Mercurial > hg > orthanc-stone
annotate Framework/Toolbox/DicomStructurePolygon2.cpp @ 1018:58eed6bbcabb
fix warnings
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 26 Sep 2019 09:22:27 +0200 |
parents | 38b6bb0bdd72 |
children | 29f5f2031310 |
rev | line source |
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1 /** |
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2 * Stone of Orthanc |
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
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5 * Copyright (C) 2017-2019 Osimis S.A., Belgium |
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6 * |
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7 * This program is free software: you can redistribute it and/or |
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8 * modify it under the terms of the GNU Affero General Public License |
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9 * as published by the Free Software Foundation, either version 3 of |
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10 * the License, or (at your option) any later version. |
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11 * |
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12 * This program is distributed in the hope that it will be useful, but |
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Affero General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU Affero General Public License |
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 **/ |
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20 |
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21 #include "DicomStructurePolygon2.h" |
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22 |
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23 #include "../Toolbox/LinearAlgebra.h" |
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24 |
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25 namespace OrthancStone |
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26 { |
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27 void DicomStructurePolygon2::ComputeDependentProperties() |
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28 { |
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29 ORTHANC_ASSERT(state_ == Building); |
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30 |
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31 for (size_t j = 0; j < points_.size(); ++j) |
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32 { |
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33 // TODO: move to AddPoint! |
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34 const Point3D& p = points_[j]; |
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35 if (p[0] < minX_) |
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36 minX_ = p[0]; |
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37 if (p[0] > maxX_) |
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38 maxX_ = p[0]; |
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39 |
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40 if (p[1] < minY_) |
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41 minY_ = p[1]; |
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42 if (p[1] > maxY_) |
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43 maxY_ = p[1]; |
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44 |
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45 if (p[2] < minZ_) |
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46 minZ_ = p[2]; |
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47 if (p[2] > maxZ_) |
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48 maxZ_ = p[2]; |
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49 } |
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50 |
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51 if (LinearAlgebra::IsNear(minX_, maxX_)) |
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52 { |
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53 LinearAlgebra::AssignVector(normal_, 1, 0, 0); |
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54 //ORTHANC_ASSERT(!LinearAlgebra::IsNear(minX, maxX)); |
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55 ORTHANC_ASSERT(!LinearAlgebra::IsNear(minY_, maxY_)); |
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56 ORTHANC_ASSERT(!LinearAlgebra::IsNear(minZ_, maxZ_)); |
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57 } |
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58 else if (LinearAlgebra::IsNear(minY_, maxY_)) |
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59 { |
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60 LinearAlgebra::AssignVector(normal_, 0, 1, 0); |
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61 ORTHANC_ASSERT(!LinearAlgebra::IsNear(minX_, maxX_)); |
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62 ORTHANC_ASSERT(!LinearAlgebra::IsNear(minZ_, maxZ_)); |
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63 } |
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64 else if (LinearAlgebra::IsNear(minZ_, maxZ_)) |
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65 { |
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66 LinearAlgebra::AssignVector(normal_, 0, 0, 1); |
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67 ORTHANC_ASSERT(!LinearAlgebra::IsNear(minX_, maxX_)); |
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68 ORTHANC_ASSERT(!LinearAlgebra::IsNear(minY_, maxY_)); |
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69 } |
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70 else |
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71 { |
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72 LOG(ERROR) << "The contour is not coplanar and not parallel to any axis."; |
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73 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); |
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74 } |
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75 state_ = Valid; |
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76 } |
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77 |
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78 |
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79 void DicomStructurePolygon2::ProjectOnConstantPlane( |
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80 std::vector<Point2D>& intersections, const CoordinateSystem3D& plane) const |
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81 { |
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82 // the plane can either have constant X, or constant Y. |
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83 // - for constant Z planes, use the ProjectOnParallelPlane method |
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84 // - other type of planes are not supported |
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85 |
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86 // V is the coordinate that is constant in the plane |
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87 double planeV = 0.0; |
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88 |
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89 // if true, then "u" in the code is "x" and "v" is "y". |
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90 // (v is constant in the plane) |
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91 bool uvxy = false; |
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92 |
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93 size_t uindex = static_cast<size_t>(-1); |
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94 size_t vindex = static_cast<size_t>(-1); |
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95 |
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96 ORTHANC_ASSERT(LinearAlgebra::IsNear(plane.GetNormal()[2], 0.0)); |
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97 |
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98 if (LinearAlgebra::IsNear(plane.GetNormal()[1], 0.0)) |
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99 { |
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100 // normal is 1,0,0 (or -1,0,0). |
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101 // plane is constant X |
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102 uindex = 1; |
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103 vindex = 0; |
