/usr/include/deal.II/meshworker/output.h is in libdeal.ii-dev 8.4.2-2+b1.
This file is owned by root:root, with mode 0o644.
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//
// Copyright (C) 2010 - 2015 by the deal.II authors
//
// This file is part of the deal.II library.
//
// The deal.II library is free software; you can use it, redistribute
// it, and/or modify it under the terms of the GNU Lesser General
// Public License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// The full text of the license can be found in the file LICENSE at
// the top level of the deal.II distribution.
//
// ---------------------------------------------------------------------
#ifndef dealii__mesh_worker_output_h
#define dealii__mesh_worker_output_h
#include <deal.II/meshworker/dof_info.h>
#include <deal.II/base/smartpointer.h>
#include <deal.II/base/utilities.h>
#include <deal.II/lac/block_vector.h>
#include <deal.II/base/mg_level_object.h>
DEAL_II_NAMESPACE_OPEN
namespace MeshWorker
{
namespace Assembler
{
/**
* A class that, instead of assembling into a matrix or vector, outputs
* the results on a cell to a gnuplot patch.
*
* This assembler expects that LocalResults contains quadrature values set
* with LocalResults::quadrature_value(). When it is initialized with the
* number of quadrature points in a single (!) space direction and the
* number of data fields to be displayed, it initializes LocalResults
* automatically. The number of data fields in local results will be
* increased by dim in order to accommodate for the coordinates of the
* data points.
*
* While data slots for the space coordinates are allocated automatically,
* these coordinates are not entered. It is up to the user to enter the
* coordinates in the first dim data entries at every point. This adds the
* flexibility to output transformed coordinates or even something
* completely different.
*
* @note In the current implementation, only cell data can be written.
*
* @author Guido Kanschat
* @date 2011, 2012
*/
class GnuplotPatch
{
public:
/**
* Constructor.
*/
GnuplotPatch();
/**
* Initialize for writing <i>n</i> data vectors. The number of points is
* the number of quadrature points in a single direction in a tensor
* product formula. It must match the number in the actual Quadrature
* used to create the patches. The total number of data vectors produced
* is <tt>n+dim</tt> and the first dim should be the space coordinates
* of the points. Nevertheless, it is up to the user to set these values
* to whatever is desired.
*/
void initialize (const unsigned int n_points,
const unsigned int n_vectors);
/**
* Set the stream #os to which data is written. If no stream is selected
* with this function, data goes to @p deallog.
*/
void initialize_stream (std::ostream &stream);
/**
* Initialize the local data in the DoFInfo object used later for
* assembling.
*
* The info object refers to a cell if <code>!face</code>, or else to an
* interior or boundary face.
*/
template <int dim>
void initialize_info(DoFInfo<dim> &info, bool face);
/**
* Write the patch to the output stream.
*/
template<int dim>
void assemble(const DoFInfo<dim> &info);
/**
* @warning Not implemented yet
*/
template<int dim>
void assemble(const DoFInfo<dim> &info1,
const DoFInfo<dim> &info2);
private:
/**
* Write the object T either to the stream #os, if initialize_stream()
* has been called, or to @p deallog if no pointer has been set.
*/
template<typename T>
void write(const T &t) const;
/**
* Write an end-of-line marker either to the stream #os, if
* initialize_stream has been called, or to @p deallog if no pointer has
* been set.
*/
void write_endl () const;
/**
* The number of output components in each point.
*/
unsigned int n_vectors;
/**
* The number of points in one direction.
*/
unsigned int n_points;
/**
* Stream to which output is to be written. Set by initialize_stream().
*/
std::ostream *os;
};
//----------------------------------------------------------------------//
template <typename T>
inline void
GnuplotPatch::write(const T &d) const
{
if (os == 0)
deallog << d;
else
(*os) << d;
}
inline void
GnuplotPatch::write_endl() const
{
if (os == 0)
deallog << std::endl;
else
(*os) << std::endl;
}
inline
GnuplotPatch::GnuplotPatch()
:
os(0)
{}
inline void
GnuplotPatch::initialize (const unsigned int np,
const unsigned int nv)
{
n_vectors = nv;
n_points = np;
}
inline void
GnuplotPatch::initialize_stream (std::ostream &stream)
{
os = &stream;
}
template <int dim>
inline void
GnuplotPatch::initialize_info(DoFInfo<dim> &info, bool face)
{
if (face)
info.initialize_quadrature(Utilities::fixed_power<dim-1>(n_points), n_vectors+dim);
else
info.initialize_quadrature(Utilities::fixed_power<dim>(n_points), n_vectors+dim);
}
template <int dim>
inline void
GnuplotPatch::assemble(const DoFInfo<dim> &info)
{
const unsigned int np = info.n_quadrature_points();
const unsigned int nv = info.n_quadrature_values();
const unsigned int patch_dim = (info.face_number == numbers::invalid_unsigned_int)
? dim : (dim-1);
const unsigned int row_length = n_points;
// If patches are 1D, end the
// patch after a row, else end
// it after a square
const unsigned int row_length2 = (patch_dim==1) ? row_length : (row_length*row_length);
// AssertDimension(np, Utilities::fixed_power<dim>(n_points));
AssertDimension(nv, n_vectors+dim);
for (unsigned int k=0; k<np; ++k)
{
if (k % row_length == 0)
write_endl();
if (k % row_length2 == 0)
write_endl();
for (unsigned int i=0; i<nv; ++i)
{
write(info.quadrature_value(k,i));
write('\t');
}
write_endl();
}
}
template <int dim>
inline void
GnuplotPatch::assemble(const DoFInfo<dim> &info1, const DoFInfo<dim> &info2)
{
assemble(info1);
assemble(info2);
}
}
}
DEAL_II_NAMESPACE_CLOSE
#endif
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