1 | // License: GPL. See LICENSE file for details.
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2 | //
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3 | package org.openstreetmap.josm.actions;
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4 |
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5 | import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
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6 | import static org.openstreetmap.josm.tools.I18n.tr;
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7 |
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8 | import java.awt.event.ActionEvent;
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9 | import java.awt.event.KeyEvent;
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10 | import java.util.ArrayList;
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11 | import java.util.Arrays;
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12 | import java.util.Collection;
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13 | import java.util.Collections;
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14 | import java.util.HashMap;
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15 | import java.util.HashSet;
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16 | import java.util.Iterator;
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17 | import java.util.LinkedList;
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18 | import java.util.List;
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19 | import java.util.Set;
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20 |
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21 | import javax.swing.JOptionPane;
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22 |
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23 | import org.openstreetmap.josm.Main;
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24 | import org.openstreetmap.josm.command.Command;
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25 | import org.openstreetmap.josm.command.MoveCommand;
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26 | import org.openstreetmap.josm.command.SequenceCommand;
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27 | import org.openstreetmap.josm.data.coor.EastNorth;
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28 | import org.openstreetmap.josm.data.osm.Node;
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29 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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30 | import org.openstreetmap.josm.data.osm.Way;
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31 | import org.openstreetmap.josm.gui.ConditionalOptionPaneUtil;
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32 | import org.openstreetmap.josm.tools.Shortcut;
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33 |
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34 | /**
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35 | * Tools / Orthogonalize
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36 | *
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37 | * Align edges of a way so all angles are angles of 90 or 180 degrees.
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38 | * See USAGE String below.
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39 | */
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40 | public final class OrthogonalizeAction extends JosmAction {
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41 | private String USAGE = tr(
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42 | "<h3>When one or more ways are selected, the shape is adjusted such, that all angles are 90 or 180 degrees.</h3>"+
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43 | "You can add two nodes to the selection. Then, the direction is fixed by these two reference nodes. "+
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44 | "(Afterwards, you can undo the movement for certain nodes:<br>"+
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45 | "Select them and press the shortcut for Orthogonalize / Undo. The default is Shift-Q.)");
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46 |
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47 | public OrthogonalizeAction() {
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48 | super(tr("Orthogonalize Shape"),
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49 | "ortho",
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50 | tr("Move nodes so all angles are 90 or 180 degrees"),
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51 | Shortcut.registerShortcut("tools:orthogonalize", tr("Tool: {0}", tr("Orthogonalize Shape")),
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52 | KeyEvent.VK_Q,
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53 | Shortcut.GROUP_EDIT), true);
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54 | putValue("help", ht("/Action/OrthogonalizeShape"));
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55 | }
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56 |
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57 | /**
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58 | * excepted deviation from an angle of 0, 90, 180, 360 degrees
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59 | * maximum value: 45 degrees
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60 | *
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61 | * Current policy is to except just everything, no matter how strange the result would be.
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62 | */
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63 | private static final double TOLERANCE1 = Math.toRadians(45.); // within a way
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64 | private static final double TOLERANCE2 = Math.toRadians(45.); // ways relative to each other
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65 |
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66 | /**
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67 | * Remember movements, so the user can later undo it for certain nodes
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68 | */
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69 | private static final HashMap<Node, EastNorth> rememberMovements = new HashMap<Node, EastNorth>();
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70 |
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71 | /**
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72 | * Undo the previous orthogonalization for certain nodes.
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73 | *
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74 | * This is useful, if the way shares nodes that you don't like to change, e.g. imports or
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75 | * work of another user.
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76 | *
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77 | * This action can be triggered by shortcut only.
