1 | // This file is part of Eigen, a lightweight C++ template library
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2 | // for linear algebra.
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3 | //
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4 | // Copyright (C) 2009 Gael Guennebaud <gael.guennebaud@inria.fr>
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5 | //
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6 | // This Source Code Form is subject to the terms of the Mozilla
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7 | // Public License v. 2.0. If a copy of the MPL was not distributed
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8 | // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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9 |
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10 | #ifndef EIGEN_AUTODIFF_SCALAR_H
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11 | #define EIGEN_AUTODIFF_SCALAR_H
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12 |
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13 | namespace Eigen {
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14 |
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15 | namespace internal {
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16 |
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17 | template<typename A, typename B>
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18 | struct make_coherent_impl {
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19 | static void run(A&, B&) {}
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20 | };
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21 |
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22 | // resize a to match b is a.size()==0, and conversely.
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23 | template<typename A, typename B>
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24 | void make_coherent(const A& a, const B&b)
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25 | {
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26 | make_coherent_impl<A,B>::run(a.const_cast_derived(), b.const_cast_derived());
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27 | }
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28 |
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29 | template<typename _DerType, bool Enable> struct auto_diff_special_op;
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30 |
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31 | } // end namespace internal
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32 |
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33 | /** \class AutoDiffScalar
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34 | * \brief A scalar type replacement with automatic differentation capability
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35 | *
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36 | * \param _DerType the vector type used to store/represent the derivatives. The base scalar type
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37 | * as well as the number of derivatives to compute are determined from this type.
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38 | * Typical choices include, e.g., \c Vector4f for 4 derivatives, or \c VectorXf
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39 | * if the number of derivatives is not known at compile time, and/or, the number
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40 | * of derivatives is large.
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41 | * Note that _DerType can also be a reference (e.g., \c VectorXf&) to wrap a
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42 | * existing vector into an AutoDiffScalar.
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43 | * Finally, _DerType can also be any Eigen compatible expression.
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44 | *
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45 | * This class represents a scalar value while tracking its respective derivatives using Eigen's expression
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46 | * template mechanism.
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47 | *
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48 | * It supports the following list of global math function:
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49 | * - std::abs, std::sqrt, std::pow, std::exp, std::log, std::sin, std::cos,
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50 | * - internal::abs, internal::sqrt, numext::pow, internal::exp, internal::log, internal::sin, internal::cos,
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51 | * - internal::conj, internal::real, internal::imag, numext::abs2.
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52 | *
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53 | * AutoDiffScalar can be used as the scalar type of an Eigen::Matrix object. However,
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54 | * in that case, the expression template mechanism only occurs at the top Matrix level,
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55 | * while derivatives are computed right away.
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56 | *
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57 | */
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58 |
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59 | template<typename _DerType>
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60 | class AutoDiffScalar
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61 | : public internal::auto_diff_special_op
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62 | <_DerType, !internal::is_same<typename internal::traits<typename internal::remove_all<_DerType>::type>::Scalar,
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63 | typename NumTraits<typename internal::traits<typename internal::remove_all<_DerType>::type>::Scalar>::Real>::value>
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64 | {
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65 | public:
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66 | typedef internal::auto_diff_special_op
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67 | <_DerType, !internal::is_same<typename internal::traits<typename internal::remove_all<_DerType>::type>::Scalar,
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68 | typename NumTraits<typename internal::traits<typename internal::remove_all<_DerType>::type>::Scalar>::Real>::value> Base;
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69 | typedef typename internal::remove_all<_DerType>::type DerType;
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70 | typedef typename internal::traits<DerType>::Scalar Scalar;
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71 | typedef typename NumTraits<Scalar>::Real Real;
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72 |
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73 | using Base::operator+;
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74 | using Base::operator*;
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75 |
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76 | /** Default constructor without any initialization. */
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77 | AutoDiffScalar() {}
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78 |
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79 | /** Constructs an active scalar from its \a value,
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80 | and initializes the \a nbDer derivatives such that it corresponds to the \a derNumber -th variable */
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81 | AutoDiffScalar(const Scalar& value, int nbDer, int derNumber)
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82 | : m_value(value), m_derivatives(DerType::Zero(nbDer))
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83 | {
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84 | m_derivatives.coeffRef(derNumber) = Scalar(1);
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85 | }
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86 |
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87 | /** Conversion from a scalar constant to an active scalar.
