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// $Id: data_component_interpretation.h 20602 2010-02-13 17:44:17Z bangerth $
// Version: $Name$
//
// Copyright (C) 2007, 2008 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_component_interpretation_h
#define __deal2__data_component_interpretation_h
#include <base/config.h>
DEAL_II_NAMESPACE_OPEN
/**
* A namespace solely for the declaration of the
* DataComponentInterpretation::DataComponentInterpretation enum.
*/
namespace DataComponentInterpretation
{
/**
* The members of this enum are used to
* describe the logical interpretation of
* what the various components of a
* vector-valued data set mean. For
* example, if one has a finite element
* for the Stokes equations in 2d,
* representing components $(u,v,p)$, one
* would like to indicate that the first
* two, $u$ and $v$, represent a logical
* vector so that later on when we
* generate graphical output we can hand
* them off to a visualization program
* that will automatically know to render
* them as a vector field, rather than as
* two separate and independent scalar
* fields.
*
* By passing a set of enums of the
* current kind to the
* DataOut_DoFData::add_data_vector
* functions, this can be achieved.
*
* See the step-22 tutorial
* program for an example on how this
* information can be used in practice.
*
* @author Wolfgang Bangerth, 2007
*/
enum DataComponentInterpretation
{
/**
* Indicates that a component of a
* data set corresponds to a scalar
* field independent of the others.
*/
component_is_scalar,
/**
* Indicates that a component of a
* data set is part of a
* vector-valued quantity.
*/
component_is_part_of_vector
};
}
DEAL_II_NAMESPACE_CLOSE
#endif
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