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annotate OrthancStone/Sources/Toolbox/Extent2D.cpp @ 1515:b750b6eab453

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 07 Jul 2020 20:52:35 +0200
parents 244ad1e4e76a
children 4fb8fdf03314
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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) 2017-2020 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
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22 #include "Extent2D.h"
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23
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24 #include <algorithm>
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25 #include <cassert>
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26 #include <limits>
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27
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28 namespace OrthancStone
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29 {
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30 Extent2D::Extent2D(double x1,
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31 double y1,
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32 double x2,
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33 double y2) :
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34 empty_(false),
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35 x1_(x1),
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36 y1_(y1),
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37 x2_(x2),
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38 y2_(y2)
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39 {
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40 if (x1_ > x2_)
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41 {
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42 std::swap(x1_, x2_);
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43 }
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44
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45 if (y1_ > y2_)
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46 {
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47 std::swap(y1_, y2_);
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48 }
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49 }
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50
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51
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52 void Extent2D::Reset()
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53 {
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54 empty_ = true;
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55 x1_ = 0;
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56 y1_ = 0;
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57 x2_ = 0;
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58 y2_ = 0;
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59 }
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60
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61 void Extent2D::AddPoint(double x,
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62 double y)
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63 {
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64 if (empty_)
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65 {
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66 x1_ = x;
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67 y1_ = y;
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68 x2_ = x;
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69 y2_ = y;
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70 empty_ = false;
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71 }
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72 else
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73 {
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74 x1_ = std::min(x1_, x);
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75 y1_ = std::min(y1_, y);
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76 x2_ = std::max(x2_, x);
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77 y2_ = std::max(y2_, y);
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78 }
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79
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80 assert(x1_ <= x2_ &&
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81 y1_ <= y2_); // This is the invariant of the structure
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82 }
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83
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84
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85 void Extent2D::Union(const Extent2D& other)
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86 {
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87 if (other.empty_)
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88 {
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89 return;
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90 }
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91
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92 if (empty_)
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93 {
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94 *this = other;
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95 return;
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96 }
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97
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98 assert(!empty_);
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99
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100 x1_ = std::min(x1_, other.x1_);
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101 y1_ = std::min(y1_, other.y1_);
99
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102 x2_ = std::max(x2_, other.x2_);
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103 y2_ = std::max(y2_, other.y2_);
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104
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105 assert(x1_ <= x2_ &&
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106 y1_ <= y2_); // This is the invariant of the structure
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107 }
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108
109
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109
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110 bool Extent2D::IsEmpty() const
109
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111 {
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112 if (empty_)
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113 {
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114 return true;
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115 }
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116 else
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117 {
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118 assert(x1_ <= x2_ &&
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119 y1_ <= y2_);
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120 return (x2_ <= x1_ + 10 * std::numeric_limits<double>::epsilon() ||
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121 y2_ <= y1_ + 10 * std::numeric_limits<double>::epsilon());
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122 }
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123 }
168
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124
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125
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126 bool Extent2D::Contains(double x,
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127 double y) const
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128 {
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129 if (empty_)
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130 {
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131 return false;
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132 }
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133 else
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134 {
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135 return (x >= x1_ && x <= x2_ &&
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136 y >= y1_ && y <= y2_);
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137 }
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138 }
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139 }