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: G4VSolid.cc,v 1.39 2008/09/23 13:07:41 gcosmo Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03 $ |
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29 | // |
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30 | // class G4VSolid |
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31 | // |
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32 | // Implementation for solid base class |
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33 | // |
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34 | // History: |
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35 | // |
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36 | // 06.12.02 V.Grichine, restored original conditions in ClipPolygon() |
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37 | // 10.05.02 V.Grichine, ClipPolygon(): clip only other axis and limited voxels |
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38 | // 15.04.02 V.Grichine, bug fixed in ClipPolygon(): clip only one axis |
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39 | // 13.03.02 V.Grichine, cosmetics of voxel limit functions |
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40 | // 15.11.00 D.Williams, V.Grichine, fix in CalculateClippedPolygonExtent() |
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41 | // 10.07.95 P.Kent, Added == operator, solid Store entry |
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42 | // 30.06.95 P.Kent, Created. |
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43 | // -------------------------------------------------------------------- |
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44 | |
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45 | #include "G4VSolid.hh" |
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46 | #include "G4SolidStore.hh" |
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47 | #include "globals.hh" |
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48 | #include "Randomize.hh" |
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49 | #include "G4GeometryTolerance.hh" |
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50 | |
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51 | #include "G4VoxelLimits.hh" |
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52 | #include "G4AffineTransform.hh" |
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53 | #include "G4VisExtent.hh" |
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54 | |
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55 | ////////////////////////////////////////////////////////////////////////// |
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56 | // |
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57 | // Constructor |
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58 | // - Copies name |
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59 | // - Add ourselves to solid Store |
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60 | |
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61 | G4VSolid::G4VSolid(const G4String& name) |
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62 | : fshapeName(name) |
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63 | { |
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64 | kCarTolerance = G4GeometryTolerance::GetInstance()->GetSurfaceTolerance(); |
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65 | |
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66 | // Register to store |
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67 | // |
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68 | G4SolidStore::GetInstance()->Register(this); |
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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 | // Copy constructor |
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74 | // |
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75 | |
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76 | G4VSolid::G4VSolid(const G4VSolid& rhs) |
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77 | : kCarTolerance(rhs.kCarTolerance), fshapeName(rhs.fshapeName) |
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78 | { |
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79 | // Register to store |
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80 | // |
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81 | G4SolidStore::GetInstance()->Register(this); |
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82 | } |
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83 | |
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84 | ////////////////////////////////////////////////////////////////////////// |
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85 | // |
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86 | // Fake default constructor - sets only member data and allocates memory |
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87 | // for usage restricted to object persistency. |
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88 | // |
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89 | G4VSolid::G4VSolid( __void__& ) |
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90 | : fshapeName("") |
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91 | { |
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92 | // Register to store |
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93 | // |
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94 | G4SolidStore::GetInstance()->Register(this); |
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95 | } |
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96 | |
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97 | ////////////////////////////////////////////////////////////////////////// |
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98 | // |
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99 | // Destructor (virtual) |
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100 | // - Remove ourselves from solid Store |
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101 | |
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102 | G4VSolid::~G4VSolid() |
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103 | { |
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104 | G4SolidStore::GetInstance()->DeRegister(this); |
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105 | } |
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106 | |
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107 | ////////////////////////////////////////////////////////////////////////// |
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108 | // |
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109 | // Assignment operator |
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110 | |
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111 | G4VSolid& G4VSolid::operator = (const G4VSolid& rhs) |
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112 | { |
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113 | // Check assignment to self |
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114 | // |
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115 | if (this == &rhs) { return *this; } |
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116 | |
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117 | // Copy data |
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118 | // |
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119 | kCarTolerance = rhs.kCarTolerance; |
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120 | fshapeName = rhs.fshapeName; |
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121 | |
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122 | return *this; |
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123 | } |
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124 | |
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125 | ////////////////////////////////////////////////////////////////////////// |
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126 | // |
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127 | // Streaming operator dumping solid contents |
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128 | |
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129 | std::ostream& operator<< ( std::ostream& os, const G4VSolid& e ) |
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130 | { |
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131 | return e.StreamInfo(os); |
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132 | } |
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133 | |
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134 | ////////////////////////////////////////////////////////////////////////// |
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135 | // |
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136 | // Throw exception if ComputeDimensions called for illegal derived class |
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137 | |
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138 | void G4VSolid::ComputeDimensions(G4VPVParameterisation*, |
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139 | const G4int, |
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140 | const G4VPhysicalVolume*) |
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141 | { |
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142 | G4cerr << "ERROR - Illegal call to G4VSolid::ComputeDimensions()" << G4endl |
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143 | << " Method not overloaded by derived class !" << G4endl; |
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144 | G4Exception("G4VSolid::ComputeDimensions()", "NotApplicable", |
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145 | FatalException, "Illegal call to case class."); |
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146 | } |
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147 | |
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148 | ////////////////////////////////////////////////////////////////////////// |
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149 | // |
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150 | // Throw exception (warning) for solids not implementing the method |
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151 | |
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152 | G4ThreeVector G4VSolid::GetPointOnSurface() const |
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153 | { |
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154 | G4cerr << "WARNING - G4VSolid::GetPointOnSurface()" << G4endl |
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155 | << " Not implemented for solid: " |
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156 | << this->GetEntityType() << " !" << G4endl; |
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157 | G4Exception("G4VSolid::GetPointOnSurface()", "NotImplemented", |
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158 | JustWarning, "Not implemented for this solid ! Returning origin."); |
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159 | return G4ThreeVector(0,0,0); |
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160 | } |
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161 | |
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162 | /////////////////////////////////////////////////////////////////////////// |
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163 | // |
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164 | // Calculate the maximum and minimum extents of the polygon described |
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165 | // by the vertices: pSectionIndex->pSectionIndex+1-> |
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166 | // pSectionIndex+2->pSectionIndex+3->pSectionIndex |
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167 | // in the List pVertices |
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168 | // |
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169 | // If the minimum is <pMin pMin is set to the new minimum |
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170 | // If the maximum is >pMax pMax is set to the new maximum |
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171 | // |
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172 | // No modifications are made to pVertices |
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173 | // |
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174 | |
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175 | void G4VSolid::ClipCrossSection( G4ThreeVectorList* pVertices, |
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176 | const G4int pSectionIndex, |
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177 | const G4VoxelLimits& pVoxelLimit, |
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178 | const EAxis pAxis, |
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179 | G4double& pMin, G4double& pMax) const |
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180 | { |
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181 | |
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182 | G4ThreeVectorList polygon; |
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183 | polygon.reserve(4); |
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184 | polygon.push_back((*pVertices)[pSectionIndex]); |
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185 | polygon.push_back((*pVertices)[pSectionIndex+1]); |
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186 | polygon.push_back((*pVertices)[pSectionIndex+2]); |
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187 | polygon.push_back((*pVertices)[pSectionIndex+3]); |
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188 | // G4cout<<"ClipCrossSection: 0-1-2-3"<<G4endl; |
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189 | CalculateClippedPolygonExtent(polygon,pVoxelLimit,pAxis,pMin,pMax); |
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190 | return; |
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191 | } |
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192 | |
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193 | ////////////////////////////////////////////////////////////////////////////////// |
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194 | // |
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195 | // Calculate the maximum and minimum extents of the polygons |
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196 | // joining the CrossSections at pSectionIndex->pSectionIndex+3 and |
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197 | // pSectionIndex+4->pSectionIndex7 |
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198 | // |
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199 | // in the List pVertices, within the boundaries of the voxel limits pVoxelLimit |
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200 | // |
