Merge from V6_main 12/04/2013

[modules/med.git] / src / MEDCoupling / MEDCouplingFieldDouble.cxx

// Copyright (C) 2007-2013  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.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
//
// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
//
// Author : Anthony Geay (CEA/DEN)

#include "MEDCouplingFieldDouble.hxx"
#include "MEDCouplingFieldTemplate.hxx"
#include "MEDCouplingUMesh.hxx"
#include "MEDCouplingTimeDiscretization.hxx"
#include "MEDCouplingFieldDiscretization.hxx"
#include "MEDCouplingAutoRefCountObjectPtr.hxx"
#include "MEDCouplingNatureOfField.hxx"

#include "InterpKernelAutoPtr.hxx"

#include <sstream>
#include <limits>
#include <algorithm>
#include <functional>

using namespace ParaMEDMEM;

/*!
 * Creates a new instance of MEDCouplingFieldDouble of given type. The caller is responsable for the returned field.
 *
 * \param [in] type type of spatial discretization of a created field (\ref ParaMEDMEM::ON_CELLS "ON_CELLS", \ref ParaMEDMEM::ON_NODES "ON_NODES", \ref ParaMEDMEM::ON_GAUSS_PT "ON_GAUSS_PT", \ref ParaMEDMEM::ON_GAUSS_NE "ON_GAUSS_NE", \ref ParaMEDMEM::ON_NODES_KR "ON_NODES_KR").
 * \param [in] td type of time discretization of a created field (\ref ParaMEDMEM::NO_TIME "NO_TIME", \ref ParaMEDMEM::ONE_TIME "ONE_TIME", \ref ParaMEDMEM::LINEAR_TIME "LINEAR_TIME", \ref ParaMEDMEM::CONST_ON_TIME_INTERVAL "CONST_ON_TIME_INTERVAL").
 
 * \return a newly allocated field the caller should deal with.
 */
MEDCouplingFieldDouble *MEDCouplingFieldDouble::New(TypeOfField type, TypeOfTimeDiscretization td)
{
  return new MEDCouplingFieldDouble(type,td);
}

/*!
 * Creates a new instance of MEDCouplingFieldDouble of given type. The caller is responsable for the returned field.
 * ** WARINING : This method do not deeply copy neither mesh nor spatial discretization. Only a shallow copy (reference) is done for mesh and spatial discretization ! **
 *
 * \param [in] ft \ref MEDCouplingFieldTemplatesPage "field template" defining its spatial discretization and supporting mesh.
 * \param [in] td type of time discretization of a created field (\ref ParaMEDMEM::NO_TIME "NO_TIME", \ref ParaMEDMEM::ONE_TIME "ONE_TIME", \ref ParaMEDMEM::LINEAR_TIME "LINEAR_TIME", \ref ParaMEDMEM::CONST_ON_TIME_INTERVAL "CONST_ON_TIME_INTERVAL")
 
 * \return a newly allocated field the caller should deal with.
 */
MEDCouplingFieldDouble *MEDCouplingFieldDouble::New(const MEDCouplingFieldTemplate& ft, TypeOfTimeDiscretization td)
{
  return new MEDCouplingFieldDouble(ft,td);
}

/*!
 * Sets time \a unit of \a this field.
 *
 * \param [in] unit \a unit (string) in which time is measured.
 */
void MEDCouplingFieldDouble::setTimeUnit(const char *unit)
{
  _time_discr->setTimeUnit(unit);
}

/*!
 * Returns a time unit of \a this field.
 *
 * \return a string describing units in which time is measured.
 */
const char *MEDCouplingFieldDouble::getTimeUnit() const
{
  return _time_discr->getTimeUnit();
}

/*!
 * This method if possible the time information (time unit, time iteration, time unit and time value) with its support
 * that is to say its mesh.
 * 
 * \throw  If \c this->_mesh is null an exception will be thrown. An exception will also be throw if the spatial discretization is
 *         NO_TIME.
 */
void MEDCouplingFieldDouble::synchronizeTimeWithSupport() throw(INTERP_KERNEL::Exception)
{
  _time_discr->synchronizeTimeWith(_mesh);
}

/*!
 * This method performs a copy of \a this **without any copy of the underlying mesh** ( see warning section of this method).
 * The copy of arrays is deep if \b recDeepCpy equals to true, no copy of arrays is done if \b recDeepCpy equals to false.
 *
 * \c clone(false) is rather dedicated for advanced users that want to limit the amount of memory.
 * 
 * It allows the user to perform methods
 * MEDCouplingFieldDouble::AddFields, MEDCouplingFieldDouble::MultiplyFields with \a this and the returned field.
 * 
 * \warning The \b underlying \b mesh of the returned field is \b always the same (same pointer) than \a this **whatever the value** of \a recDeepCpy parameter.
 * If the user wants to duplicated deeply the underlying mesh he should call MEDCouplingFieldDouble::cloneWithMesh method or MEDCouplingFieldDouble::deepCpy instead.
 *
 * \param [in] recDeepCpy specifies if underlying arrays in \a this should be copied or only attached to the returned field.
 * \return a newly allocated MEDCouplingFieldDouble instance that the caller should deal with.
 * \sa ParaMEDMEM::MEDCouplingFieldDouble::cloneWithMesh(bool recDeepCpy) const
 */
MEDCouplingFieldDouble *MEDCouplingFieldDouble::clone(bool recDeepCpy) const
{
  return new MEDCouplingFieldDouble(*this,recDeepCpy);
}

/*!
 * This method behaves exactly like MEDCouplingFieldDouble::clone method **except that here the underlying mesh is systematically **
 * (whatever the value of the input parameter \a recDeepCpy) **deeply duplicated**.
 *
 * The result of \c cloneWithMesh(true) is exactly the same than calling \ref MEDCouplingFieldDouble::deepCpy "deepCpy".
 * 
 * So the resulting field of this call cannot be called with \a this with the following methods MEDCouplingFieldDouble::AddFields, MEDCouplingFieldDouble::MultiplyFields ...
 * To avoid to deep copy the underlying mesh the user should call MEDCouplingFieldDouble::clone method instead.

 * \param [in] recDeepCpy specifies if underlying arrays in \a this should be copied or only attached to the returned field.
 * \return a newly allocated MEDCouplingFieldDouble instance that the caller should deal with.
 * \sa ParaMEDMEM::MEDCouplingFieldDouble::clone(bool recDeepCpy) const
 */
MEDCouplingFieldDouble *MEDCouplingFieldDouble::cloneWithMesh(bool recDeepCpy) const
{
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=clone(recDeepCpy);
  if(_mesh)
    {
      MEDCouplingAutoRefCountObjectPtr<MEDCouplingMesh> mCpy=_mesh->deepCpy();
      ret->setMesh(mCpy);
    }
  return ret.retn();
}

/*!
 * This method performs a deepCpy of \a this (**mesh included**)!
 * So the resulting field of this call cannot be called with \a this with following methods MEDCouplingFieldDouble::AddFields, MEDCouplingFieldDouble::MultiplyFields ...
 * To avoid deep copying the underlying mesh the user should call MEDCouplingFieldDouble::clone method instead.
 * This method is exactly equivalent to MEDCouplingFieldDouble::cloneWithMesh called with parameter true.
 *
 * \return a newly allocated MEDCouplingFieldDouble instance that the caller should deal with.
 * \sa ParaMEDMEM::MEDCouplingFieldDouble::cloneWithMesh(bool recDeepCpy) const
 */
MEDCouplingFieldDouble *MEDCouplingFieldDouble::deepCpy() const
{
  return cloneWithMesh(true);
}

/*!
 * TODOC
 * 
 * \param [in] td type of time discretization of a created field (\ref ParaMEDMEM::NO_TIME "NO_TIME", \ref ParaMEDMEM::ONE_TIME "ONE_TIME", \ref ParaMEDMEM::LINEAR_TIME "LINEAR_TIME", \ref ParaMEDMEM::CONST_ON_TIME_INTERVAL "CONST_ON_TIME_INTERVAL").
 * \param [in] deepCopy specifies if underlying arrays in \a this should be copied or only attached to the returned field.
 * \return a newly allocated MEDCouplingFieldDouble instance that the caller should deal with.
 *
 * \ref cpp_mcfielddouble_buildnewtimereprfromthis "Here a C++ example."
 
 * \ref py_mcfielddouble_buildnewtimereprfromthis "Here a Python example."
 * \sa ParaMEDMEM::MEDCouplingFieldDouble::clone(bool recDeepCpy) const
 */
MEDCouplingFieldDouble *MEDCouplingFieldDouble::buildNewTimeReprFromThis(TypeOfTimeDiscretization td, bool deepCopy) const
{
  MEDCouplingTimeDiscretization *tdo=_time_discr->buildNewTimeReprFromThis(td,deepCopy);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDiscretization> disc;
  if(_type)
    disc=_type->clone();
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(getNature(),tdo,disc.retn());
  ret->setMesh(getMesh());
  ret->setName(getName());
  ret->setDescription(getDescription());
  return ret.retn();
}

/*!
 * Copy tiny info (component names, name, description) but warning the underlying mesh is not renamed (for safety reason).
 */
void MEDCouplingFieldDouble::copyTinyStringsFrom(const MEDCouplingField *other) throw(INTERP_KERNEL::Exception)
{
  MEDCouplingField::copyTinyStringsFrom(other);
  const MEDCouplingFieldDouble *otherC=dynamic_cast<const MEDCouplingFieldDouble *>(other);
  if(otherC)
    {
      _time_discr->copyTinyStringsFrom(*otherC->_time_discr);
    }
}

/*!
 * Copy only times, order, iteration from other. The underlying mesh is not impacted by this method.
 * Arrays are not impacted too.
 */
void MEDCouplingFieldDouble::copyTinyAttrFrom(const MEDCouplingFieldDouble *other) throw(INTERP_KERNEL::Exception)
{
  if(other)
    {
      _time_discr->copyTinyAttrFrom(*other->_time_discr);
    }
  
