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<div class="title">vicinity.cpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> </div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// File: vicinity.cpp //</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Description: source file for particle vicinity (Cvicinity class) //</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// This file is part of the SISCone project. //</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// WARNING: this is not the main SISCone trunk but //</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// an adaptation to spherical coordinates //</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// For more details, see http://projects.hepforge.org/siscone //</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// //</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// Copyright (c) 2006-2008 Gavin Salam and Gregory Soyez //</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// //</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// This program is free software; you can redistribute it and/or modify //</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// it under the terms of the GNU General Public License as published by //</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// the Free Software Foundation; either version 2 of the License, or //</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// (at your option) any later version. //</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">// //</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// This program is distributed in the hope that it will be useful, //</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of //</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">// GNU General Public License for more details. //</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// //</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// You should have received a copy of the GNU General Public License //</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// along with this program; if not, write to the Free Software //</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA //</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">// //</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">// $Revision:: 255 $//</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">// $Date:: 2008-07-12 17:40:35 +0200 (Sat, 12 Jul 2008) $//</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"></span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include "vicinity.h"</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <math.h></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <algorithm></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <iostream></span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">namespace </span>siscone_spherical{</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">using namespace </span>std;</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * CSphvicinity_elm implementation *</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * element in the vicinity of a parent. *</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * class used to manage one points in the vicinity *</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * of a parent point. *</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> *************************************************************/</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">// ordering pointers to CSphvicinity_elm</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">//---------------------------------------</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="keywordtype">bool</span> ve_less(CSphvicinity_elm *ve1, CSphvicinity_elm *ve2){</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">return</span> ve1->angle < ve2->angle;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> }</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * CSphvicinity implementation *</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * list of element in the vicinity of a parent. *</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> * class used to manage the points which are in the vicinity *</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * of a parent point. The construction of the list can be *</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> * made from a list of points or from a quadtree. *</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> *************************************************************/</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment">// default constructor</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment">//---------------------</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"><a class="code" href="classsiscone__spherical_1_1CSphvicinity.html#a894c5b9dd56a8d64145c34d4b6eb5c26"> 62</a></span> <a class="code" href="classsiscone__spherical_1_1CSphvicinity.html#a894c5b9dd56a8d64145c34d4b6eb5c26" title="default constructor">CSphvicinity::CSphvicinity</a>(){</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  n_part = 0;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  ve_list = NULL;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor">#ifdef USE_QUADTREE_FOR_STABILITY_TEST</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor"></span> quadtree = NULL;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  parent = NULL;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  VR2 = VR = 0.0;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> }</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment">// constructor with initialisation</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment">//---------------------------------</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <a class="code" href="classsiscone__spherical_1_1CSphvicinity.html#a894c5b9dd56a8d64145c34d4b6eb5c26" title="default constructor">CSphvicinity::CSphvicinity</a>(vector<CSphmomentum> &_particle_list){</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  parent = NULL;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  ve_list = NULL;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="preprocessor">#ifdef USE_QUADTREE_FOR_STABILITY_TEST</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="preprocessor"></span> quadtree = NULL;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor"></span> cosVR = VR2 = tan2R = VR = 0.0;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  set_particle_list(_particle_list);</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> }</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment">// default destructor</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment">//--------------------</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"><a class="code" href="classsiscone__spherical_1_1CSphvicinity.html#a241263ff0147d378399848cdc91a804b"> 90</a></span> <a class="code" href="classsiscone__spherical_1_1CSphvicinity.html#a241263ff0147d378399848cdc91a804b" title="default destructor">CSphvicinity::~CSphvicinity</a>(){</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">if</span> (ve_list!=NULL)</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keyword">delete</span>[] ve_list;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="preprocessor">#ifdef USE_QUADTREE_FOR_STABILITY_TEST</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="preprocessor"></span> <span class="keywordflow">if</span> (quadtree!=NULL)</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keyword">delete</span> quadtree;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="preprocessor"></span>}</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> * set the particle_list</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> * - particle_list list of particles (type CSphmomentum)</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment"> * - n number of particles in the list</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"> ************************************************************/</span> </div>
<div class="line"><a name="l00105"></a><span class="lineno"><a class="code" href="classsiscone__spherical_1_1CSphvicinity.html#a9e635e40998eed7cf9e6f6e667d542e0"> 105</a></span> <span class="keywordtype">void</span> <a class="code" href="classsiscone__spherical_1_1CSphvicinity.html#a9e635e40998eed7cf9e6f6e667d542e0" title="set the particle_list">CSphvicinity::set_particle_list</a>(vector<CSphmomentum> &_particle_list){</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordtype">int</span> i,j;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="preprocessor">#ifdef USE_QUADTREE_FOR_STABILITY_TEST</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="preprocessor"></span> <span class="keywordtype">double</span> eta_max=0.0;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="preprocessor"></span> </div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="comment">// if the particle list is not empty, destroy it !</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">if</span> (ve_list!=NULL){</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keyword">delete</span>[] ve_list;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  }</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  vicinity.clear();</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="preprocessor">#ifdef USE_QUADTREE_FOR_STABILITY_TEST</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="preprocessor"></span> <span class="keywordflow">if</span> (quadtree!=NULL)</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keyword">delete</span> quadtree;</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="comment">// allocate memory array for particles</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="comment">// Note: - we compute max for |eta|</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="comment">// - we allocate indices to particles</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  n_part = 0;</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  plist.clear();</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  pincluded.clear();</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">for</span> (i=0;i<(int) _particle_list.size();i++){</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="comment">// if a particle is colinear with the beam (infinite rapidity)</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="comment">// we do not take it into account</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="comment">//if (fabs(_particle_list[i].pz)!=_particle_list[i].E){</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  plist.push_back(_particle_list[i]);</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  pincluded.push_back(<a class="code" href="classsiscone_1_1Cvicinity__inclusion.html" title="a class to keep track of inclusion status in cone and in cocircular region while using minimal resour...">siscone::Cvicinity_inclusion</a>()); <span class="comment">// zero inclusion status</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="comment">// the parent_index is handled in the split_merge because </span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="comment">// of our multiple-pass procedure.</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="comment">// Hence, it is not required here any longer.</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="comment">// plist[n_part].parent_index = i;</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  plist[n_part].index = n_part;</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="comment">// make sure the reference is randomly created</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  plist[n_part].ref.randomize();</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="preprocessor">#ifdef USE_QUADTREE_FOR_STABILITY_TEST</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="preprocessor"></span> <span class="keywordflow">if</span> (fabs(plist[n_part].eta)>eta_max) eta_max=fabs(plist[n_part].eta);</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="preprocessor"></span> n_part++;</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="comment">//}</span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  }</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> </div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="comment">// allocate quadtree and vicinity_elm list</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="comment">// note: we set phi in [-pi:pi] as it is the natural range for atan2!</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  ve_list = <span class="keyword">new</span> <a class="code" href="classsiscone__spherical_1_1CSphvicinity__elm.html" title="element in the vicinity of a parent.">CSphvicinity_elm</a>[2*n_part];</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="preprocessor">#ifdef USE_QUADTREE_FOR_STABILITY_TEST</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="preprocessor"></span> eta_max+=0.1;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  quadtree = <span class="keyword">new</span> <a class="code" href="classsiscone_1_1Cquadtree.html" title="Implementation of a 2D quadtree.">siscone::Cquadtree</a>(0.0, 0.0, eta_max, M_PI);</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="comment">// append particle to the vicinity_elm list</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  j = 0;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">for</span> (i=0;i<n_part;i++){</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="preprocessor">#ifdef USE_QUADTREE_FOR_STABILITY_TEST</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="preprocessor"></span> quadtree->add(&plist[i]);</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="preprocessor"></span> ve_list[j].v = ve_list[j+1].v = &plist[i];</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  ve_list[j].is_inside = ve_list[j+1].is_inside = &(pincluded[i]);</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  j+=2;</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  }</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> }</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> </div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"> * build the vicinity list from a list of points.