[29] | 1 | |
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| 2 | /********************************************************************************************/ |
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| 3 | /* */ |
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| 4 | /* HSO3.hpp header file */ |
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| 5 | /* */ |
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| 6 | /* This file is not currently part of the Boost library. It is simply an example of the use */ |
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| 7 | /* quaternions can be put to. Hopefully it will be useful too. */ |
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| 8 | /* */ |
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| 9 | /* This file provides tools to convert between quaternions and R^3 rotation matrices. */ |
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| 10 | /* */ |
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| 11 | /********************************************************************************************/ |
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| 12 | |
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| 13 | // (C) Copyright Hubert Holin 2001. |
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| 14 | // Distributed under the Boost Software License, Version 1.0. (See |
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| 15 | // accompanying file LICENSE_1_0.txt or copy at |
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| 16 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 17 | |
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| 18 | #ifndef TEST_HSO3_HPP |
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| 19 | #define TEST_HSO3_HPP |
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| 20 | |
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| 21 | #include <algorithm> |
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| 22 | |
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| 23 | #if defined(__GNUC__) && (__GNUC__ < 3) |
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| 24 | #include <boost/limits.hpp> |
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| 25 | #else |
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| 26 | #include <limits> |
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| 27 | #endif |
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| 28 | |
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| 29 | #include <stdexcept> |
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| 30 | #include <string> |
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| 31 | |
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| 32 | #include <boost/math/quaternion.hpp> |
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| 33 | |
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| 34 | |
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| 35 | #if defined(__GNUC__) && (__GNUC__ < 3) |
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| 36 | // gcc 2.x ignores function scope using declarations, put them here instead: |
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| 37 | using namespace ::std; |
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| 38 | using namespace ::boost::math; |
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| 39 | #endif |
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| 40 | |
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| 41 | template<typename TYPE_FLOAT> |
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| 42 | struct R3_matrix |
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| 43 | { |
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| 44 | TYPE_FLOAT a11, a12, a13; |
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| 45 | TYPE_FLOAT a21, a22, a23; |
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| 46 | TYPE_FLOAT a31, a32, a33; |
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| 47 | }; |
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| 48 | |
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| 49 | |
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| 50 | // Note: the input quaternion need not be of norm 1 for the following function |
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| 51 | |
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| 52 | template<typename TYPE_FLOAT> |
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| 53 | R3_matrix<TYPE_FLOAT> quaternion_to_R3_rotation(::boost::math::quaternion<TYPE_FLOAT> const & q) |
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| 54 | { |
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| 55 | using ::std::numeric_limits; |
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| 56 | |
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| 57 | TYPE_FLOAT a = q.R_component_1(); |
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| 58 | TYPE_FLOAT b = q.R_component_2(); |
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| 59 | TYPE_FLOAT c = q.R_component_3(); |
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| 60 | TYPE_FLOAT d = q.R_component_4(); |
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| 61 | |
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| 62 | TYPE_FLOAT aa = a*a; |
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| 63 | TYPE_FLOAT ab = a*b; |
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| 64 | TYPE_FLOAT ac = a*c; |
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| 65 | TYPE_FLOAT ad = a*d; |
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| 66 | TYPE_FLOAT bb = b*b; |
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| 67 | TYPE_FLOAT bc = b*c; |
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| 68 | TYPE_FLOAT bd = b*d; |
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| 69 | TYPE_FLOAT cc = c*c; |
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| 70 | TYPE_FLOAT cd = c*d; |
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| 71 | TYPE_FLOAT dd = d*d; |
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| 72 | |
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| 73 | TYPE_FLOAT norme_carre = aa+bb+cc+dd; |
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| 74 | |
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| 75 | if (norme_carre <= numeric_limits<TYPE_FLOAT>::epsilon()) |
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| 76 | { |
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| 77 | ::std::string error_reporting("Argument to quaternion_to_R3_rotation is too small!"); |
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| 78 | ::std::underflow_error bad_argument(error_reporting); |
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| 79 | |
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| 80 | throw(bad_argument); |
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| 81 | } |
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| 82 | |
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| 83 | R3_matrix<TYPE_FLOAT> out_matrix; |
