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: G4ExtrudedSolid.cc,v 1.18 2008/10/30 11:47:45 ivana Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
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29 | // |
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30 | // |
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31 | // -------------------------------------------------------------------- |
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32 | // GEANT 4 class source file |
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33 | // |
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34 | // G4ExtrudedSolid.cc |
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35 | // |
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36 | // Author: Ivana Hrivnacova, IPN Orsay |
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37 | // -------------------------------------------------------------------- |
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38 | |
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39 | #include <set> |
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40 | #include <algorithm> |
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41 | #include <cmath> |
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42 | |
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43 | #include "G4ExtrudedSolid.hh" |
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44 | #include "G4TriangularFacet.hh" |
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45 | #include "G4QuadrangularFacet.hh" |
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46 | |
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47 | //_____________________________________________________________________________ |
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48 | |
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49 | G4ExtrudedSolid::G4ExtrudedSolid( const G4String& pName, |
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50 | std::vector<G4TwoVector> polygon, |
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51 | std::vector<ZSection> zsections) |
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52 | : G4TessellatedSolid(pName), |
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53 | fNv(polygon.size()), |
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54 | fNz(zsections.size()), |
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55 | fPolygon(), |
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56 | fZSections(), |
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57 | fTriangles(), |
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58 | fIsConvex(false), |
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59 | fGeometryType("G4ExtrudedSolid") |
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60 | |
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61 | { |
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62 | // General constructor |
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63 | |
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64 | G4String errorDescription = "InvalidSetup in \""; |
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65 | errorDescription += pName; |
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66 | errorDescription += "\""; |
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67 | |
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68 | // First check input parameters |
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69 | |
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70 | if ( fNv < 3 ) |
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71 | { |
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72 | G4Exception("G4ExtrudedSolid::G4ExtrudedSolid()", errorDescription, |
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73 | FatalException, "Number of polygon vertices < 3"); |
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74 | } |
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75 | |
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76 | if ( fNz < 2 ) |
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77 | { |
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78 | G4Exception("G4ExtrudedSolid::G4ExtrudedSolid()", errorDescription, |
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79 | FatalException, "Number of z-sides < 2"); |
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80 | } |
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81 | |
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82 | for ( G4int i=0; i<fNz-1; ++i ) |
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83 | { |
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84 | if ( zsections[i].fZ > zsections[i+1].fZ ) |
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85 | { |
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86 | G4Exception("G4ExtrudedSolid::G4ExtrudedSolid()", errorDescription, |
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87 | FatalException, |
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88 | "Z-sections have to be ordered by z value (z0 < z1 < z2 ...)"); |
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89 | } |
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90 | if ( std::fabs( zsections[i+1].fZ - zsections[i].fZ ) < kCarTolerance * 0.5 ) |
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91 | { |
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92 | G4Exception("G4ExtrudedSolid::G4ExtrudedSolid()", errorDescription, |
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93 | FatalException, |
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94 | "Z-sections with the same z position are not supported."); |
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95 | } |
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96 | } |
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97 | |
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98 | // Copy polygon |
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99 | // |
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100 | for ( G4int i=0; i<fNv; ++i ) { fPolygon.push_back(polygon[i]); } |
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101 | |
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102 | // Copy z-sections |
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103 | // |
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104 | for ( G4int i=0; i<fNz; ++i ) { fZSections.push_back(zsections[i]); } |
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105 | |
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106 | |
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107 | G4bool result = MakeFacets(); |
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108 | if (!result) |
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109 | { |
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110 | G4Exception("G4ExtrudedSolid::G4ExtrudedSolid()", errorDescription, |
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111 | FatalException, "Making facets failed."); |
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112 | } |
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113 | fIsConvex = IsConvex(); |
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114 | |
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115 | |
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116 | ComputeProjectionParameters(); |
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117 | } |
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118 | |
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119 | //_____________________________________________________________________________ |
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120 | |
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121 | G4ExtrudedSolid::G4ExtrudedSolid( const G4String& pName, |
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122 | std::vector<G4TwoVector> polygon, |
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123 | G4double dz, |
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124 | G4TwoVector off1, G4double scale1, |
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125 | G4TwoVector off2, G4double scale2 ) |
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126 | : G4TessellatedSolid(pName), |
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127 | fNv(polygon.size()), |
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128 | fNz(2), |
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129 | fPolygon(), |
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130 | fZSections(), |
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131 | fTriangles(), |
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132 | fIsConvex(false), |
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133 | fGeometryType("G4ExtrudedSolid") |
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134 | |
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135 | { |
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136 | // Special constructor for solid with 2 z-sections |
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137 | |
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138 | G4String errorDescription = "InvalidSetup in \""; |
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139 | errorDescription += pName; |
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140 | errorDescription += "\""; |
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141 | |
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142 | // First check input parameters |
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143 | // |
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144 | if ( fNv < 3 ) |
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145 | { |
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146 | G4Exception("G4ExtrudedSolid::G4ExtrudedSolid()", errorDescription, |
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147 | FatalException, "Number of polygon vertices < 3"); |
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148 | } |
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149 | |
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150 | // Copy polygon |
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151 | // |
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152 | for ( G4int i=0; i<fNv; ++i ) { fPolygon.push_back(polygon[i]); } |
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153 | |
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154 | // Copy z-sections |
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155 | // |
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156 | fZSections.push_back(ZSection(-dz, off1, scale1)); |
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157 | fZSections.push_back(ZSection( dz, off2, scale2)); |
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158 | |
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159 | G4bool result = MakeFacets(); |
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160 | if (!result) |
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161 | { |
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162 | G4Exception("G4ExtrudedSolid::G4ExtrudedSolid()", errorDescription, |
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163 | FatalException, "Making facets failed."); |
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164 | } |
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165 | fIsConvex = IsConvex(); |
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166 | |
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167 | ComputeProjectionParameters(); |
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168 | } |
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169 | |
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170 | //_____________________________________________________________________________ |
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171 | |
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172 | G4ExtrudedSolid::G4ExtrudedSolid( __void__& a ) |
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173 | : G4TessellatedSolid(a) |
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174 | { |
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175 | // Fake default constructor - sets only member data and allocates memory |