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88 | * The derivatives are set to zero. */
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89 | /*explicit*/ AutoDiffScalar(const Real& value)
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90 | : m_value(value)
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91 | {
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92 | if(m_derivatives.size()>0)
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93 | m_derivatives.setZero();
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94 | }
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95 |
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96 | /** Constructs an active scalar from its \a value and derivatives \a der */
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97 | AutoDiffScalar(const Scalar& value, const DerType& der)
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98 | : m_value(value), m_derivatives(der)
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99 | {}
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100 |
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101 | template<typename OtherDerType>
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102 | AutoDiffScalar(const AutoDiffScalar<OtherDerType>& other)
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103 | : m_value(other.value()), m_derivatives(other.derivatives())
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104 | {}
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105 |
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106 | friend std::ostream & operator << (std::ostream & s, const AutoDiffScalar& a)
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107 | {
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108 | return s << a.value();
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109 | }
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110 |
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111 | AutoDiffScalar(const AutoDiffScalar& other)
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112 | : m_value(other.value()), m_derivatives(other.derivatives())
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113 | {}
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114 |
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115 | template<typename OtherDerType>
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116 | inline AutoDiffScalar& operator=(const AutoDiffScalar<OtherDerType>& other)
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117 | {
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118 | m_value = other.value();
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119 | m_derivatives = other.derivatives();
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120 | return *this;
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121 | }
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122 |
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123 | inline AutoDiffScalar& operator=(const AutoDiffScalar& other)
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124 | {
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125 | m_value = other.value();
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126 | m_derivatives = other.derivatives();
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127 | return *this;
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128 | }
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129 |
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130 | // inline operator const Scalar& () const { return m_value; }
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131 | // inline operator Scalar& () { return m_value; }
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132 |
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133 | inline const Scalar& value() const { return m_value; }
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134 | inline Scalar& value() { return m_value; }
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135 |
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136 | inline const DerType& derivatives() const { return m_derivatives; }
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137 | inline DerType& derivatives() { return m_derivatives; }
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138 |
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139 | inline bool operator< (const Scalar& other) const { return m_value < other; }
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140 | inline bool operator<=(const Scalar& other) const { return m_value <= other; }
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141 | inline bool operator> (const Scalar& other) const { return m_value > other; }
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142 | inline bool operator>=(const Scalar& other) const { return m_value >= other; }
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143 | inline bool operator==(const Scalar& other) const { return m_value == other; }
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144 | inline bool operator!=(const Scalar& other) const { return m_value != other; }
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145 |
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146 | friend inline bool operator< (const Scalar& a, const AutoDiffScalar& b) { return a < b.value(); }
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147 | friend inline bool operator<=(const Scalar& a, const AutoDiffScalar& b) { return a <= b.value(); }
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148 | friend inline bool operator> (const Scalar& a, const AutoDiffScalar& b) { return a > b.value(); }
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149 | friend inline bool operator>=(const Scalar& a, const AutoDiffScalar& b) { return a >= b.value(); }
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150 | friend inline bool operator==(const Scalar& a, const AutoDiffScalar& b) { return a == b.value(); }
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151 | friend inline bool operator!=(const Scalar& a, const AutoDiffScalar& b) { return a != b.value(); }
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152 |
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153 | template<typename OtherDerType> inline bool operator< (const AutoDiffScalar<OtherDerType>& b) const { return m_value < b.value(); }
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154 | template<typename OtherDerType> inline bool operator<=(const AutoDiffScalar<OtherDerType>& b) const { return m_value <= b.value(); }
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155 | template<typename OtherDerType> inline bool operator> (const AutoDiffScalar<OtherDerType>& b) const { return m_value > b.value(); }
