1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.data.osm;
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3 |
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4 | import java.awt.geom.Rectangle2D;
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5 | import java.util.Arrays;
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6 | import java.util.Objects;
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7 |
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8 | import org.openstreetmap.josm.data.Bounds;
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9 | import org.openstreetmap.josm.data.coor.ILatLon;
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10 | import org.openstreetmap.josm.data.coor.LatLon;
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11 | import org.openstreetmap.josm.data.coor.QuadTiling;
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12 | import org.openstreetmap.josm.tools.Utils;
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13 |
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14 | /**
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15 | * A BBox represents an area in lat/lon space. It is used for the quad tree.
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16 | *
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17 | * In contrast to a {@link Bounds} object, a BBox can represent an invalid (empty) area.
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18 | */
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19 | public class BBox {
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20 |
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21 | protected double xmin = Double.POSITIVE_INFINITY;
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22 | protected double xmax = Double.NEGATIVE_INFINITY;
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23 | protected double ymin = Double.POSITIVE_INFINITY;
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24 | protected double ymax = Double.NEGATIVE_INFINITY;
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25 |
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26 | /**
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27 | * Constructs a new (invalid) BBox
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28 | */
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29 | public BBox() {
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30 | // Nothing to do
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31 | }
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32 |
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33 | /**
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34 | * Constructs a new {@code BBox} defined by a single point.
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35 | *
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36 | * @param x X coordinate
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37 | * @param y Y coordinate
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38 | * @since 6203
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39 | */
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40 | public BBox(final double x, final double y) {
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41 | add(x, y);
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42 | }
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43 |
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44 | /**
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45 | * Constructs a new {@code BBox} defined by points <code>a</code> and <code>b</code>.
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46 | * Result is minimal BBox containing both points if they are both valid, else undefined
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47 | *
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48 | * @param a first point
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49 | * @param b second point
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50 | */
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51 | public BBox(LatLon a, LatLon b) {
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52 | this(a.lon(), a.lat(), b.lon(), b.lat());
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53 | }
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54 |
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55 | /**
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56 | * Constructs a new {@code BBox} from another one.
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57 | *
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58 | * @param copy the BBox to copy
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59 | */
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60 | public BBox(BBox copy) {
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61 | this.xmin = copy.xmin;
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62 | this.xmax = copy.xmax;
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63 | this.ymin = copy.ymin;
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64 | this.ymax = copy.ymax;
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65 | }
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66 |
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67 | /**
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68 | * Creates bbox around the coordinate (x, y).
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69 | * Coordinate defines center of bbox, its edge will be 2*r.
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70 | *
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71 | * @param x X coordinate
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72 | * @param y Y coordinate
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73 | * @param r size
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74 | * @since 13140
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75 | */
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76 | public BBox(double x, double y, double r) {
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77 | this(x - r, y - r, x + r, y + r);
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78 | }
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79 |
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80 | /**
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81 | * Create minimal BBox so that {@code this.bounds(ax,ay)} and {@code this.bounds(bx,by)} will both return true
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82 | * @param ax left or right X value (-180 .. 180)
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83 | * @param ay top or bottom Y value (-90 .. 90)
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84 | * @param bx left or right X value (-180 .. 180)
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85 | * @param by top or bottom Y value (-90 .. 90)
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86 | */
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87 | public BBox(double ax, double ay, double bx, double by) {
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88 | if (!(Double.isNaN(ax) || Double.isNaN(ay) || Double.isNaN(bx) || Double.isNaN(by))) {
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89 | add(ax, ay);
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90 | add(bx, by);
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91 | }
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92 | // otherwise use default which is an invalid BBox
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93 | }
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94 |
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95 | /**
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96 | * Create BBox for all nodes of the way with known coordinates.
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97 | * If no node has a known coordinate, an invalid BBox is returned.
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98 | * @param w the way
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99 | */
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100 | public BBox(Way w) {
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101 | w.getNodes().forEach(this::add);
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102 | }
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103 |
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104 | /**
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105 | * Create BBox for a node. An invalid BBox is returned if the coordinates are not known.
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106 | * @param n the node
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107 | */
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108 | public BBox(Node n) {
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109 | this((ILatLon) n);
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110 | }
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111 |
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112 | /**
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113 | * Create BBox for a given latlon. An invalid BBox is returned if the coordinates are not known.
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114 | * @param ll The lat lon position
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115 | */
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116 | public BBox(ILatLon ll) {
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117 | add(ll);
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118 | }
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119 |
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120 | /**
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121 | * Add a point to an existing BBox. Extends this bbox if necessary so that this.bounds(c) will return true
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122 | * if c is a valid LatLon instance.
