1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4CircularCurve.cc,v 1.10 2006/06/29 18:41:52 gunter Exp $ |
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28 | // GEANT4 tag $Name: HEAD $ |
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29 | // |
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30 | // ---------------------------------------------------------------------- |
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31 | // GEANT 4 class source file |
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32 | // |
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33 | // G4CircularCurve.cc |
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34 | // |
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35 | // ---------------------------------------------------------------------- |
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36 | |
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37 | #include "G4CircularCurve.hh" |
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38 | #include "G4Ellipse.hh" |
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39 | |
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40 | // G4CircularCurve |
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41 | G4CircularCurve::G4CircularCurve() {} |
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42 | G4CircularCurve::~G4CircularCurve() {} |
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43 | |
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44 | G4CircularCurve::G4CircularCurve(const G4CircularCurve& right) |
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45 | : G4Conic(), radius(right.radius) |
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46 | { |
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47 | pShift = right.pShift; |
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48 | position = right.position; |
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49 | bBox = right.bBox; |
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50 | start = right.start; |
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51 | end = right.end; |
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52 | pStart = right.pStart; |
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53 | pEnd = right.pEnd; |
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54 | pRange = right.pRange; |
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55 | bounded = right.bounded; |
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56 | sameSense = right.sameSense; |
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57 | } |
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58 | |
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59 | G4CircularCurve& |
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60 | G4CircularCurve::operator=(const G4CircularCurve& right) |
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61 | { |
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62 | if (&right == this) return *this; |
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63 | |
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64 | radius = right.radius; |
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65 | pShift = right.pShift; |
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66 | position = right.position; |
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67 | bBox = right.bBox; |
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68 | start = right.start; |
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69 | end = right.end; |
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70 | pStart = right.pStart; |
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71 | pEnd = right.pEnd; |
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72 | pRange = right.pRange; |
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73 | bounded = right.bounded; |
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74 | sameSense = right.sameSense; |
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75 | |
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76 | return *this; |
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77 | } |
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78 | |
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79 | ////////////////////////////////////////////////////////////////////////////// |
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80 | |
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81 | void G4CircularCurve::InitBounded() |
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82 | { |
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83 | // the bbox must include the start and endpoints as well as the |
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84 | // extreme points if they lie on the curve |
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85 | bBox.Init(GetStart(), GetEnd()); |
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86 | |
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87 | // the parameter values |
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88 | // belonging to the points with an extreme x, y and z coordinate |
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89 | for (G4int i=0; i<3; i++) |
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90 | { |
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91 | G4double u = std::atan2(position.GetPY()(i), position.GetPX()(i)); |
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92 | |
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93 | if (IsPOn(u)) |
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94 | bBox.Extend(GetPoint(u)); |
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95 | |
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96 | if (IsPOn(u+pi)) |
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97 | bBox.Extend(GetPoint(u+pi)); |
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98 | } |
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99 | } |
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100 | |
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101 | ////////////////////////////////////////////////////////////////////////////// |
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102 | |
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103 | G4Curve* G4CircularCurve::Project(const G4Transform3D& tr) |
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104 | { |
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105 | G4Ellipse e; |
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106 | e.Init(position, radius, radius); |
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107 | e.SetBounds(GetPStart(), GetPEnd()); |
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108 | |
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109 | return e.Project(tr); |
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110 | } |
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111 | |
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112 | ////////////////////////////////////////////////////////////////////////////// |
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113 | |
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114 | G4bool G4CircularCurve::Tangent(G4CurvePoint& cp, G4Vector3D& v) |
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115 | { |
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116 | // The tangent is computed from the 3D point representation |
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117 | // for all conics. An alternaive implementation (based on |
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118 | // the parametric point) might be worthwhile adding |
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119 | // for efficiency. |
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120 | |
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121 | const G4Axis2Placement3D& pos= *(GetPosition()); |
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122 | G4Point3D p= pos.GetToPlacementCoordinates() * cp.GetPoint(); |
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123 | |
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124 | v= -p.y()*pos.GetPX() + p.x()*pos.GetPY(); |
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125 | return true; |
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126 | } |
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127 | |
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128 | G4double G4CircularCurve::GetPMax() const |
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129 | { |
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130 | return twopi; |
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131 | } |
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132 | |
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133 | G4Point3D G4CircularCurve::GetPoint(G4double param) const |
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134 | { |
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135 | return G4Point3D( position.GetLocation()+radius* |
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136 | ( std::cos(param)*position.GetPX() + std::sin(param)*position.GetPY() ) ); |
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137 | } |
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138 | |
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139 | G4double G4CircularCurve::GetPPoint(const G4Point3D& pt) const |
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140 | { |
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141 | G4Point3D ptLocal= position.GetToPlacementCoordinates()*pt; |
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142 | G4double angle= std::atan2(ptLocal.y(), ptLocal.x()); |
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143 | return (angle<0)? angle+twopi: angle; |
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144 | } |
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145 | |
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146 | //////////////////////////////////////////////////////////////////////////// |
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147 | |
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148 | /* |
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149 | #include "G4CurveRayIntersection.hh" |
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150 | |
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151 | void G4CircularCurve::IntersectRay2D(const G4Ray&, |
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152 | G4CurveRayIntersection&) |
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153 | { |
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154 | G4Exception("G4CircularCurve::IntersectRay2D()", |
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155 | "NotApplicable", FatalException, |
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156 | "G4CircularCurve is always 3D!"); |
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157 | } |
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158 | */ |
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159 | |
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160 | G4int G4CircularCurve::IntersectRay2D(const G4Ray&) |
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161 | { |
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162 | G4Exception("G4CircularCurve::IntersectRay2D()", |
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163 | "NotApplicable", FatalException, |
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164 | "G4CircularCurve is always 3D!"); |
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165 | return 0; |
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166 | } |
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