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78 | */
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79 | public static class Undo extends JosmAction {
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80 | public Undo() {
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81 | super(tr("Orthogonalize Shape / Undo"),
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82 | "ortho",
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83 | tr("Undo orthogonalization for certain nodes"),
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84 | Shortcut.registerShortcut("tools:orthogonalizeUndo", tr("Tool: {0}", tr("Orthogonalize Shape / Undo")),
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85 | KeyEvent.VK_Q,
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86 | Shortcut.GROUP_EDIT, Shortcut.SHIFT_DEFAULT), false);
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87 | putValue("toolbar", "action/orthogonalize/undo");
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88 | Main.toolbar.register(this);
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89 | }
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90 | public void actionPerformed(ActionEvent e) {
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91 | if (!isEnabled())
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92 | return;
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93 | final Collection<Command> commands = new LinkedList<Command>();
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94 | final Collection<OsmPrimitive> sel = getCurrentDataSet().getSelected();
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95 | try {
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96 | for (OsmPrimitive p : sel) {
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97 | if (! (p instanceof Node)) throw new InvalidUserInputException();
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98 | Node n = (Node) p;
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99 | if (rememberMovements.containsKey(n)) {
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100 | EastNorth tmp = rememberMovements.get(n);
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101 | commands.add(new MoveCommand(n, - tmp.east(), - tmp.north()));
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102 | rememberMovements.remove(n);
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103 | }
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104 | }
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105 | if (commands.size() > 0) {
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106 | Main.main.undoRedo.add(new SequenceCommand(tr("Orthogonalize / Undo"), commands));
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107 | Main.map.repaint();
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108 | } else throw new InvalidUserInputException();
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109 | }
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110 | catch (InvalidUserInputException ex) {
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111 | JOptionPane.showMessageDialog(
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112 | Main.parent,
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113 | tr("Orthogonalize Shape / Undo\n"+
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114 | "Please select nodes that were moved by the previous Orthogonalize Shape action!"),
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115 | tr("Undo Orthogonalize Shape"),
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116 | JOptionPane.INFORMATION_MESSAGE);
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117 | }
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118 | }
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119 | }
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120 |
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121 | public void actionPerformed(ActionEvent e) {
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122 | if (!isEnabled())
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123 | return;
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124 | if ("EPSG:4326".equals(Main.getProjection().toString())) {
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125 | String msg = tr("<html>You are using the EPSG:4326 projection which might lead<br>" +
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126 | "to undesirable results when doing rectangular alignments.<br>" +
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127 | "Change your projection to get rid of this warning.<br>" +
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128 | "Do you want to continue?</html>");
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129 | if (!ConditionalOptionPaneUtil.showConfirmationDialog(
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130 | "align_rectangular_4326",
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131 | Main.parent,
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132 | msg,
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133 | tr("Warning"),
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134 | JOptionPane.YES_NO_OPTION,
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135 | JOptionPane.QUESTION_MESSAGE,
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136 | JOptionPane.YES_OPTION))
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137 | return;
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138 | }
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139 |
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140 | final ArrayList<Node> nodeList = new ArrayList<Node>();
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141 | final ArrayList<WayData> wayDataList = new ArrayList<WayData>();
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142 | final Collection<OsmPrimitive> sel = getCurrentDataSet().getSelected();
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143 |
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144 | try {
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145 | // collect nodes and ways from the selection
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146 | for (OsmPrimitive p : sel) {
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147 | if (p instanceof Node) {
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148 | nodeList.add((Node) p);
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149 | }
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150 | else if (p instanceof Way) {
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151 | wayDataList.add(new WayData((Way) p));
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152 | } else
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153 | throw new InvalidUserInputException(tr("Selection must consist only of ways and nodes."));
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154 | }
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155 | if (wayDataList.isEmpty())
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156 | throw new InvalidUserInputException("usage");
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157 | else {
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158 | if (nodeList.size() == 2 || nodeList.isEmpty()) {
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159 | OrthogonalizeAction.rememberMovements.clear();
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160 | final Collection<Command> commands = new LinkedList<Command>();
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161 |
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162 | if (nodeList.size() == 2) { // fixed direction
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163 | commands.addAll(orthogonalize(wayDataList, nodeList));
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164 | }
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165 | else if (nodeList.isEmpty()) {
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166 | List<ArrayList<WayData>> groups = buildGroups(wayDataList);
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167 | for (ArrayList<WayData> g: groups) {
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168 | commands.addAll(orthogonalize(g, nodeList));
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169 | }
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170 | } else
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171 | throw new IllegalStateException();
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172 |
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173 | Main.main.undoRedo.add(new SequenceCommand(tr("Orthogonalize"), commands));
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174 | Main.map.repaint();
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175 |
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176 | } else
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177 | throw new InvalidUserInputException("usage");
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178 | }
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179 | } catch (InvalidUserInputException ex) {
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180 | if (ex.getMessage().equals("usage")) {
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181 | JOptionPane.showMessageDialog(
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182 | Main.parent,
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183 | "<html><h2>" + tr("Usage") + "</h2>" + USAGE + "</html>",
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184 | tr("Orthogonalize Shape"),
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185 | JOptionPane.INFORMATION_MESSAGE);
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186 | }
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187 | else {
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188 | JOptionPane.showMessageDialog(
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189 | Main.parent,
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190 | "<html>" + ex.getMessage() + "<br><hr><h2>" + tr("Usage") + "</h2>" + USAGE + "</html>",
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191 | tr("Selected Elements cannot be orthogonalized"),
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192 | JOptionPane.INFORMATION_MESSAGE);
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193 | }
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194 | }
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195 | }
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196 |
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197 | /**
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198 | * Collect groups of ways with common nodes in order to orthogonalize each group separately.