}

void MEDCouplingFieldDouble::copyAllTinyAttrFrom(const MEDCouplingFieldDouble *other) throw(INTERP_KERNEL::Exception)
{
  copyTinyStringsFrom(other);
  copyTinyAttrFrom(other);
}

std::string MEDCouplingFieldDouble::simpleRepr() const
{
  std::ostringstream ret;
  ret << "FieldDouble with name : \"" << getName() << "\"\n";
  ret << "Description of field is : \"" << getDescription() << "\"\n";
  if(_type)
    { ret << "FieldDouble space discretization is : " << _type->getStringRepr() << "\n"; }
  else
    { ret << "FieldDouble has no spatial discretization !\n"; }
  if(_time_discr)
    { ret << "FieldDouble time discretization is : " << _time_discr->getStringRepr() << "\n"; }
  else
    { ret << "FieldDouble has no time discretization !\n"; }
  ret << "FieldDouble nature of field is : \"" << MEDCouplingNatureOfField::GetReprNoThrow(_nature) << "\"\n";
  if(getArray())
    {
      if(getArray()->isAllocated())
        {
          int nbOfCompo=getArray()->getNumberOfComponents();
          ret << "FieldDouble default array has " << nbOfCompo << " components and " << getArray()->getNumberOfTuples() << " tuples.\n";
          ret << "FieldDouble default array has following info on components : ";
          for(int i=0;i<nbOfCompo;i++)
            ret << "\"" << getArray()->getInfoOnComponent(i) << "\" ";
          ret << "\n";
        }
      else
        {
          ret << "Array set but not allocated !\n";
        }
    }
  if(_mesh)
    ret << "Mesh support information :\n__________________________\n" << _mesh->simpleRepr();
  else
    ret << "Mesh support information : No mesh set !\n";
  return ret.str();
}

std::string MEDCouplingFieldDouble::advancedRepr() const
{
  std::ostringstream ret;
  ret << "FieldDouble with name : \"" << getName() << "\"\n";
  ret << "Description of field is : \"" << getDescription() << "\"\n";
  if(_type)
    { ret << "FieldDouble space discretization is : " << _type->getStringRepr() << "\n"; }
  else
    { ret << "FieldDouble has no space discretization set !\n"; }
  if(_time_discr)
    { ret << "FieldDouble time discretization is : " << _time_discr->getStringRepr() << "\n"; }
  else
    { ret << "FieldDouble has no time discretization set !\n"; }
  if(getArray())
    ret << "FieldDouble default array has " << getArray()->getNumberOfComponents() << " components and " << getArray()->getNumberOfTuples() << " tuples.\n";
  if(_mesh)
    ret << "Mesh support information :\n__________________________\n" << _mesh->advancedRepr();
  else
    ret << "Mesh support information : No mesh set !\n";
  std::vector<DataArrayDouble *> arrays;
  _time_discr->getArrays(arrays);
  int arrayId=0;
  for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++,arrayId++)
    {
      ret << "Array #" << arrayId << " :\n__________\n";
      if(*iter)
        (*iter)->reprWithoutNameStream(ret);
      else
        ret << "Array empty !";
      ret << "\n";
    }
  return ret.str();
}

void MEDCouplingFieldDouble::writeVTK(const char *fileName) const throw(INTERP_KERNEL::Exception)
{
  std::vector<const MEDCouplingFieldDouble *> fs(1,this);
  MEDCouplingFieldDouble::WriteVTK(fileName,fs);
}

bool MEDCouplingFieldDouble::isEqualIfNotWhy(const MEDCouplingField *other, double meshPrec, double valsPrec, std::string& reason) const throw(INTERP_KERNEL::Exception)
{
  if(!other)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::isEqualIfNotWhy : other instance is NULL !");
  const MEDCouplingFieldDouble *otherC=dynamic_cast<const MEDCouplingFieldDouble *>(other);
  if(!otherC)
    {
      reason="field given in input is not castable in MEDCouplingFieldDouble !";
      return false;
    }
  if(!MEDCouplingField::isEqualIfNotWhy(other,meshPrec,valsPrec,reason))
    return false;
  if(!_time_discr->isEqualIfNotWhy(otherC->_time_discr,valsPrec,reason))
    {
      reason.insert(0,"In FieldDouble time discretizations differ :");
      return false;
    }
  return true;
}

bool MEDCouplingFieldDouble::isEqualWithoutConsideringStr(const MEDCouplingField *other, double meshPrec, double valsPrec) const
{
  const MEDCouplingFieldDouble *otherC=dynamic_cast<const MEDCouplingFieldDouble *>(other);
  if(!otherC)
    return false;
  if(!MEDCouplingField::isEqualWithoutConsideringStr(other,meshPrec,valsPrec))
    return false;
  if(!_time_discr->isEqualWithoutConsideringStr(otherC->_time_discr,valsPrec))
    return false;
  return true;
}

/*!
 * This method states if \a this and 'other' are compatibles each other before performing any treatment.
 * This method is good for methods like : mergeFields.
 * This method is not very demanding compared to areStrictlyCompatible that is better for operation on fields.
 */
bool MEDCouplingFieldDouble::areCompatibleForMerge(const MEDCouplingField *other) const
{
  if(!MEDCouplingField::areCompatibleForMerge(other))
    return false;
  const MEDCouplingFieldDouble *otherC=dynamic_cast<const MEDCouplingFieldDouble *>(other);
  if(!otherC)
    return false;
  if(!_time_discr->areCompatible(otherC->_time_discr))
    return false;
  return true;
}

/*!
 * This method is more strict than MEDCouplingField::areCompatibleForMerge method.
 * This method is used for operation on fields to operate a first check before attempting operation.
 */
bool MEDCouplingFieldDouble::areStrictlyCompatible(const MEDCouplingField *other) const
{
  std::string tmp;
  if(!MEDCouplingField::areStrictlyCompatible(other))
    return false;
  const MEDCouplingFieldDouble *otherC=dynamic_cast<const MEDCouplingFieldDouble *>(other);
  if(!otherC)
    return false;
  if(!_time_discr->areStrictlyCompatible(otherC->_time_discr,tmp))
    return false;
  return true;
}

/*!
 * Method with same principle than MEDCouplingFieldDouble::areStrictlyCompatible method except that
 * number of components between \a this and 'other' can be different here (for operator*).
 */
bool MEDCouplingFieldDouble::areCompatibleForMul(const MEDCouplingField *other) const
{
  if(!MEDCouplingField::areStrictlyCompatible(other))
    return false;
  const MEDCouplingFieldDouble *otherC=dynamic_cast<const MEDCouplingFieldDouble *>(other);
  if(!otherC)
    return false;
  if(!_time_discr->areStrictlyCompatibleForMul(otherC->_time_discr))
    return false;
  return true;
}

/*!
 * Method with same principle than MEDCouplingFieldDouble::areStrictlyCompatible method except that
 * number of components between \a this and 'other' can be different here (for operator/).
 */
bool MEDCouplingFieldDouble::areCompatibleForDiv(const MEDCouplingField *other) const
{
  if(!MEDCouplingField::areStrictlyCompatible(other))
    return false;
  const MEDCouplingFieldDouble *otherC=dynamic_cast<const MEDCouplingFieldDouble *>(other);
  if(!otherC)
    return false;
  if(!_time_discr->areStrictlyCompatibleForDiv(otherC->_time_discr))
    return false;
  return true;
}

/*!
 * This method is invocated before any attempt of melding. This method is very close to areStrictlyCompatible,
 * except that \a this and other can have different number of components.
 */
bool MEDCouplingFieldDouble::areCompatibleForMeld(const MEDCouplingFieldDouble *other) const
{
  if(!MEDCouplingField::areStrictlyCompatible(other))
    return false;
  if(!_time_discr->areCompatibleForMeld(other->_time_discr))
    return false;
  return true;
}

/*!
 * This method performs a clone of mesh and a renumbering of underlying cells of it. The number of cells remains the same.
 * The values of field are impacted in consequence to have the same geometrical field.
 */
void MEDCouplingFieldDouble::renumberCells(const int *old2NewBg, bool check) throw(INTERP_KERNEL::Exception)
{
  renumberCellsWithoutMesh(old2NewBg,check);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingMesh> m=_mesh->deepCpy();
  m->renumberCells(old2NewBg,check);
  setMesh(m);
  updateTime();
}

/*!
 * \b WARNING : use this method with lot of care !
 * This method performs half job of MEDCouplingFieldDouble::renumberCells. That is to say no permutation of cells is done on underlying mesh.
 * That is to say, the field content is changed by this method. The reason of this method is only for multi-field instances lying on the same mesh to
 * avoid a systematic duplication and renumbering of _mesh attribute.
 */
void MEDCouplingFieldDouble::renumberCellsWithoutMesh(const int *old2NewBg, bool check) throw(INTERP_KERNEL::Exception)
{
   if(!_mesh)
     throw INTERP_KERNEL::Exception("Expecting a defined mesh to be able to operate a renumbering !");
   if(!((const MEDCouplingFieldDiscretization *)_type))
     throw INTERP_KERNEL::Exception("Expecting a spatial discretization to be able to operate a renumbering !");
  //
  _type->renumberCells(old2NewBg,check);
  std::vector<DataArrayDouble *> arrays;
  _time_discr->getArrays(arrays);
  _type->renumberArraysForCell(_mesh,arrays,old2NewBg,check);
  //
  updateTime();
}

/*!
 * This method performs a clone of mesh and a renumbering of underlying nodes of it. The number of nodes remains not compulsory the same as renumberCells method.
 * The values of field are impacted in consequence to have the same geometrical field.
 * 
 * \sa MEDCouplingFieldDouble::renumberNodesWithoutMesh
 */
void MEDCouplingFieldDouble::renumberNodes(const int *old2NewBg, double eps) throw(INTERP_KERNEL::Exception)
{
  const MEDCouplingPointSet *meshC=dynamic_cast<const MEDCouplingPointSet *>(_mesh);
  if(!meshC)
    throw INTERP_KERNEL::Exception("Invalid mesh to apply renumberNodes on it !");
  int nbOfNodes=meshC->getNumberOfNodes();
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingPointSet> meshC2((MEDCouplingPointSet *)meshC->deepCpy());
  int newNbOfNodes=*std::max_element(old2NewBg,old2NewBg+nbOfNodes)+1;
  renumberNodesWithoutMesh(old2NewBg,newNbOfNodes,eps);
  meshC2->renumberNodes(old2NewBg,newNbOfNodes);
  setMesh(meshC2);
}

/*!
 * \b WARNING : use this method with lot of care !
 * ** WARNING : in case of throw the content in array can be partially modified until the exception raises **
 * This method performs half job of MEDCouplingFieldDouble::renumberNodes. That is to say no permutation of nodes is done on underlying mesh.
 * That is to say, the field content is changed by this method. As the API suggests, this method can performs the half job of nodes contraction.
 * That's why an epsilon is given to specify a threshold of error in case of two nodes are merged but the difference of values on these nodes are higher than \a eps.
 */
void MEDCouplingFieldDouble::renumberNodesWithoutMesh(const int *old2NewBg, int newNbOfNodes, double eps) throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("Expecting a spatial discretization to be able to operate a renumbering !");
  std::vector<DataArrayDouble *> arrays;
  _time_discr->getArrays(arrays);
  for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++)
    if(*iter)
      _type->renumberValuesOnNodes(eps,old2NewBg,newNbOfNodes,*iter);
}

/*!
 * This method makes the assumption that the default array is set. If not an exception will be thrown.
 * This method is usable only if the default array has exactly one component. If not an exception will be thrown too.
 * This method returns all tuples ids that fit the range [vmin,vmax].
 * The caller has the responsability of the returned DataArrayInt.
 */
DataArrayInt *MEDCouplingFieldDouble::getIdsInRange(double vmin, double vmax) const throw(INTERP_KERNEL::Exception)
{
  if(getArray()==0)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::getIdsInRange : no default array set !");
  return getArray()->getIdsInRange(vmin,vmax);
}

/*!
 * Builds a newly created field, that the caller will have the responsability to deal with (decrRef).
 * This method makes the assumption that the field is correctly defined when this method is called, no check of this will be done.
 * This method returns a restriction of \a this so that only tuples id specified in 'part' will be contained in returned field.
 * Parameter 'part' specifies \b cell \b ids \b whatever \b the \b spatial \b discretization of \a this (ON_CELLS, ON_NODES, ON_GAUSS_PT, ON_GAUSS_NE)
 *
 * If \a this is a field on cell lying on a mesh that have 10 cells. If part contains following cellIds [3,7,6].
 * In this case the returned field will lie on mesh having 3 cells and the returned field will contain 3 tuples.
 * Tuple#0 of return field will refer to the cell#0 of returned mesh. The cell #0 of returned mesh will be equal to the cell#3 of 'this->getMesh()'
 * Tuple#1 of return field will refer to the cell#1 of returned mesh. The cell #1 of returned mesh will be equal to the cell#7 of 'this->getMesh()'
 * Tuple#2 of return field will refer to the cell#2 of returned mesh. The cell #2 of returned mesh will be equal to the cell#6 of 'this->getMesh()'
 *
 * If \a this is field on node lying on a mesh that have 10 cells and 11 nodes for example. If part contains following cellIds [3,7,6].
 * \a this is currently contains 11 tuples. If the restriction of mesh to 3 cells leads to a mesh with 6 nodes, the returned field,
 * will contain 6 tuples and this field will lie on this restricted mesh.
 *
 * \sa MEDCouplingFieldDouble::buildSubPartRange
 */
MEDCouplingFieldDouble *MEDCouplingFieldDouble::buildSubPart(const DataArrayInt *part) const throw(INTERP_KERNEL::Exception)
{
  if(part==0)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::buildSubPart : not empty array must be passed to this method !");
  return buildSubPart(part->begin(),part->end());
}

