Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/geom/Lines.java @ 934:d0f3fea20f01
Fixed corner case.
flys-artifacts/trunk@2320 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Tue, 12 Jul 2011 08:05:54 +0000 |
parents | 34136924661b |
children | bd3683453928 |
rev | line source |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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1 package de.intevation.flys.geom.Lines; |
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Generate water level lines for given cross section.
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parents:
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2 |
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Generate water level lines for given cross section.
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3 import java.util.List; |
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Generate water level lines for given cross section.
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4 import java.util.ArrayList; |
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Generate water level lines for given cross section.
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5 import java.util.Arrays; |
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Generate water level lines for given cross section.
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6 |
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7 import java.awt.geom.Point2D; |
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Generate water level lines for given cross section.
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8 import java.awt.geom.Line2D; |
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Generate water level lines for given cross section.
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9 |
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10 import de.intevation.flys.artifacts.math.Linear; |
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Generate water level lines for given cross section.
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11 |
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12 public class Lines |
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Generate water level lines for given cross section.
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13 { |
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14 public static final double EPSILON = 1e-4; |
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15 |
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16 public static enum Mode { UNDEF, WET, DRY }; |
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Generate water level lines for given cross section.
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17 |
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18 protected Lines() { |
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19 } |
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20 |
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21 public static final class StableIndex |
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22 implements Comparable<StableIndex> |
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23 { |
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24 protected Point2D point; |
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25 protected int index; |
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26 |
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27 public StableIndex(Point2D point, int index) { |
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28 this.point = point; |
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29 this.index = index; |
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30 } |
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31 |
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32 public int compareTo(StableIndex other) { |
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33 double diff = point.getX() - other.point.getX(); |
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34 if (diff < -EPSILON ) return -1; |
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35 if (diff > +EPSILON ) return +1; |
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36 if (index < other.index) return -1; |
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37 if (index > other.index) return +1; |
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38 return 0; |
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39 } |
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40 } // class StableIndex |
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41 |
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42 public static List<Line2D> fillWater(List<Point2D> points, double waterLevel) { |
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Generate water level lines for given cross section.
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43 |
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44 List<Line2D> result = new ArrayList(); |
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45 |
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46 int N = points.size(); |
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47 |
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48 if (N == 0) { |
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49 return result; |
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50 } |
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51 |
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52 if (N == 1) { |
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53 Point2D p = points.get(0); |
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54 // Only generate point if over water |
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55 if (waterLevel > p.getY()) { |
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56 result.add(new Line2D.Double( |
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57 p.getX(), waterLevel, |
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58 p.getX(), waterLevel)); |
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59 } |
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60 return result; |
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61 } |
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62 |
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63 double minX = Double.MAX_VALUE; |
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64 double minY = Double.MAX_VALUE; |
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65 double maxX = -Double.MAX_VALUE; |
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66 double maxY = -Double.MAX_VALUE; |
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67 |
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68 // To ensure for sequences of equals x's that |
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69 // the original index order is preserved. |
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70 StableIndex [] ps = new StableIndex[N]; |
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71 for (int i = 0; i < N; ++i) { |
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72 Point2D p = points.get(i); |
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73 ps[i] = new StableIndex(p, i); |
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74 double x = p.getX(), y = p.getY(); |
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Generate water level lines for given cross section.
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75 if (x < minX) minX = x; |
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Generate water level lines for given cross section.
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76 if (x > maxX) maxX = x; |
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Generate water level lines for given cross section.
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77 if (y < minY) minY = y; |
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Generate water level lines for given cross section.
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78 if (y > maxY) maxY = y; |
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Generate water level lines for given cross section.
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79 } |
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Generate water level lines for given cross section.
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80 |
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81 if (minY > waterLevel) { // profile completely over water level |
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82 return result; |
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83 } |
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Generate water level lines for given cross section.
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84 |
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Generate water level lines for given cross section.