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104 |
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105 uvxy = false; |
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106 planeV = plane.GetOrigin()[0]; |
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107 if (planeV < minX_) |
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108 return; |
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109 if (planeV > maxX_) |
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110 return; |
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111 } |
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112 else if (LinearAlgebra::IsNear(plane.GetNormal()[0], 0.0)) |
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113 { |
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114 // normal is 0,1,0 (or 0,-1,0). |
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115 // plane is constant Y |
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116 uindex = 0; |
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117 vindex = 1; |
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118 |
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119 uvxy = true; |
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120 planeV = plane.GetOrigin()[1]; |
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121 if (planeV < minY_) |
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122 return; |
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123 if (planeV > maxY_) |
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124 return; |
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125 } |
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126 else |
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127 { |
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128 // if the following assertion(s) fail(s), it means the plane is NOT a constant-X or constant-Y plane |
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129 LOG(ERROR) << "Plane normal must be (a,0,0) or (0,a,0), with a == -1 or a == 1"; |
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130 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); |
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131 } |
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132 |
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133 size_t pointCount = GetPointCount(); |
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134 if (pointCount >= 3) |
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135 { |
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136 // this vector will contain the coordinates of the intersection points |
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137 // between the plane and the polygon. |
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138 // these are expressed in the U coordinate, that is either X or Y, |
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139 // depending upon the plane orientation |
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140 std::vector<double> uIntersections; |
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141 |
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142 // we loop on the segments of the polygon (TODO: optimize) |
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143 // and we compute the intersection between each segment and the cut |
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144 // cutting plane (slice) has a constant X |
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145 |
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146 for (size_t iPoint = 0; iPoint < pointCount; ++iPoint) |
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147 { |
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148 double u1 = points_[iPoint][uindex]; |
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149 double v1 = points_[iPoint][vindex]; |
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150 |
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151 double u2 = 0; |
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152 double v2 = 0; |
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153 |
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154 if (iPoint < pointCount - 1) |
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155 { |
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156 u2 = points_[iPoint + 1][uindex]; |
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157 v2 = points_[iPoint + 1][vindex]; |
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158 } |
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159 else |
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160 { |
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161 u2 = points_[0][uindex]; |
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162 v2 = points_[0][vindex]; |
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163 } |
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164 |
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165 // Check if the segment intersects the plane |
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166 if ((std::min(v1, v2) <= planeV) && (std::max(v1, v2) >= planeV)) |
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167 { |
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168 // special case: the segment is parallel to the plane but close to it |
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169 if (LinearAlgebra::IsNear(v1, v2)) |
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170 { |
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171 // in that case, we choose to label both points as an intersection |
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172 double x, y; |
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173 plane.ProjectPoint(x, y, points_[iPoint]); |
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174 intersections.push_back(Point2D(x, y)); |
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175 |
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176 plane.ProjectPoint(x, y, points_[iPoint + 1]); |
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177 intersections.push_back(Point2D(x, y)); |
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178 } |
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179 else |
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180 { |
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181 // we are looking for u so that (u,planeV) belongs to the segment |
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182 // let's define alpha = (u-u2)/(u1-u2) --> u = alpha*(u1-u2) + u2 |
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183 // alpha = (v2-planeV)/(v2-v1) |
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184 // because the following two triangles are similar |
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185 // [ (planeY,x) , (y2,x2), (planeY,x2) ] or |
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186 // [ (planeX,y) , (x2,y2), (planeX,y2) ] |
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187 // and |
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188 // [ (y1 ,x1) , (y2,x2), (y1 ,x2) ] or |
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189 // [ (x1 ,y1) , (x2,y2), (x1 ,y2) ] |
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190 |
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191 /* |
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192 void CoordinateSystem3D::ProjectPoint(double& offsetX, |
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193 double& offsetY, |
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194 const Vector& point) const |
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195 */ |
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196 double alpha = (v2 - planeV) / (v2 - v1); |
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197 |
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198 // get rid of numerical oddities |
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199 if (alpha < 0.0) |
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200 alpha = 0.0; |
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201 if (alpha > 1.0) |
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202 alpha = 1.0; |
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203 double u = alpha * (u1 - u2) + u2; |