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199 | */
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200 | private static List<ArrayList<WayData>> buildGroups(ArrayList<WayData> wayDataList) {
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201 | List<ArrayList<WayData>> groups = new ArrayList<ArrayList<WayData>>();
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202 | Set<WayData> remaining = new HashSet<WayData>(wayDataList);
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203 | while (!remaining.isEmpty()) {
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204 | ArrayList<WayData> group = new ArrayList<WayData>();
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205 | groups.add(group);
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206 | Iterator<WayData> it = remaining.iterator();
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207 | WayData next = it.next();
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208 | it.remove();
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209 | extendGroupRec(group, next, new ArrayList<WayData>(remaining));
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210 | remaining.removeAll(group);
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211 | }
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212 | return groups;
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213 | }
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214 |
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215 | private static void extendGroupRec(List<WayData> group, WayData newGroupMember, List<WayData> remaining) {
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216 | group.add(newGroupMember);
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217 | for (int i = 0; i < remaining.size(); ++i) {
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218 | WayData candidate = remaining.get(i);
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219 | if (candidate == null) continue;
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220 | if (!Collections.disjoint(candidate.way.getNodes(), newGroupMember.way.getNodes())) {
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221 | remaining.set(i, null);
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222 | extendGroupRec(group, candidate, remaining);
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223 | }
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224 | }
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225 | }
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226 |
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227 | /**
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228 | *
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229 | * Outline:
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230 | * 1. Find direction of all segments
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231 | * - direction = 0..3 (right,up,left,down)
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232 | * - right is not really right, you may have to turn your screen
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233 | * 2. Find average heading of all segments
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234 | * - heading = angle of a vector in polar coordinates
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235 | * - sum up horizontal segments (those with direction 0 or 2)
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236 | * - sum up vertical segments
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237 | * - turn the vertical sum by 90 degrees and add it to the horizontal sum
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238 | * - get the average heading from this total sum
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239 | * 3. Rotate all nodes by the average heading so that right is really right
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240 | * and all segments are approximately NS or EW.
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241 | * 4. If nodes are connected by a horizontal segment: Replace their y-Coordinate by
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242 | * the mean value of their y-Coordinates.
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243 | * - The same for vertical segments.
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244 | * 5. Rotate back.