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123 | * Kept for binary compatibility
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124 | * @param c a LatLon point
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125 | */
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126 | public final void add(LatLon c) {
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127 | add((ILatLon) c);
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128 | }
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129 |
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130 | /**
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131 | * Add a point to an existing BBox. Extends this bbox if necessary so that this.bounds(c) will return true
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132 | * if c is a valid LatLon instance.
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133 | * If it is invalid or <code>null</code>, this call is ignored.
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134 | * @param c a LatLon point.
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135 | */
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136 | public final void add(ILatLon c) {
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137 | if (c != null) {
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138 | add(c.lon(), c.lat());
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139 | }
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140 | }
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141 |
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142 | /**
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143 | * Extends this bbox to include the point (x, y)
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144 | * @param x X coordinate
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145 | * @param y Y coordinate
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146 | */
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147 | public final void add(double x, double y) {
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148 | if (!Double.isNaN(x) && !Double.isNaN(y)) {
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149 | xmin = Math.min(xmin, x);
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150 | xmax = Math.max(xmax, x);
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151 | ymin = Math.min(ymin, y);
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152 | ymax = Math.max(ymax, y);
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153 | }
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154 | }
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155 |
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156 | /**
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157 | * Extends this bbox to include the bbox other. Does nothing if other is not valid.
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158 | * @param other a bbox
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159 | */
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160 | public final void add(BBox other) {
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161 | if (other.isValid()) {
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162 | xmin = Math.min(xmin, other.xmin);
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163 | xmax = Math.max(xmax, other.xmax);
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164 | ymin = Math.min(ymin, other.ymin);
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165 | ymax = Math.max(ymax, other.ymax);
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166 | }
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167 | }
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168 |
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169 | /**
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170 | * Extends this bbox to include the bbox of the primitive extended by extraSpace.
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171 | * @param primitive an OSM primitive
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172 | * @param extraSpace the value to extend the primitives bbox. Unit is in LatLon degrees.
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173 | */
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174 | public void addPrimitive(OsmPrimitive primitive, double extraSpace) {
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175 | BBox primBbox = primitive.getBBox();
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176 | add(primBbox.xmin - extraSpace, primBbox.ymin - extraSpace);
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177 | add(primBbox.xmax + extraSpace, primBbox.ymax + extraSpace);
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178 | }
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179 |
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180 | /**
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181 | * Gets the height of the bbox.
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182 | * @return The difference between ymax and ymin. 0 for invalid bboxes.
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183 | */
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184 | public double height() {
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185 | if (isValid()) {
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186 | return ymax - ymin;
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187 | } else {
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188 | return 0;
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189 | }
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190 | }
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191 |
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192 | /**
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193 | * Gets the width of the bbox.
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194 | * @return The difference between xmax and xmin. 0 for invalid bboxes.
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195 | */
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196 | public double width() {
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197 | if (isValid()) {
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198 | return xmax - xmin;
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199 | } else {
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200 | return 0;
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201 | }
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202 | }
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203 |
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204 | /**
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205 | * Tests, whether the bbox {@code b} lies completely inside this bbox.
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206 | * @param b bounding box
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207 | * @return {@code true} if {@code b} lies completely inside this bbox
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208 | */
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209 | public boolean bounds(BBox b) {
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210 | return xmin <= b.xmin && xmax >= b.xmax
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211 | && ymin <= b.ymin && ymax >= b.ymax;
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212 | }
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213 |
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214 | /**
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215 | * Tests, whether the Point {@code c} lies within the bbox.
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216 | * @param c point
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217 | * @return {@code true} if {@code c} lies within the bbox
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218 | */
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219 | public boolean bounds(LatLon c) {
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220 | return xmin <= c.lon() && xmax >= c.lon()
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221 | && ymin <= c.lat() && ymax >= c.lat();
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222 | }
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223 |
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224 | /**
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225 | * Tests, whether two BBoxes intersect as an area.
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226 | * I.e. whether there exists a point that lies in both of them.
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227 | * @param b other bounding box
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228 | * @return {@code true} if this bbox intersects with the other
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229 | */
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230 | public boolean intersects(BBox b) {
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231 | return xmin <= b.xmax && xmax >= b.xmin
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232 | && ymin <= b.ymax && ymax >= b.ymin;
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233 | }
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234 |
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235 | /**
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236 | * Returns the top-left point.
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237 | * @return The top-left point
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238 | */
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239 | public LatLon getTopLeft() {
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240 | return new LatLon(ymax, xmin);
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241 | }
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242 |
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243 | /**
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244 | * Returns the latitude of top-left point.
