronizeFineToCoarse method)
  */
 void MEDCouplingAMRAttribute::synchronizeCoarseToFine()
 {
@@ -707,11 +1208,30 @@ void MEDCouplingAMRAttribute::synchronizeCoarseToFine()
     throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeCoarseToFine : not any levels in this !");
   std::size_t sz(_levs.size());
   //
-  for(std::size_t i=1;i<sz;i++)
-    {
-      const MEDCouplingGridCollection *fine(_levs[i]),*coarse(_levs[i-1]);
-      MEDCouplingGridCollection::SynchronizeCoarseToFine(_ghost_lev,coarse,fine);
-    }
+  for(std::size_t i=0;i<sz-1;i++)
+    synchronizeCoarseToFineByOneLevel((int)i);
+}
+
+/*!
+ * This method allows to synchronizes fields on coarse patches on level \a fromLev to their respective refined patches at \a toLev level.
+ * This method operates step by step performing the synchronization the \a fromLev to \a fromLev + 1, then \a fromLev + 1 to \a fromLev + 2 ...
+ * until reaching \a toLev level.
+ * This method \b DOES \b UPDATE \b the \b ghost \b zone (contrary to synchronizeFineToCoarseBetween method)
+ *
+ * \param [in] fromLev - an existing level considered as coarse so lower than \a toLev
+ * \param [in] toLev - an existing level considered as the target level to reach.
+ */
+void MEDCouplingAMRAttribute::synchronizeCoarseToFineBetween(int fromLev, int toLev)
+{
+  int nbl(getNumberOfLevels());
+  if(fromLev<0 || toLev<0 || fromLev>=nbl || toLev>=nbl)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeCoarseToFineBetween : fromLev and toLev must be >= 0 and lower than number of levels in this !");
+  if(fromLev==toLev)
+    return ;//nothing to do
+  if(fromLev>toLev)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeCoarseToFineBetween : the fromLev level is greater than toLev level ! Call synchronizeFineToCoarseBetween instead !");
+  for(int i=fromLev;i<toLev;i++)
+    synchronizeCoarseToFineByOneLevel(i);
 }
 
 /*!
@@ -728,22 +1248,22 @@ void MEDCouplingAMRAttribute::synchronizeCoarseToFine()
  */
 void MEDCouplingAMRAttribute::synchronizeAllGhostZones()
 {
-  if(_levs.empty())
+  int sz(getNumberOfLevels());
+  if(sz==0)
     throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeFineEachOther : not any levels in this !");
   // 1st - synchronize from coarse to the finest all the patches (excepted the god father one)
-  std::size_t sz(_levs.size());
-  for(std::size_t i=1;i<sz;i++)
+  for(int i=1;i<sz;i++)
     {
       const MEDCouplingGridCollection *fine(_levs[i]),*coarse(_levs[i-1]);
       MEDCouplingGridCollection::SynchronizeCoarseToFineOnlyInGhostZone(_ghost_lev,coarse,fine);
     }
   // 2nd - classical direct sublevel inside common patch
-  for(std::size_t i=1;i<sz;i++)
+  for(int i=1;i<sz;i++)
     {
-      const MEDCouplingGridCollection *fine(_levs[i]);
-      if(!fine)
+      const MEDCouplingGridCollection *curLev(_levs[i]);
+      if(!curLev)
         throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeFineEachOtherInGhostZone : presence of a NULL element !");
-      fine->synchronizeFineEachOther(_ghost_lev,_neighbors[i]);
+      curLev->synchronizeFineEachOther(_ghost_lev,_neighbors[i]);
     }
   // 3rd - mixed level
   for(std::vector< std::pair<const MEDCouplingCartesianAMRPatch *,const MEDCouplingCartesianAMRPatch *> >::const_iterator it=_mixed_lev_neighbors.begin();it!=_mixed_lev_neighbors.end();it++)
@@ -752,13 +1272,78 @@ void MEDCouplingAMRAttribute::synchronizeAllGhostZones()
       DataArrayDoubleCollection::SynchronizeGhostZoneOfOneUsingTwo(_ghost_lev,(*it).first,firstDAC,(*it).second,secondDAC);
     }
   // 4th - same level but with far ancestor.
