1 | /*
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2 | * Project: MoleCuilder
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3 | * Description: creates and alters molecular systems
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4 | * Copyright (C) 2017 Frederik Heber. All rights reserved.
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5 | *
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6 | *
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7 | * This file is part of MoleCuilder.
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8 | *
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9 | * MoleCuilder is free software: you can redistribute it and/or modify
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10 | * it under the terms of the GNU General Public License as published by
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11 | * the Free Software Foundation, either version 2 of the License, or
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12 | * (at your option) any later version.
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13 | *
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14 | * MoleCuilder is distributed in the hope that it will be useful,
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 | * GNU General Public License for more details.
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18 | *
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19 | * You should have received a copy of the GNU General Public License
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20 | * along with MoleCuilder. If not, see <http://www.gnu.org/licenses/>.
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21 | */
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22 |
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23 | /*
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24 | * BondVectors.cpp
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25 | *
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26 | * Created on: Jun 13, 2017
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27 | * Author: heber
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28 | */
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29 |
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30 |
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31 | // include config.h
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32 | #ifdef HAVE_CONFIG_H
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33 | #include <config.h>
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34 | #endif
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35 |
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36 | //#include "CodePatterns/MemDebug.hpp"
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37 |
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38 | #include "BondVectors.hpp"
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39 |
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40 | #include <algorithm>
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41 | #include <functional>
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42 | #include <iterator>
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43 | #include <numeric>
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44 |
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45 | #include "CodePatterns/Assert.hpp"
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46 | #include "CodePatterns/Log.hpp"
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47 |
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48 | #include "Atom/atom.hpp"
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49 | #include "Bond/bond.hpp"
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50 | #include "Helpers/defs.hpp"
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51 |
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52 | void BondVectors::recalculateBondVectorsAtStep(
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53 | const size_t &_step) const
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54 | {
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55 | current_mapped_vectors.clear();
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56 |
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57 | ASSERT( !container.empty(),
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58 | "BondVectors::getBondVectors() - container empty, not set properly?");
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59 | for (container_t::const_iterator iter = container.begin();
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60 | iter != container.end(); ++iter) {
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61 | const bond::ptr ¤t_bond = *iter;
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62 | Vector BondVector = current_bond->leftatom->getPositionAtStep(_step)
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63 | - current_bond->rightatom->getPositionAtStep(_step);
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64 | BondVector.Normalize();
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65 | current_mapped_vectors.insert( std::make_pair(current_bond, BondVector) );
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66 | }
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67 | ASSERT( current_mapped_vectors.size() == container.size(),
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68 | "BondVectors::getBondVectors() - not same amount of bond vectors as bonds?");
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69 |
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70 | map_is_dirty = false;
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71 | current_step_for_map = _step;
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72 | }
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73 |
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74 | size_t BondVectors::getIndexForBond(const bond::ptr &_bond) const
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75 | {
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76 | std::pair<
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77 | container_t::const_iterator,
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78 | container_t::const_iterator> iters =
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79 | std::equal_range(container.begin(), container.end(), _bond);
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80 | if (iters.first != container.end())
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81 | return std::distance(container.begin(), iters.first);
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82 | else
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83 | return (size_t)-1;
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84 | }
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85 |
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86 | std::vector<Vector> BondVectors::getAtomsBondVectorsAtStep(
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87 | const atom &_walker,
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88 | const size_t &_step) const
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89 | {
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90 | if (map_is_dirty || (current_step_for_map != _step))
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91 | recalculateBondVectorsAtStep(_step);
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92 |
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93 | std::vector<Vector> BondVectors;
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94 | // gather subset of BondVectors for the current atom
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95 | const BondList& ListOfBonds = _walker.getListOfBonds();
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96 | for(BondList::const_iterator bonditer = ListOfBonds.begin();
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97 | bonditer != ListOfBonds.end(); ++bonditer) {
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98 | const bond::ptr ¤t_bond = *bonditer;
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99 | const BondVectors::mapped_t::const_iterator bviter =
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100 | current_mapped_vectors.find(current_bond);
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101 | ASSERT( bviter != current_mapped_vectors.end(),
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102 | "ForceAnnealing() - cannot find current_bond ?");
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103 | ASSERT( bviter != current_mapped_vectors.end(),
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104 | "ForceAnnealing - cannot find current bond "+toString(*current_bond)
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105 | +" in bonds.");
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106 | BondVectors.push_back(bviter->second);
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107 | }
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108 | LOG(4, "DEBUG: BondVectors for atom #" << _walker.getId() << ": " << BondVectors);
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109 |
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110 | return BondVectors;
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111 | }
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112 |
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113 | BondVectors::weights_t BondVectors::getWeightsForAtomAtStep(
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114 | const atom &_walker,
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115 | const size_t &_step) const
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116 | {
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117 | const std::vector<Vector> BondVectors =
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118 | getAtomsBondVectorsAtStep(_walker, _step);
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119 |
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120 | weights_t weights;
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121 | for (std::vector<Vector>::const_iterator iter = BondVectors.begin();
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122 | iter != BondVectors.end(); ++iter) {
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123 | std::vector<double> scps;
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124 | scps.reserve(BondVectors.size());
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125 | std::transform(
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126 | BondVectors.begin(), BondVectors.end(),
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127 | std::back_inserter(scps),
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128 | boost::bind(static_cast< double (*)(double) >(&fabs),
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129 | boost::bind(&Vector::ScalarProduct, boost::cref(*iter), _1))
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130 | );
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131 | const double scp_sum = std::accumulate(scps.begin(), scps.end(), 0.);
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132 | ASSERT( (scp_sum-1.) > -MYEPSILON,
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133 | "ForceAnnealing() - sum of weights must be equal or larger one but is "
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134 | +toString(scp_sum));
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135 | weights.push_back( 1./scp_sum );
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136 | }
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137 | LOG(4, "DEBUG: Weights for atom #" << _walker.getId() << ": " << weights);
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138 |
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139 | // for testing we check whether all weighted scalar products now come out as 1.
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140 | #ifndef NDEBUG
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141 | for (std::vector<Vector>::const_iterator iter = BondVectors.begin();
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142 | iter != BondVectors.end(); ++iter) {
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143 | std::vector<double> scps;
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144 | scps.reserve(BondVectors.size());
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145 | std::transform(
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146 | BondVectors.begin(), BondVectors.end(),
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147 | weights.begin(),
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148 | std::back_inserter(scps),
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149 | boost::bind(static_cast< double (*)(double) >(&fabs),
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150 | boost::bind(std::multiplies<double>(),
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151 | boost::bind(&Vector::ScalarProduct, boost::cref(*iter), _1),
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152 | _2))
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153 | );
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154 | const double scp_sum = std::accumulate(scps.begin(), scps.end(), 0.);
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155 | ASSERT( fabs(scp_sum - 1.) < MYEPSILON,
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156 | "ForceAnnealing::operator() - for BondVector "+toString(*iter)
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157 | +" we have weighted scalar product of "+toString(scp_sum)+" != 1.");
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158 | }
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159 | #endif
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160 | return weights;
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161 | }
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