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245 | *
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246 | **/
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247 | private static Collection<Command> orthogonalize(ArrayList<WayData> wayDataList, ArrayList<Node> headingNodes)
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248 | throws InvalidUserInputException
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249 | {
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250 | // find average heading
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251 | double headingAll;
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252 | try {
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253 | if (headingNodes.isEmpty()) {
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254 | // find directions of the segments and make them consistent between different ways
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255 | wayDataList.get(0).calcDirections(Direction.RIGHT);
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256 | double refHeading = wayDataList.get(0).heading;
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257 | for (WayData w : wayDataList) {
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258 | w.calcDirections(Direction.RIGHT);
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259 | int directionOffset = angleToDirectionChange(w.heading - refHeading, TOLERANCE2);
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260 | w.calcDirections(Direction.RIGHT.changeBy(directionOffset));
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261 | if (angleToDirectionChange(refHeading - w.heading, TOLERANCE2) != 0) throw new RuntimeException();
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262 | }
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263 | EastNorth totSum = new EastNorth(0., 0.);
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264 | for (WayData w : wayDataList) {
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265 | totSum = EN.sum(totSum, w.segSum);
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266 | }
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267 | headingAll = EN.polar(new EastNorth(0., 0.), totSum);
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268 | }
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269 | else {
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270 | headingAll = EN.polar(headingNodes.get(0).getEastNorth(), headingNodes.get(1).getEastNorth());
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271 | for (WayData w : wayDataList) {
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272 | w.calcDirections(Direction.RIGHT);
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273 | int directionOffset = angleToDirectionChange(w.heading - headingAll, TOLERANCE2);
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274 | w.calcDirections(Direction.RIGHT.changeBy(directionOffset));
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275 | }
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276 | }
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277 | } catch (RejectedAngleException ex) {
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278 | throw new InvalidUserInputException(
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279 | tr("<html>Please make sure all selected ways head in a similar direction<br>"+
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280 | "or orthogonalize them one by one.</html>"));
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281 | }
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282 |
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283 | // put the nodes of all ways in a set
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284 | final HashSet<Node> allNodes = new HashSet<Node>();
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285 | for (WayData w : wayDataList) {
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286 | for (Node n : w.way.getNodes()) {
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287 | allNodes.add(n);
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288 | }
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289 | }
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290 |
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291 | // the new x and y value for each node
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292 | final HashMap<Node, Double> nX = new HashMap<Node, Double>();
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293 | final HashMap<Node, Double> nY = new HashMap<Node, Double>();
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294 |
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295 | // calculate the centroid of all nodes
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296 | // it is used as rotation center
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297 | EastNorth pivot = new EastNorth(0., 0.);
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298 | for (Node n : allNodes) {
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299 | pivot = EN.sum(pivot, n.getEastNorth());
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300 | }
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301 | pivot = new EastNorth(pivot.east() / allNodes.size(), pivot.north() / allNodes.size());
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302 |
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303 | // rotate
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304 | for (Node n: allNodes) {
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305 | EastNorth tmp = EN.rotate_cc(pivot, n.getEastNorth(), - headingAll);
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306 | nX.put(n, tmp.east());
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307 | nY.put(n, tmp.north());
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308 | }
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309 |
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310 | // orthogonalize
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311 | final Direction[] HORIZONTAL = {Direction.RIGHT, Direction.LEFT};
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312 | final Direction[] VERTICAL = {Direction.UP, Direction.DOWN};
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313 | final Direction[][] ORIENTATIONS = {HORIZONTAL, VERTICAL};
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314 | for (Direction[] orientation : ORIENTATIONS){
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315 | final HashSet<Node> s = new HashSet<Node>(allNodes);
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316 | int s_size = s.size();
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317 | for (int dummy = 0; dummy < s_size; ++dummy) {
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318 | if (s.isEmpty()) {
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319 | break;
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320 | }
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321 | final Node dummy_n = s.iterator().next(); // pick arbitrary element of s
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322 |
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323 | final HashSet<Node> cs = new HashSet<Node>(); // will contain each node that can be reached from dummy_n
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324 | cs.add(dummy_n); // walking only on horizontal / vertical segments
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325 |
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326 | boolean somethingHappened = true;
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327 | while (somethingHappened) {