-  for(std::size_t i=1;i<sz;i++)
+  for(int i=1;i<sz;i++)
     {
       const MEDCouplingGridCollection *fine(_levs[i]);
       fine->synchronizeFineEachOtherExt(_ghost_lev,_cross_lev_neighbors[i]);
     }
 }
 
+/*!
+ * This method works \b ONLY \b ON \b DIRECT \b SONS \b OF \a mesh. So only a part of patches at a given level is updated here.
+ * The ghost zone of all of these sons of \a mesh are updated using the brother patches (the patches sharing the \b SAME \a mesh).
+ * It is sometimes possible that a ghost zone of some sons of \a mesh are covered by a patch of same level but different father.
+ * For such cases, the ghost zones are \b NOT updated. If you need a more thorough (but more costly) ghost zone update use synchronizeAllGhostZonesAtASpecifiedLevel method instead.
+ *
+ * \param [in] mesh - an element in the progeny of god father in \a this, which the ghost zone of its sons will be updated each other.
+ *
+ */
+void MEDCouplingAMRAttribute::synchronizeAllGhostZonesOfDirectChidrenOf(const MEDCouplingCartesianAMRMeshGen *mesh)
+{
+  if(!mesh)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeAllGhostZonesOfDirectChidrenOf : input mesh is NULL !");
+  int level(mesh->getAbsoluteLevelRelativeTo(_gf)),sz(getNumberOfLevels());
+  if(level<0 || level>=sz-1)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeAllGhostZonesOfDirectChidrenOf : the specified level does not exist ! Must be in [0,nbOfLevelsOfThis-1) !");
+  const std::vector< std::pair<const MEDCouplingCartesianAMRPatch *,const MEDCouplingCartesianAMRPatch *> >& itemsToFilter(_neighbors[level+1]);
+  std::vector< std::pair<const MEDCouplingCartesianAMRPatch *,const MEDCouplingCartesianAMRPatch *> > itemsToSync; itemsToSync.reserve(itemsToFilter.size());
+  for(std::vector< std::pair<const MEDCouplingCartesianAMRPatch *,const MEDCouplingCartesianAMRPatch *> >::const_iterator it=itemsToFilter.begin();it!=itemsToFilter.end();it++)
+    {
+      if((*it).first->getMesh()->getFather()==mesh && (*it).second->getMesh()->getFather()==mesh)
+        itemsToSync.push_back(std::pair<const MEDCouplingCartesianAMRPatch *,const MEDCouplingCartesianAMRPatch *>((*it).first,(*it).second));
+    }
+  const MEDCouplingGridCollection *curLev(_levs[level+1]);
+  if(!curLev)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeAllGhostZonesOfDirectChidrenOf : presence of a NULL element !");
+  curLev->synchronizeFineEachOther(_ghost_lev,itemsToSync);
+}
+
+/*!
+ * This method updates \b all the patches at level \a level each other without consideration of their father.
+ * So this method is more time consuming than synchronizeAllGhostZonesOfDirectChidrenOf.
+ */
+void MEDCouplingAMRAttribute::synchronizeAllGhostZonesAtASpecifiedLevel(int level)
+{
+  int maxLev(getNumberOfLevels());
+  if(level<0 || level>=maxLev)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeAllGhostZonesAtASpecifiedLevel : the specified level must be in [0,maxLevel) !");
+  if(level==0)
+    return ;//at level 0 only one patch -> no need to update
+  // 1st step - updates all patches pairs at level \a level sharing the same father
+  const std::vector< std::pair<const MEDCouplingCartesianAMRPatch *,const MEDCouplingCartesianAMRPatch *> >& items(_neighbors[level]);
+  const MEDCouplingGridCollection *curLev(_levs[level]);
+  if(!curLev)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeAllGhostZonesAtASpecifiedLevel : presence of a NULL element !");
+  curLev->synchronizeFineEachOther(_ghost_lev,items);
+  //2nd step - updates all patches pairs at level \a level not sharing the same father
+  const std::vector< std::pair<const MEDCouplingCartesianAMRPatch *,const MEDCouplingCartesianAMRPatch *> >& items2(_cross_lev_neighbors[level]);
+  curLev->synchronizeFineEachOtherExt(_ghost_lev,items2);
+}
+
+/*!
+ * This method updates ghost zones of patches at level \a level whatever their father \b using \b father \b patches \b ONLY (at level \b level - 1).
+ * This method is useful to propagate to the ghost zone of childhood the modification.
+ */
+void MEDCouplingAMRAttribute::synchronizeAllGhostZonesAtASpecifiedLevelUsingOnlyFather(int level)
+{
+  int maxLev(getNumberOfLevels());
+  if(level<=0 || level>=maxLev)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeAllGhostZonesAtASpecifiedLevelUsingOnlyFather : the specified level must be in (0,maxLevel) !");
+  const MEDCouplingGridCollection *fine(_levs[level]),*coarse(_levs[level-1]);
+  MEDCouplingGridCollection::SynchronizeCoarseToFineOnlyInGhostZone(_ghost_lev,coarse,fine);
+  //_cross_lev_neighbors is not needed.
+}
+
 /*!
  * This method allocates all DataArrayDouble instances stored recursively in \a this.
  *
@@ -767,7 +1352,7 @@ void MEDCouplingAMRAttribute::synchronizeAllGhostZones()
 void MEDCouplingAMRAttribute::alloc()
 {
   _tlc.resetState();
-  for(std::vector< MEDCouplingAutoRefCountObjectPtr<MEDCouplingGridCollection> >::iterator it=_levs.begin();it!=_levs.end();it++)
+  for(std::vector< MCAuto<MEDCouplingGridCollection> >::iterator it=_levs.begin();it!=_levs.end();it++)
     {
       MEDCouplingGridCollection *elt(*it);
       if(elt)
@@ -784,7 +1369,7 @@ void MEDCouplingAMRAttribute::alloc()
 void MEDCouplingAMRAttribute::dealloc()
 {
   _tlc.checkConst();
-  for(std::vector< MEDCouplingAutoRefCountObjectPtr<MEDCouplingGridCollection> >::iterator it=_levs.begin();it!=_levs.end();it++)
+  for(std::vector< MCAuto<MEDCouplingGridCollection> >::iterator it=_levs.begin();it!=_levs.end();it++)
     {
       MEDCouplingGridCollection *elt(*it);
       if(elt)
@@ -794,7 +1379,7 @@ void MEDCouplingAMRAttribute::dealloc()
     }
 }
 
-bool MEDCouplingAMRAttribute::changeGodFather(MEDCouplingCartesianAMRMeshGen *gf)
+bool MEDCouplingAMRAttribute::changeGodFather(MEDCouplingCartesianAMRMesh *gf)
 {
   bool ret(MEDCouplingDataForGodFather::changeGodFather(gf));
   return ret;
@@ -803,19 +1388,15 @@ bool MEDCouplingAMRAttribute::changeGodFather(MEDCouplingCartesianAMRMeshGen *gf
 std::size_t MEDCouplingAMRAttribute::getHeapMemorySizeWithoutChildren() const
 {
   std::size_t ret(sizeof(MEDCouplingAMRAttribute));
-  ret+=_levs.capacity()*sizeof(MEDCouplingAutoRefCountObjectPtr<MEDCouplingGridCollection>);
+  ret+=_levs.capacity()*sizeof(MCAuto<MEDCouplingGridCollection>);
   return ret;
 }
 
-std::vector<const BigMemoryObject *> MEDCouplingAMRAttribute::getDirectChildren() const
+std::vector<const BigMemoryObject *> MEDCouplingAMRAttribute::getDirectChildrenWithNull() const
 {
   std::vector<const BigMemoryObject *> ret;
-  for(std::vector< MEDCouplingAutoRefCountObjectPtr<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++)
-    {
-      const MEDCouplingGridCollection *elt(*it);
-      if(elt)
