Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/math/GridCell.java @ 1116:2d393d79c097

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Added author names. gnv-artifacts/trunk@1262 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 04 Nov 2010 21:46:58 +0000
parents f953c9a559d8
children
rev   line source
1115
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.gnv.math;
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10
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11 import com.vividsolutions.jts.algorithm.CGAlgorithms;
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12
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13 import com.vividsolutions.jts.geom.Coordinate;
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14 import com.vividsolutions.jts.geom.Envelope;
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15 import com.vividsolutions.jts.geom.Geometry;
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16 import com.vividsolutions.jts.geom.GeometryFactory;
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17 import com.vividsolutions.jts.geom.LinearRing;
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18 import com.vividsolutions.jts.geom.Point;
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19 import com.vividsolutions.jts.geom.Polygon;
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20
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21 import com.vividsolutions.jts.index.ItemVisitor;
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22
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23 import java.io.Serializable;
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24
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25 import java.util.ArrayList;
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26 import java.util.HashMap;
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27 import java.util.List;
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28
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29 import org.apache.log4j.Logger;
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30
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31 /**
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32 * Spans a rectangle of points to be used in spatial indexing.
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33 *
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34 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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35 */
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36 public class GridCell
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37 implements Serializable
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38 {
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39 private static Logger log = Logger.getLogger(GridCell.class);
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40
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41 /**
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42 * Callback for {@link com.vividsolutions.jts.index.SpatialIndex}
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43 * to find a GridCell which contains a given point.
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44 */
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45 public static final class CellFinder
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46 implements ItemVisitor
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47 {
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48 /**
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49 * Stores the found GridCell.
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50 */
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51 public GridCell found;
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52
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53 /**
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54 * The query point.
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55 */
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56 protected Point point;
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57
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58 /**
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59 * Default constructor.
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60 */
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61 public CellFinder() {
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62 }
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63
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64 /**
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65 * Prepares a spatial index lookup.
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66 * @param center The query point.
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67 */
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68 public void prepare(Coordinate center) {
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69 found = null;
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70 point = GEOMETRY_FACTORY.createPoint(center);
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71 }
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72
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73 /**
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74 * Called by the spatial index as a 2nd order filter.
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75 * @param item The GridCell to test.
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76 */
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77 public void visitItem(Object item) {
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78 if (found == null) {
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79 GridCell cell = (GridCell)item;
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80 if (cell.contains(point)) {
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81 found = cell;
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82 }
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83 }
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84 }
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85 } // class CellFinder
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86
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87 /**
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88 * The first point.
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89 */
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90 public Point2d p1;
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91 /**
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92 * The second point.
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93 */
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94 public Point2d p2;
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95 /**
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96 * The third point.
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97 */
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98 public Point2d p3;
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99 /**
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100 * The fourth point.
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101 */
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102 public Point2d p4;
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103
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104 /**
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105 * Polygon created from the four points.
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106 */
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107 protected Polygon polygon;
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108
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109 /**
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110 * Geometry factory to create the query points and the polygons.
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111 */
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112 public static final GeometryFactory GEOMETRY_FACTORY
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113 = new GeometryFactory();
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114
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115 /**
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116 * Default constructor.
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117 */
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118 public GridCell() {
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119 }
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120
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121 /**
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122 * Constructor to create a GridCell out of four given points..
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123 * @param p1 The first point.
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124 * @param p2 The second point.
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125 * @param p3 The thrid point.
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126 * @param p4 The fourth point.
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127 */
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128 public GridCell(Point2d p1, Point2d p2, Point2d p3, Point2d p4) {
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129 this.p1 = p1;
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130 this.p2 = p2;
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131 this.p3 = p3;
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132 this.p4 = p4;
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133 createPolygon();
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134 }
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135
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136 /**
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137 * Creates the polygon from the four points.