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| 84 | |
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| 85 | out_matrix.a11 = (aa+bb-cc-dd)/norme_carre; |
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| 86 | out_matrix.a12 = 2*(-ad+bc)/norme_carre; |
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| 87 | out_matrix.a13 = 2*(ac+bd)/norme_carre; |
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| 88 | out_matrix.a21 = 2*(ad+bc)/norme_carre; |
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| 89 | out_matrix.a22 = (aa-bb+cc-dd)/norme_carre; |
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| 90 | out_matrix.a23 = 2*(-ab+cd)/norme_carre; |
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| 91 | out_matrix.a31 = 2*(-ac+bd)/norme_carre; |
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| 92 | out_matrix.a32 = 2*(ab+cd)/norme_carre; |
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| 93 | out_matrix.a33 = (aa-bb-cc+dd)/norme_carre; |
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| 94 | |
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| 95 | return(out_matrix); |
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| 96 | } |
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| 97 | |
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| 98 | |
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| 99 | template<typename TYPE_FLOAT> |
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| 100 | void find_invariant_vector( R3_matrix<TYPE_FLOAT> const & rot, |
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| 101 | TYPE_FLOAT & x, |
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| 102 | TYPE_FLOAT & y, |
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| 103 | TYPE_FLOAT & z) |
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| 104 | { |
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| 105 | using ::std::sqrt; |
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| 106 | |
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| 107 | using ::std::numeric_limits; |
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| 108 | |
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| 109 | TYPE_FLOAT b11 = rot.a11 - static_cast<TYPE_FLOAT>(1); |
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| 110 | TYPE_FLOAT b12 = rot.a12; |
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| 111 | TYPE_FLOAT b13 = rot.a13; |
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| 112 | TYPE_FLOAT b21 = rot.a21; |
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| 113 | TYPE_FLOAT b22 = rot.a22 - static_cast<TYPE_FLOAT>(1); |
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| 114 | TYPE_FLOAT b23 = rot.a23; |
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| 115 | TYPE_FLOAT b31 = rot.a31; |
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| 116 | TYPE_FLOAT b32 = rot.a32; |
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| 117 | TYPE_FLOAT b33 = rot.a33 - static_cast<TYPE_FLOAT>(1); |
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| 118 | |
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| 119 | TYPE_FLOAT minors[9] = |
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| 120 | { |
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| 121 | b11*b22-b12*b21, |
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| 122 | b11*b23-b13*b21, |
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| 123 | b12*b23-b13*b22, |
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| 124 | b11*b32-b12*b31, |
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| 125 | b11*b33-b13*b31, |
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| 126 | b12*b33-b13*b32, |
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| 127 | b21*b32-b22*b31, |
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| 128 | b21*b33-b23*b31, |
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| 129 | b22*b33-b23*b32 |
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| 130 | }; |
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| 131 | |
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| 132 | TYPE_FLOAT * where = ::std::max_element(minors, minors+9); |
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| 133 | |
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| 134 | TYPE_FLOAT det = *where; |
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| 135 | |
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| 136 | if (det <= numeric_limits<TYPE_FLOAT>::epsilon()) |
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| 137 | { |
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| 138 | ::std::string error_reporting("Underflow error in find_invariant_vector!"); |
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| 139 | ::std::underflow_error processing_error(error_reporting); |
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| 140 | |
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| 141 | throw(processing_error); |
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| 142 | } |
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| 143 | |
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| 144 | switch (where-minors) |
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| 145 | { |
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| 146 | case 0: |
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| 147 | |
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| 148 | z = static_cast<TYPE_FLOAT>(1); |
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| 149 | |
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| 150 | x = (-b13*b22+b12*b23)/det; |
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| 151 | y = (-b11*b23+b13*b21)/det; |
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| 152 | |
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| 153 | break; |
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| 154 | |
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| 155 | case 1: |
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| 156 | |
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| 157 | y = static_cast<TYPE_FLOAT>(1); |
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| 158 | |
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| 159 | x = (-b12*b23+b13*b22)/det; |
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| 160 | z = (-b11*b22+b12*b21)/det; |
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| 161 | |
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| 162 | break; |
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| 163 | |
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| 164 | case 2: |
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| 165 | |
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| 166 | x = static_cast<TYPE_FLOAT>(1); |
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| 167 | |
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| 168 | y = (-b11*b23+b13*b21)/det; |
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| 169 | z = (-b12*b21+b11*b22)/det; |
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| 170 | |