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328 | somethingHappened = false;
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329 | for (WayData w : wayDataList) {
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330 | for (int i=0; i < w.nSeg; ++i) {
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331 | Node n1 = w.way.getNodes().get(i);
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332 | Node n2 = w.way.getNodes().get(i+1);
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333 | if (Arrays.asList(orientation).contains(w.segDirections[i])) {
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334 | if (cs.contains(n1) && ! cs.contains(n2)) {
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335 | cs.add(n2);
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336 | somethingHappened = true;
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337 | }
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338 | if (cs.contains(n2) && ! cs.contains(n1)) {
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339 | cs.add(n1);
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340 | somethingHappened = true;
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341 | }
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342 | }
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343 | }
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344 | }
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345 | }
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346 |
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347 | final HashMap<Node, Double> nC = (orientation == HORIZONTAL) ? nY : nX;
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348 |
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349 | double average = 0;
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350 | for (Node n : cs) {
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351 | average += nC.get(n).doubleValue();
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352 | }
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353 | average = average / cs.size();
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354 |
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355 | // if one of the nodes is a heading node, forget about the average and use its value
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356 | for (Node fn : headingNodes) {
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357 | if (cs.contains(fn)) {
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358 | average = nC.get(fn);
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359 | }
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360 | }
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361 |
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362 | for (Node n : cs) {
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363 | nC.put(n, average);
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364 | }
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365 |
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366 | for (Node n : cs) {
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367 | s.remove(n);
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368 | }
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369 | }
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370 | if (!s.isEmpty()) throw new RuntimeException();
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371 | }
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372 |
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373 | // rotate back and log the change
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374 | final Collection<Command> commands = new LinkedList<Command>();
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375 | // OrthogonalizeAction.rememberMovements.clear();
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376 | for (Node n: allNodes) {
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377 | EastNorth tmp = new EastNorth(nX.get(n), nY.get(n));
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378 | tmp = EN.rotate_cc(pivot, tmp, headingAll);
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379 | final double dx = tmp.east() - n.getEastNorth().east();
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380 | final double dy = tmp.north() - n.getEastNorth().north();
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381 | if (headingNodes.contains(n)) { // The heading nodes should not have changed
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382 | final double EPSILON = 1E-6;
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383 | if (Math.abs(dx) > Math.abs(EPSILON * tmp.east()) ||
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384 | Math.abs(dy) > Math.abs(EPSILON * tmp.east()))
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385 | throw new AssertionError();
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386 | }
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387 | else {
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388 | OrthogonalizeAction.rememberMovements.put(n, new EastNorth(dx, dy));
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389 | commands.add(new MoveCommand(n, dx, dy));
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390 | }
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391 | }
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392 | return commands;
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393 | }
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394 |
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395 | /**
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396 | * Class contains everything we need to know about a singe way.
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397 | */
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398 | private static class WayData {
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399 | final public Way way; // The assigned way
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400 | final public int nSeg; // Number of Segments of the Way
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401 | final public int nNode; // Number of Nodes of the Way
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402 | public Direction[] segDirections; // Direction of the segments
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403 | // segment i goes from node i to node (i+1)
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404 | public EastNorth segSum; // (Vector-)sum of all horizontal segments plus the sum of all vertical
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405 | // segments turned by 90 degrees
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406 | public double heading; // heading of segSum == approximate heading of the way
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407 | public WayData(Way pWay) {
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408 | way = pWay;
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409 | nNode = way.getNodes().size();
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410 | nSeg = nNode - 1;
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411 | }
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412 | /**
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413 | * Estimate the direction of the segments, given the first segment points in the
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414 | * direction <code>pInitialDirection</code>.
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415 | * Then sum up all horizontal / vertical segments to have a good guess for the
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416 | * heading of the entire way.