/*!
 * Builds a newly created field, that the caller will have the responsability to deal with.
 * \n This method makes the assumption that the field \a this is correctly defined when this method is called (\c this->checkCoherency() returns without any exception thrown), **no check of this will be done**.
 * \n This method returns a restriction of \a this so that only tuples id specified in [ \a partBg , \a partEnd ) will be contained in returned field. 
 * \n Parameter [\a partBg, \a partEnd ) specifies \b cell \b ids \b whatever \b the \b spatial \b discretization of \a this
 * (\ref ParaMEDMEM::ON_CELLS "ON_CELLS", \ref ParaMEDMEM::ON_NODES "ON_CELLS", \ref ParaMEDMEM::ON_GAUSS_PT "ON_GAUSS_PT", \ref ParaMEDMEM::ON_GAUSS_NE "ON_GAUSS_NE")
 *
 * If \a this is a field on cell lying on a mesh that have 10 cells. If part contains following cellIds [3,7,6].
 * In this case the returned field will lie on mesh having 3 cells and the returned field will contain 3 tuples.
 *
 *- Tuple#0 of return field will refer to the cell#0 of returned mesh. The cell #0 of returned mesh will be equal to the cell#3 of \c this->getMesh()
 *- Tuple#1 of return field will refer to the cell#1 of returned mesh. The cell #1 of returned mesh will be equal to the cell#7 of \c this->getMesh()
 *- Tuple#2 of return field will refer to the cell#2 of returned mesh. The cell #2 of returned mesh will be equal to the cell#6 of \c this->getMesh()
 *
 * If \a this is field on node lying on a mesh that have 10 cells and 11 nodes for example. So \a this is currently contains 11 tuples.
 * \n If part contains following cellIds [3,7,6].
 * \n If the restriction of mesh to 3 cells leads to a mesh with 6 nodes, the returned field,
 * will contain 6 tuples (and same number of components \c this->getArray()->getNumberOfComponents() ) and this field will lie on this restricted mesh.
 *
 * \param [in] partBg start (included) of input range cell ids to select [ \a partBg, \a partEnd )
 * \param [in] partEnd end (not included) of input range cell ids to select [ \a partBg, \a partEnd )
 * \return a newly allocated field the caller should deal with.
 * 
 * \throw if there is presence of an invalid cell id in [ \a partBg, \a partEnd ) regarding the number of cells of \c this->getMesh()
 *
 * \ref cpp_mcfielddouble_subpart1 "Here a C++ example."
 *
 * \ref py_mcfielddouble_subpart1 "Here a Python example."
 * \sa ParaMEDMEM::MEDCouplingFieldDouble::buildSubPart(const DataArrayInt *) const, MEDCouplingFieldDouble::buildSubPartRange
 */
MEDCouplingFieldDouble *MEDCouplingFieldDouble::buildSubPart(const int *partBg, const int *partEnd) const throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::buildSubPart : Expecting a not NULL spatial discretization !");
  DataArrayInt *arrSelect;
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingMesh> m=_type->buildSubMeshData(_mesh,partBg,partEnd,arrSelect);
  MEDCouplingAutoRefCountObjectPtr<DataArrayInt> arrSelect2(arrSelect);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=clone(false);//quick shallow copy.
  const MEDCouplingFieldDiscretization *disc=getDiscretization();
  if(disc)
    ret->setDiscretization(MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDiscretization>(disc->clonePart(partBg,partEnd)));
  ret->setMesh(m);
  std::vector<DataArrayDouble *> arrays;
  _time_discr->getArrays(arrays);
  std::vector<DataArrayDouble *> arrs;
  std::vector< MEDCouplingAutoRefCountObjectPtr<DataArrayDouble> > arrsSafe;
  const int *arrSelBg=arrSelect->begin();
  const int *arrSelEnd=arrSelect->end();
  for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++)
    {
      DataArrayDouble *arr=0;
      if(*iter)
        arr=(*iter)->selectByTupleIdSafe(arrSelBg,arrSelEnd);
      arrs.push_back(arr); arrsSafe.push_back(arr);
    }
  ret->_time_discr->setArrays(arrs,0);
  return ret.retn();
}

/*!
 * This method is equivalent to MEDCouplingFieldDouble::buildSubPart, the only difference is that the input range of cell ids is
 * given using a range given \a begin, \a end and \a step to optimize the part computation.
 * 
 * \sa MEDCouplingFieldDouble::buildSubPart
 */
MEDCouplingFieldDouble *MEDCouplingFieldDouble::buildSubPartRange(int begin, int end, int step) const throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::buildSubPart : Expecting a not NULL spatial discretization !");
  DataArrayInt *arrSelect;
  int beginOut,endOut,stepOut;
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingMesh> m=_type->buildSubMeshDataRange(_mesh,begin,end,step,beginOut,endOut,stepOut,arrSelect);
  MEDCouplingAutoRefCountObjectPtr<DataArrayInt> arrSelect2(arrSelect);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=clone(false);//quick shallow copy.
  const MEDCouplingFieldDiscretization *disc=getDiscretization();
  if(disc)
    ret->setDiscretization(MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDiscretization>(disc->clonePartRange(begin,end,step)));
  ret->setMesh(m);
  std::vector<DataArrayDouble *> arrays;
  _time_discr->getArrays(arrays);
  std::vector<DataArrayDouble *> arrs;
  std::vector< MEDCouplingAutoRefCountObjectPtr<DataArrayDouble> > arrsSafe;
  for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++)
    {
      DataArrayDouble *arr=0;
      if(*iter)
        {
          if(arrSelect)
            {
              const int *arrSelBg=arrSelect->begin();
              const int *arrSelEnd=arrSelect->end();
              arr=(*iter)->selectByTupleIdSafe(arrSelBg,arrSelEnd);
            }
          else
            arr=(*iter)->selectByTupleId2(beginOut,endOut,stepOut);
        }
      arrs.push_back(arr); arrsSafe.push_back(arr);
    }
  ret->_time_discr->setArrays(arrs,0);
  return ret.retn();
}

TypeOfTimeDiscretization MEDCouplingFieldDouble::getTimeDiscretization() const
{
  return _time_discr->getEnum();
}

MEDCouplingFieldDouble::MEDCouplingFieldDouble(TypeOfField type, TypeOfTimeDiscretization td):MEDCouplingField(type),
                                                                                              _time_discr(MEDCouplingTimeDiscretization::New(td))
{
}

/*!
 * ** WARINING : This method do not deeply copy neither mesh nor spatial discretization. Only a shallow copy (reference) is done for mesh and spatial discretization ! **
 */
MEDCouplingFieldDouble::MEDCouplingFieldDouble(const MEDCouplingFieldTemplate& ft, TypeOfTimeDiscretization td):MEDCouplingField(ft,false),
                                                                                                                _time_discr(MEDCouplingTimeDiscretization::New(td))
{
}

MEDCouplingFieldDouble::MEDCouplingFieldDouble(const MEDCouplingFieldDouble& other, bool deepCopy):MEDCouplingField(other,deepCopy),
                                                                                                   _time_discr(other._time_discr->performCpy(deepCopy))
{
}

MEDCouplingFieldDouble::MEDCouplingFieldDouble(NatureOfField n, MEDCouplingTimeDiscretization *td, MEDCouplingFieldDiscretization *type):MEDCouplingField(type,n),_time_discr(td)
{
}

MEDCouplingFieldDouble::~MEDCouplingFieldDouble()
{
  delete _time_discr;
}

void MEDCouplingFieldDouble::checkCoherency() const throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("Field invalid because no mesh specified !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::checkCoherency : no spatial discretization !");
  _time_discr->checkCoherency();
  _type->checkCoherencyBetween(_mesh,getArray());
}

/*!
 * Returns the accumulation (the sum) of comId_th component of each tuples of \b default and \b only \b default array.
 */
double MEDCouplingFieldDouble::accumulate(int compId) const
{
  if(getArray()==0)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::accumulate : no default array defined !");
  return getArray()->accumulate(compId);
}

/*!
 * Returns the accumulation (the sum) of all tuples of \b default and \b only default array.
 * The res is expected to be of size getNumberOfComponents().
 */
void MEDCouplingFieldDouble::accumulate(double *res) const
{
  if(getArray()==0)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::accumulate : no default array defined !");
  getArray()->accumulate(res);
}

/*!
 * This method returns the max value in \a this. \a this is expected to be a field with exactly \b one component. If not an exception will be thrown.
 * To getMaxValue on vector field applyFunc is needed before. This method looks only on all arrays stored in 'this->_time_discr'.
 * If no arrays exists, an exception will be thrown.
 */
double MEDCouplingFieldDouble::getMaxValue() const throw(INTERP_KERNEL::Exception)
{
  std::vector<DataArrayDouble *> arrays;
  _time_discr->getArrays(arrays);
  double ret=-std::numeric_limits<double>::max();
  bool isExistingArr=false;
  for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++)
    {
      if(*iter)
        {
          isExistingArr=true;
          int loc;
          ret=std::max(ret,(*iter)->getMaxValue(loc));
        }
    }
  if(!isExistingArr)
    throw INTERP_KERNEL::Exception("getMaxValue : No arrays defined !");
  return ret;
}

/*!
 * This method is an extension of ParaMEDMEM::MEDCouplingFieldDouble::getMaxValue method because the returned 
 * value is the same but this method also returns to you a tupleIds object which the caller have the responsibility
 * to deal with. The main difference is that the returned tupleIds is those corresponding the first set array.
 * If you have more than one array set (in LINEAR_TIME instance for example) only the first not null array will be used
 * to compute tupleIds.
 */
double MEDCouplingFieldDouble::getMaxValue2(DataArrayInt*& tupleIds) const throw(INTERP_KERNEL::Exception)
{
  std::vector<DataArrayDouble *> arrays;
  _time_discr->getArrays(arrays);
  double ret=-std::numeric_limits<double>::max();
  bool isExistingArr=false;
  tupleIds=0;
  MEDCouplingAutoRefCountObjectPtr<DataArrayInt> ret1;
  for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++)
    {
      if(*iter)
        {
          isExistingArr=true;
          DataArrayInt *tmp;
          ret=std::max(ret,(*iter)->getMaxValue2(tmp));
          MEDCouplingAutoRefCountObjectPtr<DataArrayInt> tmpSafe(tmp);
          if(!((const DataArrayInt *)ret1))
            ret1=tmpSafe;
        }
    }
  if(!isExistingArr)
    throw INTERP_KERNEL::Exception("getMaxValue2 : No arrays defined !");
  tupleIds=ret1.retn();
  return ret;
}

/*!
 * This method returns the min value in \a this. \a this is expected to be a field with exactly \b one component. If not an exception will be thrown.
 * To getMinValue on vector field applyFunc is needed before. This method looks only on all arrays stored in 'this->_time_discr'.
 * If no arrays exists, an exception will be thrown.
 */
double MEDCouplingFieldDouble::getMinValue() const throw(INTERP_KERNEL::Exception)
{
  std::vector<DataArrayDouble *> arrays;
  _time_discr->getArrays(arrays);
  double ret=std::numeric_limits<double>::max();
  bool isExistingArr=false;
  for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++)
    {
      if(*iter)
        {
          isExistingArr=true;
          int loc;
          ret=std::min(ret,(*iter)->getMinValue(loc));
        }
    }
  if(!isExistingArr)
    throw INTERP_KERNEL::Exception("getMinValue : No arrays defined !");
  return ret;
}

