Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Toolbox/Extent2D.cpp @ 1842:9568082ee013
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 24 Jun 2021 14:19:36 +0200 |
parents | 9ac2a65d4172 |
children | 3889ae96d2e9 |
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) 2017-2021 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 Lesser 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 * Lesser 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 Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
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20 **/ |
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21 |
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22 |
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23 #include "Extent2D.h" |
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24 |
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25 #include <algorithm> |
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26 #include <cassert> |
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27 #include <limits> |
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28 |
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29 namespace OrthancStone |
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30 { |
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31 Extent2D::Extent2D(double x1, |
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32 double y1, |
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33 double x2, |
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34 double y2) : |
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35 empty_(false), |
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36 x1_(x1), |
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37 y1_(y1), |
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38 x2_(x2), |
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39 y2_(y2) |
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40 { |
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41 if (x1_ > x2_) |
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42 { |
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43 std::swap(x1_, x2_); |
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44 } |
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45 |
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46 if (y1_ > y2_) |
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47 { |
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48 std::swap(y1_, y2_); |
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49 } |
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50 } |
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51 |
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52 |
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53 void Extent2D::Clear() |
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54 { |
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55 empty_ = true; |
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56 x1_ = 0; |
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57 y1_ = 0; |
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58 x2_ = 0; |
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59 y2_ = 0; |
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60 } |
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61 |
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62 void Extent2D::AddPoint(double x, |
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63 double y) |
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64 { |
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65 if (empty_) |
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66 { |
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67 x1_ = x; |
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68 y1_ = y; |
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69 x2_ = x; |
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70 y2_ = y; |
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71 empty_ = false; |
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72 } |
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73 else |
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74 { |
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75 x1_ = std::min(x1_, x); |
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76 y1_ = std::min(y1_, y); |
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77 x2_ = std::max(x2_, x); |
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78 y2_ = std::max(y2_, y); |
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79 } |
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80 |
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81 assert(x1_ <= x2_ && |
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82 y1_ <= y2_); // This is the invariant of the structure |
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83 } |
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84 |
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85 |
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86 void Extent2D::Union(const Extent2D& other) |
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87 { |
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88 if (other.empty_) |
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89 { |
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90 return; |
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91 } |
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92 |
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93 if (empty_) |
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94 { |
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95 *this = other; |
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96 return; |
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97 } |
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98 |
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99 assert(!empty_); |
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100 |
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101 x1_ = std::min(x1_, other.x1_); |
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102 y1_ = std::min(y1_, other.y1_); |
99 | 103 x2_ = std::max(x2_, other.x2_); |
104 y2_ = std::max(y2_, other.y2_); | |
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105 |
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106 assert(x1_ <= x2_ && |
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107 y1_ <= y2_); // This is the invariant of the structure |
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108 } |
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109 |
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110 |
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111 bool Extent2D::IsEmpty() const |
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112 { |
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113 if (empty_) |
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114 { |
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115 return true; |
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116 } |
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117 else |
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118 { |
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119 assert(x1_ <= x2_ && |
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120 y1_ <= y2_); |
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121 return (x2_ <= x1_ + 10 * std::numeric_limits<double>::epsilon() || |
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122 y2_ <= y1_ + 10 * std::numeric_limits<double>::epsilon()); |
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Sebastien Jodogne <s.jodogne@gmail.com>
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123 } |
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124 } |
168 | 125 |
126 | |
127 bool Extent2D::Contains(double x, | |
128 double y) const | |
129 { | |
130 if (empty_) | |
131 { | |
132 return false; | |
133 } | |
134 else | |
135 { | |
136 return (x >= x1_ && x <= x2_ && | |
137 y >= y1_ && y <= y2_); | |
138 } | |
139 } | |
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140 } |