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201 | // If the minimum is <pMin pMin is set to the new minimum |
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202 | // If the maximum is >pMax pMax is set to the new maximum |
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203 | // |
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204 | // No modifications are made to pVertices |
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205 | |
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206 | void G4VSolid::ClipBetweenSections( G4ThreeVectorList* pVertices, |
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207 | const G4int pSectionIndex, |
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208 | const G4VoxelLimits& pVoxelLimit, |
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209 | const EAxis pAxis, |
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210 | G4double& pMin, G4double& pMax) const |
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211 | { |
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212 | G4ThreeVectorList polygon; |
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213 | polygon.reserve(4); |
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214 | polygon.push_back((*pVertices)[pSectionIndex]); |
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215 | polygon.push_back((*pVertices)[pSectionIndex+4]); |
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216 | polygon.push_back((*pVertices)[pSectionIndex+5]); |
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217 | polygon.push_back((*pVertices)[pSectionIndex+1]); |
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218 | // G4cout<<"ClipBetweenSections: 0-4-5-1"<<G4endl; |
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219 | CalculateClippedPolygonExtent(polygon,pVoxelLimit,pAxis,pMin,pMax); |
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220 | polygon.clear(); |
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221 | |
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222 | polygon.push_back((*pVertices)[pSectionIndex+1]); |
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223 | polygon.push_back((*pVertices)[pSectionIndex+5]); |
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224 | polygon.push_back((*pVertices)[pSectionIndex+6]); |
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225 | polygon.push_back((*pVertices)[pSectionIndex+2]); |
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226 | // G4cout<<"ClipBetweenSections: 1-5-6-2"<<G4endl; |
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227 | CalculateClippedPolygonExtent(polygon,pVoxelLimit,pAxis,pMin,pMax); |
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228 | polygon.clear(); |
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229 | |
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230 | polygon.push_back((*pVertices)[pSectionIndex+2]); |
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231 | polygon.push_back((*pVertices)[pSectionIndex+6]); |
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232 | polygon.push_back((*pVertices)[pSectionIndex+7]); |
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233 | polygon.push_back((*pVertices)[pSectionIndex+3]); |
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234 | // G4cout<<"ClipBetweenSections: 2-6-7-3"<<G4endl; |
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235 | CalculateClippedPolygonExtent(polygon,pVoxelLimit,pAxis,pMin,pMax); |
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236 | polygon.clear(); |
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237 | |
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238 | polygon.push_back((*pVertices)[pSectionIndex+3]); |
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239 | polygon.push_back((*pVertices)[pSectionIndex+7]); |
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240 | polygon.push_back((*pVertices)[pSectionIndex+4]); |
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241 | polygon.push_back((*pVertices)[pSectionIndex]); |
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242 | // G4cout<<"ClipBetweenSections: 3-7-4-0"<<G4endl; |
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243 | CalculateClippedPolygonExtent(polygon,pVoxelLimit,pAxis,pMin,pMax); |
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244 | return; |
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245 | } |
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246 | |
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247 | |
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248 | /////////////////////////////////////////////////////////////////////////////// |
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249 | // |
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250 | // Calculate the maximum and minimum extents of the convex polygon pPolygon |
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251 | // along the axis pAxis, within the limits pVoxelLimit |
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252 | // |
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253 | |
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254 | void |
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255 | G4VSolid::CalculateClippedPolygonExtent(G4ThreeVectorList& pPolygon, |
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256 | const G4VoxelLimits& pVoxelLimit, |
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257 | const EAxis pAxis, |
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258 | G4double& pMin, |
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259 | G4double& pMax) const |
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260 | { |
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261 | G4int noLeft,i; |
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262 | G4double component; |
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263 | /* |
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264 | G4cout<<G4endl; |
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265 | for(i = 0 ; i < pPolygon.size() ; i++ ) |
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266 | { |
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267 | G4cout << i << "\t" |
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268 | << "p.x = " << pPolygon[i].operator()(pAxis) << "\t" |
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269 | // << "p.y = " << pPolygon[i].y() << "\t" |
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270 | // << "p.z = " << pPolygon[i].z() << "\t" |
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271 | << G4endl; |
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272 | } |
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273 | G4cout<<G4endl; |
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274 | */ |
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275 | ClipPolygon(pPolygon,pVoxelLimit,pAxis); |
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276 | noLeft = pPolygon.size(); |
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277 | |
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278 | if ( noLeft ) |
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279 | { |
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280 | // G4cout<<G4endl; |
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281 | for (i=0;i<noLeft;i++) |
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282 | { |
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283 | component = pPolygon[i].operator()(pAxis); |
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284 | // G4cout <<i<<"\t"<<component<<G4endl; |
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285 | |
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286 | if (component < pMin) |
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287 | { |
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288 | // G4cout <<i<<"\t"<<"Pmin = "<<component<<G4endl; |
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289 | pMin = component; |
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290 | } |
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291 | if (component > pMax) |
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292 | { |
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293 | // G4cout <<i<<"\t"<<"PMax = "<<component<<G4endl; |
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294 | pMax = component; |
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295 | } |
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296 | } |
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297 | // G4cout<<G4endl; |
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298 | } |
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299 | // G4cout<<"pMin = "<<pMin<<"\t"<<"pMax = "<<pMax<<G4endl; |
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300 | } |
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301 | |
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302 | ///////////////////////////////////////////////////////////////////////////// |
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303 | // |
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304 | // Clip the convex polygon described by the vertices at |
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305 | // pSectionIndex ->pSectionIndex+3 within pVertices to the limits pVoxelLimit |
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306 | // |
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307 | // Set pMin to the smallest |
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308 | // |
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309 | // Calculate the extent of the polygon along pAxis, when clipped to the |
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310 | // limits pVoxelLimit. If the polygon exists after clippin, set pMin to |
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311 | // the polygon's minimum extent along the axis if <pMin, and set pMax to |
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312 | // the polygon's maximum extent along the axis if >pMax. |
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313 | // |
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314 | // The polygon is described by a set of vectors, where each vector represents |
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315 | // a vertex, so that the polygon is described by the vertex sequence: |
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316 | // 0th->1st 1st->2nd 2nd->... nth->0th |
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317 | // |
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318 | // Modifications to the polygon are made |
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319 | // |
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320 | // NOTE: Execessive copying during clipping |
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321 | |
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322 | void G4VSolid::ClipPolygon( G4ThreeVectorList& pPolygon, |
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323 | const G4VoxelLimits& pVoxelLimit, |
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324 | const EAxis ) const |
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325 | { |
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326 | G4ThreeVectorList outputPolygon; |
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327 | |
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328 | if ( pVoxelLimit.IsLimited() ) |
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329 | { |
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330 | if (pVoxelLimit.IsXLimited() ) // && pAxis != kXAxis) |
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331 | { |
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332 | G4VoxelLimits simpleLimit1; |
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333 | simpleLimit1.AddLimit(kXAxis,pVoxelLimit.GetMinXExtent(),kInfinity); |
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334 | // G4cout<<"MinXExtent()"<<G4endl; |
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335 | ClipPolygonToSimpleLimits(pPolygon,outputPolygon,simpleLimit1); |
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336 | |
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337 | pPolygon.clear(); |
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338 | |
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339 | if ( !outputPolygon.size() ) return; |
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340 | |
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341 | G4VoxelLimits simpleLimit2; |
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342 | // G4cout<<"MaxXExtent()"<<G4endl; |
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343 | simpleLimit2.AddLimit(kXAxis,-kInfinity,pVoxelLimit.GetMaxXExtent()); |
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344 | ClipPolygonToSimpleLimits(outputPolygon,pPolygon,simpleLimit2); |
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345 | |
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346 | if ( !pPolygon.size() ) return; |
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347 | else outputPolygon.clear(); |
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348 | } |
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349 | if ( pVoxelLimit.IsYLimited() ) // && pAxis != kYAxis) |
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350 | { |
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351 | G4VoxelLimits simpleLimit1; |
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352 | simpleLimit1.AddLimit(kYAxis,pVoxelLimit.GetMinYExtent(),kInfinity); |
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353 | ClipPolygonToSimpleLimits(pPolygon,outputPolygon,simpleLimit1); |
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354 | |
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355 | // Must always clear pPolygon - for clip to simpleLimit2 and in case of |
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356 | // early exit |
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357 | |
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358 | pPolygon.clear(); |
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359 | |
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360 | if ( !outputPolygon.size() ) return; |
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361 | |
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362 | G4VoxelLimits simpleLimit2; |
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363 | simpleLimit2.AddLimit(kYAxis,-kInfinity,pVoxelLimit.GetMaxYExtent()); |
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364 | ClipPolygonToSimpleLimits(outputPolygon,pPolygon,simpleLimit2); |
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365 | |
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366 | if ( !pPolygon.size() ) return; |
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367 | else outputPolygon.clear(); |
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368 | } |
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369 | if ( pVoxelLimit.IsZLimited() ) // && pAxis != kZAxis) |
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370 | { |
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371 | G4VoxelLimits simpleLimit1; |
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372 | simpleLimit1.AddLimit(kZAxis,pVoxelLimit.GetMinZExtent(),kInfinity); |
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373 | ClipPolygonToSimpleLimits(pPolygon,outputPolygon,simpleLimit1); |
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374 | |
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375 | // Must always clear pPolygon - for clip to simpleLimit2 and in case of |
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376 | // early exit |
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377 | |
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378 | pPolygon.clear(); |
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379 | |
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380 | if ( !outputPolygon.size() ) return; |
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381 | |
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382 | G4VoxelLimits simpleLimit2; |
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383 | simpleLimit2.AddLimit(kZAxis,-kInfinity,pVoxelLimit.GetMaxZExtent()); |
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384 | ClipPolygonToSimpleLimits(outputPolygon,pPolygon,simpleLimit2); |
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385 | |
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386 | // Return after final clip - no cleanup |
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387 | } |
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388 | } |
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389 | } |
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390 | |
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391 | //////////////////////////////////////////////////////////////////////////// |
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392 | // |
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393 | // pVoxelLimits must be only limited along one axis, and either the maximum |
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394 | // along the axis must be +kInfinity, or the minimum -kInfinity |
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395 | |
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396 | void |
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397 | G4VSolid::ClipPolygonToSimpleLimits( G4ThreeVectorList& pPolygon, |
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398 | G4ThreeVectorList& outputPolygon, |
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399 | const G4VoxelLimits& pVoxelLimit ) const |
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400 | { |
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401 | G4int i; |
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402 | G4int noVertices=pPolygon.size(); |
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403 | G4ThreeVector vEnd,vStart; |
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404 | |
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405 | for (i = 0 ; i < noVertices ; i++ ) |
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406 | { |
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407 | vStart = pPolygon[i]; |
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408 | // G4cout << "i = " << i << G4endl; |
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409 | if ( i == noVertices-1 ) vEnd = pPolygon[0]; |
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410 | else vEnd = pPolygon[i+1]; |
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411 | |
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412 | if ( pVoxelLimit.Inside(vStart) ) |
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413 | { |
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414 | if (pVoxelLimit.Inside(vEnd)) |
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415 | { |
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416 | // vStart and vEnd inside -> output end point |
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417 | // |
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418 | outputPolygon.push_back(vEnd); |
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419 | } |
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420 | else |
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421 | { |
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422 | // vStart inside, vEnd outside -> output crossing point |
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423 | // |
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424 | // G4cout << "vStart inside, vEnd outside" << G4endl; |
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425 | pVoxelLimit.ClipToLimits(vStart,vEnd); |
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426 | outputPolygon.push_back(vEnd); |
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427 | } |
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428 | } |
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429 | else |
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430 | { |
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431 | if (pVoxelLimit.Inside(vEnd)) |
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432 | { |
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433 | // vStart outside, vEnd inside -> output inside section |
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434 | // |
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435 | // G4cout << "vStart outside, vEnd inside" << G4endl; |
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436 | pVoxelLimit.ClipToLimits(vStart,vEnd); |
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437 | outputPolygon.push_back(vStart); |
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438 | outputPolygon.push_back(vEnd); |
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439 | } |
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440 | else // Both point outside -> no output |
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441 | { |
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442 | // outputPolygon.push_back(vStart); |
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443 | // outputPolygon.push_back(vEnd); |
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444 | } |
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445 | } |
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446 | } |
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447 | } |
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448 | |
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449 | const G4VSolid* G4VSolid::GetConstituentSolid(G4int) const |
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450 | { return 0; } |
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451 | |
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452 | G4VSolid* G4VSolid::GetConstituentSolid(G4int) |
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453 | { return 0; } |
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454 | |
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455 | const G4DisplacedSolid* G4VSolid::GetDisplacedSolidPtr() const |
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456 | { return 0; } |
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457 | |