-        ret.push_back(elt);
-    }
+  for(std::vector< MCAuto<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++)
+    ret.push_back((const MEDCouplingGridCollection *)*it);
   return ret;
 }
 
@@ -823,7 +1404,7 @@ void MEDCouplingAMRAttribute::updateTime() const
 {//tony
 }
 
-MEDCouplingAMRAttribute::MEDCouplingAMRAttribute(MEDCouplingCartesianAMRMeshGen *gf, const std::vector< std::pair<std::string,int> >& fieldNames, int ghostLev):MEDCouplingDataForGodFather(gf),_ghost_lev(ghostLev)
+MEDCouplingAMRAttribute::MEDCouplingAMRAttribute(MEDCouplingCartesianAMRMesh *gf, const std::vector< std::pair<std::string,int> >& fieldNames, int ghostLev):MEDCouplingDataForGodFather(gf),_ghost_lev(ghostLev)
 {
   //gf non empty, checked by constructor
   int maxLev(gf->getMaxNumberOfLevelsRelativeToThis());
@@ -832,7 +1413,7 @@ MEDCouplingAMRAttribute::MEDCouplingAMRAttribute(MEDCouplingCartesianAMRMeshGen
     {
       std::vector<MEDCouplingCartesianAMRPatchGen *> patches(gf->retrieveGridsAt(i));
       std::size_t sz(patches.size());
-      std::vector< MEDCouplingAutoRefCountObjectPtr<MEDCouplingCartesianAMRPatchGen> > patchesSafe(patches.size());
+      std::vector< MCAuto<MEDCouplingCartesianAMRPatchGen> > patchesSafe(patches.size());
       for(std::size_t j=0;j<sz;j++)
         patchesSafe[j]=patches[j];
       std::vector<const MEDCouplingCartesianAMRMeshGen *> ms(sz);
@@ -871,9 +1452,61 @@ MEDCouplingAMRAttribute::MEDCouplingAMRAttribute(MEDCouplingCartesianAMRMeshGen
     }
 }
 
+MEDCouplingAMRAttribute::MEDCouplingAMRAttribute(const MEDCouplingAMRAttribute& other, bool deepCpyGF):MEDCouplingDataForGodFather(other,deepCpyGF),_ghost_lev(other._ghost_lev),_levs(other._levs.size()),_neighbors(other._neighbors),_mixed_lev_neighbors(other._mixed_lev_neighbors),_cross_lev_neighbors(other._cross_lev_neighbors)
+{
+  std::size_t sz(other._levs.size());
+  for(std::size_t i=0;i<sz;i++)
+    {
+      const MEDCouplingGridCollection *elt(other._levs[i]);
+      if(elt)
+        {
+          _levs[i]=other._levs[i]->deepCopy(_gf,other._gf);
+        }
+    }
+  //_cross_lev_neighbors(other._cross_lev_neighbors)
+  sz=other._neighbors.size();
+  for(std::size_t i=0;i<sz;i++)
+    {
+      const std::vector< std::pair<const MEDCouplingCartesianAMRPatch *,const MEDCouplingCartesianAMRPatch *> >& neigh2(other._neighbors[i]);
+      std::size_t sz2(neigh2.size());
+      std::vector< std::pair<const MEDCouplingCartesianAMRPatch *,const MEDCouplingCartesianAMRPatch *> >& neigh3(_neighbors[i]);
+      for(std::size_t j=0;j<sz2;j++)
+        {
+          const MEDCouplingCartesianAMRPatch *p1(neigh2[j].first),*p2(neigh2[j].second);
+          std::vector<int> pp1(p1->getMesh()->getPositionRelativeTo(other._gf)),pp2(p2->getMesh()->getPositionRelativeTo(other._gf));
+          neigh3[j].first=_gf->getPatchAtPosition(pp1);
+          neigh3[j].second=_gf->getPatchAtPosition(pp2);