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417 | */
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418 | public void calcDirections(Direction pInitialDirection) throws InvalidUserInputException {
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419 | final EastNorth[] en = new EastNorth[nNode]; // alias: way.getNodes().get(i).getEastNorth() ---> en[i]
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420 | for (int i=0; i < nNode; i++) {
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421 | en[i] = new EastNorth(way.getNodes().get(i).getEastNorth().east(), way.getNodes().get(i).getEastNorth().north());
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422 | }
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423 | segDirections = new Direction[nSeg];
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424 | Direction direction = pInitialDirection;
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425 | segDirections[0] = direction;
|
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426 | for (int i=0; i < nSeg - 1; i++) {
|
---|
427 | double h1 = EN.polar(en[i],en[i+1]);
|
---|
428 | double h2 = EN.polar(en[i+1],en[i+2]);
|
---|
429 | try {
|
---|
430 | direction = direction.changeBy(angleToDirectionChange(h2 - h1, TOLERANCE1));
|
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431 | } catch (RejectedAngleException ex) {
|
---|
432 | throw new InvalidUserInputException(tr("Please select ways with angles of approximately 90 or 180 degrees."));
|
---|
433 | }
|
---|
434 | segDirections[i+1] = direction;
|
---|
435 | }
|
---|
436 |
|
---|
437 | // sum up segments
|
---|
438 | EastNorth h = new EastNorth(0.,0.);
|
---|
439 | //double lh = EN.abs(h);
|
---|
440 | EastNorth v = new EastNorth(0.,0.);
|
---|
441 | //double lv = EN.abs(v);
|
---|
442 | for (int i = 0; i < nSeg; ++i) {
|
---|
443 | EastNorth segment = EN.diff(en[i+1], en[i]);
|
---|
444 | if (segDirections[i] == Direction.RIGHT) {
|
---|
445 | h = EN.sum(h,segment);
|
---|
446 | } else if (segDirections[i] == Direction.UP) {
|
---|
447 | v = EN.sum(v,segment);
|
---|
448 | } else if (segDirections[i] == Direction.LEFT) {
|
---|
449 | h = EN.diff(h,segment);
|
---|
450 | } else if (segDirections[i] == Direction.DOWN) {
|
---|
451 | v = EN.diff(v,segment);
|
---|
452 | } else throw new IllegalStateException();
|
---|
453 | /**
|
---|
454 | * When summing up the length of the sum vector should increase.
|
---|
455 | * However, it is possible to construct ways, such that this assertion fails.
|
---|
456 | * So only uncomment this for testing
|
---|
457 | **/
|
---|
458 | // if (segDirections[i].ordinal() % 2 == 0) {
|
---|
459 | // if (EN.abs(h) < lh) throw new AssertionError();
|
---|
460 | // lh = EN.abs(h);
|
---|
461 | // } else {
|
---|
462 | // if (EN.abs(v) < lv) throw new AssertionError();
|
---|
463 | // lv = EN.abs(v);
|
---|
464 | // }
|
---|
465 | }
|
---|
466 | // rotate the vertical vector by 90 degrees (clockwise) and add it to the horizontal vector
|
---|
467 | segSum = EN.sum(h, new EastNorth(v.north(), - v.east()));
|
---|
468 | // if (EN.abs(segSum) < lh) throw new AssertionError();
|
---|
469 | this.heading = EN.polar(new EastNorth(0.,0.), segSum);
|
---|
470 | }
|
---|
471 | }
|
---|
472 |
|
---|
473 | private enum Direction {
|
---|
474 | RIGHT, UP, LEFT, DOWN;
|
---|
475 | public Direction changeBy(int directionChange) {
|
---|
476 | int tmp = (this.ordinal() + directionChange) % 4;
|
---|
477 | if (tmp < 0) {
|
---|
478 | tmp += 4; // the % operator can return negative value
|
---|
479 | }
|
---|
480 | return Direction.values()[tmp];
|
---|
481 | }
|
---|
482 | }
|
---|
483 |
|
---|
484 | /**
|
---|
485 | * Make sure angle (up to 2*Pi) is in interval [ 0, 2*Pi ).
|
---|
486 | */
|
---|
487 | private static double standard_angle_0_to_2PI(double a) {
|
---|
488 | while (a >= 2 * Math.PI) {
|
---|
489 | a -= 2 * Math.PI;
|
---|
490 | }
|
---|
491 | while (a < 0) {
|
---|
492 | a += 2 * Math.PI;
|
---|
493 | }
|
---|
494 | return a;
|
---|
495 | }
|
---|
496 |
|
---|
497 | /**
|
---|
498 | * Make sure angle (up to 2*Pi) is in interval ( -Pi, Pi ].