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| 171 | break; |
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| 172 | |
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| 173 | case 3: |
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| 174 | |
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| 175 | z = static_cast<TYPE_FLOAT>(1); |
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| 176 | |
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| 177 | x = (-b13*b32+b12*b33)/det; |
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| 178 | y = (-b11*b33+b13*b31)/det; |
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| 179 | |
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| 180 | break; |
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| 181 | |
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| 182 | case 4: |
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| 183 | |
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| 184 | y = static_cast<TYPE_FLOAT>(1); |
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| 185 | |
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| 186 | x = (-b12*b33+b13*b32)/det; |
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| 187 | z = (-b11*b32+b12*b31)/det; |
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| 188 | |
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| 189 | break; |
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| 190 | |
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| 191 | case 5: |
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| 192 | |
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| 193 | x = static_cast<TYPE_FLOAT>(1); |
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| 194 | |
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| 195 | y = (-b11*b33+b13*b31)/det; |
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| 196 | z = (-b12*b31+b11*b32)/det; |
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| 197 | |
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| 198 | break; |
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| 199 | |
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| 200 | case 6: |
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| 201 | |
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| 202 | z = static_cast<TYPE_FLOAT>(1); |
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| 203 | |
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| 204 | x = (-b23*b32+b22*b33)/det; |
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| 205 | y = (-b21*b33+b23*b31)/det; |
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| 206 | |
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| 207 | break; |
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| 208 | |
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| 209 | case 7: |
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| 210 | |
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| 211 | y = static_cast<TYPE_FLOAT>(1); |
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| 212 | |
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| 213 | x = (-b22*b33+b23*b32)/det; |
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| 214 | z = (-b21*b32+b22*b31)/det; |
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| 215 | |
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| 216 | break; |
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| 217 | |
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| 218 | case 8: |
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| 219 | |
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| 220 | x = static_cast<TYPE_FLOAT>(1); |
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| 221 | |
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| 222 | y = (-b21*b33+b23*b31)/det; |
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| 223 | z = (-b22*b31+b21*b32)/det; |
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| 224 | |
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| 225 | break; |
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| 226 | |
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| 227 | default: |
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| 228 | |
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| 229 | ::std::string error_reporting("Impossible condition in find_invariant_vector"); |
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| 230 | ::std::logic_error processing_error(error_reporting); |
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| 231 | |
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| 232 | throw(processing_error); |
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| 233 | |
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| 234 | break; |
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| 235 | } |
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| 236 | |
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| 237 | TYPE_FLOAT vecnorm = sqrt(x*x+y*y+z*z); |
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| 238 | |
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| 239 | if (vecnorm <= numeric_limits<TYPE_FLOAT>::epsilon()) |
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| 240 | { |
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| 241 | ::std::string error_reporting("Overflow error in find_invariant_vector!"); |
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| 242 | ::std::overflow_error processing_error(error_reporting); |
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| 243 | |
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| 244 | throw(processing_error); |
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| 245 | } |
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| 246 | |
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| 247 | x /= vecnorm; |
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| 248 | y /= vecnorm; |
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| 249 | z /= vecnorm; |
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| 250 | } |
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| 251 | |
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| 252 | |
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| 253 | template<typename TYPE_FLOAT> |
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| 254 | void find_orthogonal_vector( TYPE_FLOAT x, |
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| 255 | TYPE_FLOAT y, |
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| 256 | TYPE_FLOAT z, |
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| 257 | TYPE_FLOAT & u, |
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| 258 | TYPE_FLOAT & v, |
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| 259 | TYPE_FLOAT & w) |
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| 260 | { |
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| 261 | using ::std::abs; |
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| 262 | using ::std::sqrt; |
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| 263 | |