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176 | // for usage restricted to object persistency. |
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177 | } |
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178 | |
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179 | |
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180 | //_____________________________________________________________________________ |
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181 | |
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182 | G4ExtrudedSolid::~G4ExtrudedSolid() |
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183 | { |
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184 | // Destructor |
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185 | } |
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186 | |
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187 | //_____________________________________________________________________________ |
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188 | |
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189 | void G4ExtrudedSolid::ComputeProjectionParameters() |
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190 | { |
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191 | // Compute parameters for point projections p(z) |
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192 | // to the polygon scale & offset: |
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193 | // scale(z) = k*z + scale0 |
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194 | // offset(z) = l*z + offset0 |
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195 | // p(z) = scale(z)*p0 + offset(z) |
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196 | // p0 = (p(z) - offset(z))/scale(z); |
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197 | // |
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198 | |
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199 | for ( G4int iz=0; iz<fNz-1; ++iz) |
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200 | { |
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201 | G4double z1 = fZSections[iz].fZ; |
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202 | G4double z2 = fZSections[iz+1].fZ; |
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203 | G4double scale1 = fZSections[iz].fScale; |
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204 | G4double scale2 = fZSections[iz+1].fScale; |
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205 | G4TwoVector off1 = fZSections[iz].fOffset; |
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206 | G4TwoVector off2 = fZSections[iz+1].fOffset; |
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207 | |
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208 | G4double kscale = (scale2 - scale1)/(z2 - z1); |
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209 | G4double scale0 = scale2 - kscale*(z2 - z1)/2.0; |
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210 | G4TwoVector koff = (off2 - off1)/(z2 - z1); |
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211 | G4TwoVector off0 = off2 - koff*(z2 - z1)/2.0; |
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212 | |
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213 | fKScales.push_back(kscale); |
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214 | fScale0s.push_back(scale0); |
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215 | fKOffsets.push_back(koff); |
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216 | fOffset0s.push_back(off0); |
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217 | } |
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218 | } |
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219 | |
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220 | |
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221 | //_____________________________________________________________________________ |
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222 | |
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223 | G4ThreeVector G4ExtrudedSolid::GetVertex(G4int iz, G4int ind) const |
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224 | { |
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225 | // Shift and scale vertices |
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226 | |
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227 | return G4ThreeVector( fPolygon[ind].x() * fZSections[iz].fScale |
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228 | + fZSections[iz].fOffset.x(), |
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229 | fPolygon[ind].y() * fZSections[iz].fScale |
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230 | + fZSections[iz].fOffset.y(), fZSections[iz].fZ); |
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231 | } |
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232 | |
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233 | //_____________________________________________________________________________ |
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234 | |
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235 | |
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236 | G4TwoVector G4ExtrudedSolid::ProjectPoint(const G4ThreeVector& point) const |
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237 | { |
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238 | // Project point in the polygon scale |
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239 | // scale(z) = k*z + scale0 |
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240 | // offset(z) = l*z + offset0 |
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241 | // p(z) = scale(z)*p0 + offset(z) |
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242 | // p0 = (p(z) - offset(z))/scale(z); |
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243 | |
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244 | // Select projection (z-segment of the solid) according to p.z() |
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245 | // |
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246 | G4int iz = 0; |
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247 | while ( point.z() > fZSections[iz+1].fZ && iz < fNz-2 ) { ++iz; } |