|
---|
499 | */
|
---|
500 | private static double standard_angle_mPI_to_PI(double a) {
|
---|
501 | while (a > Math.PI) {
|
---|
502 | a -= 2 * Math.PI;
|
---|
503 | }
|
---|
504 | while (a <= - Math.PI) {
|
---|
505 | a += 2 * Math.PI;
|
---|
506 | }
|
---|
507 | return a;
|
---|
508 | }
|
---|
509 |
|
---|
510 | /**
|
---|
511 | * Class contains some auxiliary functions
|
---|
512 | */
|
---|
513 | private static class EN {
|
---|
514 | // rotate counter-clock-wise
|
---|
515 | public static EastNorth rotate_cc(EastNorth pivot, EastNorth en, double angle) {
|
---|
516 | double cosPhi = Math.cos(angle);
|
---|
517 | double sinPhi = Math.sin(angle);
|
---|
518 | double x = en.east() - pivot.east();
|
---|
519 | double y = en.north() - pivot.north();
|
---|
520 | double nx = cosPhi * x - sinPhi * y + pivot.east();
|
---|
521 | double ny = sinPhi * x + cosPhi * y + pivot.north();
|
---|
522 | return new EastNorth(nx, ny);
|
---|
523 | }
|
---|
524 | public static EastNorth sum(EastNorth en1, EastNorth en2) {
|
---|
525 | return new EastNorth(en1.east() + en2.east(), en1.north() + en2.north());
|
---|
526 | }
|
---|
527 | public static EastNorth diff(EastNorth en1, EastNorth en2) {
|
---|
528 | return new EastNorth(en1.east() - en2.east(), en1.north() - en2.north());
|
---|
529 | }
|
---|
530 | public static double polar(EastNorth en1, EastNorth en2) {
|
---|
531 | return Math.atan2(en2.north() - en1.north(), en2.east() - en1.east());
|
---|
532 | }
|
---|
533 | }
|
---|
534 |
|
---|
535 | /**
|
---|
536 | * Recognize angle to be approximately 0, 90, 180 or 270 degrees.
|
---|
537 | * returns an integral value, corresponding to a counter clockwise turn:
|
---|
538 | */
|
---|
539 | private static int angleToDirectionChange(double a, double deltaMax) throws RejectedAngleException {
|
---|
540 | a = standard_angle_mPI_to_PI(a);
|
---|
541 | double d0 = Math.abs(a);
|
---|
542 | double d90 = Math.abs(a - Math.PI / 2);
|
---|
543 | double d_m90 = Math.abs(a + Math.PI / 2);
|
---|
544 | int dirChange;
|
---|
545 | if (d0 < deltaMax) {
|
---|
546 | dirChange = 0;
|
---|
547 | } else if (d90 < deltaMax) {
|
---|
548 | dirChange = 1;
|
---|
549 | } else if (d_m90 < deltaMax) {
|
---|
550 | dirChange = -1;
|
---|
551 | } else {
|
---|
552 | a = standard_angle_0_to_2PI(a);
|
---|
553 | double d180 = Math.abs(a - Math.PI);
|
---|
554 | if (d180 < deltaMax) {
|
---|
555 | dirChange = 2;
|
---|
556 | } else
|
---|
557 | throw new RejectedAngleException();
|
---|
558 | }
|
---|
559 | return dirChange;
|
---|
560 | }
|
---|
561 |
|
---|
562 | /**
|
---|
563 | * Exception: unsuited user input
|
---|
564 | */
|
---|
565 | private static class InvalidUserInputException extends Exception {
|
---|
566 | InvalidUserInputException(String message) {
|
---|
567 | super(message);
|
---|
568 | }
|
---|
569 | InvalidUserInputException() {
|
---|
570 | super();
|
---|
571 | }
|
---|
572 | }
|
---|
573 | /**
|
---|
574 | * Exception: angle cannot be recognized as 0, 90, 180 or 270 degrees
|
---|
575 | */
|
---|
576 | private static class RejectedAngleException extends Exception {
|
---|
577 | RejectedAngleException() {
|
---|
578 | super();
|
---|
579 | }
|
---|
580 | }
|
---|
581 |
|
---|
582 | /**
|
---|
583 | * Don't check, if the current selection is suited for orthogonalization.
|
---|
584 | * Instead, show a usage dialog, that explains, why it cannot be done.
|
---|
585 | */
|
---|
586 | @Override
|
---|
587 | protected void updateEnabledState() {
|
---|
588 | setEnabled(getCurrentDataSet() != null);
|
---|
589 | }
|
---|
590 | }
|
---|