Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/geom/Lines.java @ 2259:0dcb8326be08
Add a not-yet-looked-at CSV facet for Reference Curve.
flys-artifacts/trunk@3914 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Mon, 06 Feb 2012 10:15:41 +0000 |
parents | a7def20539fb |
children | a6fa128e4654 |
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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13 |
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14 import gnu.trove.TDoubleArrayList; |
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15 |
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16 public class Lines |
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17 { |
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18 private static Logger log = Logger.getLogger(Lines.class); |
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19 |
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20 public static final double EPSILON = 1e-4; |
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21 |
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22 public static enum Mode { UNDEF, WET, DRY }; |
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23 |
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24 protected Lines() { |
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25 } |
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26 |
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27 public static List<Line2D> fillWater(List<Point2D> points, double waterLevel) { |
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28 |
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29 boolean debug = log.isDebugEnabled(); |
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30 |
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31 if (debug) { |
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32 log.debug("fillWater"); |
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33 log.debug("----------------------------"); |
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34 } |
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35 |
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36 List<Line2D> result = new ArrayList(); |
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37 |
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38 int N = points.size(); |
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39 |
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40 if (N == 0) { |
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41 return result; |
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42 } |
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43 |
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44 if (N == 1) { |
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45 Point2D p = points.get(0); |
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46 // Only generate point if over water |
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47 if (waterLevel > p.getY()) { |
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48 result.add(new Line2D.Double( |
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49 p.getX(), waterLevel, |
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50 p.getX(), waterLevel)); |
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51 } |
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52 return result; |
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53 } |
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54 |
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55 double minX = Double.MAX_VALUE; |
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56 double minY = Double.MAX_VALUE; |
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57 double maxX = -Double.MAX_VALUE; |
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58 double maxY = -Double.MAX_VALUE; |
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59 |
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60 // To ensure for sequences of equals x's that |
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61 // the original index order is preserved. |
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62 for (Point2D p: points) { |
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63 double x = p.getX(), y = p.getY(); |
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64 if (x < minX) minX = x; |
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65 if (x > maxX) maxX = x; |
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66 if (y < minY) minY = y; |
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67 if (y > maxY) maxY = y; |
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68 } |
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69 |
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70 if (minY > waterLevel) { // profile completely over water level |
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71 log.debug("complete over water"); |
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72 return result; |
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73 } |
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74 |
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75 if (waterLevel > maxY) { // water floods profile |
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76 log.debug("complete under water"); |
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77 result.add(new Line2D.Double(minX, waterLevel, maxX, waterLevel)); |
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78 return result; |
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79 } |
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80 |
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81 Mode mode = Mode.UNDEF; |
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82 |
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83 double startX = minX; |
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84 |
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85 for (int i = 1; i < N; ++i) { |
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86 Point2D p1 = points.get(i-1); |
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87 Point2D p2 = points.get(i); |
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88 |
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89 if (p1.getY() < waterLevel && p2.getY() < waterLevel) { |
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90 // completely under water |
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91 if (debug) { |
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92 log.debug("under water: " + p1 + " " + p2); |
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93 } |
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94 if (mode != Mode.WET) { |
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95 startX = p1.getX(); |
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96 mode = Mode.WET; |
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97 } |
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98 continue; |
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99 } |
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100 |
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101 if (p1.getY() > waterLevel && p2.getY() > waterLevel) { |
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102 if (debug) { |
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103 log.debug("over water: " + p1 + " " + p2); |
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104 } |
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105 // completely over water |
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106 if (mode == Mode.WET) { |
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107 log.debug("over/wet"); |
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108 result.add(new Line2D.Double( |
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109 startX, waterLevel, |
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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) { |
34136924661b
Generate water level lines for given cross section.
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117 // vertical line |
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Generate water level lines for given cross section.
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118 switch (mode) { |
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Generate water level lines for given cross section.
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119 case WET: |
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120 log.debug("vertical/wet"); |
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121 mode = Mode.DRY; |
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Generate water level lines for given cross section.
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122 result.add(new Line2D.Double( |
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Generate water level lines for given cross section.
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123 startX, waterLevel, |
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Generate water level lines for given cross section.
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124 p1.getX(), waterLevel)); |
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Generate water level lines for given cross section.
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125 break; |
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Generate water level lines for given cross section.
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126 case DRY: |
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127 log.debug("vertical/dry"); |
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128 mode = Mode.WET; |
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Generate water level lines for given cross section.
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129 startX = p2.getX(); |
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Generate water level lines for given cross section.