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138 */
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139 protected void createPolygon() {
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140 Coordinate [] coords = new Coordinate [] { p1, p2, p3, p4, p1 };
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141 if (!CGAlgorithms.isCCW(coords)) {
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142 for (int i = 0, j = coords.length-1; i < j; ++i, --j) {
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143 Coordinate c = coords[i];
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144 coords[i] = coords[j];
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145 coords[j] = c;
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146 }
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147 }
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148 LinearRing shell = GEOMETRY_FACTORY
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149 .createLinearRing(coords);
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150
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151 if (!shell.isValid()) {
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152 log.warn("linear ring is not valid");
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153 }
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154
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155 polygon = GEOMETRY_FACTORY.createPolygon(shell, null);
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156 }
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157
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158 /**
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159 * Returns the envelope of the four point polygon.
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160 * @return the envelope.
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161 */
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162 public Envelope getEnvelope() {
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163 return polygon.getEnvelopeInternal();
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164 }
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165
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166 /**
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167 * Test if a given point is inside this grid cell.
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168 * @param coord
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169 * @return true, if this grid cell contains the given point - otherwise
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170 * false.
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171 */
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172 public boolean contains(Geometry coord) {
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173 return polygon.contains(coord);
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174 }
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175
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176 /**
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177 * Converts a list of points to a list of grid cells.
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178 * @param points This list of points.
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179 * @return This list of grid cells.
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180 */
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181 public static List<GridCell> pointsToGridCells(
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182 List<? extends Point2d> points
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183 ) {
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184 return pointsToGridCells(points, null);
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185 }
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186
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187 /**
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188 * Converts a list of points to a list of grid cells.
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189 * Points that are not in a relevant area are ignored.
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190 * @param points The list of points.
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191 * @param relevantArea The relevant area.
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192 * @return The list of grid cells.
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193 */
517
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194 public static List<GridCell> pointsToGridCells(
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195 List<? extends Point2d> points,
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196 Envelope relevantArea
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197 ) {
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198 return pointsToGridCells(points, relevantArea, 0);
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199 }
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200
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201 private static final int NEIGHBORS [][] = {
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202 { -1, -1 }, // 0
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203 { -1, 0 }, // 1
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204 { -1, +1 }, // 2
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205 { 0, +1 }, // 3
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206 { +1, +1 }, // 4
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207 { +1, 0 }, // 5
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208 { +1, -1 }, // 6
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209 { 0, -1 } // 7
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210 };
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211
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212 /**
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213 * Generate points by extrapolating border points.
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214 * @param rows (i, j) indexed map of points.
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215 * @param minI min known i.
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216 * @param maxI max known i.
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217 * @param minJ min known j.
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218 * @param maxJ max known j.
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219 * @param rounds Deternine how many extra rings should be generated.
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220 * @param relevantArea The relevant area.
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221 * @return number of newly generated points.
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222 */
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223 public static int extrapolate(
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224 HashMap<Integer, HashMap<Integer, Point2d>> rows,
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225 int minI, int maxI,
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226 int minJ, int maxJ,
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227 int rounds,
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228 Envelope relevantArea
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229 ) {
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230 Point2d [] neighbors = new Point2d[NEIGHBORS.length];
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231 Point2d [] positions = new Point2d[NEIGHBORS.length];
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232
