1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.g2d.utils.geom;
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14 import java.awt.geom.Point2D;
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15 import java.util.Collection;
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16 import java.util.Collections;
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17 import java.util.HashSet;
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18 import java.util.Set;
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20 import org.simantics.g2d.utils.GeometryUtils;
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23 * A set of compass [0..360) directions
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25 public class DirectionSet extends HashSet<Double> {
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27 public static final DirectionSet NESW = new DirectionSet(0.0, 90.0, 180.0, 270.0);
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29 public static final DirectionSet N = new DirectionSet(0.0);
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30 public static final DirectionSet NE = new DirectionSet(0.0, 90.0);
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31 public static final DirectionSet E = new DirectionSet(90.0);
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32 public static final DirectionSet SE = new DirectionSet(90.0,180.0);
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33 public static final DirectionSet S = new DirectionSet(180.0);
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34 public static final DirectionSet SW = new DirectionSet(180.0, 270.0);
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35 public static final DirectionSet W = new DirectionSet(270.0);
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36 public static final DirectionSet NW = new DirectionSet(270.0, 0.0);
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38 public static final DirectionSet NE2 = new DirectionSet(0.0, 90.0, 45.0);
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39 public static final DirectionSet SE2 = new DirectionSet(90.0,180.0, 135.0);
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40 public static final DirectionSet SW2 = new DirectionSet(180.0, 270.0, 225.0);
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41 public static final DirectionSet NW2 = new DirectionSet(270.0, 0.0, 315.0);
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43 public static final DirectionSet HORIZ = new DirectionSet(90.0, 270.0);
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44 public static final DirectionSet VERT = new DirectionSet(0.0, 180.0);
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45 public static final DirectionSet ANY =
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47 0, 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180,
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48 195, 210, 225, 240, 255, 270, 285, 300, 315, 330, 345);
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50 private Set<Point2D> unitVectors;
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52 public DirectionSet(double ... directions)
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54 for (double d : directions)
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58 private static final long serialVersionUID = 1L;
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59 private boolean add(double e) {
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60 if (e<0 || e>=360.0) e = Math.IEEEremainder(e, 360.0);
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61 if (e<0) e = 360.0-e;
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62 return super.add(e);
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65 public boolean add(Double e) {
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67 if (e==null) return false;
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68 return add((double)e);
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71 public boolean addAll(Collection<? extends Double> c) {
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73 return super.addAll(c);
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76 public boolean remove(Object o) {
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78 return super.remove(o);
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81 public boolean removeAll(Collection<?> c) {
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83 return super.removeAll(c);
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86 public void clear() {
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91 public Double getClosestDirection(double d2)
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93 Double closest = null;
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94 for (Double d1 : this)
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96 double diff = d1>180==d2>180 ? Math.abs(d1-d2) : d1<d2 ? d1-d2+360 : d2-d1+360;
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97 if (closest==null || closest<diff)
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102 public Double getClosestDirection(double d2, double tolerance)
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104 Double closest = null;
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105 for (Double d1 : this)
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107 double diff = d1>180==d2>180 ? Math.abs(d1-d2) : d1<d2 ? d1-d2+360 : d2-d1+360;
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108 if (diff>tolerance) continue;
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109 if (closest==null || closest<diff)
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116 * Create direction set of inverse directions
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119 public DirectionSet createInverse()
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121 DirectionSet result = new DirectionSet();
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122 for (double dir : this)
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125 if (dir>360.0) dir-=360.0;
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133 * Get directions as unit vectors
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134 * @return collection where to add unit vectors
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136 private Set<Point2D> createUnitVectors() {
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137 HashSet<Point2D> result = new HashSet<Point2D>(size());
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138 for (double d : this)
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139 result.add( GeometryUtils.toUnitVector(d, new Point2D.Double()) );
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143 public Set<Point2D> getUnitVectors() {
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144 if (unitVectors==null) {
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145 unitVectors = createUnitVectors();
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146 unitVectors = Collections.unmodifiableSet(unitVectors);
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148 return unitVectors;
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