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156 | template<typename OtherDerType> inline bool operator>=(const AutoDiffScalar<OtherDerType>& b) const { return m_value >= b.value(); }
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157 | template<typename OtherDerType> inline bool operator==(const AutoDiffScalar<OtherDerType>& b) const { return m_value == b.value(); }
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158 | template<typename OtherDerType> inline bool operator!=(const AutoDiffScalar<OtherDerType>& b) const { return m_value != b.value(); }
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159 |
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160 | inline const AutoDiffScalar<DerType&> operator+(const Scalar& other) const
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161 | {
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162 | return AutoDiffScalar<DerType&>(m_value + other, m_derivatives);
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163 | }
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164 |
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165 | friend inline const AutoDiffScalar<DerType&> operator+(const Scalar& a, const AutoDiffScalar& b)
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166 | {
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167 | return AutoDiffScalar<DerType&>(a + b.value(), b.derivatives());
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168 | }
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169 |
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170 | // inline const AutoDiffScalar<DerType&> operator+(const Real& other) const
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171 | // {
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172 | // return AutoDiffScalar<DerType&>(m_value + other, m_derivatives);
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173 | // }
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174 |
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175 | // friend inline const AutoDiffScalar<DerType&> operator+(const Real& a, const AutoDiffScalar& b)
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176 | // {
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177 | // return AutoDiffScalar<DerType&>(a + b.value(), b.derivatives());
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178 | // }
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179 |
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180 | inline AutoDiffScalar& operator+=(const Scalar& other)
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181 | {
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182 | value() += other;
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183 | return *this;
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184 | }
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185 |
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186 | template<typename OtherDerType>
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187 | inline const AutoDiffScalar<CwiseBinaryOp<internal::scalar_sum_op<Scalar>,const DerType,const typename internal::remove_all<OtherDerType>::type> >
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188 | operator+(const AutoDiffScalar<OtherDerType>& other) const
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189 | {
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190 | internal::make_coherent(m_derivatives, other.derivatives());
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191 | return AutoDiffScalar<CwiseBinaryOp<internal::scalar_sum_op<Scalar>,const DerType,const typename internal::remove_all<OtherDerType>::type> >(
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192 | m_value + other.value(),
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193 | m_derivatives + other.derivatives());
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194 | }
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195 |
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196 | template<typename OtherDerType>
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197 | inline AutoDiffScalar&
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198 | operator+=(const AutoDiffScalar<OtherDerType>& other)
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199 | {
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200 | (*this) = (*this) + other;
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201 | return *this;
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202 | }
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203 |
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204 | inline const AutoDiffScalar<DerType&> operator-(const Scalar& b) const
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205 | {
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206 | return AutoDiffScalar<DerType&>(m_value - b, m_derivatives);
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207 | }
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208 |
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209 | friend inline const AutoDiffScalar<CwiseUnaryOp<internal::scalar_opposite_op<Scalar>, const DerType> >
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210 | operator-(const Scalar& a, const AutoDiffScalar& b)
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211 | {
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212 | return AutoDiffScalar<CwiseUnaryOp<internal::scalar_opposite_op<Scalar>, const DerType> >
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213 | (a - b.value(), -b.derivatives());
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214 | }
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215 |
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216 | inline AutoDiffScalar& operator-=(const Scalar& other)
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217 | {
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218 | value() -= other;
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219 | return *this;
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220 | }
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221 |
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222 | template<typename OtherDerType>
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223 | inline const AutoDiffScalar<CwiseBinaryOp<internal::scalar_difference_op<Scalar>, const DerType,const typename internal::remove_all<OtherDerType>::type> >
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224 | operator-(const AutoDiffScalar<OtherDerType>& other) const
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225 | {
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226 | internal::make_coherent(m_derivatives, other.derivatives());