/*!
 * This method is an extension of ParaMEDMEM::MEDCouplingFieldDouble::getMinValue method because the returned 
 * value is the same but this method also returns to you a tupleIds object which the caller have the responsibility
 * to deal with. The main difference is that the returned tupleIds is those corresponding the first set array.
 * If you have more than one array set (in LINEAR_TIME instance for example) only the first not null array will be used
 * to compute tupleIds.
 */
double MEDCouplingFieldDouble::getMinValue2(DataArrayInt*& tupleIds) const throw(INTERP_KERNEL::Exception)
{
  std::vector<DataArrayDouble *> arrays;
  _time_discr->getArrays(arrays);
  double ret=-std::numeric_limits<double>::max();
  bool isExistingArr=false;
  tupleIds=0;
  MEDCouplingAutoRefCountObjectPtr<DataArrayInt> ret1;
  for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++)
    {
      if(*iter)
        {
          isExistingArr=true;
          DataArrayInt *tmp;
          ret=std::max(ret,(*iter)->getMinValue2(tmp));
          MEDCouplingAutoRefCountObjectPtr<DataArrayInt> tmpSafe(tmp);
          if(!((const DataArrayInt *)ret1))
            ret1=tmpSafe;
        }
    }
  if(!isExistingArr)
    throw INTERP_KERNEL::Exception("getMinValue2 : No arrays defined !");
  tupleIds=ret1.retn();
  return ret;
}

/*!
 * This method returns the average value in \a this. \a this is expected to be a field with exactly \b one component. If not an exception will be thrown.
 * To getAverageValue on vector field applyFunc is needed before. This method looks only \b default array \b and \b only \b default.
 * If default array does not exist, an exception will be thrown.
 */
double MEDCouplingFieldDouble::getAverageValue() const throw(INTERP_KERNEL::Exception)
{
  if(getArray()==0)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::getAverageValue : no default array defined !");
  return getArray()->getAverageValue();
}

/*!
 * This method returns the euclidean norm of \a this.
 * \f[
 * \sqrt{\sum_{0 \leq i < nbOfEntity}val[i]*val[i]}
 * \f]
 * If default array does not exist, an exception will be thrown.
 */
double MEDCouplingFieldDouble::norm2() const throw(INTERP_KERNEL::Exception)
{
  if(getArray()==0)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::norm2 : no default array defined !");
  return getArray()->norm2();
}

/*!
 * This method returns the max norm of \a this.
 * \f[
 * \max_{0 \leq i < nbOfEntity}{abs(val[i])}
 * \f]
 * If default array does not exist, an exception will be thrown.
 */
double MEDCouplingFieldDouble::normMax() const throw(INTERP_KERNEL::Exception)
{
  if(getArray()==0)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::normMax : no default array defined !");
  return getArray()->normMax();
}

/*!
 * This method returns the average value in \a this weighted by ParaMEDMEM::MEDCouplingField::buildMeasureField.
 * \a this is expected to be a field with exactly \b one component. If not an exception will be thrown.
 * To getAverageValue on vector field applyFunc is needed before. This method looks only \b default array \b and \b only \b default.
 * If default array does not exist, an exception will be thrown.
 * 
 * \param [out] res the location where the result will be stored. \a res is expected to be a location with \c this->getNumberOfComponents() places available.
 * \param [in] isWAbs specifies if abs is applied on measure on underlying mesh before performing computation. For a user already sure that all cells of its underlying mesh
 *                    are all well oriented this parameter can be set to false to be 'faster'. By default this parameter is true.
 */
void MEDCouplingFieldDouble::getWeightedAverageValue(double *res, bool isWAbs) const throw(INTERP_KERNEL::Exception)
{
  if(getArray()==0)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::getWeightedAverageValue : no default array defined !");
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> w=buildMeasureField(isWAbs);
  double deno=w->getArray()->accumulate(0);
  MEDCouplingAutoRefCountObjectPtr<DataArrayDouble> arr=getArray()->deepCpy();
  arr->multiplyEqual(w->getArray());
  std::transform(arr->begin(),arr->end(),arr->getPointer(),std::bind2nd(std::multiplies<double>(),1./deno));
  arr->accumulate(res);
}

/*!
 * This method returns the average value in \a this weighted by ParaMEDMEM::MEDCouplingField::buildMeasureField.
 * \a this is expected to be a field with exactly \b one component. If not an exception will be thrown.
 * To getAverageValue on vector field applyFunc is needed before. This method looks only \b default array \b and \b only \b default.
 * If default array does not exist, an exception will be thrown.
 * 
 * \param [in] compId The component id that should be in [0, \c this->getNumberOfComponents() ). If not an INTERP_KERNEL::Exception will be thrown.
 * \param [in] isWAbs specifies if abs is applied on measure on underlying mesh before performing computation. For a user already sure that all cells of its underlying mesh
 *                    are all well oriented this parameter can be set to false to be 'faster'. By default this parameter is true in C++ not in python (overloading confusion).
 */
double MEDCouplingFieldDouble::getWeightedAverageValue(int compId, bool isWAbs) const throw(INTERP_KERNEL::Exception)
{
  int nbComps=getArray()->getNumberOfComponents();
  if(compId<0 || compId>=nbComps)
    {
      std::ostringstream oss; oss << "MEDCouplingFieldDouble::getWeightedAverageValue : Invalid compId specified : No such nb of components ! Should be in [0," << nbComps << ") !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  INTERP_KERNEL::AutoPtr<double> res=new double[nbComps];
  getWeightedAverageValue(res,isWAbs);
  return res[compId];
}

/*!
 * Returns the normL1 of current field on compId component :
 * \f[
 * \frac{\sum_{0 \leq i < nbOfEntity}|val[i]*Vol[i]|}{\sum_{0 \leq i < nbOfEntity}|Vol[i]|}
 * \f]
 * If compId>=nbOfComponent an exception is thrown.
 */
double MEDCouplingFieldDouble::normL1(int compId) const throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("No mesh underlying this field to perform normL1 !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform normL1 !");
  int nbComps=getArray()->getNumberOfComponents();
  if(compId<0 || compId>=nbComps)
    {
      std::ostringstream oss; oss << "MEDCouplingFieldDouble::normL1 : Invalid compId specified : No such nb of components ! Should be in [0," << nbComps << ") !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  INTERP_KERNEL::AutoPtr<double> res=new double[nbComps];
  _type->normL1(_mesh,getArray(),res);
  return res[compId];
}

/*!
 * Returns the normL1 of current field on each components :
 * \f[
 * \frac{\sum_{0 \leq i < nbOfEntity}|val[i]*Vol[i]|}{\sum_{0 \leq i < nbOfEntity}|Vol[i]|}
 * \f]
 * The res is expected to be of size getNumberOfComponents().
 */
void MEDCouplingFieldDouble::normL1(double *res) const throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("No mesh underlying this field to perform normL1");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform normL1 !");
  _type->normL1(_mesh,getArray(),res);
}

/*!
 * Returns the normL2 of current field on compId component :
 * \f[
 * \sqrt{\frac{\sum_{0 \leq i < nbOfEntity}|val[i]^{2}*Vol[i]|}{\sum_{0 \leq i < nbOfEntity}|Vol[i]|}}
 * \f]
 * If compId>=nbOfComponent an exception is thrown.
 */
double MEDCouplingFieldDouble::normL2(int compId) const throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("No mesh underlying this field to perform normL2");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform normL2 !");
  int nbComps=getArray()->getNumberOfComponents();
  if(compId<0 || compId>=nbComps)
    {
      std::ostringstream oss; oss << "MEDCouplingFieldDouble::normL2 : Invalid compId specified : No such nb of components ! Should be in [0," << nbComps << ") !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  INTERP_KERNEL::AutoPtr<double> res=new double[nbComps];
  _type->normL2(_mesh,getArray(),res);
  return res[compId];
}

/*!
 * Returns the normL2 of current field on each components :
 * \f[
 * \sqrt{\frac{\sum_{0 \leq i < nbOfEntity}|val[i]^{2}*Vol[i]|}{\sum_{0 \leq i < nbOfEntity}|Vol[i]|}}
 * \f]
 * The res is expected to be of size getNumberOfComponents().
 */
void MEDCouplingFieldDouble::normL2(double *res) const throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("No mesh underlying this field to perform normL2");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform normL2 !");
  _type->normL2(_mesh,getArray(),res);
}

/*!
 * Returns the accumulation (the sum) of comId_th component of each tuples weigthed by the field
 * returns by getWeightingField relative of the _type of field of default array.
 * This method is useful to check the conservativity of interpolation method.
 */
double MEDCouplingFieldDouble::integral(int compId, bool isWAbs) const throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("No mesh underlying this field to perform integral");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform integral !");
  int nbComps=getArray()->getNumberOfComponents();
  if(compId<0 || compId>=nbComps)
    {
      std::ostringstream oss; oss << "MEDCouplingFieldDouble::integral : Invalid compId specified : No such nb of components ! Should be in [0," << nbComps << ") !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  INTERP_KERNEL::AutoPtr<double> res=new double[nbComps];
  _type->integral(_mesh,getArray(),isWAbs,res);
  return res[compId];
}

/*!
 * Returns the accumulation (the sum) of each tuples weigthed by the field
 * returns by getWeightingField relative of the _type of field of default array.
 * This method is useful to check the conservativity of interpolation method.
 */
void MEDCouplingFieldDouble::integral(bool isWAbs, double *res) const throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("No mesh underlying this field to perform integral2");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform integral2 !");
  _type->integral(_mesh,getArray(),isWAbs,res);
}

/*!
 * This method is reserved for field lying on structured mesh spatial support. It returns the value of cell localized by (i,j,k)
 * If spatial support is not structured mesh an exception will be thrown.
 * @param res out array expected to be equal to size getNumberOfComponents()
 */
void MEDCouplingFieldDouble::getValueOnPos(int i, int j, int k, double *res) const throw(INTERP_KERNEL::Exception)
{
  const DataArrayDouble *arr=_time_discr->getArray();
  if(!_mesh)
    throw INTERP_KERNEL::Exception("No mesh underlying this field to perform getValueOnPos");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform getValueOnPos !");
  _type->getValueOnPos(arr,_mesh,i,j,k,res);
}

/*!
 * Returns value of \a this on default time of point 'spaceLoc' using spatial discretization.
 * If 'point' is outside the spatial discretization of this an exception will be thrown.
 */
void MEDCouplingFieldDouble::getValueOn(const double *spaceLoc, double *res) const throw(INTERP_KERNEL::Exception)
{
  const DataArrayDouble *arr=_time_discr->getArray();
  if(!_mesh)
    throw INTERP_KERNEL::Exception("No mesh underlying this field to perform getValueOn");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform getValueOnPos !");
  _type->getValueOn(arr,_mesh,spaceLoc,res);
}

/*!
 * Returns a newly allocated array with 'nbOfPoints' tuples and nb of components equal to 'this->getNumberOfComponents()'.
 */
DataArrayDouble *MEDCouplingFieldDouble::getValueOnMulti(const double *spaceLoc, int nbOfPoints) const throw(INTERP_KERNEL::Exception)
{
  const DataArrayDouble *arr=_time_discr->getArray();
  if(!_mesh)
    throw INTERP_KERNEL::Exception("No mesh underlying this field to perform getValueOnMulti");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform getValueOnMulti !");
  return _type->getValueOnMulti(arr,_mesh,spaceLoc,nbOfPoints);
}