+        }
+    }
+  //
+  sz=other._mixed_lev_neighbors.size();
+  for(std::size_t i=0;i<sz;i++)
+    {
+      const MEDCouplingCartesianAMRPatch *p1(other._mixed_lev_neighbors[i].first),*p2(other._mixed_lev_neighbors[i].second);
+      std::vector<int> pp1(p1->getMesh()->getPositionRelativeTo(other._gf)),pp2(p2->getMesh()->getPositionRelativeTo(other._gf));
+      _mixed_lev_neighbors[i].first=_gf->getPatchAtPosition(pp1);
+      _mixed_lev_neighbors[i].second=_gf->getPatchAtPosition(pp2);
+    }
+  //
+  sz=other._cross_lev_neighbors.size();
+  for(std::size_t i=0;i<sz;i++)
+    {
+      const std::vector< std::pair<const MEDCouplingCartesianAMRPatch *,const MEDCouplingCartesianAMRPatch *> >& neigh2(other._cross_lev_neighbors[i]);
+      std::size_t sz2(neigh2.size());
+      std::vector< std::pair<const MEDCouplingCartesianAMRPatch *,const MEDCouplingCartesianAMRPatch *> >& neigh3(_cross_lev_neighbors[i]);
+      for(std::size_t j=0;j<sz2;j++)
+        {
+          const MEDCouplingCartesianAMRPatch *p1(neigh2[j].first),*p2(neigh2[j].second);
+          std::vector<int> pp1(p1->getMesh()->getPositionRelativeTo(other._gf)),pp2(p2->getMesh()->getPositionRelativeTo(other._gf));
+          neigh3[j].first=_gf->getPatchAtPosition(pp1);
+          neigh3[j].second=_gf->getPatchAtPosition(pp2);
+        }
+    }
+}
+
 const DataArrayDoubleCollection& MEDCouplingAMRAttribute::findCollectionAttachedTo(const MEDCouplingCartesianAMRMeshGen *m) const
 {
-  for(std::vector< MEDCouplingAutoRefCountObjectPtr<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++)
+  for(std::vector< MCAuto<MEDCouplingGridCollection> >::const_iterator it=_levs.begin();it!=_levs.end();it++)
     {
       const MEDCouplingGridCollection *elt(*it);
       if(elt)
@@ -887,3 +1520,21 @@ const DataArrayDoubleCollection& MEDCouplingAMRAttribute::findCollectionAttached
     }
   throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::findCollectionAttachedTo : unable to find such part of mesh in this !");
 }
+
+void MEDCouplingAMRAttribute::synchronizeFineToCoarseByOneLevel(int level)
+{
+  int nbl(getNumberOfLevels());
+  if(level<=0 || level>=nbl)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeFineToCoarseByOneLevel : the input level must be in ]0,nb_of_levels[ !");
+  const MEDCouplingGridCollection *fine(_levs[level]),*coarse(_levs[level-1]);
+  MEDCouplingGridCollection::SynchronizeFineToCoarse(_ghost_lev,fine,coarse);
+}
+
+void MEDCouplingAMRAttribute::synchronizeCoarseToFineByOneLevel(int level)
+{
+  int nbl(getNumberOfLevels());
+  if(level<0 || level>=nbl-1)
+    throw INTERP_KERNEL::Exception("MEDCouplingAMRAttribute::synchronizeFineToCoarseByOneLevel : the input level must be in [0,nb_of_levels[ !");
+  const MEDCouplingGridCollection *fine(_levs[level+1]),*coarse(_levs[level]);
+  MEDCouplingGridCollection::SynchronizeCoarseToFine(_ghost_lev,coarse,fine);
+}