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458 | G4DisplacedSolid* G4VSolid::GetDisplacedSolidPtr() |
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459 | { return 0; } |
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460 | |
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461 | G4VisExtent G4VSolid::GetExtent () const |
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462 | { |
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463 | G4VisExtent extent; |
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464 | G4VoxelLimits voxelLimits; // Defaults to "infinite" limits. |
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465 | G4AffineTransform affineTransform; |
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466 | G4double vmin, vmax; |
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467 | CalculateExtent(kXAxis,voxelLimits,affineTransform,vmin,vmax); |
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468 | extent.SetXmin (vmin); |
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469 | extent.SetXmax (vmax); |
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470 | CalculateExtent(kYAxis,voxelLimits,affineTransform,vmin,vmax); |
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471 | extent.SetYmin (vmin); |
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472 | extent.SetYmax (vmax); |
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473 | CalculateExtent(kZAxis,voxelLimits,affineTransform,vmin,vmax); |
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474 | extent.SetZmin (vmin); |
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475 | extent.SetZmax (vmax); |
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476 | return extent; |
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477 | } |
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478 | |
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479 | G4Polyhedron* G4VSolid::CreatePolyhedron () const |
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480 | { |
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481 | return 0; |
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482 | } |
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483 | |
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484 | G4NURBS* G4VSolid::CreateNURBS () const |
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485 | { |
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486 | return 0; |
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487 | } |
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488 | |
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489 | G4Polyhedron* G4VSolid::GetPolyhedron () const |
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490 | { |
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491 | return 0; |
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492 | } |
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493 | |
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494 | //////////////////////////////////////////////////////////////// |
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495 | // |
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496 | // Returns an estimation of the solid volume in internal units. |
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497 | // The number of statistics and error accuracy is fixed. |
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498 | // This method may be overloaded by derived classes to compute the |
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499 | // exact geometrical quantity for solids where this is possible. |
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500 | // or anyway to cache the computed value. |
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501 | // This implementation does NOT cache the computed value. |
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502 | |
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503 | G4double G4VSolid::GetCubicVolume() |
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504 | { |
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505 | G4int cubVolStatistics = 1000000; |
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506 | G4double cubVolEpsilon = 0.001; |
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507 | return EstimateCubicVolume(cubVolStatistics, cubVolEpsilon); |
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508 | } |
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509 | |
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510 | //////////////////////////////////////////////////////////////// |
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511 | // |
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512 | // Calculate cubic volume based on Inside() method. |
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513 | // Accuracy is limited by the second argument or the statistics |
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514 | // expressed by the first argument. |
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515 | // Implementation is courtesy of Vasiliki Despoina Mitsou, |
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516 | // University of Athens. |
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517 | |
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518 | G4double G4VSolid::EstimateCubicVolume(G4int nStat, G4double epsilon) const |
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519 | { |
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520 | G4int iInside=0; |
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521 | G4double px,py,pz,minX,maxX,minY,maxY,minZ,maxZ,volume; |
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522 | G4bool yesno; |
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523 | G4ThreeVector p; |
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524 | EInside in; |
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525 | |
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526 | // values needed for CalculateExtent signature |
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527 | |
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528 | G4VoxelLimits limit; // Unlimited |
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529 | G4AffineTransform origin; |
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530 | |
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531 | // min max extents of pSolid along X,Y,Z |
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532 | |
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533 | yesno = this->CalculateExtent(kXAxis,limit,origin,minX,maxX); |
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534 | yesno = this->CalculateExtent(kYAxis,limit,origin,minY,maxY); |
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535 | yesno = this->CalculateExtent(kZAxis,limit,origin,minZ,maxZ); |
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536 | |
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537 | // limits |
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538 | |
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539 | if(nStat < 100) nStat = 100; |
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540 | if(epsilon > 0.01) epsilon = 0.01; |
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541 | |
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542 | for(G4int i = 0; i < nStat; i++ ) |
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543 | { |
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544 | px = minX+(maxX-minX)*G4UniformRand(); |