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245 | * @return The latitude of top-left point
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246 | * @since 6203
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247 | */
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248 | public double getTopLeftLat() {
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249 | return ymax;
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250 | }
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251 |
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252 | /**
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253 | * Returns the longitude of top-left point.
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254 | * @return The longitude of top-left point
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255 | * @since 6203
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256 | */
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257 | public double getTopLeftLon() {
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258 | return xmin;
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259 | }
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260 |
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261 | /**
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262 | * Returns the bottom-right point.
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263 | * @return The bottom-right point
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264 | */
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265 | public LatLon getBottomRight() {
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266 | return new LatLon(ymin, xmax);
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267 | }
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268 |
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269 | /**
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270 | * Returns the latitude of bottom-right point.
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271 | * @return The latitude of bottom-right point
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272 | * @since 6203
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273 | */
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274 | public double getBottomRightLat() {
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275 | return ymin;
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276 | }
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277 |
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278 | /**
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279 | * Returns the longitude of bottom-right point.
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280 | * @return The longitude of bottom-right point
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281 | * @since 6203
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282 | */
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283 | public double getBottomRightLon() {
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284 | return xmax;
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285 | }
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286 |
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287 | /**
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288 | * Gets the center of this BBox.
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289 | * @return The center.
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290 | */
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291 | public LatLon getCenter() {
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292 | return new LatLon(ymin + (ymax-ymin)/2.0, xmin + (xmax-xmin)/2.0);
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293 | }
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294 |
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295 | byte getIndex(final int level) {
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296 |
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297 | byte idx1 = QuadTiling.index(ymin, xmin, level);
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298 |
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299 | final byte idx2 = QuadTiling.index(ymin, xmax, level);
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300 | if (idx1 == -1) idx1 = idx2;
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301 | else if (idx1 != idx2) return -1;
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302 |
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303 | final byte idx3 = QuadTiling.index(ymax, xmin, level);
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304 | if (idx1 == -1) idx1 = idx3;
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305 | else if (idx1 != idx3) return -1;
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306 |
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307 | final byte idx4 = QuadTiling.index(ymax, xmax, level);
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308 | if (idx1 == -1) idx1 = idx4;
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309 | else if (idx1 != idx4) return -1;
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310 |
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311 | return idx1;
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312 | }
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313 |
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314 | /**
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315 | * Converts the bounds to a rectangle
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316 | * @return The rectangle in east/north space.
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317 | */
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318 | public Rectangle2D toRectangle() {
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319 | return new Rectangle2D.Double(xmin, ymin, xmax - xmin, ymax - ymin);
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320 | }
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321 |
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322 | @Override
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323 | public int hashCode() {
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324 | return Objects.hash(xmin, xmax, ymin, ymax);
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325 | }
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326 |
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327 | @Override
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328 | public boolean equals(Object o) {
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329 | if (this == o) return true;
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330 | if (o == null || getClass() != o.getClass()) return false;
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331 | BBox b = (BBox) o;
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332 | return Double.compare(b.xmax, xmax) == 0 && Double.compare(b.ymax, ymax) == 0
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333 | && Double.compare(b.xmin, xmin) == 0 && Double.compare(b.ymin, ymin) == 0;
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334 | }
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335 |
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336 | /**
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337 | * @return true if the bbox covers a part of the planets surface
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338 | * Height and width must be non-negative, but may (both) be 0.
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339 | * @since 11269
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340 | */
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341 | public boolean isValid() {
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342 | return xmin <= xmax && ymin <= ymax;
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343 | }
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344 |
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345 | /**
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346 | * @return true if the bbox is avalid and covers a part of the planets surface
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347 | * @since 11269
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348 | */
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349 | public boolean isInWorld() {
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350 | return xmin >= -180.0 && xmax <= 180.0 && ymin >= -90.0 && ymax <= 90.0 && isValid();
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351 | }
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352 |
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353 | @Override
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354 | public String toString() {
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355 | return "[ x: " + xmin + " -> " + xmax + ", y: " + ymin + " -> " + ymax + " ]";
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356 | }
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357 |
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358 | /**
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359 | * Creates a CSV string for this bbox
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360 | * @param separator The separator to use
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361 | * @return A string
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362 | */
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363 | public String toStringCSV(String separator) {
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364 | return Utils.join(separator, Arrays.asList(
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365 | LatLon.cDdFormatter.format(xmin),
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366 | LatLon.cDdFormatter.format(ymin),
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367 | LatLon.cDdFormatter.format(xmax),
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368 | LatLon.cDdFormatter.format(ymax)));
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369 | }
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370 | }
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