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227 | return AutoDiffScalar<CwiseBinaryOp<internal::scalar_difference_op<Scalar>, const DerType,const typename internal::remove_all<OtherDerType>::type> >(
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228 | m_value - other.value(),
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229 | m_derivatives - other.derivatives());
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230 | }
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231 |
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232 | template<typename OtherDerType>
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233 | inline AutoDiffScalar&
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234 | operator-=(const AutoDiffScalar<OtherDerType>& other)
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235 | {
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236 | *this = *this - other;
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237 | return *this;
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238 | }
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239 |
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240 | inline const AutoDiffScalar<CwiseUnaryOp<internal::scalar_opposite_op<Scalar>, const DerType> >
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241 | operator-() const
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242 | {
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243 | return AutoDiffScalar<CwiseUnaryOp<internal::scalar_opposite_op<Scalar>, const DerType> >(
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244 | -m_value,
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245 | -m_derivatives);
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246 | }
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247 |
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248 | inline const AutoDiffScalar<CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const DerType> >
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249 | operator*(const Scalar& other) const
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250 | {
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251 | return AutoDiffScalar<CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const DerType> >(
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252 | m_value * other,
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253 | (m_derivatives * other));
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254 | }
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255 |
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256 | friend inline const AutoDiffScalar<CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const DerType> >
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257 | operator*(const Scalar& other, const AutoDiffScalar& a)
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258 | {
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259 | return AutoDiffScalar<CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const DerType> >(
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260 | a.value() * other,
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261 | a.derivatives() * other);
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262 | }
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263 |
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264 | // inline const AutoDiffScalar<typename CwiseUnaryOp<internal::scalar_multiple_op<Real>, DerType>::Type >
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265 | // operator*(const Real& other) const
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266 | // {
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267 | // return AutoDiffScalar<typename CwiseUnaryOp<internal::scalar_multiple_op<Real>, DerType>::Type >(
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268 | // m_value * other,
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269 | // (m_derivatives * other));
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270 | // }
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271 | //
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272 | // friend inline const AutoDiffScalar<typename CwiseUnaryOp<internal::scalar_multiple_op<Real>, DerType>::Type >
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273 | // operator*(const Real& other, const AutoDiffScalar& a)
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274 | // {
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275 | // return AutoDiffScalar<typename CwiseUnaryOp<internal::scalar_multiple_op<Real>, DerType>::Type >(
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276 | // a.value() * other,
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277 | // a.derivatives() * other);
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278 | // }
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279 |
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280 | inline const AutoDiffScalar<CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const DerType> >
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281 | operator/(const Scalar& other) const
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282 | {
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283 | return AutoDiffScalar<CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const DerType> >(
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284 | m_value / other,
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285 | (m_derivatives * (Scalar(1)/other)));
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286 | }
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287 |
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288 | friend inline const AutoDiffScalar<CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const DerType> >
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289 | operator/(const Scalar& other, const AutoDiffScalar& a)
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290 | {
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291 | return AutoDiffScalar<CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const DerType> >(
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292 | other / a.value(),
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293 | a.derivatives() * (Scalar(-other) / (a.value()*a.value())));
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294 | }
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295 |
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296 | // inline const AutoDiffScalar<typename CwiseUnaryOp<internal::scalar_multiple_op<Real>, DerType>::Type >
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297 | // operator/(const Real& other) const
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298 | // {
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299 | // return AutoDiffScalar<typename CwiseUnaryOp<internal::scalar_multiple_op<Real>, DerType>::Type >(
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300 | // m_value / other,
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301 | // (m_derivatives * (Real(1)/other)));
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302 | // }
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303 | //
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304 | // friend inline const AutoDiffScalar<typename CwiseUnaryOp<internal::scalar_multiple_op<Real>, DerType>::Type >
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305 | // operator/(const Real& other, const AutoDiffScalar& a)
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306 | // {
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307 | // return AutoDiffScalar<typename CwiseUnaryOp<internal::scalar_multiple_op<Real>, DerType>::Type >(
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308 | // other / a.value(),
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309 | // a.derivatives() * (-Real(1)/other));
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310 | // }
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311 |
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312 | template<typename OtherDerType>
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313 | inline const AutoDiffScalar<CwiseUnaryOp<internal::scalar_multiple_op<Scalar>,
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314 | const CwiseBinaryOp<internal::scalar_difference_op<Scalar>,
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315 | const CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const DerType>,
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316 | const CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const typename internal::remove_all<OtherDerType>::type > > > >
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317 | operator/(const AutoDiffScalar<OtherDerType>& other) const
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318 | {
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319 | internal::make_coherent(m_derivatives, other.derivatives());
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320 | return AutoDiffScalar<CwiseUnaryOp<internal::scalar_multiple_op<Scalar>,
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321 | const CwiseBinaryOp<internal::scalar_difference_op<Scalar>,
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322 | const CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const DerType>,
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323 | const CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const typename internal::remove_all<OtherDerType>::type > > > >(
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324 | m_value / other.value(),
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325 | ((m_derivatives * other.value()) - (m_value * other.derivatives()))
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326 | * (Scalar(1)/(other.value()*other.value())));
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327 | }
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328 |
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329 | template<typename OtherDerType>
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330 | inline const AutoDiffScalar<CwiseBinaryOp<internal::scalar_sum_op<Scalar>,
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331 | const CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const DerType>,
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332 | const CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const typename internal::remove_all<OtherDerType>::type> > >
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333 | operator*(const AutoDiffScalar<OtherDerType>& other) const
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334 | {
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335 | internal::make_coherent(m_derivatives, other.derivatives());
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336 | return AutoDiffScalar<const CwiseBinaryOp<internal::scalar_sum_op<Scalar>,
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337 | const CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const DerType>,
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338 | const CwiseUnaryOp<internal::scalar_multiple_op<Scalar>, const typename internal::remove_all<OtherDerType>::type > > >(
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339 | m_value * other.value(),
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340 | (m_derivatives * other.value()) + (m_value * other.derivatives()));
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341 | }
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342 |
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343 | inline AutoDiffScalar& operator*=(const Scalar& other)
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344 | {
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345 | *this = *this * other;
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346 | return *this;
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347 | }
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348 |
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349 | template<typename OtherDerType>
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350 | inline AutoDiffScalar& operator*=(const AutoDiffScalar<OtherDerType>& other)
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351 | {
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352 | *this = *this * other;
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353 | return *this;
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354 | }
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355 |
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356 | inline AutoDiffScalar& operator/=(const Scalar& other)
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357 | {
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358 | *this = *this / other;
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359 | return *this;
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360 | }
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361 |
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362 | template<typename OtherDerType>
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363 | inline AutoDiffScalar& operator/=(const AutoDiffScalar<OtherDerType>& other)
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364 | {
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365 | *this = *this / other;
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366 | return *this;
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367 | }
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368 |
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369 | protected:
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370 | Scalar m_value;
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371 | DerType m_derivatives;
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372 |
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373 | };
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374 |
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375 | namespace internal {
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376 |
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377 | template<typename _DerType>
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378 | struct auto_diff_special_op<_DerType, true>
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379 | // : auto_diff_scalar_op<_DerType, typename NumTraits<Scalar>::Real,
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380 | // is_same<Scalar,typename NumTraits<Scalar>::Real>::value>
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381 | {
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382 | typedef typename remove_all<_DerType>::type DerType;
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383 | typedef typename traits<DerType>::Scalar Scalar;
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384 | typedef typename NumTraits<Scalar>::Real Real;
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385 |
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386 | // typedef auto_diff_scalar_op<_DerType, typename NumTraits<Scalar>::Real,
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387 | // is_same<Scalar,typename NumTraits<Scalar>::Real>::value> Base;
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388 |
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389 | // using Base::operator+;
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390 | // using Base::operator+=;
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391 | // using Base::operator-;
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392 | // using Base::operator-=;
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393 | // using Base::operator*;
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394 | // using Base::operator*=;
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395 |
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396 | const AutoDiffScalar<_DerType>& derived() const { return *static_cast<const AutoDiffScalar<_DerType>*>(this); }
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397 | AutoDiffScalar<_DerType>& derived() { return *static_cast<AutoDiffScalar<_DerType>*>(this); }
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398 |
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399 |
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400 | inline const AutoDiffScalar<DerType&> operator+(const Real& other) const
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401 | {
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402 | return AutoDiffScalar<DerType&>(derived().value() + other, derived().derivatives());
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403 | }
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404 |
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405 | friend inline const AutoDiffScalar<DerType&> operator+(const Real& a, const AutoDiffScalar<_DerType>& b)
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406 | {
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407 | return AutoDiffScalar<DerType&>(a + b.value(), b.derivatives());
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408 | }
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409 |
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410 | inline AutoDiffScalar<_DerType>& operator+=(const Real& other)
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411 | {
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412 | derived().value() += other;
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413 | return derived();
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414 | }
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415 |
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416 |
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417 | inline const AutoDiffScalar<typename CwiseUnaryOp<scalar_multiple2_op<Scalar,Real>, DerType>::Type >
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418 | operator*(const Real& other) const
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419 | {
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420 | return AutoDiffScalar<typename CwiseUnaryOp<scalar_multiple2_op<Scalar,Real>, DerType>::Type >(
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421 | derived().value() * other,
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422 | derived().derivatives() * other);
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423 | }
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424 |
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425 | friend inline const AutoDiffScalar<typename CwiseUnaryOp<scalar_multiple2_op<Scalar,Real>, DerType>::Type >
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426 | operator*(const Real& other, const AutoDiffScalar<_DerType>& a)
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427 | {
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428 | return AutoDiffScalar<typename CwiseUnaryOp<scalar_multiple2_op<Scalar,Real>, DerType>::Type >(
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429 | a.value() * other,
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430 | a.derivatives() * other);
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431 | }
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432 |
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433 | inline AutoDiffScalar<_DerType>& operator*=(const Scalar& other)
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434 | {
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435 | *this = *this * other;
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436 | return derived();
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437 | }
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438 | };
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439 |
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440 | template<typename _DerType>
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441 | struct auto_diff_special_op<_DerType, false>
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442 | {
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443 | void operator*() const;
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444 | void operator-() const;