/*!
 * Returns value of \a this on time 'time' of point 'spaceLoc' using spatial discretization.
 * If 'time' is not covered by this->_time_discr an exception will be thrown.
 * If 'point' is outside the spatial discretization of this an exception will be thrown.
 */
void MEDCouplingFieldDouble::getValueOn(const double *spaceLoc, double time, double *res) const throw(INTERP_KERNEL::Exception)
{
  std::vector< const DataArrayDouble *> arrs=_time_discr->getArraysForTime(time);
  if(!_mesh)
    throw INTERP_KERNEL::Exception("No mesh underlying this field to perform getValueOn");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform getValueOn !");
  std::vector<double> res2;
  for(std::vector< const DataArrayDouble *>::const_iterator iter=arrs.begin();iter!=arrs.end();iter++)
    {
      int sz=(int)res2.size();
      res2.resize(sz+(*iter)->getNumberOfComponents());
      _type->getValueOn(*iter,_mesh,spaceLoc,&res2[sz]);
    }
  _time_discr->getValueForTime(time,res2,res);
}

/*!
 * Applies a*x+b on 'compoId'th component of each cell.
 */
void MEDCouplingFieldDouble::applyLin(double a, double b, int compoId)
{
  _time_discr->applyLin(a,b,compoId);
}

/*!
 * This method sets \a this to a uniform scalar field with one component.
 * All tuples will have the same value 'value'.
 * An exception is thrown if no underlying mesh is defined.
 */
MEDCouplingFieldDouble &MEDCouplingFieldDouble::operator=(double value) throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::operator= : no mesh defined !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform operator = !");
  int nbOfTuple=_type->getNumberOfTuples(_mesh);
  _time_discr->setOrCreateUniformValueOnAllComponents(nbOfTuple,value);
  return *this;
}

/*!
 * This method is very similar to this one MEDCouplingMesh::fillFromAnalytic.
 * See MEDCouplingMesh::fillFromAnalytic method doc to have more details.
 * The main difference is that the field as been started to be constructed here.
 * An exception is thrown if no underlying mesh is set before the call of this method.
 */
void MEDCouplingFieldDouble::fillFromAnalytic(int nbOfComp, FunctionToEvaluate func) throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::fillFromAnalytic : no mesh defined !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform fillFromAnalytic !");
  MEDCouplingAutoRefCountObjectPtr<DataArrayDouble> loc=_type->getLocalizationOfDiscValues(_mesh);
  _time_discr->fillFromAnalytic(loc,nbOfComp,func);
}

/*!
 * This method is very similar to this one MEDCouplingMesh::fillFromAnalytic.
 * See MEDCouplingMesh::fillFromAnalytic method doc to have more details.
 * The main difference is that the field as been started to be constructed here.
 * An exception is thrown if no underlying mesh is set before the call of this method.
 */
void MEDCouplingFieldDouble::fillFromAnalytic(int nbOfComp, const char *func) throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::fillFromAnalytic : no mesh defined !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform fillFromAnalytic !");
  MEDCouplingAutoRefCountObjectPtr<DataArrayDouble> loc=_type->getLocalizationOfDiscValues(_mesh);
  _time_discr->fillFromAnalytic(loc,nbOfComp,func);
}

/*!
 * This method is very similar to this one MEDCouplingMesh::fillFromAnalytic2.
 * See MEDCouplingMesh::fillFromAnalytic method doc to have more details.
 * The main difference is that the field as been started to be constructed here.
 * An exception is throw if no underlying mesh is set before the call of this method.
 */
void MEDCouplingFieldDouble::fillFromAnalytic2(int nbOfComp, const char *func) throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::fillFromAnalytic2 : no mesh defined !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform fillFromAnalytic2 !");
  MEDCouplingAutoRefCountObjectPtr<DataArrayDouble> loc=_type->getLocalizationOfDiscValues(_mesh);
  _time_discr->fillFromAnalytic2(loc,nbOfComp,func);
}

/*!
 * This method is very similar to this one MEDCouplingMesh::fillFromAnalytic3.
 * See MEDCouplingMesh::fillFromAnalytic method doc to have more details.
 * The main difference is that the field as been started to be constructed here.
 * An exception is thrown if no underlying mesh is set before the call of this method.
 */
void MEDCouplingFieldDouble::fillFromAnalytic3(int nbOfComp, const std::vector<std::string>& varsOrder, const char *func) throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::fillFromAnalytic2 : no mesh defined !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform fillFromAnalytic3 !");
  MEDCouplingAutoRefCountObjectPtr<DataArrayDouble> loc=_type->getLocalizationOfDiscValues(_mesh);
  _time_discr->fillFromAnalytic3(loc,nbOfComp,varsOrder,func);
}

/*!
 * Applyies the function specified by pointer 'func' on each tuples on all arrays contained in _time_discr.
 * If '*func' returns false during one evaluation an exception will be thrown.
 */
void MEDCouplingFieldDouble::applyFunc(int nbOfComp, FunctionToEvaluate func)
{
  _time_discr->applyFunc(nbOfComp,func);
}

/*!
 * This method is a specialization of other overloaded methods. When 'nbOfComp' equals 1 this method is equivalent to
 * ParaMEDMEM::MEDCouplingFieldDouble::operator=.
 */
void MEDCouplingFieldDouble::applyFunc(int nbOfComp, double val)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::applyFunc : no mesh defined !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform applyFunc !");
  int nbOfTuple=_type->getNumberOfTuples(_mesh);
  _time_discr->setUniformValue(nbOfTuple,nbOfComp,val);
}

/*!
 * Applyies the function specified by the string repr 'func' on each tuples on all arrays contained in _time_discr.
 * If '*func' fails in evaluation during one evaluation an exception will be thrown.
 * The field will contain 'nbOfComp' components after the call.
 */
void MEDCouplingFieldDouble::applyFunc(int nbOfComp, const char *func) throw(INTERP_KERNEL::Exception)
{
  _time_discr->applyFunc(nbOfComp,func);
}

/*!
 * This method is equivalent to MEDCouplingFieldDouble::applyFunc, except that here components info are used to determine variables position in 'func'.
 * If there is vars detected in 'func' that is not in an info on components an exception will be thrown.
 */
void MEDCouplingFieldDouble::applyFunc2(int nbOfComp, const char *func) throw(INTERP_KERNEL::Exception)
{
  _time_discr->applyFunc2(nbOfComp,func);
}

/*!
 * This method is equivalent to MEDCouplingFieldDouble::applyFunc, except that here 'varsOrder' is used to determine variables position in 'func'.
 * If there is vars detected in 'func' that is not in 'varsOrder' an exception will be thrown.
 */
void MEDCouplingFieldDouble::applyFunc3(int nbOfComp, const std::vector<std::string>& varsOrder, const char *func) throw(INTERP_KERNEL::Exception)
{
  _time_discr->applyFunc3(nbOfComp,varsOrder,func);
}

/*!
 * Applyies the function specified by the string repr 'func' on each tuples on all arrays contained in _time_discr.
 * If '*func' fails in evaluation during one evaluation an exception will be thrown.
 * The field will contain exactly the same number of components after the call.
 */
void MEDCouplingFieldDouble::applyFunc(const char *func) throw(INTERP_KERNEL::Exception)
{
  _time_discr->applyFunc(func);
}

/*!
 * Applyies the function specified by the string repr 'func' on each tuples on all arrays contained in _time_discr.
 * The field will contain exactly the same number of components after the call.
 * Use is not warranted for the moment !
 */
void MEDCouplingFieldDouble::applyFuncFast32(const char *func) throw(INTERP_KERNEL::Exception)
{
  _time_discr->applyFuncFast32(func);
}

/*!
 * Applyies the function specified by the string repr 'func' on each tuples on all arrays contained in _time_discr.
 * The field will contain exactly the same number of components after the call.
 * Use is not warranted for the moment !
 */
void MEDCouplingFieldDouble::applyFuncFast64(const char *func) throw(INTERP_KERNEL::Exception)
{
  _time_discr->applyFuncFast64(func);
}

/*!
 * This method makes the assumption that the default array has been set before.
 * If not an exception will be sent.
 * If default array set, the number of components will be sent.
 */
int MEDCouplingFieldDouble::getNumberOfComponents() const throw(INTERP_KERNEL::Exception)
{
  if(getArray()==0)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::getNumberOfComponents : No array specified !");
  return getArray()->getNumberOfComponents();
}

/*!
 * This method makes the assumption that _mesh has be set before the call of this method and description of gauss
 * localizations in case of Gauss field. If not an exception will sent.
 * \b Contrary to MEDCouplingFieldDouble::getNumberOfComponents and MEDCouplingFieldDouble::getNumberOfValues is
 * \b not aware of the presence of the default array.
 * \b WARNING \b no coherency check is done here. MEDCouplingFieldDouble::checkCoherency method should be called to check that !
 */
int MEDCouplingFieldDouble::getNumberOfTuples() const throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("Impossible to retrieve number of tuples because no mesh specified !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform getNumberOfTuples !");
  return _type->getNumberOfTuples(_mesh);
}

/*!
 * This method makes the assumption that the default array has been set before.
 * If not an exception will be sent.
 * If default array set, the number of values present in the default array will be sent.
 */
int MEDCouplingFieldDouble::getNumberOfValues() const throw(INTERP_KERNEL::Exception)
{
  if(getArray()==0)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::getNumberOfValues : No array specified !");
  return getArray()->getNbOfElems();
}

void MEDCouplingFieldDouble::updateTime() const
{
  MEDCouplingField::updateTime();
  updateTimeWith(*_time_discr);
}

std::size_t MEDCouplingFieldDouble::getHeapMemorySize() const
{
  std::size_t ret=0;
  if(_time_discr)
    ret+=_time_discr->getHeapMemorySize();
  return MEDCouplingField::getHeapMemorySize()+ret;
}

void MEDCouplingFieldDouble::setNature(NatureOfField nat) throw(INTERP_KERNEL::Exception)
{
  MEDCouplingField::setNature(nat);
  if(_type)
    _type->checkCompatibilityWithNature(nat);
}

/*!
 * This method synchronizes time information (time, iteration, order, time unit) regarding the information in \c this->_mesh.
 * \throw If no mesh is set in this. Or if \a this is not compatible with time setting (typically NO_TIME)
 */
void MEDCouplingFieldDouble::synchronizeTimeWithMesh() throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::synchronizeTimeWithMesh : no mesh set in this !");
  int it=-1,ordr=-1;
  double val=_mesh->getTime(it,ordr);
  std::string timeUnit(_mesh->getTimeUnit());
  setTime(val,it,ordr);
  setTimeUnit(timeUnit.c_str());
}

double MEDCouplingFieldDouble::getIJK(int cellId, int nodeIdInCell, int compoId) const
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform getIJK !");
  return _type->getIJK(_mesh,getArray(),cellId,nodeIdInCell,compoId);
}

void MEDCouplingFieldDouble::setArray(DataArrayDouble *array)
{
  _time_discr->setArray(array,this);
}

void MEDCouplingFieldDouble::setEndArray(DataArrayDouble *array)
{
  _time_discr->setEndArray(array,this);
}

void MEDCouplingFieldDouble::setArrays(const std::vector<DataArrayDouble *>& arrs) throw(INTERP_KERNEL::Exception)
{
  _time_discr->setArrays(arrs,this);
}

void MEDCouplingFieldDouble::getTinySerializationStrInformation(std::vector<std::string>& tinyInfo) const
{
  tinyInfo.clear();
  _time_discr->getTinySerializationStrInformation(tinyInfo);
  tinyInfo.push_back(_name);
  tinyInfo.push_back(_desc);
  tinyInfo.push_back(getTimeUnit());
}

/*!
 * This method retrieves some critical values to resize and prepare remote instance.
 * The first two elements returned in tinyInfo correspond to the parameters to give in constructor.
 * @param tinyInfo out parameter resized correctly after the call. The length of this vector is tiny.
 */
void MEDCouplingFieldDouble::getTinySerializationIntInformation(std::vector<int>& tinyInfo) const
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform getTinySerializationIntInformation !");
  tinyInfo.clear();
  tinyInfo.push_back((int)_type->getEnum());
  tinyInfo.push_back((int)_time_discr->getEnum());
  tinyInfo.push_back((int)_nature);
  _time_discr->getTinySerializationIntInformation(tinyInfo);
  std::vector<int> tinyInfo2;
  _type->getTinySerializationIntInformation(tinyInfo2);
  tinyInfo.insert(tinyInfo.end(),tinyInfo2.begin(),tinyInfo2.end());
  tinyInfo.push_back((int)tinyInfo2.size());
}

/*!
 * This method retrieves some critical values to resize and prepare remote instance.
 * @param tinyInfo out parameter resized correctly after the call. The length of this vector is tiny.
 */
void MEDCouplingFieldDouble::getTinySerializationDbleInformation(std::vector<double>& tinyInfo) const
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform getTinySerializationDbleInformation !");
  tinyInfo.clear();
  _time_discr->getTinySerializationDbleInformation(tinyInfo);
  std::vector<double> tinyInfo2;
  _type->getTinySerializationDbleInformation(tinyInfo2);
  tinyInfo.insert(tinyInfo.end(),tinyInfo2.begin(),tinyInfo2.end());
  tinyInfo.push_back((int)tinyInfo2.size());//very bad, lack of time to improve it
}

/*!
 * This method has to be called to the new instance filled by CORBA, MPI, File...
 * @param tinyInfoI is the value retrieves from distant result of getTinySerializationIntInformation on source instance to be copied.
 * @param dataInt out parameter. If not null the pointer is already owned by \a this after the call of this method. In this case no decrRef must be applied.
 * @param arrays out parameter is a vector resized to the right size. The pointers in the vector is already owned by \a this after the call of this method.
 *               No decrRef must be applied to every instances in returned vector.
 */
void MEDCouplingFieldDouble::resizeForUnserialization(const std::vector<int>& tinyInfoI, DataArrayInt *&dataInt, std::vector<DataArrayDouble *>& arrays)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform resizeForUnserialization !");
  dataInt=0;
  std::vector<int> tinyInfoITmp(tinyInfoI);
  int sz=tinyInfoITmp.back();
  tinyInfoITmp.pop_back();
  std::vector<int> tinyInfoITmp2(tinyInfoITmp.begin(),tinyInfoITmp.end()-sz);
  std::vector<int> tinyInfoI2(tinyInfoITmp2.begin()+3,tinyInfoITmp2.end());
  _time_discr->resizeForUnserialization(tinyInfoI2,arrays);
  std::vector<int> tinyInfoITmp3(tinyInfoITmp.end()-sz,tinyInfoITmp.end());
  _type->resizeForUnserialization(tinyInfoITmp3,dataInt);
}

void MEDCouplingFieldDouble::finishUnserialization(const std::vector<int>& tinyInfoI, const std::vector<double>& tinyInfoD, const std::vector<std::string>& tinyInfoS)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform finishUnserialization !");
  std::vector<int> tinyInfoI2(tinyInfoI.begin()+3,tinyInfoI.end());
  //
  std::vector<double> tmp(tinyInfoD);
  int sz=(int)tinyInfoD.back();//very bad, lack of time to improve it
  tmp.pop_back();
  std::vector<double> tmp1(tmp.begin(),tmp.end()-sz);
  std::vector<double> tmp2(tmp.end()-sz,tmp.end());
  //
  _time_discr->finishUnserialization(tinyInfoI2,tmp1,tinyInfoS);
  _nature=(NatureOfField)tinyInfoI[2];
  _type->finishUnserialization(tmp2);
  int nbOfElemS=(int)tinyInfoS.size();
  _name=tinyInfoS[nbOfElemS-3];
  _desc=tinyInfoS[nbOfElemS-2];
  setTimeUnit(tinyInfoS[nbOfElemS-1].c_str());
}

/*!
 * Contrary to MEDCouplingPointSet class the returned arrays are \b not the responsabilities of the caller.
 * The values returned must be consulted only in readonly mode.
 */
void MEDCouplingFieldDouble::serialize(DataArrayInt *&dataInt, std::vector<DataArrayDouble *>& arrays) const
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform serialize !");
  _time_discr->getArrays(arrays);
  _type->getSerializationIntArray(dataInt);
}

/*!
 * This method tries to to change the mesh support of \a this following the parameter 'levOfCheck' and 'precOnMesh'.
 * Semantic of 'levOfCheck' is explained in MEDCouplingMesh::checkGeoEquivalWith method. This method is used to perform the job.
 * If this->_mesh is not defined or other an exeption will be throw.
 */
void MEDCouplingFieldDouble::changeUnderlyingMesh(const MEDCouplingMesh *other, int levOfCheck, double precOnMesh, double eps) throw(INTERP_KERNEL::Exception)
{
  if(_mesh==0 || other==0)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::changeUnderlyingMesh : is expected to operate on not null meshes !");
  DataArrayInt *cellCor=0,*nodeCor=0;
  other->checkGeoEquivalWith(_mesh,levOfCheck,precOnMesh,cellCor,nodeCor);
  MEDCouplingAutoRefCountObjectPtr<DataArrayInt> cellCor2(cellCor),nodeCor2(nodeCor);
  if(cellCor)
    renumberCellsWithoutMesh(cellCor->getConstPointer(),false);
  if(nodeCor)
    renumberNodesWithoutMesh(nodeCor->getConstPointer(),nodeCor->getMaxValueInArray()+1,eps);
  setMesh(const_cast<MEDCouplingMesh *>(other));
}

/*!
 * This method is an extension of MEDCouplingFieldDouble::operator-=. It allows a user to operate a difference of 2 fields (\a this and 'f') even if they do not share same meshes.
 * No interpolation will be done here only an analyze of two underlying mesh will be done to see if the meshes are geometrically equivalent. If yes, the eventual renumbering will be done and operator-= applyed after.
 * This method requires that 'f' and \a this are coherent (check coherency) and that 'f' and \a this would be coherent for a merge.
 * Semantic of 'levOfCheck' is explained in MEDCouplingMesh::checkGeoEquivalWith method.
 * \param [in] precOnMesh precision for the mesh comparison between \c this->getMesh() and \c f->getMesh()
 * \param [in] eps the precision on values that can appear in case of 
 */
void MEDCouplingFieldDouble::substractInPlaceDM(const MEDCouplingFieldDouble *f, int levOfCheck, double precOnMesh, double eps) throw(INTERP_KERNEL::Exception)
{
  checkCoherency();
  if(!f)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::substractInPlaceDM : input field is NULL !");
  f->checkCoherency();
  if(!areCompatibleForMerge(f))
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::substractInPlaceDM : Fields are not compatible ; unable to apply mergeFields on them !");
  changeUnderlyingMesh(f->getMesh(),levOfCheck,precOnMesh,eps);
  operator-=(*f);
}

/*!
 * Merge nodes of underlying mesh. In case of some node will be merged the underlying mesh instance will change.
 * The first 'eps' stands for geometric approximation. The second 'epsOnVals' is for epsilon on values in case of node merging.
 * If 2 nodes distant from less than 'eps' and with value different with more than 'epsOnVals' an exception will be thrown.
 */
bool MEDCouplingFieldDouble::mergeNodes(double eps, double epsOnVals) throw(INTERP_KERNEL::Exception)
{
  const MEDCouplingPointSet *meshC=dynamic_cast<const MEDCouplingPointSet *>(_mesh);
  if(!meshC)
    throw INTERP_KERNEL::Exception("Invalid support mesh to apply mergeNodes on it : must be a MEDCouplingPointSet one !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform mergeNodes !");
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingPointSet> meshC2((MEDCouplingPointSet *)meshC->deepCpy());
  bool ret;
  int ret2;
  MEDCouplingAutoRefCountObjectPtr<DataArrayInt> arr=meshC2->mergeNodes(eps,ret,ret2);
  if(!ret)//no nodes have been merged.
    return ret;
  std::vector<DataArrayDouble *> arrays;
  _time_discr->getArrays(arrays);
  for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++)
    if(*iter)
      _type->renumberValuesOnNodes(epsOnVals,arr->getConstPointer(),meshC2->getNumberOfNodes(),*iter);
  setMesh(meshC2);
  return true;
}

/*!
 * Merge nodes with (barycenter computation) of underlying mesh. In case of some node will be merged the underlying mesh instance will change.
 * The first 'eps' stands for geometric approximation. The second 'epsOnVals' is for epsilon on values in case of node merging.
 * If 2 nodes distant from less than 'eps' and with value different with more than 'epsOnVals' an exception will be thrown.
 */
bool MEDCouplingFieldDouble::mergeNodes2(double eps, double epsOnVals) throw(INTERP_KERNEL::Exception)
{
  const MEDCouplingPointSet *meshC=dynamic_cast<const MEDCouplingPointSet *>(_mesh);
  if(!meshC)
    throw INTERP_KERNEL::Exception("Invalid support mesh to apply mergeNodes on it : must be a MEDCouplingPointSet one !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform mergeNodes2 !");
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingPointSet> meshC2((MEDCouplingPointSet *)meshC->deepCpy());
  bool ret;
  int ret2;
  MEDCouplingAutoRefCountObjectPtr<DataArrayInt> arr=meshC2->mergeNodes2(eps,ret,ret2);
  if(!ret)//no nodes have been merged.
    return ret;
  std::vector<DataArrayDouble *> arrays;
  _time_discr->getArrays(arrays);
  for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++)
    if(*iter)
      _type->renumberValuesOnNodes(epsOnVals,arr->getConstPointer(),meshC2->getNumberOfNodes(),*iter);
  setMesh(meshC2);
  return true;
}

/*!
 * This method applyies ParaMEDMEM::MEDCouplingPointSet::zipCoords method on 'this->_mesh' that should be set and of type ParaMEDMEM::MEDCouplingPointSet.
 * If some nodes have disappeared true is returned.
 * 'epsOnVals' stands for epsilon in case of merge of cells. This value is used as tolerance in case the corresponding values differ.
 */
bool MEDCouplingFieldDouble::zipCoords(double epsOnVals) throw(INTERP_KERNEL::Exception)
{
  const MEDCouplingPointSet *meshC=dynamic_cast<const MEDCouplingPointSet *>(_mesh);
  if(!meshC)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::zipCoords : Invalid support mesh to apply zipCoords on it : must be a MEDCouplingPointSet one !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform zipCoords !");
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingPointSet> meshC2((MEDCouplingPointSet *)meshC->deepCpy());
  int oldNbOfNodes=meshC2->getNumberOfNodes();
  MEDCouplingAutoRefCountObjectPtr<DataArrayInt> arr=meshC2->zipCoordsTraducer();
  if(meshC2->getNumberOfNodes()!=oldNbOfNodes)
    {
      std::vector<DataArrayDouble *> arrays;
      _time_discr->getArrays(arrays);
      for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++)
        if(*iter)
          _type->renumberValuesOnNodes(epsOnVals,arr->getConstPointer(),meshC2->getNumberOfNodes(),*iter);
      setMesh(meshC2);
      return true;
    }
  return false;
}

/*!
 * This method applyies ParaMEDMEM::MEDCouplingUMesh::zipConnectivityTraducer on 'this->_mesh' that should be set and of type ParaMEDMEM::MEDCouplingUMesh.
 * The semantic of 'compType' is given in ParaMEDMEM::MEDCouplingUMesh::zipConnectivityTraducer method.
 * 'epsOnVals' stands for epsilon in case of merge of cells. This value is used as tolerance in case the corresponding values differ.
 */
bool MEDCouplingFieldDouble::zipConnectivity(int compType, double epsOnVals) throw(INTERP_KERNEL::Exception)
{
  const MEDCouplingUMesh *meshC=dynamic_cast<const MEDCouplingUMesh *>(_mesh);
  if(!meshC)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::zipConnectivity : Invalid support mesh to apply zipCoords on it : must be a MEDCouplingPointSet one !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform zipConnectivity !");
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingUMesh> meshC2((MEDCouplingUMesh *)meshC->deepCpy());
  int oldNbOfCells=meshC2->getNumberOfCells();
  MEDCouplingAutoRefCountObjectPtr<DataArrayInt> arr=meshC2->zipConnectivityTraducer(compType);
  if(meshC2->getNumberOfCells()!=oldNbOfCells)
    {
      std::vector<DataArrayDouble *> arrays;
      _time_discr->getArrays(arrays);
      for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++)
        if(*iter)
          _type->renumberValuesOnCells(epsOnVals,meshC,arr->getConstPointer(),meshC2->getNumberOfCells(),*iter);
      setMesh(meshC2);
      return true;
    }
  return false;
}

/*!
 * This method calls MEDCouplingUMesh::buildSlice3D method. So this method makes the assumption that underlying mesh exists.
 * For the moment, this method is implemented for fields on cells.
 * 
 * \return a newly allocated field double containing the result that the user should deallocate.
 */
MEDCouplingFieldDouble *MEDCouplingFieldDouble::extractSlice3D(const double *origin, const double *vec, double eps) const throw(INTERP_KERNEL::Exception)
{
  const MEDCouplingMesh *mesh=getMesh();
  if(!mesh)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::extractSlice3D : underlying mesh is null !");
  if(getTypeOfField()!=ON_CELLS)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::extractSlice3D : only implemented for fields on cells !");
  const MEDCouplingAutoRefCountObjectPtr<MEDCouplingUMesh> umesh(mesh->buildUnstructured());
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=clone(false);
  ret->setMesh(umesh);
  DataArrayInt *cellIds=0;
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingUMesh> mesh2=umesh->buildSlice3D(origin,vec,eps,cellIds);
  MEDCouplingAutoRefCountObjectPtr<DataArrayInt> cellIds2=cellIds;
  ret->setMesh(mesh2);
  MEDCouplingAutoRefCountObjectPtr<DataArrayInt> tupleIds=computeTupleIdsToSelectFromCellIds(cellIds->begin(),cellIds->end());
  std::vector<DataArrayDouble *> arrays;
  _time_discr->getArrays(arrays);
  int i=0;
  std::vector<DataArrayDouble *> newArr(arrays.size());
  std::vector< MEDCouplingAutoRefCountObjectPtr<DataArrayDouble> > newArr2(arrays.size());
  for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++,i++)
    {
      if(*iter)
        {
          newArr2[i]=(*iter)->selectByTupleIdSafe(cellIds->begin(),cellIds->end());
          newArr[i]=newArr2[i];
        }
    }
  ret->setArrays(newArr);
  return ret.retn();
}

/*!
 * This method applyies ParaMEDMEM::MEDCouplingUMesh::simplexize on 'this->_mesh'.
 * The semantic of 'policy' is given in ParaMEDMEM::MEDCouplingUMesh::simplexize method.
 */
bool MEDCouplingFieldDouble::simplexize(int policy) throw(INTERP_KERNEL::Exception)
{
  if(!_mesh)
    throw INTERP_KERNEL::Exception("No underlying mesh on this field to perform simplexize !");
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform simplexize !");
  int oldNbOfCells=_mesh->getNumberOfCells();
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingMesh> meshC2(_mesh->deepCpy());
  MEDCouplingAutoRefCountObjectPtr<DataArrayInt> arr=meshC2->simplexize(policy);
  int newNbOfCells=meshC2->getNumberOfCells();
  if(oldNbOfCells==newNbOfCells)
    return false;
  std::vector<DataArrayDouble *> arrays;
  _time_discr->getArrays(arrays);
  for(std::vector<DataArrayDouble *>::const_iterator iter=arrays.begin();iter!=arrays.end();iter++)
    if(*iter)
      _type->renumberValuesOnCellsR(_mesh,arr->getConstPointer(),arr->getNbOfElems(),*iter);
  setMesh(meshC2);
  return true;
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::doublyContractedProduct() const throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform doublyContractedProduct !");
  MEDCouplingTimeDiscretization *td=_time_discr->doublyContractedProduct();
  td->copyTinyAttrFrom(*_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(getNature(),td,_type->clone());
  ret->setName("DoublyContractedProduct");
  ret->setMesh(getMesh());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::determinant() const throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform determinant !");
  MEDCouplingTimeDiscretization *td=_time_discr->determinant();
  td->copyTinyAttrFrom(*_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(getNature(),td,_type->clone());
  ret->setName("Determinant");
  ret->setMesh(getMesh());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::eigenValues() const throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform eigenValues !");
  MEDCouplingTimeDiscretization *td=_time_discr->eigenValues();
  td->copyTinyAttrFrom(*_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(getNature(),td,_type->clone());
  ret->setName("EigenValues");
  ret->setMesh(getMesh());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::eigenVectors() const throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform eigenVectors !");
  MEDCouplingTimeDiscretization *td=_time_discr->eigenVectors();
  td->copyTinyAttrFrom(*_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(getNature(),td,_type->clone());
  ret->setName("EigenVectors");
  ret->setMesh(getMesh());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::inverse() const throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform inverse !");
  MEDCouplingTimeDiscretization *td=_time_discr->inverse();
  td->copyTinyAttrFrom(*_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(getNature(),td,_type->clone());
  ret->setName("Inversion");
  ret->setMesh(getMesh());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::trace() const throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform trace !");
  MEDCouplingTimeDiscretization *td=_time_discr->trace();
  td->copyTinyAttrFrom(*_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(getNature(),td,_type->clone());
  ret->setName("Trace");
  ret->setMesh(getMesh());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::deviator() const throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform deviator !");
  MEDCouplingTimeDiscretization *td=_time_discr->deviator();
  td->copyTinyAttrFrom(*_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(getNature(),td,_type->clone());
  ret->setName("Deviator");
  ret->setMesh(getMesh());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::magnitude() const throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform magnitude !");
  MEDCouplingTimeDiscretization *td=_time_discr->magnitude();
  td->copyTinyAttrFrom(*_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(getNature(),td,_type->clone());
  ret->setName("Magnitude");
  ret->setMesh(getMesh());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::maxPerTuple() const throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform maxPerTuple !");
  MEDCouplingTimeDiscretization *td=_time_discr->maxPerTuple();
  td->copyTinyAttrFrom(*_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(getNature(),td,_type->clone());
  std::ostringstream oss;
  oss << "Max_" << getName();
  ret->setName(oss.str().c_str());
  ret->setMesh(getMesh());
  return ret.retn();
}

void MEDCouplingFieldDouble::changeNbOfComponents(int newNbOfComp, double dftValue) throw(INTERP_KERNEL::Exception)
{
  _time_discr->changeNbOfComponents(newNbOfComp,dftValue);
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::keepSelectedComponents(const std::vector<int>& compoIds) const throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform keepSelectedComponents !");
  MEDCouplingTimeDiscretization *td=_time_discr->keepSelectedComponents(compoIds);
  td->copyTinyAttrFrom(*_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(getNature(),td,_type->clone());
  ret->setName(getName());
  ret->setMesh(getMesh());
  return ret.retn();
}

void MEDCouplingFieldDouble::setSelectedComponents(const MEDCouplingFieldDouble *f, const std::vector<int>& compoIds) throw(INTERP_KERNEL::Exception)
{
  _time_discr->setSelectedComponents(f->_time_discr,compoIds);
}

void MEDCouplingFieldDouble::sortPerTuple(bool asc) throw(INTERP_KERNEL::Exception)
{
  _time_discr->sortPerTuple(asc);
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::MergeFields(const MEDCouplingFieldDouble *f1, const MEDCouplingFieldDouble *f2) throw(INTERP_KERNEL::Exception)
{
  if(!f1->areCompatibleForMerge(f2))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply MergeFields on them !");
  const MEDCouplingMesh *m1=f1->getMesh();
  const MEDCouplingMesh *m2=f2->getMesh();
  if(!m1)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::MergeFields : no underlying mesh of f1 !");
  if(!f1->_time_discr)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::MergeFields : no time discr of f1 !");
  if(!f1->_type)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::MergeFields : no spatial discr of f1 !");
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingMesh> m=m1->mergeMyselfWith(m2);
  MEDCouplingTimeDiscretization *td=f1->_time_discr->aggregate(f2->_time_discr);
  td->copyTinyAttrFrom(*f1->_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(f1->getNature(),td,f1->_type->clone());
  ret->setMesh(m);
  ret->setName(f1->getName());
  ret->setDescription(f1->getDescription());
  return ret.retn();
}

