1 | #include <iostream> |
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2 | #include <vector> |
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3 | #include <string> |
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4 | #include <cmath> |
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5 | #include "Particle.h" |
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6 | using namespace std; |
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7 | |
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8 | |
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9 | //==================================Constructors, destructor==================================== |
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10 | |
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11 | Particle::Particle(double x, double dx, double y, double dy, double deltaE, double t, double mass, double charge, double moment) |
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12 | : Ap0(mass), Zp0(charge), dpoporiginal(moment) |
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13 | { |
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14 | coordonnees[0][0] = x; |
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15 | coordonnees[0][1] = dx; |
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16 | coordonnees[0][2] = y; |
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17 | coordonnees[0][3] = dy; |
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18 | coordonnees[0][4] = deltaE; |
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19 | coordonnees[0][5] = t; |
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20 | inabs = 1; |
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21 | coordonnees[1][0] = 0; |
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22 | coordonnees[1][1] = 0; |
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23 | coordonnees[1][2] = 0; |
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24 | coordonnees[1][3] = 0; |
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25 | coordonnees[1][4] = 0; |
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26 | coordonnees[1][5] = 0; |
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27 | } |
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28 | |
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29 | |
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30 | |
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31 | Particle::Particle(const Particle& obj) |
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32 | : Ap0(obj.Ap0), |
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33 | Zp0(obj.Zp0), |
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34 | in(obj.in), |
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35 | inabs(obj.inabs), |
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36 | nrevhitp(obj.nrevhitp), |
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37 | dpoporiginal(obj.dpoporiginal), |
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38 | dt(obj.dt) |
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39 | |
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40 | { |
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41 | coordonnees[0][0] = obj.coordonnees[0][0]; |
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42 | coordonnees[0][1] = obj.coordonnees[0][1]; |
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43 | coordonnees[0][2] = obj.coordonnees[0][2]; |
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44 | coordonnees[0][3] = obj.coordonnees[0][3]; |
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45 | coordonnees[0][4] = obj.coordonnees[0][4]; |
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46 | coordonnees[0][5] = obj.coordonnees[0][5]; |
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47 | identification = obj.getidentification(); |
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48 | } |
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49 | |
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50 | |
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51 | |
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52 | void Particle::afficheCoordonnees() |
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53 | { |
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54 | |
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55 | for (int j(0); j < 2; ++j) { |
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56 | for (int i(0); i < 6; ++i) { |
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57 | cout << "Here is the " << i + 1 << "th coordinate of the particle at the " << j + 1 << "th interpolation point: " << coordonnees[j][i] << endl; |
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58 | } |
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59 | } |
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60 | |
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61 | } |
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62 | |
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63 | |
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64 | |
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65 | void Particle::afficheFirstCoordonnees() |
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66 | { |
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67 | for (int i(0); i < 6; ++i) { |
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68 | cout << "Here is the " << i + 1 << "th coordinate of the particle:" << coordonnees[0][i] << endl; |
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69 | } |
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70 | } |
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71 | |
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72 | |
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73 | int Particle::incog(double a, double x, double& gin, double& gim, double& gip) |
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74 | { |
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75 | |
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76 | double xam, r, s, ga, t0; |
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77 | int k; |
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78 | |
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79 | if ((a < 0.0) || (x < 0)) { |
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80 | return 1; |
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81 | } |
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82 | xam = -x + a * log(x); |
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83 | if ((xam > 700) || ( a > 170.0)) { |
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84 | return 1; |
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85 | } |
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86 | if (x == 0.0) { |
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87 | gin = 0.0; |
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88 | gim = exp(gamma(a)); |
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89 | gip = 0.0; |
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90 | return 0; |
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91 | } |
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92 | if (x <= 1.0 + a) { |
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93 | s = 1.0 / a; |
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94 | r = s; |
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95 | for (k = 1; k <= 60; k++) { |
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96 | r *= x / (a + k); |
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97 | s += r; |
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98 | if (fabs(r / s) < 1e-15) { |
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99 | break; |
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100 | } |
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101 | } |
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102 | gin = exp(xam) * s; |
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103 | ga = exp(gamma(a)); |
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104 | gip = gin / ga; |
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105 | gim = ga - gin; |
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106 | } else { |
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107 | t0 = 0.0; |
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108 | for (k = 60; k >= 1; k--) { |
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109 | t0 = (k - a) / (1.0 + k / (x + t0)); |
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110 | } |
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111 | gim = exp(xam) / (x + t0); |
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112 | ga = exp(gamma(a)); |
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113 | gin = ga - gim; |
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114 | gip = 1.0 - gim / ga; |
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115 | } |
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116 | return 0; |
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117 | } |
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118 | |
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119 | |
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120 | int Particle::getidentification() const |
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121 | { |
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122 | return identification; |
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123 | } |
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124 | |
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125 | |
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126 | void Particle::setidentification(int id) |
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127 | { |
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128 | identification = id; |
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129 | } |
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130 | |
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131 | |
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132 | Particle& Particle::operator=(Particle const& source) |
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133 | { |
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134 | Ap0 = source.Ap0; |
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135 | Zp0 = source.Zp0; |
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136 | inabs = source.inabs; |
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137 | for (int i(0); i < 2; ++i) { |
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138 | for (int j(0); j < 6; ++j) { |
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139 | coordonnees[i][j] = source.coordonnees[i][j]; |
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140 | } |
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141 | } |
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142 | nrevhitp = source.nrevhitp; |
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143 | in = source.in; |
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144 | identification = source.getidentification(); |
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145 | |
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146 | return *this; |
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147 | } |
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148 | |
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149 | |
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150 | double Particle::random() |
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151 | { |
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152 | double num; |
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153 | num = rand() / double(RAND_MAX); |
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154 | return -num; |
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155 | //return -0.5;//this lign can be uncomment to fix the randomness for tests (see the file randomness.txt) |
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156 | } |
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157 | |
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158 | |
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159 | void Particle::genpartdist(const int& i0, const int& n, const string& type, const double& r1r2skin, const double& emx, const double& emy, const double& sigdpp, const double& bx, const double& ax, const double& dx, const double& dpx, const double& by, const double& ay, const double& dy, const double& dpy, const double& nsigi) |
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160 | { |
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161 | |
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162 | int nh; |
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163 | double nr, sum, Rx, Ry; |
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164 | vector < vector < double > > h1, h; |
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165 | vector < double > hsum1, hsum, xh, yh, xsh, ysh; |
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166 | |
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167 | nh = (int)ceil(n / 0.29); |
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168 | nr = 0; |
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169 | |
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170 | //after this loop: |
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171 | //h is 4 x nr, where nr>=n |
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172 | //length of all columns is less than 1 |
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173 | //elements of h uniformly distributed between -1 and 1 |
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174 | |
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175 | while (nr < n) { |
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176 | |
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177 | hsum.clear(); |
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178 | hsum1.clear(); |
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179 | h.clear(); |
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180 | h1.clear(); |
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181 | |
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182 | for (int i(0); i < 4; ++i) { |
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183 | h.push_back(vector <double> (nh)); |
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184 | for (int j(0); j < nh; ++j) { |
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185 | h[i][j] = (-2 * random() - 1); //uniformly distributed numbers in [-1,1] |
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186 | } |
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187 | } |
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188 | |
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189 | for (int k(0); k < nh; ++k) { |
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190 | sum = 0; |
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191 | for (int l(0); l < 4; ++l) { |
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192 | sum = sum + (h[k][l] * h[k][l]); |
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193 | } |
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194 | |
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195 | hsum.push_back(sum); |
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196 | } |
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197 | |
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198 | int incr(0); |
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199 | |
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200 | for (int i(0); i < nh; ++i) { |
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201 | if (hsum[i] < 1) { |
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202 | h1.push_back(vector < double > (4)); |
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203 | for (int l(0); l < 4; ++l) { |
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204 | h1[incr][l] = h[i][l]; |
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205 | } |
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206 | hsum1.push_back(hsum[i]); |
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207 | ++incr; |
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208 | } |
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209 | } |
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210 | |
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211 | nr = hsum1.size(); |
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212 | |
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213 | }//end while |
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214 | |
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215 | for (int i(0); i < nr; ++i) { |
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216 | hsum1[i] = sqrt(hsum1[i]); |
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217 | } |
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218 | |
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219 | h.clear(); |
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220 | hsum.clear(); |
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221 | |
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222 | for (int j(0); j < n; ++j) { |
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223 | h.push_back(h1[j]); |
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224 | hsum.push_back(hsum1[j]); |
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225 | } |
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226 | |
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227 | if (type == "kv") { |
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228 | for (int i(0); i < n; ++i) { |
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229 | for (int j(0); j < 4; ++j) { |
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230 | h[i][j] = h[i][j] / hsum[i]; //normalizes the columns of h |
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231 | } |
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232 | } |
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233 | |
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234 | Rx = sqrt(emx); |
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235 | Ry = sqrt(emy); |
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236 | |
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237 | for (int k(0); k < n; ++k) { |
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238 | xh.push_back(Rx * h[k][0]); |
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239 | yh.push_back(Ry * h[k][1]); |
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240 | xsh.push_back(Rx * h[k][2]); |
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241 | ysh.push_back(Ry * h[k][3]); |
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242 | } |
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243 | |
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244 | } //end if |
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245 | |
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246 | else if (type == "waterbag") { |
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247 | //xh uniformly distributed on [-sqrt(emx) sqrt(emx)] |
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248 | //similarly yh, xsh, ysh |