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445 | void operator+() const;
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446 | };
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447 |
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448 | template<typename A_Scalar, int A_Rows, int A_Cols, int A_Options, int A_MaxRows, int A_MaxCols, typename B>
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449 | struct make_coherent_impl<Matrix<A_Scalar, A_Rows, A_Cols, A_Options, A_MaxRows, A_MaxCols>, B> {
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450 | typedef Matrix<A_Scalar, A_Rows, A_Cols, A_Options, A_MaxRows, A_MaxCols> A;
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451 | static void run(A& a, B& b) {
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452 | if((A_Rows==Dynamic || A_Cols==Dynamic) && (a.size()==0))
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453 | {
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454 | a.resize(b.size());
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455 | a.setZero();
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456 | }
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457 | }
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458 | };
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459 |
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460 | template<typename A, typename B_Scalar, int B_Rows, int B_Cols, int B_Options, int B_MaxRows, int B_MaxCols>
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461 | struct make_coherent_impl<A, Matrix<B_Scalar, B_Rows, B_Cols, B_Options, B_MaxRows, B_MaxCols> > {
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462 | typedef Matrix<B_Scalar, B_Rows, B_Cols, B_Options, B_MaxRows, B_MaxCols> B;
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463 | static void run(A& a, B& b) {
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464 | if((B_Rows==Dynamic || B_Cols==Dynamic) && (b.size()==0))
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465 | {
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466 | b.resize(a.size());
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467 | b.setZero();
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468 | }
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469 | }
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470 | };
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471 |
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472 | template<typename A_Scalar, int A_Rows, int A_Cols, int A_Options, int A_MaxRows, int A_MaxCols,
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473 | typename B_Scalar, int B_Rows, int B_Cols, int B_Options, int B_MaxRows, int B_MaxCols>
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474 | struct make_coherent_impl<Matrix<A_Scalar, A_Rows, A_Cols, A_Options, A_MaxRows, A_MaxCols>,
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475 | Matrix<B_Scalar, B_Rows, B_Cols, B_Options, B_MaxRows, B_MaxCols> > {
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476 | typedef Matrix<A_Scalar, A_Rows, A_Cols, A_Options, A_MaxRows, A_MaxCols> A;
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477 | typedef Matrix<B_Scalar, B_Rows, B_Cols, B_Options, B_MaxRows, B_MaxCols> B;
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478 | static void run(A& a, B& b) {
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479 | if((A_Rows==Dynamic || A_Cols==Dynamic) && (a.size()==0))
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480 | {
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481 | a.resize(b.size());
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482 | a.setZero();
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483 | }
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484 | else if((B_Rows==Dynamic || B_Cols==Dynamic) && (b.size()==0))
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485 | {
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486 | b.resize(a.size());
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487 | b.setZero();
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488 | }
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489 | }
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490 | };
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491 |
|
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492 | template<typename A_Scalar, int A_Rows, int A_Cols, int A_Options, int A_MaxRows, int A_MaxCols>
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493 | struct scalar_product_traits<Matrix<A_Scalar, A_Rows, A_Cols, A_Options, A_MaxRows, A_MaxCols>,A_Scalar>
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494 | {
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---|
495 | enum { Defined = 1 };
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496 | typedef Matrix<A_Scalar, A_Rows, A_Cols, A_Options, A_MaxRows, A_MaxCols> ReturnType;
|
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497 | };
|
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498 |
|
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499 | template<typename A_Scalar, int A_Rows, int A_Cols, int A_Options, int A_MaxRows, int A_MaxCols>
|
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500 | struct scalar_product_traits<A_Scalar, Matrix<A_Scalar, A_Rows, A_Cols, A_Options, A_MaxRows, A_MaxCols> >
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501 | {
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---|
502 | enum { Defined = 1 };
|
---|
503 | typedef Matrix<A_Scalar, A_Rows, A_Cols, A_Options, A_MaxRows, A_MaxCols> ReturnType;
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504 | };
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505 |
|
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506 | template<typename DerType>
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507 | struct scalar_product_traits<AutoDiffScalar<DerType>,typename DerType::Scalar>
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508 | {
|
---|
509 | enum { Defined = 1 };
|
---|
510 | typedef AutoDiffScalar<DerType> ReturnType;
|
---|
511 | };
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---|
512 |
|
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513 | template<typename DerType>
|
---|
514 | struct scalar_product_traits<typename DerType::Scalar,AutoDiffScalar<DerType> >
|
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515 | {
|
---|
516 | enum { Defined = 1 };
|
---|
517 | typedef AutoDiffScalar<DerType> ReturnType;
|
---|
518 | };
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519 |
|
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520 | } // end namespace internal
|
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521 |
|