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248 | |
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249 | G4double z0 = ( fZSections[iz+1].fZ + fZSections[iz].fZ )/2.0; |
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250 | G4TwoVector p2(point.x(), point.y()); |
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251 | G4double pscale = fKScales[iz]*(point.z()-z0) + fScale0s[iz]; |
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252 | G4TwoVector poffset = fKOffsets[iz]*(point.z()-z0) + fOffset0s[iz]; |
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253 | |
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254 | // G4cout << point << " projected to " |
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255 | // << iz << "-th z-segment polygon as " |
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256 | // << (p2 - poffset)/pscale << G4endl; |
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257 | |
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258 | // pscale is always >0 as it is an interpolation between two |
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259 | // positive scale values |
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260 | // |
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261 | return (p2 - poffset)/pscale; |
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262 | } |
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263 | |
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264 | //_____________________________________________________________________________ |
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265 | |
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266 | G4bool G4ExtrudedSolid::IsSameLine(G4TwoVector p, |
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267 | G4TwoVector l1, G4TwoVector l2) const |
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268 | { |
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269 | // Return true if p is on the line through l1, l2 |
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270 | |
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271 | if ( l1.x() == l2.x() ) |
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272 | { |
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273 | return std::fabs(p.x() - l1.x()) < kCarTolerance * 0.5; |
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274 | } |
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275 | |
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276 | return std::fabs (p.y() - l1.y() - ((l2.y() - l1.y())/(l2.x() - l1.x())) |
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277 | *(p.x() - l1.x())) < kCarTolerance * 0.5; |
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278 | } |
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279 | |
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280 | //_____________________________________________________________________________ |
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281 | |
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282 | G4bool G4ExtrudedSolid::IsSameLineSegment(G4TwoVector p, |
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283 | G4TwoVector l1, G4TwoVector l2) const |
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284 | { |
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285 | // Return true if p is on the line through l1, l2 and lies between |
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286 | // l1 and l2 |
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287 | |
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288 | if ( p.x() < std::min(l1.x(), l2.x()) - kCarTolerance * 0.5 || |
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289 | p.x() > std::max(l1.x(), l2.x()) + kCarTolerance * 0.5 || |
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290 | p.y() < std::min(l1.y(), l2.y()) - kCarTolerance * 0.5 || |
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291 | p.y() > std::max(l1.y(), l2.y()) + kCarTolerance * 0.5 ) |
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292 | { |
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293 | return false; |
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294 | } |
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295 | |
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296 | return IsSameLine(p, l1, l2); |
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297 | } |
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298 | |
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299 | //_____________________________________________________________________________ |
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300 | |
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301 | G4bool G4ExtrudedSolid::IsSameSide(G4TwoVector p1, G4TwoVector p2, |
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302 | G4TwoVector l1, G4TwoVector l2) const |
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303 | { |
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304 | // Return true if p1 and p2 are on the same side of the line through l1, l2 |
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305 | |
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306 | return ( (p1.x() - l1.x()) * (l2.y() - l1.y()) |
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307 | - (l2.x() - l1.x()) * (p1.y() - l1.y()) ) |
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308 | * ( (p2.x() - l1.x()) * (l2.y() - l1.y()) |
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309 | - (l2.x() - l1.x()) * (p2.y() - l1.y()) ) > 0; |
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310 | } |
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311 | |
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312 | //_____________________________________________________________________________ |
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313 | |
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314 | G4bool G4ExtrudedSolid::IsPointInside(G4TwoVector a, G4TwoVector b, |
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315 | G4TwoVector c, G4TwoVector p) const |
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316 | { |
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317 | // Return true if p is inside of triangle abc or on its edges, |
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318 | // else returns false |
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319 | |
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320 | // Check extent first |
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321 | // |
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322 | if ( ( p.x() < a.x() && p.x() < b.x() && p.x() < c.x() ) || |
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323 | ( p.x() > a.x() && p.x() > b.x() && p.x() > c.x() ) || |
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324 | ( p.y() < a.y() && p.y() < b.y() && p.y() < c.y() ) || |
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325 | ( p.y() > a.y() && p.y() > b.y() && p.y() > c.y() ) ) return false; |
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326 | |
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327 | G4bool inside |
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328 | = IsSameSide(p, a, b, c) |
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329 | && IsSameSide(p, b, a, c) |
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330 | && IsSameSide(p, c, a, b); |
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331 | |
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332 | G4bool onEdge |
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333 | = IsSameLineSegment(p, a, b) |
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334 | || IsSameLineSegment(p, b, c) |
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335 | || IsSameLineSegment(p, c, a); |
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336 | |
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337 | return inside || onEdge; |
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338 | } |
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339 | |
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340 | //_____________________________________________________________________________ |
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341 | |
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342 | G4double |
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343 | G4ExtrudedSolid::GetAngle(G4TwoVector po, G4TwoVector pa, G4TwoVector pb) const |
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344 | { |
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345 | // Return the angle of the vertex in po |
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346 | |
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347 | G4TwoVector t1 = pa - po; |
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348 | G4TwoVector t2 = pb - po; |
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349 | |
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350 | G4double result = (std::atan2(t1.y(), t1.x()) - std::atan2(t2.y(), t2.x())); |
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351 | |
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352 | if ( result < 0 ) result += 2*pi; |
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353 | |
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354 | return result; |
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355 | } |
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356 | |
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357 | //_____________________________________________________________________________ |
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358 | |
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359 | G4VFacet* |
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360 | G4ExtrudedSolid::MakeDownFacet(G4int ind1, G4int ind2, G4int ind3) const |
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361 | { |
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362 | // Create a triangular facet from the polygon points given by indices |
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363 | // forming the down side ( the normal goes in -z) |
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364 | |
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365 | std::vector<G4ThreeVector> vertices; |
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366 | vertices.push_back(GetVertex(0, ind1)); |
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367 | vertices.push_back(GetVertex(0, ind2)); |
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368 | vertices.push_back(GetVertex(0, ind3)); |
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369 | |
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370 | // first vertex most left |
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371 | // |
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372 | G4ThreeVector cross |
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373 | = (vertices[1]-vertices[0]).cross(vertices[2]-vertices[1]); |
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374 | |
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375 | if ( cross.z() > 0.0 ) |
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376 | { |
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377 | // vertices ardered clock wise has to be reordered |
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378 | |
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379 | // G4cout << "G4ExtrudedSolid::MakeDownFacet: reordering vertices " |
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380 | // << ind1 << ", " << ind2 << ", " << ind3 << G4endl; |
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381 | |
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382 | G4ThreeVector tmp = vertices[1]; |
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383 | vertices[1] = vertices[2]; |
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384 | vertices[2] = tmp; |
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385 | } |
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386 | |
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387 | return new G4TriangularFacet(vertices[0], vertices[1], |
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388 | vertices[2], ABSOLUTE); |
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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 | G4VFacet* |
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394 | G4ExtrudedSolid::MakeUpFacet(G4int ind1, G4int ind2, G4int ind3) const |
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395 | { |
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396 | // Creates a triangular facet from the polygon points given by indices |
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397 | // forming the upper side ( z>0 ) |
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398 | |
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399 | std::vector<G4ThreeVector> vertices; |
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400 | vertices.push_back(GetVertex(fNz-1, ind1)); |
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401 | vertices.push_back(GetVertex(fNz-1, ind2)); |
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402 | vertices.push_back(GetVertex(fNz-1, ind3)); |
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403 | |
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404 | // first vertex most left |
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405 | // |
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406 | G4ThreeVector cross |
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407 | = (vertices[1]-vertices[0]).cross(vertices[2]-vertices[1]); |
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408 | |
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409 | if ( cross.z() < 0.0 ) |
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410 | { |
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411 | // vertices ordered clock wise has to be reordered |
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412 | |
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413 | // G4cout << "G4ExtrudedSolid::MakeUpFacet: reordering vertices " |
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414 | // << ind1 << ", " << ind2 << ", " << ind3 << G4endl; |
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415 | |
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416 | G4ThreeVector tmp = vertices[1]; |
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417 | vertices[1] = vertices[2]; |
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418 | vertices[2] = tmp; |
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419 | } |
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420 | |
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421 | return new G4TriangularFacet(vertices[0], vertices[1], |
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422 | vertices[2], ABSOLUTE); |
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423 | } |
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424 | |
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425 | //_____________________________________________________________________________ |
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426 | |
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427 | G4bool G4ExtrudedSolid::AddGeneralPolygonFacets() |
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428 | { |
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429 | // Decompose polygonal sides in triangular facets |
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430 | |
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431 | typedef std::pair < G4TwoVector, G4int > Vertex; |
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432 | |
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433 | // Fill one more vector |
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434 | // |
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435 | std::vector< Vertex > verticesToBeDone; |
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436 | for ( G4int i=0; i<fNv; ++i ) |
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437 | { |
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438 | verticesToBeDone.push_back(Vertex(fPolygon[i], i)); |
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439 | } |
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440 | std::vector< Vertex > ears; |
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441 | |
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442 | std::vector< Vertex >::iterator c1 = verticesToBeDone.begin(); |
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443 | std::vector< Vertex >::iterator c2 = c1+1; |
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444 | std::vector< Vertex >::iterator c3 = c1+2; |
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445 | while ( verticesToBeDone.size()>2 ) |
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446 | { |
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447 | |
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448 | // G4cout << "Looking at triangle : " |
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449 | // << c1->second << " " << c2->second |
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450 | // << " " << c3->second << G4endl; |
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451 | |
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452 | // skip concave vertices |
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453 | // |
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454 | G4double angle = GetAngle(c2->first, c3->first, c1->first); |
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455 | |
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456 | if ( angle > pi ) |
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457 | { |
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458 | // G4cout << "Skipping concave vertex " << c2->second << G4endl; |
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459 | |
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460 | // try next three consecutive vertices |
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461 | // |
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462 | c1 = c2; |
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463 | c2 = c3; |
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464 | ++c3; |
