+ /*!
+ * Permutes values of \a this field according to a given permutation array for cells
+ * renumbering. The underlying mesh is deeply copied and its cells are also permuted.
+ * The number of cells remains the same; for that the permutation array \a old2NewBg
+ * should not contain equal ids.
+ * ** Warning, this method modifies the mesh aggreagated by \a this (by performing a deep copy ) **.
+ *
+ * \param [in] old2NewBg - the permutation array in "Old to New" mode. Its length is
+ * to be equal to \a this->getMesh()->getNumberOfCells().
+ * \param [in] check - if \c true, \a old2NewBg is transformed to a new permutation
+ * array, so that its maximal cell id to correspond to (be less than) the number
+ * of cells in mesh. This new array is then used for the renumbering. If \a
+ * check == \c false, \a old2NewBg is used as is, that is less secure as validity
+ * of ids in \a old2NewBg is not checked.
+ * \throw If the mesh is not set.
+ * \throw If the spatial discretization of \a this field is NULL.
+ * \throw If \a check == \c true and \a old2NewBg contains equal ids.
+ * \throw If mesh nature does not allow renumbering (e.g. structured mesh).
+ *
+ * \if ENABLE_EXAMPLES
+ * \ref cpp_mcfielddouble_renumberCells "Here is a C++ example".<br>
+ * \ref py_mcfielddouble_renumberCells "Here is a Python example".
+ * \endif
+ */
+ template<class T>
+ void MEDCouplingFieldT<T>::renumberCells(const int *old2NewBg, bool check)
+ {
+ renumberCellsWithoutMesh(old2NewBg,check);
+ MCAuto<MEDCouplingMesh> m(_mesh->deepCopy());
+ m->renumberCells(old2NewBg,check);
+ setMesh(m);
+ updateTime();
+ }
+
+ /*!
+ * Permutes values of \a this field according to a given permutation array for cells
+ * renumbering. The underlying mesh is \b not permuted.
+ * The number of cells remains the same; for that the permutation array \a old2NewBg
+ * should not contain equal ids.
+ * This method performs a part of job of renumberCells(). The reasonable use of this
+ * method is only for multi-field instances lying on the same mesh to avoid a
+ * systematic duplication and renumbering of _mesh attribute.
+ * \warning Use this method with a lot of care!
+ * \param [in] old2NewBg - the permutation array in "Old to New" mode. Its length is
+ * to be equal to \a this->getMesh()->getNumberOfCells().
+ * \param [in] check - if \c true, \a old2NewBg is transformed to a new permutation
+ * array, so that its maximal cell id to correspond to (be less than) the number
+ * of cells in mesh. This new array is then used for the renumbering. If \a
+ * check == \c false, \a old2NewBg is used as is, that is less secure as validity
+ * of ids in \a old2NewBg is not checked.
+ * \throw If the mesh is not set.
+ * \throw If the spatial discretization of \a this field is NULL.
+ * \throw If \a check == \c true and \a old2NewBg contains equal ids.
+ * \throw If mesh nature does not allow renumbering (e.g. structured mesh).
+ */
+ template<class T>
+ void MEDCouplingFieldT<T>::renumberCellsWithoutMesh(const int *old2NewBg, bool check)
+ {
+ if(!_mesh)
+ throw INTERP_KERNEL::Exception("Expecting a defined mesh to be able to operate a renumbering !");
+ if(_type.isNull())
+ throw INTERP_KERNEL::Exception("Expecting a spatial discretization to be able to operate a renumbering !");
+ //
+ _type->renumberCells(old2NewBg,check);
+ std::vector< typename MEDCoupling::Traits<T>::ArrayType *> arrays;
+ timeDiscrSafe()->getArrays(arrays);
+ std::vector<DataArray *> arrays2(arrays.size()); std::copy(arrays.begin(),arrays.end(),arrays2.begin());
+ _type->renumberArraysForCell(_mesh,arrays2,old2NewBg,check);
+ //
+ updateTime();
+ }
+