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522 | #define EIGEN_AUTODIFF_DECLARE_GLOBAL_UNARY(FUNC,CODE) \
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523 | template<typename DerType> \
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524 | inline const Eigen::AutoDiffScalar<Eigen::CwiseUnaryOp<Eigen::internal::scalar_multiple_op<typename Eigen::internal::traits<typename Eigen::internal::remove_all<DerType>::type>::Scalar>, const typename Eigen::internal::remove_all<DerType>::type> > \
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525 | FUNC(const Eigen::AutoDiffScalar<DerType>& x) { \
|
---|
526 | using namespace Eigen; \
|
---|
527 | typedef typename Eigen::internal::traits<typename Eigen::internal::remove_all<DerType>::type>::Scalar Scalar; \
|
---|
528 | typedef AutoDiffScalar<CwiseUnaryOp<Eigen::internal::scalar_multiple_op<Scalar>, const typename Eigen::internal::remove_all<DerType>::type> > ReturnType; \
|
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529 | CODE; \
|
---|
530 | }
|
---|
531 |
|
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532 | template<typename DerType>
|
---|
533 | inline const AutoDiffScalar<DerType>& conj(const AutoDiffScalar<DerType>& x) { return x; }
|
---|
534 | template<typename DerType>
|
---|
535 | inline const AutoDiffScalar<DerType>& real(const AutoDiffScalar<DerType>& x) { return x; }
|
---|
536 | template<typename DerType>
|
---|
537 | inline typename DerType::Scalar imag(const AutoDiffScalar<DerType>&) { return 0.; }
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---|
538 | template<typename DerType, typename T>
|
---|
539 | inline AutoDiffScalar<DerType> (min)(const AutoDiffScalar<DerType>& x, const T& y) { return (x <= y ? x : y); }
|
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540 | template<typename DerType, typename T>
|
---|
541 | inline AutoDiffScalar<DerType> (max)(const AutoDiffScalar<DerType>& x, const T& y) { return (x >= y ? x : y); }
|
---|
542 | template<typename DerType, typename T>
|
---|
543 | inline AutoDiffScalar<DerType> (min)(const T& x, const AutoDiffScalar<DerType>& y) { return (x < y ? x : y); }
|
---|
544 | template<typename DerType, typename T>
|
---|
545 | inline AutoDiffScalar<DerType> (max)(const T& x, const AutoDiffScalar<DerType>& y) { return (x > y ? x : y); }
|
---|
546 |
|
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547 | EIGEN_AUTODIFF_DECLARE_GLOBAL_UNARY(abs,
|
---|
548 | using std::abs;
|
---|
549 | return ReturnType(abs(x.value()), x.derivatives() * (x.value()<0 ? -1 : 1) );)
|
---|
550 |
|
---|
551 | EIGEN_AUTODIFF_DECLARE_GLOBAL_UNARY(abs2,
|
---|
552 | using numext::abs2;
|
---|
553 | return ReturnType(abs2(x.value()), x.derivatives() * (Scalar(2)*x.value()));)
|
---|
554 |
|
---|
555 | EIGEN_AUTODIFF_DECLARE_GLOBAL_UNARY(sqrt,
|
---|
556 | using std::sqrt;
|
---|
557 | Scalar sqrtx = sqrt(x.value());
|
---|
558 | return ReturnType(sqrtx,x.derivatives() * (Scalar(0.5) / sqrtx));)
|
---|
559 |
|
---|
560 | EIGEN_AUTODIFF_DECLARE_GLOBAL_UNARY(cos,
|
---|
561 | using std::cos;
|
---|
562 | using std::sin;
|
---|
563 | return ReturnType(cos(x.value()), x.derivatives() * (-sin(x.value())));)
|
---|
564 |
|
---|
565 | EIGEN_AUTODIFF_DECLARE_GLOBAL_UNARY(sin,
|
---|
566 | using std::sin;
|
---|
567 | using std::cos;
|
---|
568 | return ReturnType(sin(x.value()),x.derivatives() * cos(x.value()));)
|
---|
569 |
|
---|
570 | EIGEN_AUTODIFF_DECLARE_GLOBAL_UNARY(exp,
|
---|
571 | using std::exp;
|
---|
572 | Scalar expx = exp(x.value());
|
---|
573 | return ReturnType(expx,x.derivatives() * expx);)
|
---|
574 |
|
---|
575 | EIGEN_AUTODIFF_DECLARE_GLOBAL_UNARY(log,
|
---|
576 | using std::log;
|
---|
577 | return ReturnType(log(x.value()),x.derivatives() * (Scalar(1)/x.value()));)
|
---|
578 |
|
---|
579 | template<typename DerType>
|
---|
580 | inline const Eigen::AutoDiffScalar<Eigen::CwiseUnaryOp<Eigen::internal::scalar_multiple_op<typename Eigen::internal::traits<DerType>::Scalar>, const DerType> >
|
---|
581 | pow(const Eigen::AutoDiffScalar<DerType>& x, typename Eigen::internal::traits<DerType>::Scalar y)
|
---|
582 | {
|
---|
583 | using namespace Eigen;
|
---|
584 | typedef typename Eigen::internal::traits<DerType>::Scalar Scalar;
|
---|
585 | return AutoDiffScalar<CwiseUnaryOp<Eigen::internal::scalar_multiple_op<Scalar>, const DerType> >(
|
---|
586 | std::pow(x.value(),y),
|
---|
587 | x.derivatives() * (y * std::pow(x.value(),y-1)));
|
---|
588 | }
|
---|
589 |
|
---|
590 |
|
---|
591 | template<typename DerTypeA,typename DerTypeB>
|
---|
592 | inline const AutoDiffScalar<Matrix<typename internal::traits<DerTypeA>::Scalar,Dynamic,1> >
|
---|
593 | atan2(const AutoDiffScalar<DerTypeA>& a, const AutoDiffScalar<DerTypeB>& b)
|
---|
594 | {
|
---|
595 | using std::atan2;
|
---|
596 | using std::max;
|
---|
597 | typedef typename internal::traits<DerTypeA>::Scalar Scalar;
|
---|
598 | typedef AutoDiffScalar<Matrix<Scalar,Dynamic,1> > PlainADS;
|
---|
599 | PlainADS ret;
|
---|
600 | ret.value() = atan2(a.value(), b.value());
|
---|
601 |
|
---|
602 | Scalar tmp2 = a.value() * a.value();
|
---|
603 | Scalar tmp3 = b.value() * b.value();
|
---|
604 | Scalar tmp4 = tmp3/(tmp2+tmp3);
|
---|
605 |
|
---|
606 | if (tmp4!=0)
|
---|
607 | ret.derivatives() = (a.derivatives() * b.value() - a.value() * b.derivatives()) * (tmp2+tmp3);
|
---|
608 |
|
---|
609 | return ret;
|
---|
610 | }
|
---|
611 |
|
---|
612 | EIGEN_AUTODIFF_DECLARE_GLOBAL_UNARY(tan,
|
---|
613 | using std::tan;
|
---|
614 | using std::cos;
|
---|
615 | return ReturnType(tan(x.value()),x.derivatives() * (Scalar(1)/numext::abs2(cos(x.value()))));)
|
---|
616 |
|
---|
617 | EIGEN_AUTODIFF_DECLARE_GLOBAL_UNARY(asin,
|
---|
618 | using std::sqrt;
|
---|
619 | using std::asin;
|
---|
620 | return ReturnType(asin(x.value()),x.derivatives() * (Scalar(1)/sqrt(1-numext::abs2(x.value()))));)
|
---|
621 |
|
---|
622 | EIGEN_AUTODIFF_DECLARE_GLOBAL_UNARY(acos,
|
---|
623 | using std::sqrt;
|
---|
624 | using std::acos;
|
---|
625 | return ReturnType(acos(x.value()),x.derivatives() * (Scalar(-1)/sqrt(1-numext::abs2(x.value()))));)
|
---|
626 |
|
---|
627 | #undef EIGEN_AUTODIFF_DECLARE_GLOBAL_UNARY
|
---|
628 |
|
---|
629 | template<typename DerType> struct NumTraits<AutoDiffScalar<DerType> >
|
---|
630 | : NumTraits< typename NumTraits<typename DerType::Scalar>::Real >
|
---|
631 | {
|
---|
632 | typedef AutoDiffScalar<Matrix<typename NumTraits<typename DerType::Scalar>::Real,DerType::RowsAtCompileTime,DerType::ColsAtCompileTime> > Real;
|
---|
633 | typedef AutoDiffScalar<DerType> NonInteger;
|
---|
634 | typedef AutoDiffScalar<DerType> Nested;
|
---|
635 | enum{
|
---|
636 | RequireInitialization = 1
|
---|
637 | };
|
---|
638 | };
|
---|
639 |
|
---|
640 | }
|
---|
641 |
|
---|
642 | #endif // EIGEN_AUTODIFF_SCALAR_H
|
---|