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// $Id: data_out_rotation.h 18849 2009-05-15 17:59:46Z bangerth $
// Version: $Name$
//
// Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2008, 2009 by the deal.II authors
//
// This file is subject to QPL and may not be distributed
// without copyright and license information. Please refer
// to the file deal.II/doc/license.html for the text and
// further information on this license.
//
//---------------------------------------------------------------------------
#ifndef __deal2__data_out_rotation_h
#define __deal2__data_out_rotation_h
#include <base/config.h>
#include <numerics/data_out.h>
#include <string>
#include <vector>
DEAL_II_NAMESPACE_OPEN
namespace internal
{
namespace DataOutRotation
{
/**
* A derived class for use in the
* DataOutFaces class. This is
* a class for the
* AdditionalData kind of data
* structure discussed in the
* documentation of the
* WorkStream class.
*/
template <int dim, int spacedim>
struct ParallelData : public internal::DataOut::ParallelDataBase<dim,spacedim>
{
template <class FE>
ParallelData (const Quadrature<dim> &quadrature,
const unsigned int n_components,
const unsigned int n_datasets,
const unsigned int n_subdivisions,
const unsigned int n_patches_per_circle,
const std::vector<unsigned int> &n_postprocessor_outputs,
const FE &finite_elements,
const UpdateFlags update_flags);
const unsigned int n_patches_per_circle;
const dealii::hp::QCollection<dim> q_collection;
dealii::hp::FEValues<dim,spacedim> x_fe_values;
};
}
}
/**
* This class generates output in the full domain of computations that
* were done using rotational symmetry of domain and solution. In
* particular, if a computation of a three dimensional problem with
* rotational symmetry around the @p z-axis (i.e. in the
* @p r-z-plane) was done, then this class can be used to generate
* the output in the original @p x-y-z space. In order to do so, it
* generates from each cell in the computational mesh a cell in the
* space with dimension one greater than that of the DoFHandler
* object. The resulting output will then consist of hexahedra forming
* an object that has rotational symmetry around the z-axis. As most
* graphical programs can not represent ring-like structures, the
* angular (rotation) variable is discretized into a finite number of
* intervals as well; the number of these intervals must be given to
* the @p build_patches function. It is noted, however, that while
* this function generates nice pictures of the whole domain, it often
* produces <em>very</em> large output files.
*
*
* <h3>Interface</h3>
*
* The interface of this class is copied from the DataOut
* class. Furthermore, they share the common parent class
* DataOut_DoFData(). See the reference of these two classes for a
* discussion of the interface and how to extend it by deriving
* further classes from this class.
*
*
* <h3>Details for 1d computations</h3>
*
* The one coordinate in the triangulation used by the
* DoFHandler object passed to this class is taken as the radial
* variable, and the output will then be either a circle or a ring
* domain. It is in the user's responsibility to assure that the
* radial coordinate only attains non-negative values.
*
*
* <h3>Details for 2d computations</h3>
*
* We consider the computation (represented by the DoFHandler
* object that is attached to this class) to have happened in the
* @p r-z-plane, where @p r is the radial variable and @p z denotes
* the axis of revolution around which the solution is symmetric. The
* output is in @p x-y-z space, where the radial dependence is
* transformed to the @p x-y plane. At present, it is not possible to
* exchange the meaning of the first and second variable of the plane
* in which the simulation was made, i.e. generate output from a
* simulation where the first variable denoted the symmetry axis, and
* the second denoted the radial variable. You have to take that into
* account when first programming your application.
*
* It is in the responsibility of the user to make sure that the
* radial variable attains only non-negative values.
*
* @ingroup output
* @author Wolfgang Bangerth, 2000
*/
template <int dim, class DH=DoFHandler<dim> >
class DataOutRotation : public DataOut_DoFData<DH,DH::dimension+1>
{
public:
/**
* Typedef to the iterator type
* of the dof handler class under
* consideration.
*/
typedef typename DataOut_DoFData<DH,DH::dimension+1>::cell_iterator cell_iterator;
/**
* This is the central function
* of this class since it builds
* the list of patches to be
* written by the low-level
* functions of the base
* class. See the general
* documentation of this class
* for further information.
*
* In addition to the same
* parameters as found in the
* respective function of the
* DataOut class, the first
* parameter denotes into how
* many intervals the angular
* (rotation) variable is to be
* subdivided.
*
* The function supports
* multithreading, if deal.II is
* compiled in multithreading
* mode. The default number of
* threads to be used to build
* the patches is set to
* <tt>multithread_info.n_default_threads</tt>.
*/
virtual void build_patches (const unsigned int n_patches_per_circle,
const unsigned int n_subdivisions = 0);
/**
* Return the first cell which we
* want output for. The default
* implementation returns the
* first \ref GlossActive "active cell",
* but you might want to
* return other cells in a
* derived class.
*/
virtual cell_iterator first_cell ();
/**
* Return the next cell after @p cell which
* we want output for.
* If there are no more cells,
* <tt>dofs->end()</tt> shall be returned.
*
* The default
* implementation returns the next
* active cell, but you might want
* to return other cells in a derived
* class. Note that the default
* implementation assumes that
* the given @p cell is active, which
* is guaranteed as long as @p first_cell
* is also used from the default
* implementation. Overloading only one
* of the two functions might not be
* a good idea.
*/
virtual cell_iterator next_cell (const cell_iterator &cell);
/**
* Exception
*/
DeclException1 (ExcInvalidNumberOfSubdivisions,
int,
<< "The number of subdivisions per patch, " << arg1
<< ", is not valid.");
/**
* Exception
*/
DeclException1 (ExcRadialVariableHasNegativeValues,
double,
<< "The radial variable attains a negative value of " << arg1);
private:
/**
* Builds every @p n_threads's
* patch. This function may be
* called in parallel.
* If multithreading is not
* used, the function is called
* once and generates all patches.
*/
void
build_one_patch (const cell_iterator *cell,
internal::DataOutRotation::ParallelData<DH::dimension, DH::space_dimension> &data,
std::vector<DataOutBase::Patch<DH::dimension+1,DH::space_dimension+1> > &patches);
};
DEAL_II_NAMESPACE_CLOSE
#endif
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