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| 264 | using ::std::numeric_limits; |
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| 265 | |
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| 266 | TYPE_FLOAT vecnormsqr = x*x+y*y+z*z; |
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| 267 | |
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| 268 | if (vecnormsqr <= numeric_limits<TYPE_FLOAT>::epsilon()) |
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| 269 | { |
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| 270 | ::std::string error_reporting("Underflow error in find_orthogonal_vector!"); |
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| 271 | ::std::underflow_error processing_error(error_reporting); |
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| 272 | |
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| 273 | throw(processing_error); |
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| 274 | } |
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| 275 | |
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| 276 | TYPE_FLOAT lambda; |
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| 277 | |
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| 278 | TYPE_FLOAT components[3] = |
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| 279 | { |
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| 280 | abs(x), |
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| 281 | abs(y), |
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| 282 | abs(z) |
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| 283 | }; |
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| 284 | |
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| 285 | TYPE_FLOAT * where = ::std::min_element(components, components+3); |
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| 286 | |
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| 287 | switch (where-components) |
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| 288 | { |
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| 289 | case 0: |
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| 290 | |
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| 291 | if (*where <= numeric_limits<TYPE_FLOAT>::epsilon()) |
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| 292 | { |
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| 293 | v = |
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| 294 | w = static_cast<TYPE_FLOAT>(0); |
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| 295 | u = static_cast<TYPE_FLOAT>(1); |
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| 296 | } |
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| 297 | else |
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| 298 | { |
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| 299 | lambda = -x/vecnormsqr; |
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| 300 | |
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| 301 | u = static_cast<TYPE_FLOAT>(1) + lambda*x; |
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| 302 | v = lambda*y; |
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| 303 | w = lambda*z; |
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| 304 | } |
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| 305 | |
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| 306 | break; |
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| 307 | |
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| 308 | case 1: |
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| 309 | |
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| 310 | if (*where <= numeric_limits<TYPE_FLOAT>::epsilon()) |
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| 311 | { |
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| 312 | u = |
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| 313 | w = static_cast<TYPE_FLOAT>(0); |
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| 314 | v = static_cast<TYPE_FLOAT>(1); |
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| 315 | } |
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| 316 | else |
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| 317 | { |
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| 318 | lambda = -y/vecnormsqr; |
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| 319 | |
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| 320 | u = lambda*x; |
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| 321 | v = static_cast<TYPE_FLOAT>(1) + lambda*y; |
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| 322 | w = lambda*z; |
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| 323 | } |
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| 324 | |
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| 325 | break; |
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| 326 | |
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| 327 | case 2: |
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| 328 | |
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| 329 | if (*where <= numeric_limits<TYPE_FLOAT>::epsilon()) |
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| 330 | { |
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| 331 | u = |
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| 332 | v = static_cast<TYPE_FLOAT>(0); |
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| 333 | w = static_cast<TYPE_FLOAT>(1); |
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| 334 | } |
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| 335 | else |
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| 336 | { |
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| 337 | lambda = -z/vecnormsqr; |
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| 338 | |
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| 339 | u = lambda*x; |
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| 340 | v = lambda*y; |
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| 341 | w = static_cast<TYPE_FLOAT>(1) + lambda*z; |
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| 342 | } |
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| 343 | |
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| 344 | break; |
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| 345 | |
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| 346 | default: |
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| 347 | |
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| 348 | ::std::string error_reporting("Impossible condition in find_invariant_vector"); |
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| 349 | ::std::logic_error processing_error(error_reporting); |
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| 350 | |
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| 351 | throw(processing_error); |
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| 352 | |
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| 353 | break; |
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| 354 | } |
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| 355 | |