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130 break; |
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Generate water level lines for given cross section.
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131 default: // UNDEF |
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132 log.debug("vertical/undef"); |
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133 if (p2.getY() < waterLevel) { |
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Generate water level lines for given cross section.
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134 mode = Mode.WET; |
34136924661b
Generate water level lines for given cross section.
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135 startX = p2.getX(); |
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Generate water level lines for given cross section.
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136 } |
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Generate water level lines for given cross section.
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137 else { |
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Generate water level lines for given cross section.
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138 mode = Mode.DRY; |
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Generate water level lines for given cross section.
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139 } |
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Generate water level lines for given cross section.
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140 } |
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Generate water level lines for given cross section.
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141 continue; |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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142 } |
34136924661b
Generate water level lines for given cross section.
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143 |
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Debugged the water fill algorithm.
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144 // check if waterlevel directly hits the vertices; |
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Debugged the water fill algorithm.
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145 |
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Debugged the water fill algorithm.
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146 boolean p1W = Math.abs(waterLevel - p1.getY()) < EPSILON; |
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Debugged the water fill algorithm.
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147 boolean p2W = Math.abs(waterLevel - p2.getY()) < EPSILON; |
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148 |
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Debugged the water fill algorithm.
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149 if (p1W || p2W) { |
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Debugged the water fill algorithm.
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150 if (debug) { |
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151 log.debug("water hits vertex: " + p1 + " " + p2 + " " + mode); |
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Debugged the water fill algorithm.
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152 } |
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Debugged the water fill algorithm.
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153 if (p1W && p2W) { // parallel to water -> dry |
bd3683453928
Debugged the water fill algorithm.
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154 log.debug("water hits both vertices"); |
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Debugged the water fill algorithm.
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155 if (mode == Mode.WET) { |
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Debugged the water fill algorithm.
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156 result.add(new Line2D.Double( |
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Debugged the water fill algorithm.
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157 startX, waterLevel, |
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Debugged the water fill algorithm.
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158 p1.getX(), waterLevel)); |
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Debugged the water fill algorithm.
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159 } |
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Debugged the water fill algorithm.
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160 mode = Mode.DRY; |
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Debugged the water fill algorithm.
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161 } |
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Debugged the water fill algorithm.
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162 else if (p1W) { // p1 == waterlevel |
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Debugged the water fill algorithm.
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163 log.debug("water hits first vertex"); |
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Debugged the water fill algorithm.
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164 if (p2.getY() > waterLevel) { // --> dry |
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Debugged the water fill algorithm.
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165 if (mode == Mode.WET) { |
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Debugged the water fill algorithm.
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166 result.add(new Line2D.Double( |
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Debugged the water fill algorithm.
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167 startX, waterLevel, |
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Debugged the water fill algorithm.
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168 p1.getX(), waterLevel)); |
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Debugged the water fill algorithm.
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169 } |
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Debugged the water fill algorithm.
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170 mode = Mode.DRY; |
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Debugged the water fill algorithm.
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171 } |
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Debugged the water fill algorithm.
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172 else { // --> wet |
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Debugged the water fill algorithm.
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173 if (mode != Mode.WET) { |
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Debugged the water fill algorithm.
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174 startX = p1.getX(); |
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Debugged the water fill algorithm.
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175 mode = Mode.WET; |
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Debugged the water fill algorithm.
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176 } |
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Debugged the water fill algorithm.
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177 } |
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Debugged the water fill algorithm.
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178 } |
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Debugged the water fill algorithm.
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179 else { // p2 == waterlevel |
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Debugged the water fill algorithm.
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180 log.debug("water hits second vertex"); |
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Debugged the water fill algorithm.
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181 if (p1.getY() > waterLevel) { // --> wet |
bd3683453928
Debugged the water fill algorithm.
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182 if (mode != Mode.WET) { |
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Debugged the water fill algorithm.
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183 startX = p2.getX(); |
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Debugged the water fill algorithm.
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184 mode = Mode.WET; |
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Debugged the water fill algorithm.
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185 } |
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Debugged the water fill algorithm.
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186 } |
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Debugged the water fill algorithm.
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187 else { // --> dry |
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Debugged the water fill algorithm.
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188 if (mode == Mode.WET) { |
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Debugged the water fill algorithm.
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189 result.add(new Line2D.Double( |
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Debugged the water fill algorithm.
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190 startX, waterLevel, |
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Debugged the water fill algorithm.
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191 p2.getX(), waterLevel)); |
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Debugged the water fill algorithm.
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192 } |
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Debugged the water fill algorithm.