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545 | py = minY+(maxY-minY)*G4UniformRand(); |
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546 | pz = minZ+(maxZ-minZ)*G4UniformRand(); |
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547 | p = G4ThreeVector(px,py,pz); |
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548 | in = this->Inside(p); |
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549 | if(in != kOutside) iInside++; |
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550 | } |
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551 | volume = (maxX-minX)*(maxY-minY)*(maxZ-minZ)*iInside/nStat; |
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552 | return volume; |
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553 | } |
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554 | |
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555 | //////////////////////////////////////////////////////////////// |
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556 | // |
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557 | // Returns an estimation of the solid surface area in internal units. |
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558 | // The number of statistics and error accuracy is fixed. |
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559 | // This method may be overloaded by derived classes to compute the |
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560 | // exact geometrical quantity for solids where this is possible. |
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561 | // or anyway to cache the computed value. |
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562 | // This implementation does NOT cache the computed value. |
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563 | |
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564 | G4double G4VSolid::GetSurfaceArea() |
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565 | { |
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566 | G4int stat = 1000000; |
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567 | G4double ell = -1.; |
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568 | return EstimateSurfaceArea(stat,ell); |
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569 | } |
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570 | |
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571 | //////////////////////////////////////////////////////////////// |
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572 | // |
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573 | // Estimate surface area based on Inside(), DistanceToIn(), and |
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574 | // DistanceToOut() methods. Accuracy is limited by the statistics |
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575 | // defined by the first argument. Implemented by Mikhail Kosov. |
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576 | |
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577 | G4double G4VSolid::EstimateSurfaceArea(G4int nStat, G4double ell) const |
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578 | { |
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579 | G4int inside=0; |
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580 | G4double px,py,pz,minX,maxX,minY,maxY,minZ,maxZ,surf; |
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581 | G4bool yesno; |
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582 | G4ThreeVector p; |
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583 | EInside in; |
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584 | |
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585 | // values needed for CalculateExtent signature |
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586 | |
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587 | G4VoxelLimits limit; // Unlimited |
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588 | G4AffineTransform origin; |
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589 | |
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590 | // min max extents of pSolid along X,Y,Z |
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591 | |
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592 | yesno = this->CalculateExtent(kXAxis,limit,origin,minX,maxX); |
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593 | yesno = this->CalculateExtent(kYAxis,limit,origin,minY,maxY); |
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594 | yesno = this->CalculateExtent(kZAxis,limit,origin,minZ,maxZ); |
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595 | |
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596 | // limits |
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597 | |
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598 | if(nStat < 100) { nStat = 100; } |
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599 | |
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600 | G4double dX=maxX-minX; |
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601 | G4double dY=maxY-minY; |
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602 | G4double dZ=maxZ-minZ; |
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603 | if(ell<=0.) // Automatic definition of skin thickness |
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604 | { |
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605 | G4double minval=dX; |
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606 | if(dY<dX) { minval=dY; } |
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607 | if(dZ<minval) { minval=dZ; } |
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608 | ell=.01*minval; |
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609 | } |
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610 | |
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611 | G4double dd=2*ell; |
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612 | minX-=ell; minY-=ell; minZ-=ell; dX+=dd; dY+=dd; dZ+=dd; |
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613 | |
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614 | for(G4int i = 0; i < nStat; i++ ) |
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615 | { |
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616 | px = minX+dX*G4UniformRand(); |
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617 | py = minY+dY*G4UniformRand(); |
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618 | pz = minZ+dZ*G4UniformRand(); |
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619 | p = G4ThreeVector(px,py,pz); |
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620 | in = this->Inside(p); |
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621 | if(in != kOutside) |
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622 | { |
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623 | if (DistanceToOut(p)<ell) { inside++; } |
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624 | } |
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625 | else if(DistanceToIn(p)<ell) { inside++; } |
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626 | } |
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627 | // @@ The conformal correction can be upgraded |
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628 | surf = dX*dY*dZ*inside/dd/nStat; |
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629 | return surf; |
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630 | } |
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