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| 356 | TYPE_FLOAT vecnorm = sqrt(u*u+v*v+w*w); |
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| 357 | |
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| 358 | if (vecnorm <= numeric_limits<TYPE_FLOAT>::epsilon()) |
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| 359 | { |
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| 360 | ::std::string error_reporting("Underflow error in find_orthogonal_vector!"); |
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| 361 | ::std::underflow_error processing_error(error_reporting); |
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| 362 | |
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| 363 | throw(processing_error); |
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| 364 | } |
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| 365 | |
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| 366 | u /= vecnorm; |
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| 367 | v /= vecnorm; |
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| 368 | w /= vecnorm; |
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| 369 | } |
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| 370 | |
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| 371 | |
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| 372 | // Note: we want [[v, v, w], [r, s, t], [x, y, z]] to be a direct orthogonal basis |
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| 373 | // of R^3. It might not be orthonormal, however, and we do not check if the |
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| 374 | // two input vectors are colinear or not. |
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| 375 | |
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| 376 | template<typename TYPE_FLOAT> |
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| 377 | void find_vector_for_BOD(TYPE_FLOAT x, |
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| 378 | TYPE_FLOAT y, |
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| 379 | TYPE_FLOAT z, |
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| 380 | TYPE_FLOAT u, |
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| 381 | TYPE_FLOAT v, |
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| 382 | TYPE_FLOAT w, |
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| 383 | TYPE_FLOAT & r, |
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| 384 | TYPE_FLOAT & s, |
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| 385 | TYPE_FLOAT & t) |
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| 386 | { |
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| 387 | r = +y*w-z*v; |
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| 388 | s = -x*w+z*u; |
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| 389 | t = +x*v-y*u; |
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| 390 | } |
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| 391 | |
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| 392 | |
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| 393 | |
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| 394 | template<typename TYPE_FLOAT> |
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| 395 | inline bool is_R3_rotation_matrix(R3_matrix<TYPE_FLOAT> const & mat) |
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| 396 | { |
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| 397 | using ::std::abs; |
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| 398 | |
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| 399 | using ::std::numeric_limits; |
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| 400 | |
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| 401 | return ( |
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| 402 | !( |
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| 403 | (abs(mat.a11*mat.a11+mat.a21*mat.a21+mat.a31*mat.a31 - static_cast<TYPE_FLOAT>(1)) > static_cast<TYPE_FLOAT>(10)*numeric_limits<TYPE_FLOAT>::epsilon())|| |
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| 404 | (abs(mat.a11*mat.a12+mat.a21*mat.a22+mat.a31*mat.a32 - static_cast<TYPE_FLOAT>(0)) > static_cast<TYPE_FLOAT>(10)*numeric_limits<TYPE_FLOAT>::epsilon())|| |
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| 405 | (abs(mat.a11*mat.a13+mat.a21*mat.a23+mat.a31*mat.a33 - static_cast<TYPE_FLOAT>(0)) > static_cast<TYPE_FLOAT>(10)*numeric_limits<TYPE_FLOAT>::epsilon())|| |
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| 406 | //(abs(mat.a11*mat.a12+mat.a21*mat.a22+mat.a31*mat.a32 - static_cast<TYPE_FLOAT>(0)) > static_cast<TYPE_FLOAT>(10)*numeric_limits<TYPE_FLOAT>::epsilon())|| |
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| 407 | (abs(mat.a12*mat.a12+mat.a22*mat.a22+mat.a32*mat.a32 - static_cast<TYPE_FLOAT>(1)) > static_cast<TYPE_FLOAT>(10)*numeric_limits<TYPE_FLOAT>::epsilon())|| |
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| 408 | (abs(mat.a12*mat.a13+mat.a22*mat.a23+mat.a32*mat.a33 - static_cast<TYPE_FLOAT>(0)) > static_cast<TYPE_FLOAT>(10)*numeric_limits<TYPE_FLOAT>::epsilon())|| |
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| 409 | //(abs(mat.a11*mat.a13+mat.a21*mat.a23+mat.a31*mat.a33 - static_cast<TYPE_FLOAT>(0)) > static_cast<TYPE_FLOAT>(10)*numeric_limits<TYPE_FLOAT>::epsilon())|| |
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| 410 | //(abs(mat.a12*mat.a13+mat.a22*mat.a23+mat.a32*mat.a33 - static_cast<TYPE_FLOAT>(0)) > static_cast<TYPE_FLOAT>(10)*numeric_limits<TYPE_FLOAT>::epsilon())|| |
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| 411 | (abs(mat.a13*mat.a13+mat.a23*mat.a23+mat.a33*mat.a33 - static_cast<TYPE_FLOAT>(1)) > static_cast<TYPE_FLOAT>(10)*numeric_limits<TYPE_FLOAT>::epsilon()) |
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| 412 | ) |
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| 413 | ); |
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| 414 | } |
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| 415 | |
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| 416 | |
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| 417 | template<typename TYPE_FLOAT> |
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| 418 | ::boost::math::quaternion<TYPE_FLOAT> R3_rotation_to_quaternion( R3_matrix<TYPE_FLOAT> const & rot, |
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| 419 | ::boost::math::quaternion<TYPE_FLOAT> const * hint = 0) |
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| 420 | { |
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| 421 | using ::boost::math::abs; |
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| 422 | |
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| 423 | using ::std::abs; |
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| 424 | using ::std::sqrt; |
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| 425 | |
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| 426 | using ::std::numeric_limits; |
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| 427 | |
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| 428 | if (!is_R3_rotation_matrix(rot)) |