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204 |
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205 // here is the intersection in world coordinates |
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206 Vector intersection; |
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207 if(uvxy) |
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208 LinearAlgebra::AssignVector(intersection, u, planeV, minZ_); |
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209 else |
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210 LinearAlgebra::AssignVector(intersection, planeV, u, minZ_); |
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211 |
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212 // and we convert it to plane coordinates |
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213 { |
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214 double xi, yi; |
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215 plane.ProjectPoint(xi, yi, intersection); |
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216 |
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217 // we consider that the x axis is always parallel to the polygons |
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218 // TODO: is this hypothesis safe?????? |
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219 uIntersections.insert(std::lower_bound(uIntersections.begin(), uIntersections.end(), xi), xi); |
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220 } |
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221 } |
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222 } |
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223 } // end of for (size_t iPoint = 0; iPoint < pointCount; ++iPoint) |
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224 |
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225 // now we convert the intersections to plane points |
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226 // we consider that the x axis is always parallel to the polygons |
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227 // TODO: same hypothesis as above: plane is perpendicular to polygons, |
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228 // plane is parallel to the XZ (constant Y) or YZ (constant X) 3D planes |
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229 for (size_t i = 0; i < uIntersections.size(); ++i) |
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230 { |
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231 double x = uIntersections[i]; |
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232 intersections.push_back(Point2D(x, minZ_)); |
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233 } |
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234 } // end of if (pointCount >= 3) |
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235 else |
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236 { |
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237 LOG(ERROR) << "This polygon has " << pointCount << " vertices, which is less than 3 --> skipping"; |
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238 } |
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239 } |
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240 |
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241 void OrthancStone::DicomStructurePolygon2::ProjectOnParallelPlane( |
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242 std::vector< std::pair<Point2D, Point2D> >& segments, |
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243 const CoordinateSystem3D& plane) const |
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244 { |
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245 if (points_.size() < 3) |
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246 return; |
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247 |
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248 // the plane is horizontal |
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249 ORTHANC_ASSERT(LinearAlgebra::IsNear(plane.GetNormal()[0], 0.0)); |
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250 ORTHANC_ASSERT(LinearAlgebra::IsNear(plane.GetNormal()[1], 0.0)); |
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251 |
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252 segments.clear(); |
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253 segments.reserve(points_.size()); |
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254 // since the returned values need to be expressed in the supplied coordinate |
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255 // system, we need to subtract origin_ from the returned points |
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256 |
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257 double planeOriginX = plane.GetOrigin()[0]; |
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258 double planeOriginY = plane.GetOrigin()[1]; |
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259 |
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260 // precondition: points_.size() >= 3 |
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261 for (size_t j = 0; j < points_.size()-1; ++j) |
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262 { |
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263 // segment between point j and j+1 |
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264 |
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265 const Point3D& point0 = GetPoint(j); |
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266 // subtract plane origin x and y |
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267 Point2D p0(point0[0] - planeOriginX, point0[1] - planeOriginY); |
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268 |
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269 const Point3D& point1 = GetPoint(j+1); |
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270 // subtract plane origin x and y |
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271 Point2D p1(point1[0] - planeOriginX, point1[1] - planeOriginY); |
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272 |
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273 segments.push_back(std::pair<Point2D, Point2D>(p0,p1)); |
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274 } |
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275 |
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276 |
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277 // final segment |
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278 |
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279 const Point3D& point0 = GetPoint(points_.size() - 1); |
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280 // subtract plane origin x and y |
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281 Point2D p0(point0[0] - planeOriginX, point0[1] - planeOriginY); |
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282 |
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283 const Point3D& point1 = GetPoint(0); |
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284 // subtract plane origin x and y |
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285 Point2D p1(point1[0] - planeOriginX, point1[1] - planeOriginY); |
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286 |
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287 segments.push_back(std::pair<Point2D, Point2D>(p0, p1)); |
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288 } |
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289 |
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290 double OrthancStone::DicomStructurePolygon2::GetZ() const |
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291 { |
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292 ORTHANC_ASSERT(LinearAlgebra::IsNear(normal_[0], 0.0)); |
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293 ORTHANC_ASSERT(LinearAlgebra::IsNear(normal_[1], 0.0)); |
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294 ORTHANC_ASSERT(LinearAlgebra::IsNear(minZ_, maxZ_)); |
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295 return minZ_; |
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296 } |
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297 |
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298 |
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299 } |