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233 int total = 0;
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234
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235 ArrayList<ArrayList<IJKey>> prio =
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236 new ArrayList<ArrayList<IJKey>>(NEIGHBORS.length);
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237
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238 for (int i = 0; i < NEIGHBORS.length; ++i) {
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239 prio.add(new ArrayList<IJKey>());
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240 }
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241
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242 while (rounds-- > 0) {
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243 for (int i = minI; i <= maxI; ++i) {
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244 for (int j = minJ; j <= maxJ; ++j) {
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245 Point2d p = get(rows, i, j);
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246 if (p != null) {
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247 continue;
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248 }
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249
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250 int count = 0;
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251
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252 for (int k = 0; k < neighbors.length; ++k) {
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diff changeset
253 neighbors[k] = positions[k] = null;
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
254 int dij [] = NEIGHBORS[k];
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
255 Point2d n1 = get(rows, i+ dij[0], j+ dij[1]);
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
256 Point2d n2 = get(rows, i+2*dij[0], j+2*dij[1]);
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
257 if (n1 != null && n2 != null) {
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
258 ++count;
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
259 }
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
260 }
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
261
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
262 if (count > 0) {
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
263 prio.get(count-1).add(new IJKey(i, j));
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
264 }
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
265 } // for all columns
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
266 } // for all rows
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
267
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
268 int N = 0;
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
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parents: 519
diff changeset
269
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
270 for (int l = NEIGHBORS.length-1; l >= 0; --l) {
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
271 ArrayList<IJKey> list = prio.get(l);
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
272 for (IJKey ij: list) {
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
273 int i = ij.i;
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
274 int j = ij.j;
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
275 for (int k = 0; k < neighbors.length; ++k) {
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
276 neighbors[k] = positions[k] = null;
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
277 int dij [] = NEIGHBORS[k];
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
278 Point2d n1 = get(rows, i+ dij[0], j+ dij[1]);
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
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parents: 519
diff changeset
279 Point2d n2 = get(rows, i+2*dij[0], j+2*dij[1]);
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parents: 519
diff changeset
280 if (n1 != null && n2 != null) {
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parents: 519
diff changeset
281 neighbors[k] = n1;
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parents: 519
diff changeset
282 positions[k] = n1.extrapolate(-1d, n2);
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parents: 519
diff changeset
283 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
284 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
285
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
286 Point2d avg = Point2d.average(positions);
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
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parents: 519
diff changeset
287
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
288 if (avg != null && avg.near(positions)
801
d766fe2d917a More javadoc.
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parents: 780
diff changeset
289 && (relevantArea == null
d766fe2d917a More javadoc.
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parents: 780
diff changeset
290 || relevantArea.contains(avg.x, avg.y))) {
593
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
291 avg.i = i;
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
292 avg.j = j;
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
293 avg.inverseDistanceWeighting(neighbors);
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
294 put(rows, avg, i, j);
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parents: 519
diff changeset
295 }
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
296 }
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
297 N += list.size();
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
298 list.clear();
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
299 }
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
300
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
301 if (N == 0) {
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
302 break;
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
303 }
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
304 total += N;
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
305 } // for all rounds
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
306
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
307 return total;
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
308 }
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
309
807
a645bd23c1c8 Added more javadoc. Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 801
diff changeset
310 /**
a645bd23c1c8 Added more javadoc. Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 801
diff changeset
311 * Converts a list of points to a list of grid cells.
a645bd23c1c8 Added more javadoc. Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 801
diff changeset
312 * @param points The list of points.
a645bd23c1c8 Added more javadoc. Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 801
diff changeset
313 * @param relevantArea The relevant area. If a point is
a645bd23c1c8 Added more javadoc. Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 801
diff changeset
314 * not inside this area it is ignored during the build process.
a645bd23c1c8 Added more javadoc. Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 801
diff changeset
315 * @param extrapolationRounds Number of extra point rings.
a645bd23c1c8 Added more javadoc. Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 801
diff changeset
316 * 0 = no extrpolation.
a645bd23c1c8 Added more javadoc. Removed trailing whitespace.
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parents: 801
diff changeset
317 * @return The list of grid cells.