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193 mode = Mode.DRY; |
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Debugged the water fill algorithm.
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194 } |
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Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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|
195 } |
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Debugged the water fill algorithm.
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196 if (debug) { |
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Debugged the water fill algorithm.
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197 log.debug("mode is now: " + mode); |
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Debugged the water fill algorithm.
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198 } |
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Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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199 continue; |
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Debugged the water fill algorithm.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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|
200 } |
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Debugged the water fill algorithm.
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201 |
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Generate water level lines for given cross section.
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202 // intersection case |
34136924661b
Generate water level lines for given cross section.
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203 double x = Linear.linear( |
34136924661b
Generate water level lines for given cross section.
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204 waterLevel, |
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Debugged the water fill algorithm.
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205 p1.getY(), p2.getY(), |
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Debugged the water fill algorithm.
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206 p1.getX(), p2.getX()); |
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Debugged the water fill algorithm.
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207 |
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Debugged the water fill algorithm.
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208 if (debug) { |
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Debugged the water fill algorithm.
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209 log.debug("intersection p1:" + p1); |
bd3683453928
Debugged the water fill algorithm.
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210 log.debug("intersection p2:" + p2); |
bd3683453928
Debugged the water fill algorithm.
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211 log.debug("intersection at x: " + x); |
bd3683453928
Debugged the water fill algorithm.
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212 } |
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Generate water level lines for given cross section.
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213 |
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Generate water level lines for given cross section.
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214 switch (mode) { |
34136924661b
Generate water level lines for given cross section.
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215 case WET: |
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Debugged the water fill algorithm.
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216 log.debug("intersect/wet"); |
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Generate water level lines for given cross section.
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217 mode = Mode.DRY; |
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Generate water level lines for given cross section.
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218 result.add(new Line2D.Double( |
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Generate water level lines for given cross section.
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219 startX, waterLevel, |
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Generate water level lines for given cross section.
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220 x, waterLevel)); |
34136924661b
Generate water level lines for given cross section.
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221 break; |
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Generate water level lines for given cross section.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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222 |
34136924661b
Generate water level lines for given cross section.
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223 case DRY: |
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224 log.debug("intersect/dry"); |
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Generate water level lines for given cross section.
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225 mode = Mode.WET; |
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Generate water level lines for given cross section.
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226 startX = x; |
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Generate water level lines for given cross section.
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227 break; |
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Generate water level lines for given cross section.
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228 |
34136924661b
Generate water level lines for given cross section.
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parents:
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229 default: // UNDEF |
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230 log.debug("intersect/undef"); |
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Generate water level lines for given cross section.
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231 if (p2.getY() > waterLevel) { |
938
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232 log.debug("intersect/undef/over"); |
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Generate water level lines for given cross section.
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233 mode = Mode.DRY; |
34136924661b
Generate water level lines for given cross section.
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parents:
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234 result.add(new Line2D.Double( |
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235 p1.getX(), waterLevel, |
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236 x, waterLevel)); |
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237 } |
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238 else { |
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239 mode = Mode.WET; |
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240 startX = x; |
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241 } |
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242 } // switch mode |
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243 } // for all points p[i] and p[i-1] |
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244 |
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245 if (mode == Mode.WET) { |
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246 result.add(new Line2D.Double( |
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247 startX, waterLevel, |
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248 maxX, waterLevel)); |
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249 } |
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250 |
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251 return result; |
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252 } |
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253 |
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254 public static double [][] createWaterLines( |
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255 List<Point2D> points, |
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256 double waterlevel |
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257 ) { |
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258 List<Line2D> lines = fillWater(points, waterlevel); |
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259 |
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260 TDoubleArrayList lxs = new TDoubleArrayList(); |
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261 TDoubleArrayList lys = new TDoubleArrayList(); |
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262 |
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263 for (Iterator<Line2D> iter = lines.iterator(); iter.hasNext();) { |
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264 Line2D l = iter.next(); |
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265 Point2D p1 = l.getP1(); |
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266 Point2D p2 = l.getP2(); |
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267 lxs.add(p1.getX()); |
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268 lys.add(p1.getY()); |
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269 lxs.add(p2.getX()); |
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270 lys.add(p2.getY()); |
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271 if (iter.hasNext()) { |
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272 lxs.add(Double.NaN); |
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273 lys.add(Double.NaN); |
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274 } |
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275 } |
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276 |
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277 return new double [][] { lxs.toNativeArray(), lys.toNativeArray() }; |
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278 } |
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279 } |
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280 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |