/usr/include/rheolef/tensor3.h is in librheolef-dev 6.7-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 | # ifndef _RHEOLEF_TENSOR3_H
# define _RHEOLEF_TENSOR3_H
///
/// This file is part of Rheolef.
///
/// Copyright (C) 2000-2009 Pierre Saramito <Pierre.Saramito@imag.fr>
///
/// Rheolef is free software; you can redistribute it and/or modify
/// it under the terms of the GNU General Public License as published by
/// the Free Software Foundation; either version 2 of the License, or
/// (at your option) any later version.
///
/// Rheolef 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 General Public License for more details.
///
/// You should have received a copy of the GNU General Public License
/// along with Rheolef; if not, write to the Free Software
/// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
///
/// =========================================================================
/*Class:tensor3
NAME: @code{tensor3} - a third order tensor
@cindex tensor3
@clindex tensor3
SYNOPSYS:
@noindent
The @code{tensor3} class defines a fourth tensor where
indices varie from zero to 2 (aka 3D physical space).
End:
*/
#include "rheolef/point.h"
#include "rheolef/tensor.h"
namespace rheolef {
//<tensor3:
template<class T>
class tensor3_basic {
public:
typedef size_t size_type;
typedef T element_type;
typedef T float_type;
// allocators:
tensor3_basic (const T& init_val = 0);
tensor3_basic (const tensor3_basic<T>& a);
// affectation:
tensor3_basic<T>& operator= (const tensor3_basic<T>& a);
tensor3_basic<T>& operator= (const T& val);
// accessors:
T& operator()(size_type i, size_type j, size_type k);
const T& operator()(size_type i, size_type j, size_type k) const;
// algebra
tensor3_basic<T>& operator*= (const T& k);
tensor3_basic<T>& operator/= (const T& k) { return operator*= (1./k); }
tensor3_basic<T> operator* (const T& k) const;
tensor3_basic<T> operator/ (const T& k) const;
tensor_basic<T> operator* (const point_basic<T>& v) const;
tensor3_basic<T> operator* (const tensor_basic<T>& b) const;
tensor3_basic<T> operator+ (const tensor3_basic<T>& b) const;
tensor3_basic<T> operator- (const tensor3_basic<T>& b) const;
// inputs/outputs:
std::ostream& put (std::ostream& s, size_type d = 3) const;
std::istream& get (std::istream&);
// data:
protected:
T _x [3][3][3];
};
typedef tensor3_basic<Float> tensor3;
//>tensor3:
// -----------------------------------------------------------------------
// inlined
// -----------------------------------------------------------------------
template<class T> struct float_traits<tensor3_basic<T> > { typedef typename float_traits<T>::type type; };
template<class T> struct scalar_traits<tensor3_basic<T> > { typedef T type; };
template<class T>
inline
tensor3_basic<T>::tensor3_basic (const T& init_val)
{
operator= (init_val);
}
template<class T>
inline
tensor3_basic<T>::tensor3_basic (const tensor3_basic<T>& a)
{
operator= (a);
}
template<class T>
inline
T&
tensor3_basic<T>::operator() (size_type i, size_type j, size_type k)
{
return _x[i%3][j%3][k%3];
}
template<class T>
inline
const T&
tensor3_basic<T>::operator() (size_type i, size_type j, size_type k) const
{
return _x[i%3][j%3][k%3];
}
template <class T>
inline
tensor3_basic<T>
tensor3_basic<T>::operator* (const T& k) const
{
tensor3_basic<T> b = *this;
b *= k;
return b;
}
template <class T, class U>
inline
typename
std::enable_if<
details::is_rheolef_arithmetic<U>::value
,tensor3_basic<T>
>::type
operator* (const U& k, const tensor3_basic<T>& a)
{
return a*k;
}
template <class T>
inline
tensor3_basic<T>
tensor3_basic<T>::operator/ (const T& k) const
{
return operator* (1./k);
}
template <class U>
U dddot (const tensor3_basic<U>&, const tensor3_basic<U>&);
template <class T>
inline
T
norm2 (const tensor3_basic<T>& a)
{
return dddot(a,a);
}
template <class T>
inline
T
dist2 (const tensor3_basic<T>& a, const tensor3_basic<T>& b)
{
return norm2(a-b);
}
template <class U>
inline
U
norm (const tensor3_basic<U>& a)
{
return sqrt(norm2(a));
}
template <class U>
inline
U
dist (const tensor3_basic<U>& a, const tensor3_basic<U>& b)
{
return norm(a-b);
}
// inputs/outputs:
template<class T>
inline
std::istream& operator>> (std::istream& in, tensor3_basic<T>& a)
{
return a.get (in);
}
template<class T>
inline
std::ostream& operator<< (std::ostream& out, const tensor3_basic<T>& a)
{
return a.put (out);
}
}// namespace rheolef
# endif /* _RHEOLEF_TENSOR3_H */
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