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85 if (waterLevel > maxY) { // water floods profile |
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86 result.add(new Line2D.Double(minX, waterLevel, maxX, waterLevel)); |
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87 return result; |
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Generate water level lines for given cross section.
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88 } |
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Generate water level lines for given cross section.
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89 |
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90 Arrays.sort(ps); |
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Generate water level lines for given cross section.
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91 |
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92 Mode mode = Mode.UNDEF; |
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Generate water level lines for given cross section.
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93 |
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94 double startX = minX; |
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95 |
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96 for (int i = 1; i < N; ++i) { |
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97 Point2D p1 = ps[i-1].point; |
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98 Point2D p2 = ps[i ].point; |
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99 |
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100 if (p1.getX() < waterLevel && p2.getX() < waterLevel) { |
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Generate water level lines for given cross section.
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101 // completely under water |
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102 continue; |
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103 } |
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Generate water level lines for given cross section.
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104 |
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105 if (p1.getX() > waterLevel && p2.getX() > waterLevel) { |
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Generate water level lines for given cross section.
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106 // completely over water |
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107 if (mode == Mode.WET) { |
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108 result.add(new Line2D.Double( |
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109 startX, waterLevel, |
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Generate water level lines for given cross section.
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110 p1.getX(), waterLevel)); |
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111 } |
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112 mode = Mode.DRY; |
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113 continue; |
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114 } |
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115 |
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116 if (Math.abs(p1.getX() - p2.getX()) < EPSILON) { |
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117 // vertical line |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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118 switch (mode) { |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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119 case WET: |
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Generate water level lines for given cross section.
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120 mode = Mode.DRY; |
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Generate water level lines for given cross section.
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121 result.add(new Line2D.Double( |
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Generate water level lines for given cross section.
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122 startX, waterLevel, |
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Generate water level lines for given cross section.
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123 p1.getX(), waterLevel)); |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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124 break; |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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125 case DRY: |
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Generate water level lines for given cross section.
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126 mode = Mode.WET; |
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Generate water level lines for given cross section.
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127 startX = p2.getX(); |
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Generate water level lines for given cross section.
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128 break; |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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129 default: // UNDEF |
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Generate water level lines for given cross section.
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130 if (p2.getY() < waterLevel) { |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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131 mode = Mode.WET; |
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Generate water level lines for given cross section.
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132 startX = p2.getX(); |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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133 } |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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134 else { |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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135 mode = Mode.DRY; |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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136 } |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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137 } |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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138 continue; |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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139 } |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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140 |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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141 // intersection case |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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142 double x = Linear.linear( |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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143 waterLevel, |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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144 p1.getY(), p1.getX(), |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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145 p2.getY(), p2.getX()); |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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146 |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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147 switch (mode) { |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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148 case WET: |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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149 mode = Mode.DRY; |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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150 result.add(new Line2D.Double( |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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151 startX, waterLevel, |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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152 x, waterLevel)); |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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153 break; |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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154 |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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155 case DRY: |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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156 mode = Mode.WET; |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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157 startX = x; |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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158 break; |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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159 |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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160 default: // UNDEF |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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161 if (p2.getY() > waterLevel) { |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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162 mode = Mode.DRY; |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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163 result.add(new Line2D.Double( |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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164 p1.getX(), waterLevel, |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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165 x, waterLevel)); |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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166 } |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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|
167 else { |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
168 mode = Mode.WET; |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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169 startX = x; |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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170 } |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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171 } // switch mode |
934
d0f3fea20f01
Fixed corner case.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
933
diff
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|
172 } // for all points p[i] and p[i-1] |
933
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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173 |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
174 if (mode == Mode.WET) { |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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175 result.add(new Line2D.Double( |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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176 startX, waterLevel, |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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177 maxX, waterLevel)); |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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|
178 } |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
179 |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
180 return result; |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
181 } |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
182 } |
34136924661b
Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
183 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |