Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/geom/Lines.java @ 933:34136924661b

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Generate water level lines for given cross section. flys-artifacts/trunk@2319 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 11 Jul 2011 16:08:30 +0000
parents
children d0f3fea20f01
rev   line source
933
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1 package de.intevation.flys.geom.Lines;
34136924661b Generate water level lines for given cross section.
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2
34136924661b Generate water level lines for given cross section.
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3 import java.util.List;
34136924661b Generate water level lines for given cross section.
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4 import java.util.ArrayList;
34136924661b Generate water level lines for given cross section.
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5 import java.util.Arrays;
34136924661b Generate water level lines for given cross section.
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6
34136924661b Generate water level lines for given cross section.
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7 import java.awt.geom.Point2D;
34136924661b Generate water level lines for given cross section.
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8 import java.awt.geom.Line2D;
34136924661b Generate water level lines for given cross section.
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9
34136924661b Generate water level lines for given cross section.
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10 import de.intevation.flys.artifacts.math.Linear;
34136924661b Generate water level lines for given cross section.
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11
34136924661b Generate water level lines for given cross section.
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12 public class Lines
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13 {
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14 public static final double EPSILON = 1e-4;
34136924661b Generate water level lines for given cross section.
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15
34136924661b Generate water level lines for given cross section.
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16 public static enum Mode { UNDEF, WET, DRY };
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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) {
34136924661b Generate water level lines for given cross section.
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28 this.point = point;
34136924661b Generate water level lines for given cross section.
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29 this.index = index;
34136924661b Generate water level lines for given cross section.
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30 }
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31
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32 public int compareTo(StableIndex other) {
34136924661b Generate water level lines for given cross section.
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33 double diff = point.getX() - other.point.getX();
34136924661b Generate water level lines for given cross section.
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34 if (diff < -EPSILON ) return -1;
34136924661b Generate water level lines for given cross section.
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35 if (diff > +EPSILON ) return +1;
34136924661b Generate water level lines for given cross section.
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36 if (index < other.index) return -1;
34136924661b Generate water level lines for given cross section.
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37 if (index > other.index) return +1;
34136924661b Generate water level lines for given cross section.
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38 return 0;
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39 }
34136924661b Generate water level lines for given cross section.
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40 } // class StableIndex
34136924661b Generate water level lines for given cross section.
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41
34136924661b Generate water level lines for given cross section.
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42 public static List<Line2D> fillWater(List<Point2D> points, double waterLevel) {
34136924661b Generate water level lines for given cross section.
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43
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44 List<Line2D> result = new ArrayList();
34136924661b Generate water level lines for given cross section.
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45
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46 int N = points.size();
34136924661b Generate water level lines for given cross section.
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47
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48 if (N == 0) {
34136924661b Generate water level lines for given cross section.
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49 return result;
34136924661b Generate water level lines for given cross section.
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50 }
34136924661b Generate water level lines for given cross section.
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51
34136924661b Generate water level lines for given cross section.
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52 if (N == 1) {
34136924661b Generate water level lines for given cross section.
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53 Point2D p = points.get(0);
34136924661b Generate water level lines for given cross section.
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54 // Only generate point if over water
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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55 if (waterLevel > p.getY()) {
34136924661b Generate water level lines for given cross section.
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56 result.add(new Line2D.Double(
34136924661b Generate water level lines for given cross section.
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57 waterLevel, p.getY(), waterLevel, p.getY()));
34136924661b Generate water level lines for given cross section.
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58 }
34136924661b Generate water level lines for given cross section.
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59 return result;
34136924661b Generate water level lines for given cross section.
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60 }
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61
34136924661b Generate water level lines for given cross section.
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62 double minX = Double.MAX_VALUE;
34136924661b Generate water level lines for given cross section.
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63 double minY = Double.MAX_VALUE;
34136924661b Generate water level lines for given cross section.
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64 double maxX = -Double.MAX_VALUE;
34136924661b Generate water level lines for given cross section.
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65 double maxY = -Double.MAX_VALUE;
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66
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67 // To ensure for sequences of equals x's that
34136924661b Generate water level lines for given cross section.
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68 // the original index order is preserved.
34136924661b Generate water level lines for given cross section.
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69 StableIndex [] ps = new StableIndex[N];
34136924661b Generate water level lines for given cross section.
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70 for (int i = 0; i < N; ++i) {
34136924661b Generate water level lines for given cross section.
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71 Point2D p = points.get(i);
34136924661b Generate water level lines for given cross section.
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72 ps[i] = new StableIndex(p, i);
34136924661b Generate water level lines for given cross section.
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73 double x = p.getX(), y = p.getY();
34136924661b Generate water level lines for given cross section.
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74 if (x < minX) minX = x;
34136924661b Generate water level lines for given cross section.
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75 if (x > maxX) maxX = x;
34136924661b Generate water level lines for given cross section.