/*!
 * This method returns a newly created field that is the union of all fields in input array 'a'.
 * This method expects that 'a' is non empty. If not an exception will be thrown.
 * If there is only one field in 'a' a deepCopy (except time information of mesh and field) of the unique field instance in 'a' will be returned.
 * Generally speaking the first instance field in 'a' will be used to assign tiny attributes of returned field.
 */
MEDCouplingFieldDouble *MEDCouplingFieldDouble::MergeFields(const std::vector<const MEDCouplingFieldDouble *>& a) throw(INTERP_KERNEL::Exception)
{
  if(a.size()<1)
    throw INTERP_KERNEL::Exception("FieldDouble::MergeFields : size of array must be >= 1 !");
  std::vector< MEDCouplingAutoRefCountObjectPtr<MEDCouplingUMesh> > ms(a.size());
  std::vector< const MEDCouplingUMesh *> ms2(a.size());
  std::vector< const MEDCouplingTimeDiscretization *> tds(a.size());
  std::vector<const MEDCouplingFieldDouble *>::const_iterator it=a.begin();
  const MEDCouplingFieldDouble *ref=(*it++);
  if(!ref)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::MergeFields : presence of NULL instance in first place of input vector !");
  for(;it!=a.end();it++)
    if(!ref->areCompatibleForMerge(*it))
      throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply MergeFields on them !");
  for(int i=0;i<(int)a.size();i++)
    {
      if(!a[i]->getMesh())
        throw INTERP_KERNEL::Exception("MergeFields : A field as no underlying mesh !");
      ms[i]=a[i]->getMesh()->buildUnstructured();
      ms2[i]=ms[i];
      tds[i]=a[i]->_time_discr;
    }
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingUMesh> m=MEDCouplingUMesh::MergeUMeshes(ms2);
  m->setName(ms2[0]->getName()); m->setDescription(ms2[0]->getDescription());
  MEDCouplingTimeDiscretization *td=tds[0]->aggregate(tds);
  td->copyTinyAttrFrom(*(a[0]->_time_discr));
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(a[0]->getNature(),td,a[0]->_type->clone());
  ret->setMesh(m);
  ret->setName(a[0]->getName());
  ret->setDescription(a[0]->getDescription());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::MeldFields(const MEDCouplingFieldDouble *f1, const MEDCouplingFieldDouble *f2) throw(INTERP_KERNEL::Exception)
{
  if(!f1->areCompatibleForMeld(f2))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply MeldFields on them !");
  MEDCouplingTimeDiscretization *td=f1->_time_discr->meld(f2->_time_discr);
  td->copyTinyAttrFrom(*f1->_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(f1->getNature(),td,f1->_type->clone());
  ret->setMesh(f1->getMesh());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::DotFields(const MEDCouplingFieldDouble *f1, const MEDCouplingFieldDouble *f2) throw(INTERP_KERNEL::Exception)
{
  if(!f1)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::DotFields : input field is NULL !");
  if(!f1->areStrictlyCompatible(f2))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply DotFields on them !");
  MEDCouplingTimeDiscretization *td=f1->_time_discr->dot(f2->_time_discr);
  td->copyTinyAttrFrom(*f1->_time_discr);
  MEDCouplingFieldDouble *ret=new MEDCouplingFieldDouble(f1->getNature(),td,f1->_type->clone());
  ret->setMesh(f1->getMesh());
  return ret;
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::CrossProductFields(const MEDCouplingFieldDouble *f1, const MEDCouplingFieldDouble *f2) throw(INTERP_KERNEL::Exception)
{
  if(!f1)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::CrossProductFields : input field is NULL !");
  if(!f1->areStrictlyCompatible(f2))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply CrossProductFields on them !");
  MEDCouplingTimeDiscretization *td=f1->_time_discr->crossProduct(f2->_time_discr);
  td->copyTinyAttrFrom(*f1->_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(f1->getNature(),td,f1->_type->clone());
  ret->setMesh(f1->getMesh());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::MaxFields(const MEDCouplingFieldDouble *f1, const MEDCouplingFieldDouble *f2) throw(INTERP_KERNEL::Exception)
{
  if(!f1)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::MaxFields : input field is NULL !");
  if(!f1->areStrictlyCompatible(f2))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply MaxFields on them !");
  MEDCouplingTimeDiscretization *td=f1->_time_discr->max(f2->_time_discr);
  td->copyTinyAttrFrom(*f1->_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(f1->getNature(),td,f1->_type->clone());
  ret->setMesh(f1->getMesh());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::MinFields(const MEDCouplingFieldDouble *f1, const MEDCouplingFieldDouble *f2) throw(INTERP_KERNEL::Exception)
{
  if(!f1)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::MinFields : input field is NULL !");
  if(!f1->areStrictlyCompatible(f2))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply MinFields on them !");
  MEDCouplingTimeDiscretization *td=f1->_time_discr->min(f2->_time_discr);
  td->copyTinyAttrFrom(*f1->_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(f1->getNature(),td,f1->_type->clone());
  ret->setMesh(f1->getMesh());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::negate() const throw(INTERP_KERNEL::Exception)
{
  if(!((const MEDCouplingFieldDiscretization *)_type))
    throw INTERP_KERNEL::Exception("No spatial discretization underlying this field to perform negate !");
  MEDCouplingTimeDiscretization *td=_time_discr->negate();
  td->copyTinyAttrFrom(*_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(getNature(),td,_type->clone());
  ret->setMesh(getMesh());
  return ret.retn();
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::AddFields(const MEDCouplingFieldDouble *f1, const MEDCouplingFieldDouble *f2) throw(INTERP_KERNEL::Exception)
{
  if(!f1)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::AddFields : input field is NULL !");
  if(!f1->areStrictlyCompatible(f2))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply AddFields on them !");
  MEDCouplingTimeDiscretization *td=f1->_time_discr->add(f2->_time_discr);
  td->copyTinyAttrFrom(*f1->_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(f1->getNature(),td,f1->_type->clone());
  ret->setMesh(f1->getMesh());
  return ret.retn();
}

const MEDCouplingFieldDouble &MEDCouplingFieldDouble::operator+=(const MEDCouplingFieldDouble& other) throw(INTERP_KERNEL::Exception)
{
  if(!areStrictlyCompatible(&other))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply += on them !");
  _time_discr->addEqual(other._time_discr);
  return *this;
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::SubstractFields(const MEDCouplingFieldDouble *f1, const MEDCouplingFieldDouble *f2) throw(INTERP_KERNEL::Exception)
{
  if(!f1)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::SubstractFields : input field is NULL !");
  if(!f1->areStrictlyCompatible(f2))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply SubstractFields on them !");
  MEDCouplingTimeDiscretization *td=f1->_time_discr->substract(f2->_time_discr);
  td->copyTinyAttrFrom(*f1->_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(f1->getNature(),td,f1->_type->clone());
  ret->setMesh(f1->getMesh());
  return ret.retn();
}

const MEDCouplingFieldDouble &MEDCouplingFieldDouble::operator-=(const MEDCouplingFieldDouble& other) throw(INTERP_KERNEL::Exception)
{
  if(!areStrictlyCompatible(&other))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply -= on them !");
  _time_discr->substractEqual(other._time_discr);
  return *this;
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::MultiplyFields(const MEDCouplingFieldDouble *f1, const MEDCouplingFieldDouble *f2) throw(INTERP_KERNEL::Exception)
{
  if(!f1)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::MultiplyFields : input field is NULL !");
  if(!f1->areCompatibleForMul(f2))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply MultiplyFields on them !");
  MEDCouplingTimeDiscretization *td=f1->_time_discr->multiply(f2->_time_discr);
  td->copyTinyAttrFrom(*f1->_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(f1->getNature(),td,f1->_type->clone());
  ret->setMesh(f1->getMesh());
  return ret.retn();
}

const MEDCouplingFieldDouble &MEDCouplingFieldDouble::operator*=(const MEDCouplingFieldDouble& other) throw(INTERP_KERNEL::Exception)
{
  if(!areCompatibleForMul(&other))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply *= on them !");
  _time_discr->multiplyEqual(other._time_discr);
  return *this;
}

MEDCouplingFieldDouble *MEDCouplingFieldDouble::DivideFields(const MEDCouplingFieldDouble *f1, const MEDCouplingFieldDouble *f2) throw(INTERP_KERNEL::Exception)
{
  if(!f1)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::DivideFields : input field is NULL !");
  if(!f1->areCompatibleForDiv(f2))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply DivideFields on them !");
  MEDCouplingTimeDiscretization *td=f1->_time_discr->divide(f2->_time_discr);
  td->copyTinyAttrFrom(*f1->_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(f1->getNature(),td,f1->_type->clone());
  ret->setMesh(f1->getMesh());
  return ret.retn();
}

const MEDCouplingFieldDouble &MEDCouplingFieldDouble::operator/=(const MEDCouplingFieldDouble& other) throw(INTERP_KERNEL::Exception)
{
  if(!areCompatibleForDiv(&other))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply /= on them !");
  _time_discr->divideEqual(other._time_discr);
  return *this;
}

/*!
 * Directly called by MEDCouplingFieldDouble::operator^.
 * 
 * \sa MEDCouplingFieldDouble::operator^
 */
MEDCouplingFieldDouble *MEDCouplingFieldDouble::PowFields(const MEDCouplingFieldDouble *f1, const MEDCouplingFieldDouble *f2) throw(INTERP_KERNEL::Exception)
{
  if(!f1)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::PowFields : input field is NULL !");
  if(!f1->areCompatibleForMul(f2))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply PowFields on them !");
  MEDCouplingTimeDiscretization *td=f1->_time_discr->pow(f2->_time_discr);
  td->copyTinyAttrFrom(*f1->_time_discr);
  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=new MEDCouplingFieldDouble(f1->getNature(),td,f1->_type->clone());
  ret->setMesh(f1->getMesh());
  return ret.retn();
}

/*!
 * Directly call MEDCouplingFieldDouble::PowFields static method.
 * 
 * \sa MEDCouplingFieldDouble::PowFields
 */
MEDCouplingFieldDouble *MEDCouplingFieldDouble::operator^(const MEDCouplingFieldDouble& other) const throw(INTERP_KERNEL::Exception)
{
  return PowFields(this,&other);
}

const MEDCouplingFieldDouble &MEDCouplingFieldDouble::operator^=(const MEDCouplingFieldDouble& other) throw(INTERP_KERNEL::Exception)
{
  if(!areCompatibleForDiv(&other))
    throw INTERP_KERNEL::Exception("Fields are not compatible ; unable to apply /= on them !");
  _time_discr->powEqual(other._time_discr);
  return *this;
}

/*!
 * This method writes the field series 'fs' in the VTK file 'fileName'.
 * If 'fs' is empty no file is written. If fields lies on more than one mesh an exception will be thrown and no file will be written too.
 * If the single mesh is empty an exception will be thrown.
 * Finally there is a field in 'fs' with no name an exception will be thrown too.
 */
void MEDCouplingFieldDouble::WriteVTK(const char *fileName, const std::vector<const MEDCouplingFieldDouble *>& fs) throw(INTERP_KERNEL::Exception)
{
  if(fs.empty())
    return;
  std::size_t nfs=fs.size();
  if(!fs[0])
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::WriteVTK : 1st instance of field is NULL !");
  const MEDCouplingMesh *m=fs[0]->getMesh();
  if(!m)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::WriteVTK : 1st instance of field lies on NULL mesh !");
  for(std::size_t i=1;i<nfs;i++)
    if(fs[i]->getMesh()!=m)
      throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::WriteVTK : Fields are not lying on a same mesh ! Expected by VTK ! MEDCouplingFieldDouble::setMesh or MEDCouplingFieldDouble::changeUnderlyingMesh can help to that.");
  if(!m)
    throw INTERP_KERNEL::Exception("MEDCouplingFieldDouble::WriteVTK : Fields are lying on a same mesh but it is empty !");
  std::ostringstream coss,noss;
  for(std::size_t i=0;i<nfs;i++)
    {
      const MEDCouplingFieldDouble *cur=fs[i];
      std::string name(cur->getName());
      if(name.empty())
        {
          std::ostringstream oss; oss << "MEDCouplingFieldDouble::WriteVTK : Field in pos #" << i << " has no name !";
          throw INTERP_KERNEL::Exception(oss.str().c_str());
        }
      TypeOfField typ=cur->getTypeOfField();
      if(typ==ON_CELLS)
        cur->getArray()->writeVTK(coss,8,cur->getName());
      else if(typ==ON_NODES)
        cur->getArray()->writeVTK(noss,8,cur->getName());
    }
  m->writeVTKAdvanced(fileName,coss.str(),noss.str());
}

void MEDCouplingFieldDouble::reprQuickOverview(std::ostream& stream) const throw(INTERP_KERNEL::Exception)
{
  stream << "MEDCouplingFieldDouble C++ instance at " << this << ". Name : \"" << _name << "\"." << std::endl;
  const char *nat=0;
  try
    {
      nat=MEDCouplingNatureOfField::GetRepr(_nature);
      stream << "Nature of field : " << nat << ".\n";
    }
  catch(INTERP_KERNEL::Exception& e)
    {  }
  const MEDCouplingFieldDiscretization *fd(_type);
  if(!fd)
    stream << "No spatial discretization set !";
  else
    fd->reprQuickOverview(stream);
  stream << std::endl;
  if(!_mesh)
    stream << "\nNo mesh support defined !";
  else
    {
      std::ostringstream oss;
      _mesh->reprQuickOverview(oss);
      std::string tmp(oss.str());
      stream << "\nMesh info : " << tmp.substr(0,tmp.find('\n'));
    }
  if(_time_discr)
    {
      const DataArrayDouble *arr=_time_discr->getArray();
      if(arr)
        {
          stream << "\n\nArray info : ";
          arr->reprQuickOverview(stream);
        }
      else
        {
          stream << "\n\nNo data array set !";
        }
    }
}