Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/geom/Lines.java @ 2676:6af95cecdd03

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More stable waterlinefacet, in prep for fix issue620. flys-artifacts/trunk@4374 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Thu, 10 May 2012 09:00:17 +0000
parents 2be59d5b342c
children 22c8a9b4de31
rev   line source
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1 package de.intevation.flys.geom;
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2
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3 import java.util.ArrayList;
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4 import java.util.List;
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5 import java.util.Iterator;
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6
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7 import java.awt.geom.Point2D;
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8 import java.awt.geom.Line2D;
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9
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10 import de.intevation.flys.artifacts.math.Linear;
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11
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12 import org.apache.log4j.Logger;
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14 import gnu.trove.TDoubleArrayList;
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15
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16 /**
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17 * Utility to create lines (intersect water with cross-section etc).
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18 */
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19 public class Lines
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20 {
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21 private static Logger log = Logger.getLogger(Lines.class);
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22
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23 public static final double EPSILON = 1e-4;
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25 public static enum Mode { UNDEF, WET, DRY };
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26
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27 protected Lines() {
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28 }
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29
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30
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31 /**
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32 * Calculate area of polygon with four vertices.
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33 * @return area of polygon with four vertices.
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34 */
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35 public static double area(Point2D p1, Point2D p2, Point2D p3, Point2D p4) {
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36 double[] x = new double[] {p1.getX(), p2.getX(), p3.getX(), p4.getX() };
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37 double[] y = new double[] {p1.getY(), p2.getY(), p3.getY(), p4.getY() };
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38 double area = 0d;
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39 int j = 3;
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40 for (int i=0; i <4; i++) {
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41 area += (x[j] + x[i]) * (y[j] - y[i]);
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42 j = i;
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43 }
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44 return area * 0.5d;
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45 }
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47
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48 /**
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49 * Calculate the 'length' of the given lines.
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50 */
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51 public static double length(List<Line2D> lines) {
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52 double sum = 0d;
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53 for (Line2D line: lines) {
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54 double xDiff = line.getX1() - line.getX2();
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55 double yDiff = line.getY1() - line.getY2();
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56 sum += Math.sqrt(xDiff*xDiff + yDiff*yDiff);
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57 }
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58 return sum;
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59 }
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61
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62 /** List of lines and a double-precision area. */
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63 private static class ListWithArea {
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64 public List<Line2D> lines;
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65 public double area;
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66 public ListWithArea(List<Line2D> lines, double area) {
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67 this.lines = lines;
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68 this.area = area;
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69 }
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70 }
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71
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72
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73 public static ListWithArea fillWater(List<Point2D> points, double waterLevel) {
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74
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75 boolean debug = log.isDebugEnabled();
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76
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77 if (debug) {
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78 log.debug("fillWater");
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79 log.debug("----------------------------");
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80 }
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81
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82 List<Line2D> result = new ArrayList();
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83
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84 int N = points.size();
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85
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86 if (N == 0) {
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87 return new ListWithArea(result, 0d);
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88 }
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89
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90 if (N == 1) {
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91 Point2D p = points.get(0);
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92 // Only generate point if over profile
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93 if (waterLevel > p.getY()) {
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94 result.add(new Line2D.Double(
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95 p.getX(), waterLevel,
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96 p.getX(), waterLevel));
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97 }
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98 return new ListWithArea(result, 0d);
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99 }
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100
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101 double minX = Double.MAX_VALUE;
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102 double minY = Double.MAX_VALUE;
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103 double maxX = -Double.MAX_VALUE;
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104 double maxY = -Double.MAX_VALUE;
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105
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106 // To ensure for sequences of equals x's that
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107 // the original index order is preserved.
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108 for (Point2D p: points) {
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109 double x = p.getX(), y = p.getY();
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110 if (x < minX) minX = x;
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111 if (x > maxX) maxX = x;
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112 if (y < minY) minY = y;
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113 if (y > maxY) maxY = y;
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114 }
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115
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116 if (minY > waterLevel) { // profile completely over water level
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117 log.debug("complete over water");
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118 return new ListWithArea(result, 0d);
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119 }
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120
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121 if (waterLevel > maxY) { // water floods profile
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122 log.debug("complete under water");
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123 result.add(new Line2D.Double(minX, waterLevel, maxX, waterLevel));
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124 return new ListWithArea(result, 0d);
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125 }
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126
2673
0143b44631cc Beginnings of mittlere hoehe calculation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2652
diff changeset
127 // Water is sometimes above, sometimes under profile.
933
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parents:
diff changeset
128 Mode mode = Mode.UNDEF;
34136924661b Generate water level lines for given cross section.
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parents:
diff changeset
129
938
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diff changeset
130 double startX = minX;
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parents:
diff changeset
131
2673
0143b44631cc Beginnings of mittlere hoehe calculation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2652
diff changeset
132 double area = 0d;
0143b44631cc Beginnings of mittlere hoehe calculation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2652
diff changeset
133 // Walking along the profile.
933
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parents:
diff changeset
134 for (int i = 1; i < N; ++i) {
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diff changeset
135 Point2D p1 = points.get(i-1);
bd3683453928 Debugged the water fill algorithm.
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diff changeset
136 Point2D p2 = points.get(i);
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34136924661b Generate water level lines for given cross section.
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parents:
diff changeset
137
938
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parents: 934
diff changeset
138 if (p1.getY() < waterLevel && p2.getY() < waterLevel) {
933
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
139 // completely under water
938
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diff changeset
140 if (debug) {
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
141 log.debug("under water: " + p1 + " " + p2);
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
142 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
143 if (mode != Mode.WET) {
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
144 startX = p1.getX();
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
145 mode = Mode.WET;
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
146 }
2673
0143b44631cc Beginnings of mittlere hoehe calculation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2652
diff changeset
147 area += area(p1, p2,
0143b44631cc Beginnings of mittlere hoehe calculation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2652
diff changeset
148 new Point2D.Double(p2.getX(), waterLevel),
0143b44631cc Beginnings of mittlere hoehe calculation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2652
diff changeset
149 new Point2D.Double(p1.getX(), waterLevel));
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parents:
diff changeset
150 continue;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
151 }
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
152
2673
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2652
diff changeset
153 // TODO trigger area calculation
938
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
154 if (p1.getY() > waterLevel && p2.getY() > waterLevel) {
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
155 if (debug) {
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
156 log.debug("over water: " + p1 + " " + p2);
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
157 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
158 // completely over water
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
159 if (mode == Mode.WET) {
938
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
160 log.debug("over/wet");
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34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
161 result.add(new Line2D.Double(
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
162 startX, waterLevel,
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 }
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
165 mode = Mode.DRY;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
166 continue;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
167 }
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
168
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2652
diff changeset
169 // TODO trigger area calculation
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parents:
diff changeset
170 if (Math.abs(p1.getX() - p2.getX()) < EPSILON) {
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
171 // vertical line
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
172 switch (mode) {
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
173 case WET:
938
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diff changeset
174 log.debug("vertical/wet");
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175 mode = Mode.DRY;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
176 result.add(new Line2D.Double(
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
177 startX, waterLevel,
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
178 p1.getX(), waterLevel));
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
179 break;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
180 case DRY:
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diff changeset
181 log.debug("vertical/dry");
933
34136924661b Generate water level lines for given cross section.
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parents:
diff changeset
182 mode = Mode.WET;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
183 startX = p2.getX();
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
184 break;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
185 default: // UNDEF
938
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diff changeset
186 log.debug("vertical/undef");
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34136924661b Generate water level lines for given cross section.
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parents:
diff changeset
187 if (p2.getY() < waterLevel) {
34136924661b Generate water level lines for given cross section.
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parents:
diff changeset
188 mode = Mode.WET;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
189 startX = p2.getX();
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
190 }
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
191 else {
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
192 mode = Mode.DRY;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
193 }
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
194 }
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
195 continue;
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
196 }
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
197
938
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198 // check if waterlevel directly hits the vertices;
bd3683453928 Debugged the water fill algorithm.
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diff changeset
199
bd3683453928 Debugged the water fill algorithm.
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diff changeset
200 boolean p1W = Math.abs(waterLevel - p1.getY()) < EPSILON;
bd3683453928 Debugged the water fill algorithm.
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parents: 934
diff changeset
201 boolean p2W = Math.abs(waterLevel - p2.getY()) < EPSILON;
bd3683453928 Debugged the water fill algorithm.
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diff changeset
202
2673
0143b44631cc Beginnings of mittlere hoehe calculation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2652
diff changeset
203 // TODO trigger area calculation
938
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
204 if (p1W || p2W) {
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
205 if (debug) {
bd3683453928 Debugged the water fill algorithm.
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parents: 934
diff changeset
206 log.debug("water hits vertex: " + p1 + " " + p2 + " " + mode);
bd3683453928 Debugged the water fill algorithm.
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parents: 934
diff changeset
207 }
bd3683453928 Debugged the water fill algorithm.
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parents: 934
diff changeset
208 if (p1W && p2W) { // parallel to water -> dry
bd3683453928 Debugged the water fill algorithm.
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parents: 934
diff changeset
209 log.debug("water hits both vertices");
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
210 if (mode == Mode.WET) {
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
211 result.add(new Line2D.Double(
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
212 startX, waterLevel,
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
213 p1.getX(), waterLevel));
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
214 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
215 mode = Mode.DRY;
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
216 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
217 else if (p1W) { // p1 == waterlevel
bd3683453928 Debugged the water fill algorithm.