a645bd23c1c8 Added more javadoc. Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 801
diff changeset
318 */
593
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
319 public static List<GridCell> pointsToGridCells(
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
320 List<? extends Point2d> points,
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
321 Envelope relevantArea,
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
322 int extrapolationRounds
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
323 ) {
514
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
324 int minI = Integer.MAX_VALUE;
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
325 int maxI = Integer.MIN_VALUE;
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
326 int minJ = Integer.MAX_VALUE;
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
327 int maxJ = Integer.MIN_VALUE;
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
328
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
329 HashMap<Integer, HashMap<Integer, Point2d>> rows =
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
330 new HashMap<Integer, HashMap<Integer, Point2d>>();
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
331
517
96a1e92e7ed2 If the number of data points to generate a "Horizontalschnitt"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
332 int culled = 0;
96a1e92e7ed2 If the number of data points to generate a "Horizontalschnitt"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
333
514
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
334 for (Point2d p: points) {
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
335
517
96a1e92e7ed2 If the number of data points to generate a "Horizontalschnitt"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
336 if (relevantArea != null && !relevantArea.contains(p.x, p.y)) {
96a1e92e7ed2 If the number of data points to generate a "Horizontalschnitt"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
337 ++culled;
96a1e92e7ed2 If the number of data points to generate a "Horizontalschnitt"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
338 continue;
96a1e92e7ed2 If the number of data points to generate a "Horizontalschnitt"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
339 }
96a1e92e7ed2 If the number of data points to generate a "Horizontalschnitt"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 514
diff changeset
340
514
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
341 if (p.i < minI) minI = p.i;
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
342 if (p.i > maxI) maxI = p.i;
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
343 if (p.j < minJ) minJ = p.j;
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
344 if (p.j > maxJ) maxJ = p.j;
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
345
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
346 HashMap<Integer, Point2d> row = rows.get(p.i);
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
347
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
348 if (row == null) {
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
349 rows.put(p.i, row = new HashMap<Integer, Point2d>());
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
350 }
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
351
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
352 row.put(p.j, p);
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
353 }
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
354
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
355 ArrayList<GridCell> cells = new ArrayList<GridCell>(points.size());
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
356
593
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
357 int extrapolated = extrapolate(
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
358 rows,
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
359 minI, maxI,
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
360 minJ, maxJ,
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
361 extrapolationRounds,
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
362 relevantArea);
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
363
514
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
364 for (int i = minI + 1; i <= maxI; ++i) {
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
365 HashMap<Integer, Point2d> row1 = rows.get(i-1);
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
366 HashMap<Integer, Point2d> row2 = rows.get(i);
d9d933e06875 Fixed gnv/issue153
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
367
593
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
368 if (row1 == null || row2 == null) {
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
369 continue;
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
370 }
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
371
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
372 for (int j = minJ + 1; j < maxJ; ++j) {
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
373 Point2d p1 = row1.get(j-1);
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
374 Point2d p2 = row1.get(j);
b248531fa20b Added experimental support for extrapolation in "Horizontalschnitte"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 519
diff changeset
375 Point2d p3 = row2.get(j);
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376 Point2d p4 = row2.get(j-1);
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377
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378 if (p1 != null && p2 != null && p3 != null && p4 != null) {
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379 cells.add(new GridCell(p1, p2, p3, p4));
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380 }
514
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381 }
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382 } // for all rows
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383
519
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384 if (log.isDebugEnabled()) {
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385 log.debug("culled points: " + culled);
593
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386 log.debug("extrapolated points: " + extrapolated);
519
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387 log.debug("min/max i: " + minI + " / " + maxI);
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388 log.debug("min/max j: " + minJ + " / " + maxJ);
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389 log.debug("cells found: " + cells.size());
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390 }
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391
514
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392 return cells;
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393 }
593
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394
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395 private static Point2d get(
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396 HashMap<Integer, HashMap<Integer, Point2d>> rows,
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397 int i, int j
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398 ) {
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399 HashMap<Integer, Point2d> row = rows.get(i);
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400 return row != null ? row.get(j) : null;
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401 }
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diff changeset
402
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403 private static void put(
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404 HashMap<Integer, HashMap<Integer, Point2d>> rows,
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405 Point2d point,
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406 int i, int j
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407 ) {
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408 Integer I = Integer.valueOf(i);
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diff changeset
409 HashMap<Integer, Point2d> row = rows.get(I);
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410 if (row == null) {
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diff changeset
411 rows.put(I, row = new HashMap<Integer, Point2d>());
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412 }
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413 row.put(j, point);
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414 }
514
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415 }
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416 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org