/usr/include/libmesh/tensor_value.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 __tensor_value_h__
#define __tensor_value_h__
// C++ includes
// Local includes
#include "type_tensor.h"
namespace libMesh
{
/**
* This class defines a tensor in LIBMESH_DIM dimensional Real or Complex
* space. The typedef RealTensorValue always defines a real-valued tensor,
* and NumberTensorValue defines a real or complex-valued tensor depending
* on how the library was configured.
*
* \author Roy H. Stogner 2004
*/
template <typename T>
class TensorValue : public TypeTensor<T>
{
public:
/**
* Constructor. By default sets all entries to 0.
*/
TensorValue (const T xx=0.,
const T xy=0.,
const T xz=0.,
const T yx=0.,
const T yy=0.,
const T yz=0.,
const T zx=0.,
const T zy=0.,
const T zz=0.);
/**
* Constructor. Takes 1 row vector for LIBMESH_DIM=1
*/
template <typename T2>
TensorValue (const TypeVector<T2>& vx);
/**
* Constructor. Takes 2 row vectors for LIBMESH_DIM=2
*/
template <typename T2>
TensorValue (const TypeVector<T2>& vx, const TypeVector<T2>& vy);
/**
* Constructor. Takes 3 row vectors for LIBMESH_DIM=3
*/
template <typename T2>
TensorValue (const TypeVector<T2>& vx, const TypeVector<T2>& vy, const TypeVector<T2>& vz);
/**
* Copy-constructor.
*/
template <typename T2>
TensorValue (const TensorValue<T2>& p);
/**
* Copy-constructor.
*/
template <typename T2>
TensorValue (const TypeTensor<T2>& p);
#ifdef LIBMESH_USE_COMPLEX_NUMBERS
/**
* Constructor that takes two \p TypeTensor<Real>
* representing the real and imaginary part as
* arguments.
*/
TensorValue (const TypeTensor<Real>& p_re,
const TypeTensor<Real>& p_im);
#endif
private:
};
/**
* Useful typedefs to allow transparent switching
* between Real and Complex data types.
*/
typedef TensorValue<Real> RealTensorValue;
typedef TensorValue<Number> NumberTensorValue;
typedef RealTensorValue RealTensor;
typedef NumberTensorValue Tensor;
//------------------------------------------------------
// Inline functions
template <typename T>
inline
TensorValue<T>::TensorValue (const T xx,
const T xy,
const T xz,
const T yx,
const T yy,
const T yz,
const T zx,
const T zy,
const T zz) :
TypeTensor<T> (xx,xy,xz,yx,yy,yz,zx,zy,zz)
{
}
template <typename T>
template <typename T2>
inline
TensorValue<T>::TensorValue (const TensorValue<T2>& p) :
TypeTensor<T> (p)
{
}
template <typename T>
template <typename T2>
inline
TensorValue<T>::TensorValue (const TypeVector<T2>& vx) :
TypeTensor<T> (vx)
{
}
template <typename T>
template <typename T2>
inline
TensorValue<T>::TensorValue (const TypeVector<T2>& vx,
const TypeVector<T2>& vy) :
TypeTensor<T> (vx, vy)
{
}
template <typename T>
template <typename T2>
inline
TensorValue<T>::TensorValue (const TypeVector<T2>& vx,
const TypeVector<T2>& vy,
const TypeVector<T2>& vz) :
TypeTensor<T> (vx, vy, vz)
{
}
template <typename T>
template <typename T2>
inline
TensorValue<T>::TensorValue (const TypeTensor<T2>& p) :
TypeTensor<T> (p)
{
}
#ifdef LIBMESH_USE_COMPLEX_NUMBERS
template <typename T>
inline
TensorValue<T>::TensorValue (const TypeTensor<Real>& p_re,
const TypeTensor<Real>& p_im) :
TypeTensor<T> (Complex (p_re(0,0), p_im(0,0)),
Complex (p_re(0,1), p_im(0,1)),
Complex (p_re(0,2), p_im(0,2)),
Complex (p_re(1,0), p_im(1,0)),
Complex (p_re(1,1), p_im(1,1)),
Complex (p_re(1,2), p_im(1,2)),
Complex (p_re(2,0), p_im(2,0)),
Complex (p_re(2,1), p_im(2,1)),
Complex (p_re(2,2), p_im(2,2)))
{
}
#endif
} // namespace libMesh
#endif // #define __tensor_value_h__
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