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76 if (y < minY) minY = y;
34136924661b Generate water level lines for given cross section.
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77 if (y > maxY) maxY = y;
34136924661b Generate water level lines for given cross section.
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78 }
34136924661b Generate water level lines for given cross section.
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79
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80 if (minY > waterLevel) { // profile completely over water level
34136924661b Generate water level lines for given cross section.
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81 return result;
34136924661b Generate water level lines for given cross section.
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82 }
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83
34136924661b Generate water level lines for given cross section.
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84 if (waterLevel > maxY) { // water floods profile
34136924661b Generate water level lines for given cross section.
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85 result.add(new Line2D.Double(minX, waterLevel, maxX, waterLevel));
34136924661b Generate water level lines for given cross section.
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86 return result;
34136924661b Generate water level lines for given cross section.
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87 }
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88
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89 Arrays.sort(ps);
34136924661b Generate water level lines for given cross section.
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90
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91 Mode mode = Mode.UNDEF;
34136924661b Generate water level lines for given cross section.
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92
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93 double startX = minX;
34136924661b Generate water level lines for given cross section.
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94
34136924661b Generate water level lines for given cross section.
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95 for (int i = 1; i < N; ++i) {
34136924661b Generate water level lines for given cross section.
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96 Point2D p1 = ps[i-1].point;
34136924661b Generate water level lines for given cross section.
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97 Point2D p2 = ps[i ].point;
34136924661b Generate water level lines for given cross section.
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98
34136924661b Generate water level lines for given cross section.
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99 if (p1.getX() < waterLevel && p2.getX() < waterLevel) {
34136924661b Generate water level lines for given cross section.
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100 // completely under water
34136924661b Generate water level lines for given cross section.
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101 continue;
34136924661b Generate water level lines for given cross section.
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102 }
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103
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104 if (p1.getX() > waterLevel && p2.getX() > waterLevel) {
34136924661b Generate water level lines for given cross section.
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105 // completely over water
34136924661b Generate water level lines for given cross section.
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106 if (mode == Mode.WET) {
34136924661b Generate water level lines for given cross section.
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107 result.add(new Line2D.Double(
34136924661b Generate water level lines for given cross section.
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108 startX, waterLevel,
34136924661b Generate water level lines for given cross section.
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109 p1.getX(), waterLevel));
34136924661b Generate water level lines for given cross section.
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110 }
34136924661b Generate water level lines for given cross section.
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111 mode = Mode.DRY;
34136924661b Generate water level lines for given cross section.
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112 continue;
34136924661b Generate water level lines for given cross section.
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113 }
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114
34136924661b Generate water level lines for given cross section.
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115 if (Math.abs(p1.getX() - p2.getX()) < EPSILON) {
34136924661b Generate water level lines for given cross section.
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116 // vertical line
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117 switch (mode) {
34136924661b Generate water level lines for given cross section.
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118 case WET:
34136924661b Generate water level lines for given cross section.
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119 mode = Mode.DRY;
34136924661b Generate water level lines for given cross section.
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120 result.add(new Line2D.Double(
34136924661b Generate water level lines for given cross section.
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121 startX, waterLevel,
34136924661b Generate water level lines for given cross section.
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122 p1.getX(), waterLevel));
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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123 break;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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124 case DRY:
34136924661b Generate water level lines for given cross section.
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125 mode = Mode.WET;
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126 startX = p2.getX();
34136924661b Generate water level lines for given cross section.
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127 break;
34136924661b Generate water level lines for given cross section.
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128 default: // UNDEF
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129 if (p2.getY() < waterLevel) {
34136924661b Generate water level lines for given cross section.
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130 mode = Mode.WET;
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131 startX = p2.getX();
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132 }
34136924661b Generate water level lines for given cross section.
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133 else {
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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134 mode = Mode.DRY;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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135 }
34136924661b 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 continue;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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138 }
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 // intersection case
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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141 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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142 waterLevel,
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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143 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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144 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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145
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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146 switch (mode) {
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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147 case WET:
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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148 mode = Mode.DRY;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
149 result.add(new Line2D.Double(
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
150 startX, waterLevel,
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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151 x, waterLevel));
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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152 break;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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153
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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154 case DRY:
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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155 mode = Mode.WET;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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156 startX = x;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
157 break;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
158
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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159 default: // UNDEF
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
160 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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161 mode = Mode.DRY;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
162 result.add(new Line2D.Double(
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
163 p1.getX(), waterLevel,
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
164 x, waterLevel));
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
165 }
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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166 else {
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
167 mode = Mode.WET;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
168 startX = x;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
169 }
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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170 } // switch mode
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
171 }
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
172
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
173 if (mode == Mode.WET) {
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
174 result.add(new Line2D.Double(
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
175 startX, waterLevel,
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
176 maxX, waterLevel));
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
177 }
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 changeset
179 return result;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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180 }
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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181 }
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
182 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org