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465 | if ( c3 == verticesToBeDone.end() ) { c3 = verticesToBeDone.begin(); } |
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466 | |
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467 | // G4cout << "Looking at triangle : " |
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468 | // << c1->second << " " << c2->second |
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469 | // << " " << c3->second << G4endl; |
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470 | |
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471 | } |
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472 | |
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473 | G4bool good = true; |
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474 | std::vector< Vertex >::iterator it; |
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475 | for ( it=verticesToBeDone.begin(); it != verticesToBeDone.end(); ++it ) |
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476 | { |
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477 | // skip vertices of tested triangle |
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478 | // |
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479 | if ( it == c1 || it == c2 || it == c3 ) { continue; } |
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480 | |
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481 | if ( IsPointInside(c1->first, c2->first, c3->first, it->first) ) |
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482 | { |
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483 | // G4cout << "Point " << it->second << " is inside" << G4endl; |
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484 | good = false; |
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485 | |
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486 | // try next three consecutive vertices |
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487 | // |
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488 | c1 = c2; |
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489 | c2 = c3; |
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490 | ++c3; |
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491 | if ( c3 == verticesToBeDone.end() ) { c3 = verticesToBeDone.begin(); } |
---|
492 | break; |
---|
493 | } |
---|
494 | // else |
---|
495 | // { G4cout << "Point " << it->second << " is outside" << G4endl; } |
---|
496 | } |
---|
497 | if ( good ) |
---|
498 | { |
---|
499 | // all points are outside triangle, we can make a facet |
---|
500 | |
---|
501 | // G4cout << "Found triangle : " |
---|
502 | // << c1->second << " " << c2->second |
---|
503 | // << " " << c3->second << G4endl; |
---|
504 | |
---|
505 | G4bool result; |
---|
506 | result = AddFacet( MakeDownFacet(c1->second, c2->second, c3->second) ); |
---|
507 | if ( ! result ) { return false; } |
---|
508 | |
---|
509 | result = AddFacet( MakeUpFacet(c1->second, c2->second, c3->second) ); |
---|
510 | if ( ! result ) { return false; } |
---|
511 | |
---|
512 | std::vector<G4int> triangle(3); |
---|
513 | triangle[0] = c1->second; |
---|
514 | triangle[1] = c2->second; |
---|
515 | triangle[2] = c3->second; |
---|
516 | fTriangles.push_back(triangle); |
---|
517 | |
---|
518 | // remove the ear point from verticesToBeDone |
---|
519 | // |
---|
520 | verticesToBeDone.erase(c2); |
---|
521 | c1 = verticesToBeDone.begin(); |
---|
522 | c2 = c1+1; |
---|
523 | c3 = c1+2; |
---|
524 | } |
---|
525 | } |
---|
526 | return true; |
---|
527 | } |
---|
528 | |
---|
529 | //_____________________________________________________________________________ |
---|
530 | |
---|
531 | G4bool G4ExtrudedSolid::MakeFacets() |
---|
532 | { |
---|
533 | // Define facets |
---|
534 | |
---|
535 | G4bool good; |
---|
536 | |
---|
537 | // Decomposition of polygonal sides in the facets |
---|
538 | // |
---|
539 | if ( fNv == 3 ) |
---|
540 | { |
---|
541 | good = AddFacet( new G4TriangularFacet( GetVertex(0, 0), GetVertex(0, 1), |
---|
542 | GetVertex(0, 2), ABSOLUTE) ); |
---|
543 | if ( ! good ) { return false; } |
---|
544 | |
---|
545 | good = AddFacet( new G4TriangularFacet( GetVertex(fNz-1, 2), GetVertex(fNz-1, 1), |
---|
546 | GetVertex(fNz-1, 0), ABSOLUTE) ); |
---|
547 | if ( ! good ) { return false; } |
---|
548 | |
---|
549 | std::vector<G4int> triangle(3); |
---|
550 | triangle[0] = 0; |
---|
551 | triangle[1] = 1; |
---|
552 | triangle[2] = 2; |
---|
553 | fTriangles.push_back(triangle); |
---|
554 | } |
---|
555 | |
---|
556 | else if ( fNv == 4 ) |
---|
557 | { |
---|
558 | good = AddFacet( new G4QuadrangularFacet( GetVertex(0, 0),GetVertex(0, 1), |
---|
559 | GetVertex(0, 2),GetVertex(0, 3), |
---|
560 | ABSOLUTE) ); |
---|
561 | if ( ! good ) { return false; } |
---|
562 | |
---|
563 | good = AddFacet( new G4QuadrangularFacet( GetVertex(fNz-1, 3), GetVertex(fNz-1, 2), |
---|
564 | GetVertex(fNz-1, 1), GetVertex(fNz-1, 0), |
---|
565 | ABSOLUTE) ); |
---|
566 | if ( ! good ) { return false; } |
---|
567 | |
---|
568 | std::vector<G4int> triangle1(3); |
---|
569 | triangle1[0] = 0; |
---|
570 | triangle1[1] = 1; |
---|
571 | triangle1[2] = 2; |
---|
572 | fTriangles.push_back(triangle1); |
---|
573 | |
---|
574 | std::vector<G4int> triangle2(3); |
---|
575 | triangle2[0] = 0; |
---|
576 | triangle2[1] = 2; |
---|
577 | triangle2[2] = 3; |
---|
578 | fTriangles.push_back(triangle2); |
---|
579 | } |
---|
580 | else |
---|
581 | { |
---|
582 | good = AddGeneralPolygonFacets(); |
---|
583 | if ( ! good ) { return false; } |
---|
584 | } |
---|
585 | |
---|
586 | // The quadrangular sides |
---|
587 | // |
---|
588 | for ( G4int iz = 0; iz < fNz-1; ++iz ) |
---|
589 | { |
---|
590 | for ( G4int i = 0; i < fNv; ++i ) |
---|
591 | { |
---|
592 | G4int j = (i+1) % fNv; |
---|
593 | good = AddFacet( new G4QuadrangularFacet |
---|
594 | ( GetVertex(iz, j), GetVertex(iz, i), |
---|
595 | GetVertex(iz+1, i), GetVertex(iz+1, j), ABSOLUTE) ); |
---|
596 | if ( ! good ) { return false; } |
---|
597 | } |
---|
598 | } |
---|
599 | |
---|
600 | SetSolidClosed(true); |
---|
601 | |
---|
602 | return good; |
---|
603 | } |
---|
604 | |
---|
605 | //_____________________________________________________________________________ |
---|
606 | |
---|
607 | G4bool G4ExtrudedSolid::IsConvex() const |
---|
608 | { |
---|
609 | // Get polygon convexity (polygon is convex if all vertex angles are < pi ) |
---|
610 | |
---|
611 | for ( G4int i=0; i< fNv; ++i ) |
---|
612 | { |
---|
613 | G4int j = ( i + 1 ) % fNv; |
---|
614 | G4int k = ( i + 2 ) % fNv; |
---|
615 | G4TwoVector v1 = fPolygon[i]-fPolygon[j]; |
---|
616 | G4TwoVector v2 = fPolygon[k]-fPolygon[j]; |
---|
617 | G4double dphi = v2.phi() - v1.phi(); |
---|
618 | if ( dphi < 0. ) { dphi += 2.*pi; } |
---|
619 | |
---|
620 | if ( dphi >= pi ) { return false; } |
---|
621 | } |
---|
622 | |
---|
623 | return true; |
---|
624 | } |
---|
625 | |
---|
626 | //_____________________________________________________________________________ |
---|
627 | |
---|
628 | G4GeometryType G4ExtrudedSolid::GetEntityType () const |
---|
629 | { |
---|
630 | // Return entity type |
---|
631 | |
---|
632 | return fGeometryType; |
---|
633 | } |
---|
634 | |
---|
635 | //_____________________________________________________________________________ |
---|
636 | |
---|
637 | EInside G4ExtrudedSolid::Inside (const G4ThreeVector &p) const |
---|
638 | { |
---|
639 | // Override the base class function as it fails in case of concave polygon. |
---|
640 | // Project the point in the original polygon scale and check if it is inside |
---|
641 | // for each triangle. |
---|
642 | |
---|
643 | // Check first if outside extent |
---|
644 | // |
---|
645 | if ( p.x() < GetMinXExtent() - kCarTolerance * 0.5 || |
---|
646 | p.x() > GetMaxXExtent() + kCarTolerance * 0.5 || |
---|
647 | p.y() < GetMinYExtent() - kCarTolerance * 0.5 || |
---|
648 | p.y() > GetMaxYExtent() + kCarTolerance * 0.5 || |
---|
649 | p.z() < GetMinZExtent() - kCarTolerance * 0.5 || |
---|
650 | p.z() > GetMaxZExtent() + kCarTolerance * 0.5 ) |
---|
651 | { |
---|
652 | // G4cout << "G4ExtrudedSolid::Outside extent: " << p << G4endl; |
---|
653 | return kOutside; |
---|
654 | } |
---|
655 | |
---|
656 | // Project point p(z) to the polygon scale p0 |
---|
657 | // |
---|
658 | G4TwoVector pscaled = ProjectPoint(p); |
---|
659 | |
---|
660 | // Check if on surface of polygon |
---|
661 | // |
---|
662 | for ( G4int i=0; i<fNv; ++i ) |
---|
663 | { |
---|
664 | G4int j = (i+1) % fNv; |
---|
665 | if ( IsSameLine(pscaled, fPolygon[i], fPolygon[j]) ) |
---|
666 | { |
---|
667 | // G4cout << "G4ExtrudedSolid::Inside return Surface (on polygon) " |
---|
668 | // << G4endl; |
---|
669 | |
---|
670 | return kSurface; |
---|
671 | } |
---|
672 | } |
---|
673 | |
---|
674 | // Now check if inside triangles |
---|
675 | // |
---|
676 | std::vector< std::vector<G4int> >::const_iterator it = fTriangles.begin(); |
---|
677 | G4bool inside = false; |
---|
678 | do |
---|
679 | { |
---|
680 | if ( IsPointInside(fPolygon[(*it)[0]], fPolygon[(*it)[1]], |
---|
681 | fPolygon[(*it)[2]], pscaled) ) { inside = true; } |
---|
682 | ++it; |
---|
683 | } while ( (inside == false) && (it != fTriangles.end()) ); |
---|
684 | |
---|
685 | if ( inside ) |
---|
686 | { |
---|
687 | // Check if on surface of z sides |
---|
688 | // |
---|
689 | if ( std::fabs( p.z() - fZSections[0].fZ ) < kCarTolerance * 0.5 || |
---|
690 | std::fabs( p.z() - fZSections[fNz-1].fZ ) < kCarTolerance * 0.5 ) |
---|
691 | { |
---|
692 | // G4cout << "G4ExtrudedSolid::Inside return Surface (on z side)" |
---|
693 | // << G4endl; |
---|
694 | |
---|
695 | return kSurface; |
---|
696 | } |
---|
697 | |
---|
698 | // G4cout << "G4ExtrudedSolid::Inside return Inside" << G4endl; |
---|
699 | |
---|
700 | return kInside; |
---|
701 | } |
---|
702 | |
---|
703 | // G4cout << "G4ExtrudedSolid::Inside return Outside " << G4endl; |
---|
704 | |
---|
705 | return kOutside; |
---|
706 | } |
---|
707 | |
---|
708 | //_____________________________________________________________________________ |
---|
709 | |
---|
710 | G4double G4ExtrudedSolid::DistanceToOut (const G4ThreeVector &p, |
---|
711 | const G4ThreeVector &v, |
---|
712 | const G4bool calcNorm, |
---|
713 | G4bool *validNorm, |
---|
714 | G4ThreeVector *n) const |
---|
715 | { |
---|
716 | // Override the base class function to redefine validNorm |
---|
717 | // (the solid can be concave) |
---|
718 | |
---|
719 | G4double distOut = |
---|
720 | G4TessellatedSolid::DistanceToOut(p, v, calcNorm, validNorm, n); |
---|
721 | if (validNorm) { *validNorm = fIsConvex; } |
---|
722 | |
---|
723 | return distOut; |
---|
724 | } |
---|
725 | |
---|
726 | |
---|
727 | //_____________________________________________________________________________ |
---|
728 | |
---|
729 | G4double G4ExtrudedSolid::DistanceToOut (const G4ThreeVector &p) const |
---|
730 | { |
---|
731 | // Override the overloaded base class function |
---|
732 | |
---|
733 | return G4TessellatedSolid::DistanceToOut(p); |
---|
734 | } |
---|
735 | |
---|
736 | |
---|
737 | //_____________________________________________________________________________ |
---|
738 | |
---|
739 | std::ostream& G4ExtrudedSolid::StreamInfo(std::ostream &os) const |
---|
740 | { |
---|
741 | os << "-----------------------------------------------------------\n" |
---|
742 | << " *** Dump for solid - " << GetName() << " ***\n" |
---|
743 | << " ===================================================\n" |
---|
744 | << " Solid geometry type: " << fGeometryType << G4endl; |
---|
745 | |
---|
746 | if ( fIsConvex) |
---|
747 | { os << " Convex polygon; list of vertices:" << G4endl; } |
---|
748 | else |
---|
749 | { os << " Concave polygon; list of vertices:" << G4endl; } |
---|
750 | |
---|
751 | for ( G4int i=0; i<fNv; ++i ) |
---|
752 | { |
---|
753 | os << " vx = " << fPolygon[i].x()/mm << " mm" |
---|
754 | << " vy = " << fPolygon[i].y()/mm << " mm" << G4endl; |
---|
755 | } |
---|
756 | |
---|
757 | os << " Sections:" << G4endl; |
---|
758 | for ( G4int iz=0; iz<fNz; ++iz ) |
---|
759 | { |
---|
760 | os << " z = " << fZSections[iz].fZ/mm << " mm " |
---|
761 | << " x0= " << fZSections[iz].fOffset.x()/mm << " mm " |
---|
762 | << " y0= " << fZSections[iz].fOffset.y()/mm << " mm " |
---|
763 | << " scale= " << fZSections[iz].fScale << G4endl; |
---|
764 | } |
---|
765 | |
---|
766 | return os; |
---|
767 | } |
---|