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: G4SolidExtentList.cc,v 1.5 2007/05/11 13:54:29 gcosmo Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03 $ |
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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 | // |
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35 | // G4SolidExtentList.cc |
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36 | // |
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37 | // Implementation of a list of (voxel) extents along one axis |
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38 | // |
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39 | // -------------------------------------------------------------------- |
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40 | |
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41 | #include "G4SolidExtentList.hh" |
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42 | #include "G4VoxelLimits.hh" |
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43 | #include "G4GeometryTolerance.hh" |
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44 | |
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45 | |
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46 | // |
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47 | // Constructor (default) |
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48 | // |
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49 | G4SolidExtentList::G4SolidExtentList() |
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50 | { |
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51 | axis = kZAxis; |
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52 | limited = false; |
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53 | minLimit = -DBL_MAX; |
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54 | maxLimit = +DBL_MAX; |
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55 | } |
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56 | |
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57 | |
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58 | // |
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59 | // Constructor (limited case) |
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60 | // |
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61 | G4SolidExtentList::G4SolidExtentList( const EAxis targetAxis, |
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62 | const G4VoxelLimits &voxelLimits ) |
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63 | { |
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64 | axis = targetAxis; |
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65 | |
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66 | limited = voxelLimits.IsLimited( axis ); |
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67 | if (limited) |
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68 | { |
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69 | minLimit = voxelLimits.GetMinExtent( axis ); |
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70 | maxLimit = voxelLimits.GetMaxExtent( axis ); |
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71 | } |
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72 | else |
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73 | { |
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74 | minLimit = -DBL_MAX; |
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75 | maxLimit = +DBL_MAX; |
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76 | } |
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77 | } |
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78 | |
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79 | |
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80 | // |
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81 | // Destructor |
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82 | // |
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83 | G4SolidExtentList::~G4SolidExtentList() |
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84 | { |
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85 | } |
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86 | |
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87 | |
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88 | // |
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89 | // AddSurface |
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90 | // |
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91 | // |
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92 | void G4SolidExtentList::AddSurface( const G4ClippablePolygon &surface ) |
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93 | { |
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94 | // |
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95 | // Keep track of four surfaces |
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96 | // |
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97 | G4double min, max; |
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98 | |
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99 | surface.GetExtent( axis, min, max ); |
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100 | |
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101 | if (min > maxLimit) |
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102 | { |
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103 | // |
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104 | // Nearest surface beyond maximum limit |
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105 | // |
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106 | if (surface.InFrontOf(minAbove,axis)) minAbove = surface; |
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107 | } |
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108 | else if (max < minLimit) |
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109 | { |
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110 | // |
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111 | // Nearest surface below minimum limit |
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112 | // |
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113 | if (surface.BehindOf(maxBelow,axis)) maxBelow = surface; |
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114 | } |
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115 | else |
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116 | { |
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117 | // |
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118 | // Max and min surfaces inside |
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119 | // |
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120 | if (surface.BehindOf(maxSurface,axis)) maxSurface = surface; |
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121 | if (surface.InFrontOf(minSurface,axis)) minSurface = surface; |
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122 | } |
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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 | // |
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128 | // GetExtent |
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129 | // |
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130 | // Return extent after processing all surfaces |
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131 | // |
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132 | G4bool G4SolidExtentList::GetExtent( G4double &min, G4double &max ) const |
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133 | { |
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134 | G4double kCarTolerance = G4GeometryTolerance::GetInstance() |
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135 | ->GetSurfaceTolerance(); |
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136 | // |
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137 | // Did we have any surfaces within the limits? |
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138 | // |
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139 | if (minSurface.Empty()) |
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140 | { |
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141 | // |
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142 | // Nothing! Do we have anything above? |
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143 | // |
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144 | if (minAbove.Empty()) return false; |
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145 | |
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146 | // |
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147 | // Yup. Is it facing inwards? |
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148 | // |
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149 | if (minAbove.GetNormal().operator()(axis) < 0) return false; |
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150 | |
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151 | // |
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152 | // No. We must be entirely within the solid |
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153 | // |
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154 | max = maxLimit + kCarTolerance; |
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155 | min = minLimit - kCarTolerance; |
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156 | return true; |
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157 | } |
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158 | |
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159 | // |
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160 | // Check max surface |
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161 | // |
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162 | if (maxSurface.GetNormal().operator()(axis) < 0) |
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163 | { |
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164 | // |
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165 | // Inward facing: max limit must be embedded within solid |
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166 | // |
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167 | max = maxLimit + kCarTolerance; |
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168 | } |
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169 | else |
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170 | { |
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171 | G4double sMin, sMax; |
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172 | maxSurface.GetExtent( axis, sMin, sMax ); |
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173 | max = ( (sMax > maxLimit) ? maxLimit : sMax ) + kCarTolerance; |
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174 | } |
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175 | |
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176 | // |
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177 | // Check min surface |
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178 | // |
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179 | if (minSurface.GetNormal().operator()(axis) > 0) |
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180 | { |
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181 | // |
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182 | // Inward facing: max limit must be embedded within solid |
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183 | // |
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184 | min = minLimit - kCarTolerance; |
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185 | } |
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186 | else |
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187 | { |
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188 | G4double sMin, sMax; |
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189 | minSurface.GetExtent( axis, sMin, sMax ); |
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190 | min = ( (sMin < minLimit) ? minLimit : sMin ) - kCarTolerance; |
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191 | } |
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192 | |
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193 | return true; |
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194 | } |
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195 | |
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