/usr/include/libmesh/fe_compute_data.h is in libmesh-dev 0.7.1-2ubuntu1.
This file is owned by root:root, with mode 0o644.
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// The libMesh Finite Element Library.
// Copyright (C) 2002-2008 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
// 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, or (at your option) any later version.
// 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
#ifndef __fe_compute_data_h__
#define __fe_compute_data_h__
// C++ includes
#include <vector>
// Local includes
#include "libmesh.h"
namespace libMesh
{
// Forward declarations
class EquationSystems;
class Point;
/**
* class \p FEComputeData hides arbitrary data to be passed to and from
* children of \p FEBase through the \p FEInterface::compute_data()
* method. This enables the efficient computation of data on
* the finite element level, while maintaining library integrity.
* -- With special finite elements @e disabled (like infinite elements),
* this class wraps the return values of @e all shape functions
* from \p FEInterface::shape() in a \p std::vector<Number>.
* -- With enabled infinite elements, this class returns a vector of physically
* correct shape functions, both for finite and infinite elements.
*/
class FEComputeData
{
public:
//------------------------------------------------------
// Conventional FEComputeData
/**
* Constructor. Takes the required input data and clears
* the output data using \p clear().
*/
FEComputeData (const EquationSystems& es,
const Point& pin) :
equation_systems(es),
p(pin)
{
this->clear();
}
//----------------------------------------------------
// Input data
/**
* Const reference to the \p EquationSystems object
* that contains simulation-specific data.
*/
const EquationSystems& equation_systems;
/**
* Holds the point where the data are to be computed
*/
const Point& p;
//----------------------------------------------------
// Output data
/**
* Storage for the computed shape function values.
*/
std::vector<Number> shape;
#if defined(LIBMESH_ENABLE_INFINITE_ELEMENTS) && !defined(LIBMESH_USE_COMPLEX_NUMBERS)
/**
* Storage for the computed phase lag
*/
Real phase;
#endif
#ifdef LIBMESH_ENABLE_INFINITE_ELEMENTS
/**
* The wave speed.
*/
Real speed;
#endif
#if defined LIBMESH_ENABLE_INFINITE_ELEMENTS && defined(LIBMESH_USE_COMPLEX_NUMBERS)
/**
* The frequency to evaluate shape functions
* including the wave number depending terms
*/
Real frequency;
#endif
/**
* Clears the @e output data completely.
*/
void clear () ;
/**
* Inits the @e output data to default values, provided
* the fields are correctly resized.
*/
void init () ;
};
} // namespace libMesh
#endif // #ifndef __fe_compute_data_h__
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