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parents: 934
diff changeset
218 log.debug("water hits first vertex");
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
219 if (p2.getY() > waterLevel) { // --> dry
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
220 if (mode == Mode.WET) {
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
221 result.add(new Line2D.Double(
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
222 startX, waterLevel,
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
223 p1.getX(), waterLevel));
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
224 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
225 mode = Mode.DRY;
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
226 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
227 else { // --> wet
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
228 if (mode != Mode.WET) {
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
229 startX = p1.getX();
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
230 mode = Mode.WET;
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
231 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
232 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
233 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
234 else { // p2 == waterlevel
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
235 log.debug("water hits second vertex");
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
236 if (p1.getY() > waterLevel) { // --> wet
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
237 if (mode != Mode.WET) {
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
238 startX = p2.getX();
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
239 mode = Mode.WET;
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
240 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
241 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
242 else { // --> dry
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
243 if (mode == Mode.WET) {
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
244 result.add(new Line2D.Double(
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
245 startX, waterLevel,
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
246 p2.getX(), waterLevel));
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
247 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
248 mode = Mode.DRY;
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
249 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
250 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
251 if (debug) {
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
252 log.debug("mode is now: " + mode);
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
253 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
254 continue;
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
255 }
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
256
2673
0143b44631cc Beginnings of mittlere hoehe calculation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2652
diff changeset
257 // TODO trigger area calculation
933
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
258 // intersection case
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
259 double x = Linear.linear(
34136924661b Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
260 waterLevel,
938
bd3683453928 Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 934
diff changeset
261 p1.getY(), p2.getY(),
bd3683453928 Debugged the water fill algorithm.
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262 p1.getX(), p2.getX());
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263
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264 if (debug) {
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265 log.debug("intersection p1:" + p1);
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266 log.debug("intersection p2:" + p2);
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267 log.debug("intersection at x: " + x);
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268 }
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269
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270 switch (mode) {
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271 case WET:
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272 log.debug("intersect/wet");
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273 mode = Mode.DRY;
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274 result.add(new Line2D.Double(
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275 startX, waterLevel,
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276 x, waterLevel));
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277 break;
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278
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279 case DRY:
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280 log.debug("intersect/dry");
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281 mode = Mode.WET;
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282 startX = x;
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283 break;
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284
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285 default: // UNDEF
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286 log.debug("intersect/undef");
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287 if (p2.getY() > waterLevel) {
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288 log.debug("intersect/undef/over");
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289 mode = Mode.DRY;
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290 result.add(new Line2D.Double(
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291 p1.getX(), waterLevel,
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292 x, waterLevel));
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293 }
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294 else {
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295 mode = Mode.WET;
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296 startX = x;
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297 }
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298 } // switch mode
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299 } // for all points p[i] and p[i-1]
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300
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301 if (mode == Mode.WET) {
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302 result.add(new Line2D.Double(
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303 startX, waterLevel,
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304 maxX, waterLevel));
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305 }
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306
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307 return new ListWithArea(result, area);
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308 }
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309
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310
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311 /**
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312 * Class holding points that form lines and the calculated length.
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313 */
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314 public static class LineData {
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315 public double [][] points;
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316 public double width;
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317 public double area;
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318 public LineData(double[][] points, double width, double area) {
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319 this.points = points;
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320 this.width = width;
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321 this.area = area;
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322 }
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323 }
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324
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325
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326 public static LineData createWaterLines(
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327 List<Point2D> points,
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328 double waterlevel
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diff changeset
329 ) {
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diff changeset
330 ListWithArea listAndArea = fillWater(points, waterlevel);
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diff changeset
331 List<Line2D> lines = listAndArea.lines;
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332
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333 TDoubleArrayList lxs = new TDoubleArrayList();
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diff changeset
334 TDoubleArrayList lys = new TDoubleArrayList();
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335 double linesLength = 0.0f;
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336
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337 for (Iterator<Line2D> iter = lines.iterator(); iter.hasNext();) {
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diff changeset
338 Line2D line = iter.next();
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diff changeset
339 Point2D p1 = line.getP1();
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diff changeset
340 Point2D p2 = line.getP2();
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diff changeset
341 lxs.add(p1.getX());
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diff changeset
342 lys.add(p1.getY());
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diff changeset
343 lxs.add(p2.getX());
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diff changeset
344 lys.add(p2.getY());
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diff changeset
345
9d2a06c3a134 Added DataType for lines that also stores width, use it. Added HasLabel interface for some series.
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diff changeset
346 // Length calculation.
9d2a06c3a134 Added DataType for lines that also stores width, use it. Added HasLabel interface for some series.
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diff changeset
347 double xDiff = line.getX1() - line.getX2();
9d2a06c3a134 Added DataType for lines that also stores width, use it. Added HasLabel interface for some series.
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diff changeset
348 double yDiff = line.getY1() - line.getY2();
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diff changeset
349 linesLength += Math.sqrt(xDiff*xDiff + yDiff*yDiff);
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diff changeset
350
1651
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diff changeset
351 if (iter.hasNext()) {
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diff changeset
352 lxs.add(Double.NaN);
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diff changeset
353 lys.add(Double.NaN);
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diff changeset
354 }
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parents: 938
diff changeset
355 }
a7def20539fb flys/issue317: Removed dependency from cross section demo app.
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diff changeset
356
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diff changeset
357 return new LineData(
9d2a06c3a134 Added DataType for lines that also stores width, use it. Added HasLabel interface for some series.
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diff changeset
358 new double [][] { lxs.toNativeArray(), lys.toNativeArray() },
2674
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diff changeset
359 linesLength, listAndArea.area
2652
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diff changeset
360 );
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diff changeset
361 }
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diff changeset
362 }
34136924661b Generate water level lines for given cross section.
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parents:
diff changeset
363 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org