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249 | //BUT such that length([xh/sqrt(emx) ...])>1 |
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250 | Rx = sqrt(emx); |
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251 | Ry = sqrt(emy); |
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252 | |
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253 | for (int k(0); k < n; ++k) { |
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254 | xh.push_back(Rx * h[k][0]); |
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255 | yh.push_back(Ry * h[k][1]); |
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256 | xsh.push_back(Rx * h[k][2]); |
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257 | ysh.push_back(Ry * h[k][3]); |
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258 | } |
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259 | } |
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260 | |
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261 | else if (type == "r1r2") { |
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262 | double R2 , rv; |
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263 | R2 = sqrt(r1r2skin); |
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264 | rv = pow(((R2 * R2 * R2 * R2 - 1) * (-random() + 1 / (R2 * R2 * R2 * R2 - 1))), 0.25); |
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265 | |
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266 | for (int i(0); i < n; ++i) { |
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267 | for (int j(0); j < 4; ++j) { |
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268 | h[i][j] = rv * h[i][j] / hsum[i]; |
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269 | } |
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270 | } |
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271 | |
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272 | Rx = sqrt(emx); |
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273 | Ry = sqrt(emy); |
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274 | |
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275 | for (int k(0); k < n; ++k) { |
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276 | xh.push_back(Rx * h[k][0]); |
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277 | yh.push_back(Ry * h[k][1]); |
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278 | xsh.push_back(Rx * h[k][2]); |
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279 | ysh.push_back(Ry * h[k][3]); |
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280 | } |
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281 | } else if (type == "gauss") { |
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282 | |
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283 | int p(3); |
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284 | vector <double> rh, fh; |
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285 | int step, temp, count; |
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286 | double gin1, gim1, gip1, gin2, gim2, gip2, randnumber, rv; |
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287 | |
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288 | rh.push_back(0); |
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289 | |
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290 | step = (int)(nsigi / 0.001) + 1; |
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291 | |
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292 | for (int u(0); u < step; ++u) { |
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293 | rh.push_back(rh[rh.size() - 1] + 0.001); |
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294 | } |
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295 | temp = incog((1 + p) / 2, 0.5 * nsigi * nsigi, gin2, gim2, gip2); |
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296 | |
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297 | for (int u(0); u <= step; ++u) { |
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298 | temp = incog((1 + p) / 2, 0.5 * rh[u] * rh[u], gin1, gim1, gip1); |
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299 | fh.push_back(gin1 / gin2); |
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300 | } |
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301 | |
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302 | randnumber = -random(); |
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303 | |
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304 | count = 0; |
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305 | for (int k(0); k < step; ++k) { |
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306 | if ((randnumber > fh[k]) && (randnumber < fh[k + 1])) { |
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307 | break; |
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308 | } else { |
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309 | ++ count; |
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310 | } |
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311 | } |
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312 | |
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313 | rv = interp1(fh[count], rh[count], fh[count + 1], rh[count + 1], randnumber); |
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314 | |
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315 | for (int i(0); i < n; ++i) { |
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316 | for (int j(0); j < 4; ++j) { |
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317 | h[i][j] = rv * h[i][j] / hsum[i]; |
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318 | } |
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319 | } |
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320 | |
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321 | Rx = sqrt(emx); |
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322 | Ry = sqrt(emy); |
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323 | |
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324 | for (int k(0); k < n; ++k) { |
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325 | xh.push_back(Rx * h[k][0]); |
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326 | yh.push_back(Ry * h[k][1]); |
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327 | xsh.push_back(Rx * h[k][2]); |
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328 | ysh.push_back(Ry * h[k][3]); |
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329 | } |
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330 | |
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331 | } else { |
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332 | |
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333 | cerr << "GENPARTDIST ERROR: Distribution type " << type << " not implemented !" << endl; |
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334 | } |
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335 | |
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336 | |
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337 | //generating a normal random variable using Box Muller method |
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338 | |
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339 | |
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340 | this->coordonnees[0][4] = sigdpp * sqrt(-2 * log(-random())) * cos(2 * M_PI * (-random())); |
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341 | this->coordonnees[0][0] = sqrt(bx) * xh[0] + dx * this->coordonnees[0][4]; |
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342 | this->coordonnees[0][1] = -ax / sqrt(bx) * xh[0] + xsh[0] / sqrt(bx) + dpx * this->coordonnees[0][4]; |
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343 | this->coordonnees[0][2] = sqrt(by) * yh[0] + dy * this->coordonnees[0][4]; |
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344 | this->coordonnees[0][3] = -ay / sqrt(by) * yh[0] + ysh[0] / sqrt(by) + dpy * this->coordonnees[0][4]; |
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345 | this->dt = 0; |
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346 | this->dpoporiginal = this->coordonnees[0][4]; |
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347 | |
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348 | //afficheFirstCoordonnees(); |
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349 | |
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350 | |
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351 | } |
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352 | |
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353 | |
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354 | double Particle::interp1(double x1, double y1, double x2, double y2, double x) |
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355 | { |
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356 | |
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357 | double d1(x1 - x2); |
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358 | double d2(y1 - y2); |
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359 | |
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360 | double y; |
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361 | |
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362 | y = (x - x1) * (d2 / d1) + y1; |
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363 | |
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364 | return y; |
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365 | } |
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366 | |
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367 | |
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