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| 429 | { |
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| 430 | ::std::string error_reporting("Argument to R3_rotation_to_quaternion is not an R^3 rotation matrix!"); |
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| 431 | ::std::range_error bad_argument(error_reporting); |
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| 432 | |
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| 433 | throw(bad_argument); |
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| 434 | } |
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| 435 | |
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| 436 | ::boost::math::quaternion<TYPE_FLOAT> q; |
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| 437 | |
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| 438 | if ( |
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| 439 | (abs(rot.a11 - static_cast<TYPE_FLOAT>(1)) <= numeric_limits<TYPE_FLOAT>::epsilon())&& |
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| 440 | (abs(rot.a22 - static_cast<TYPE_FLOAT>(1)) <= numeric_limits<TYPE_FLOAT>::epsilon())&& |
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| 441 | (abs(rot.a33 - static_cast<TYPE_FLOAT>(1)) <= numeric_limits<TYPE_FLOAT>::epsilon()) |
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| 442 | ) |
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| 443 | { |
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| 444 | q = ::boost::math::quaternion<TYPE_FLOAT>(1); |
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| 445 | } |
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| 446 | else |
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| 447 | { |
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| 448 | TYPE_FLOAT cos_theta = (rot.a11+rot.a22+rot.a33-static_cast<TYPE_FLOAT>(1))/static_cast<TYPE_FLOAT>(2); |
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| 449 | TYPE_FLOAT stuff = (cos_theta+static_cast<TYPE_FLOAT>(1))/static_cast<TYPE_FLOAT>(2); |
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| 450 | TYPE_FLOAT cos_theta_sur_2 = sqrt(stuff); |
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| 451 | TYPE_FLOAT sin_theta_sur_2 = sqrt(1-stuff); |
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| 452 | |
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| 453 | TYPE_FLOAT x; |
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| 454 | TYPE_FLOAT y; |
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| 455 | TYPE_FLOAT z; |
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| 456 | |
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| 457 | find_invariant_vector(rot, x, y, z); |
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| 458 | |
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| 459 | TYPE_FLOAT u; |
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| 460 | TYPE_FLOAT v; |
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| 461 | TYPE_FLOAT w; |
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| 462 | |
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| 463 | find_orthogonal_vector(x, y, z, u, v, w); |
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| 464 | |
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| 465 | TYPE_FLOAT r; |
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| 466 | TYPE_FLOAT s; |
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| 467 | TYPE_FLOAT t; |
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| 468 | |
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| 469 | find_vector_for_BOD(x, y, z, u, v, w, r, s, t); |
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| 470 | |
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| 471 | TYPE_FLOAT ru = rot.a11*u+rot.a12*v+rot.a13*w; |
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| 472 | TYPE_FLOAT rv = rot.a21*u+rot.a22*v+rot.a23*w; |
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| 473 | TYPE_FLOAT rw = rot.a31*u+rot.a32*v+rot.a33*w; |
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| 474 | |
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| 475 | TYPE_FLOAT angle_sign_determinator = r*ru+s*rv+t*rw; |
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| 476 | |
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| 477 | if (angle_sign_determinator > +numeric_limits<TYPE_FLOAT>::epsilon()) |
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| 478 | { |
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| 479 | q = ::boost::math::quaternion<TYPE_FLOAT>(cos_theta_sur_2, +x*sin_theta_sur_2, +y*sin_theta_sur_2, +z*sin_theta_sur_2); |
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| 480 | } |
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| 481 | else if (angle_sign_determinator < -numeric_limits<TYPE_FLOAT>::epsilon()) |
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| 482 | { |
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| 483 | q = ::boost::math::quaternion<TYPE_FLOAT>(cos_theta_sur_2, -x*sin_theta_sur_2, -y*sin_theta_sur_2, -z*sin_theta_sur_2); |
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| 484 | } |
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| 485 | else |
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| 486 | { |
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| 487 | TYPE_FLOAT desambiguator = u*ru+v*rv+w*rw; |
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| 488 | |
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| 489 | if (desambiguator >= static_cast<TYPE_FLOAT>(1)) |
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| 490 | { |
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| 491 | q = ::boost::math::quaternion<TYPE_FLOAT>(0, +x, +y, +z); |
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| 492 | } |
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| 493 | else |
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| 494 | { |
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| 495 | q = ::boost::math::quaternion<TYPE_FLOAT>(0, -x, -y, -z); |
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| 496 | } |
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| 497 | } |
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| 498 | } |
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| 499 | |
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| 500 | if ((hint != 0) && (abs(*hint+q) < abs(*hint-q))) |
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| 501 | { |
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| 502 | return(-q); |
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| 503 | } |
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| 504 | |
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| 505 | return(q); |
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| 506 | } |
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| 507 | |
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| 508 | #endif /* TEST_HSO3_HPP */ |
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| 509 | |
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