</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"> * - _parent reference particle</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> * - _VR vicinity radius</span></div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> ************************************************************/</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"><a class="code" href="classsiscone__spherical_1_1CSphvicinity.html#af0a60cdbb9a0cb8450f4aaa539c99027"> 177</a></span> <span class="keywordtype">void</span> <a class="code" href="classsiscone__spherical_1_1CSphvicinity.html#af0a60cdbb9a0cb8450f4aaa539c99027" title="build the vicinity list from the list of points.">CSphvicinity::build</a>(<a class="code" href="classsiscone__spherical_1_1CSphmomentum.html" title="base class for dynamic coordinates management">CSphmomentum</a> *_parent, <span class="keywordtype">double</span> _VR){</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> </div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="comment">// set parent and radius</span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  parent = _parent;</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> </div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  VR = _VR;</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  VR2 = VR*VR;</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  cosVR = cos(VR);</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  R2 = 0.25*VR2;</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  R = 0.5*VR;</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keywordtype">double</span> tmp = tan(R);</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  tan2R = tmp*tmp;</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> </div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  D2_R = 2.0*(1-cos(R));</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="comment">//tmp = sqrt(D2_R);</span></div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  inv_R_EPS_COCIRC = 1.0 / R / <a class="code" href="defines_8h.html#a72664b4b6ab64c4dc09f83f1a190ff34" title="The following parameter controls cocircular situations.">EPSILON_COCIRCULAR</a>;</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  inv_R_2EPS_COCIRC = 0.5 / R / <a class="code" href="defines_8h.html#a72664b4b6ab64c4dc09f83f1a190ff34" title="The following parameter controls cocircular situations.">EPSILON_COCIRCULAR</a>;</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> </div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">// clear vicinity</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  vicinity.clear();</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> </div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="comment">// init parent variables</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="comment">// we cpte the direction of the centre and two orthogonal ones </span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="comment">// to measure the angles. Those are taken orthogonal to the</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="comment">// axis of smallest components (of the centre) to increase precision</span></div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  parent_centre = (*parent)/parent->_norm;</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  parent_centre.get_angular_directions(angular_dir1, angular_dir2);</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  angular_dir1 /= angular_dir1._norm;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  angular_dir2 /= angular_dir2._norm;</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  </div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="comment">// really browse the particle list</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">for</span> (i=0;i<n_part;i++){</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  append_to_vicinity(&plist[i]);</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  }</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> </div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="comment">// sort the vicinity</span></div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  sort(vicinity.begin(), vicinity.end(), ve_less);</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> </div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  vicinity_size = vicinity.size();</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> }</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> </div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> </div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="comment">//TODO//</span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="keyword">inline</span> <span class="keywordtype">double</span> sort_angle(<span class="keywordtype">double</span> s, <span class="keywordtype">double</span> c){</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">if</span> (s==0) <span class="keywordflow">return</span> (c>0) ? 0.0 : 2.0;</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordtype">double</span> t=c/s;</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">return</span> (s>0) ? 1-t/(1+fabs(t)) : 3-t/(1+fabs(t));</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> }</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> </div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> </div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment"> * append a particle to the 'vicinity' list after</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"> * having computed the angular-ordering quantities</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment"> * - v vector to test</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment"> **********************************************************/</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"><a class="code" href="classsiscone__spherical_1_1CSphvicinity.html#a5f9a8fba7daf912451a899e2b0b24150"> 234</a></span> <span class="keywordtype">void</span> <a class="code" href="classsiscone__spherical_1_1CSphvicinity.html#a5f9a8fba7daf912451a899e2b0b24150" title="append a particle to the 'vicinity' list after having tested it and computed the angular-ordering qua...">CSphvicinity::append_to_vicinity</a>(<a class="code" href="classsiscone__spherical_1_1CSphmomentum.html" title="base class for dynamic coordinates management">CSphmomentum</a> *v){</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="comment">// skip the particle itself)</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordflow">if</span> (v==parent)</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> </div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordtype">int</span> i=2*(v-><a class="code" href="classsiscone__spherical_1_1CSphmomentum.html#a2ac98fc4834d099a381c7fb8a0686364" title="internal particle number">index</a>);</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> </div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="comment">// compute the distance of the i-th particle with the parent</span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordtype">double</span> dot = dot_product3(parent_centre,*v);</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <a class="code" href="classsiscone__spherical_1_1CSph3vector.html" title="base class for managing the spatial part of Cmomentum (defined after)">CSph3vector</a> vnormal = *v;</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  vnormal/=v-><a class="code" href="classsiscone__spherical_1_1CSph3vector.html#aae5036cec284546d1ae674b28038993e" title="particle spatial norm (available ONLY after a call to build_norm)">_norm</a>;</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  dot/=v-><a class="code" href="classsiscone__spherical_1_1CSph3vector.html#aae5036cec284546d1ae674b28038993e" title="particle spatial norm (available ONLY after a call to build_norm)">_norm</a>;</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> </div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="comment">// really check if the distance is less than VR</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="keywordflow">if</span> (dot>cosVR){</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <a class="code" href="classsiscone__spherical_1_1CSph3vector.html" title="base class for managing the spatial part of Cmomentum (defined after)">CSph3vector</a> cross = cross_product3(parent_centre,vnormal);</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> </div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="comment">// for the centres</span></div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <a class="code" href="classsiscone__spherical_1_1CSph3vector.html" title="base class for managing the spatial part of Cmomentum (defined after)">CSph3vector</a> median = (parent_centre+vnormal);</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keywordtype">double</span> amplT = sqrt((tan2R*(1+dot)+(dot-1))*(1+dot));</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <a class="code" href="classsiscone__spherical_1_1CSph3vector.html" title="base class for managing the spatial part of Cmomentum (defined after)">CSph3vector</a> transverse = amplT*cross/cross.<a class="code" href="classsiscone__spherical_1_1CSph3vector.html#aae5036cec284546d1ae674b28038993e" title="particle spatial norm (available ONLY after a call to build_norm)">_norm</a>;</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="comment">// first angle (+)</span></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  ve_list[i].centre = median + transverse;</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  ve_list[i].centre.<a class="code" href="classsiscone__spherical_1_1CSph3vector.html#a019ea6857216d98b2c230b7598da77d0" title="build the spatial normfrom 4-momentum info !!! WARNING !!! !!! computing the norm is the only time-co...">build_norm</a>();</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  ve_list[i].centre/=ve_list[i].centre._norm; </div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <a class="code" href="classsiscone__spherical_1_1CSph3vector.html" title="base class for managing the spatial part of Cmomentum (defined after)">CSph3vector</a> diff = ve_list[i].centre - parent_centre;</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="comment">//ve_list[i].angle = atan2(dot_product3(angular_dir2, diff),dot_product3(angular_dir1, diff));</span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  ve_list[i].angle = sort_angle(dot_product3(angular_dir2, diff),dot_product3(angular_dir1, diff));</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  ve_list[i].side = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  ve_list[i].cocircular.clear();</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  vicinity.push_back(&(ve_list[i]));</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> </div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="comment">// second angle (-) </span></div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  ve_list[i+1].centre = median - transverse;</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  ve_list[i+1].centre.<a class="code" href="classsiscone__spherical_1_1CSph3vector.html#a019ea6857216d98b2c230b7598da77d0" title="build the spatial normfrom 4-momentum info !!! WARNING !!! !!! computing the norm is the only time-co...">build_norm</a>();</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  ve_list[i+1].centre/=ve_list[i+1].centre._norm; </div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  diff = ve_list[i+1].centre - parent_centre;</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  ve_list[i+1].angle = sort_angle(dot_product3(angular_dir2, diff),dot_product3(angular_dir1, diff));</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  ve_list[i+1].side = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  ve_list[i+1].cocircular.clear();</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  vicinity.push_back(&(ve_list[i+1]));</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> </div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="comment">// now work out the cocircularity range for the two points (range</span></div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="comment">// of angle within which the points stay within a distance</span></div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="comment">// EPSILON_COCIRCULAR of circule</span></div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="comment">// P = parent; C = child; O = Origin (center of circle)</span></div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <a class="code" href="classsiscone__spherical_1_1CSph3vector.html" title="base class for managing the spatial part of Cmomentum (defined after)">CSph3vector</a> OP = parent_centre - ve_list[i+1].centre;</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <a class="code" href="classsiscone__spherical_1_1CSph3vector.html" title="base class for managing the spatial part of Cmomentum (defined after)">CSph3vector</a> OC = vnormal - ve_list[i+1].centre;</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  </div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="comment">// two sources of error are (GPS CCN29-19) epsilon/(R sin theta)</span></div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="comment">// and sqrt(2*epsilon/(R (1-cos theta))) and the way things work</span></div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="comment">// out, it is the _smaller_ of the two that is relevant [NB have</span></div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="comment">// changed definition of theta here relative to that used in</span></div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="comment">// CCN29] [NB2: write things so as to avoid zero denominators and</span></div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="comment">// to minimize the multiplications, divisions and above all sqrts</span></div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="comment">// -- that means that c & s are defined including a factor of VR2]</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="keywordtype">double</span> inv_err1 = cross_product3(OP,OC).<a class="code" href="classsiscone__spherical_1_1CSph3vector.html#aae5036cec284546d1ae674b28038993e" title="particle spatial norm (available ONLY after a call to build_norm)">_norm</a> * inv_R_EPS_COCIRC;</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordtype">double</span> inv_err2_sq = (D2_R-dot_product3(OP,OC)) * inv_R_2EPS_COCIRC;</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  ve_list[i].cocircular_range = siscone::pow2(inv_err1) > inv_err2_sq ? </div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  1.0/inv_err1 : </div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  sqrt(1.0/inv_err2_sq);</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  ve_list[i+1].cocircular_range = ve_list[i].cocircular_range;</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  }</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> }</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> </div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> }</div>
</div><!-- fragment --></div><!-- contents -->
<address style="align: right;"><small>
The <a href="http://projects.hepforge.org/siscone" target="_top">
SISCone</a> project has been developed by
<a href="http://www.lpthe.jussieu.fr/~salam" target="_top">
Gavin Salam</a> and
<a href="http://www.theo.phys.ulg.ac.be/~soyez" target="_top">
Gregory Soyez</a><br>
Documentation generated on Mon May 6 2013 11:30:35 for SISCone by
<a href="http://www.doxygen.org/index.html">Doxygen</a> 1.8.3.1
</small>
</address>
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