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.util.ArrayList;
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5 | import java.util.List;
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6 |
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7 | import org.openstreetmap.josm.data.Bounds;
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8 | import org.openstreetmap.josm.data.coor.LatLon;
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9 |
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10 | public class BBox {
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11 |
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12 | private double xmin = Double.POSITIVE_INFINITY;
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13 | private double xmax = Double.NEGATIVE_INFINITY;
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14 | private double ymin = Double.POSITIVE_INFINITY;
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15 | private double ymax = Double.NEGATIVE_INFINITY;
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16 |
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17 | public BBox(Bounds bounds) {
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18 | add(bounds.getMin());
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19 | add(bounds.getMax());
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20 | }
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21 |
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22 | public BBox(LatLon a, LatLon b) {
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23 | add(a);
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24 | add(b);
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25 | }
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26 |
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27 | public BBox(BBox copy) {
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28 | this.xmin = copy.xmin;
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29 | this.xmax = copy.xmax;
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30 | this.ymin = copy.ymin;
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31 | this.ymax = copy.ymax;
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32 | }
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33 |
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34 | public BBox(double a_x, double a_y, double b_x, double b_y) {
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35 | xmin = Math.min(a_x, b_x);
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36 | xmax = Math.max(a_x, b_x);
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37 | ymin = Math.min(a_y, b_y);
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38 | ymax = Math.max(a_y, b_y);
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39 | sanity();
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40 | }
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41 |
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42 | public BBox(Way w) {
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43 | for (Node n : w.getNodes()) {
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44 | LatLon coor = n.getCoor();
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45 | if (coor == null) {
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46 | continue;
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47 | }
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48 | add(coor);
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49 | }
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50 | }
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51 |
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52 | public BBox(Node n) {
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53 | LatLon coor = n.getCoor();
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54 | if (coor == null) {
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55 | xmin = xmax = ymin = ymax = 0;
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56 | } else {
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57 | xmin = xmax = coor.lon();
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58 | ymin = ymax = coor.lat();
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59 | }
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60 | }
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61 |
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62 | private void sanity() {
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63 | if (xmin < -180.0) {
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64 | xmin = -180.0;
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65 | }
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66 | if (xmax > 180.0) {
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67 | xmax = 180.0;
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68 | }
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69 | if (ymin < -90.0) {
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70 | ymin = -90.0;
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71 | }
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72 | if (ymax > 90.0) {
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73 | ymax = 90.0;
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74 | }
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75 | }
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76 |
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77 | public void add(LatLon c) {
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78 | add(c.lon(), c.lat());
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79 | }
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80 |
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81 | /**
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82 | * Extends this bbox to include the point (x, y)
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83 | */
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84 | public void add(double x, double y) {
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85 | xmin = Math.min(xmin, x);
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86 | xmax = Math.max(xmax, x);
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87 | ymin = Math.min(ymin, y);
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88 | ymax = Math.max(ymax, y);
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89 | sanity();
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90 | }
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91 |
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92 | public void add(BBox box) {
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93 | add(box.getTopLeft());
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94 | add(box.getBottomRight());
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95 | }
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96 |
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97 | public void addPrimitive(OsmPrimitive primitive, double extraSpace) {
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98 | BBox primBbox = primitive.getBBox();
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99 | add(primBbox.xmin - extraSpace, primBbox.ymin - extraSpace);
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100 | add(primBbox.xmax + extraSpace, primBbox.ymax + extraSpace);
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101 | }
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102 |
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103 | public double height() {
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104 | return ymax-ymin;
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105 | }
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106 |
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107 | public double width() {
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108 | return xmax-xmin;
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109 | }
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110 |
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111 | /**
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112 | * Tests, weather the bbox b lies completely inside
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113 | * this bbox.
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114 | */
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115 | public boolean bounds(BBox b) {
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116 | if (!(xmin <= b.xmin) ||
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117 | !(xmax >= b.xmax) ||
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118 | !(ymin <= b.ymin) ||
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119 | !(ymax >= b.ymax))
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120 | return false;
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121 | return true;
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122 | }
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123 |
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124 | /**
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125 | * Tests, weather the Point c lies within the bbox.
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126 | */
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127 | public boolean bounds(LatLon c) {
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128 | if ((xmin <= c.lon()) &&
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129 | (xmax >= c.lon()) &&
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130 | (ymin <= c.lat()) &&
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131 | (ymax >= c.lat()))
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132 | return true;
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133 | return false;
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134 | }
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135 |
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136 | /**
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137 | * Tests, weather two BBoxes intersect as an area.
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138 | * I.e. weather there exists a point that lies in both of them.
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139 | */
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140 | public boolean intersects(BBox b) {
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141 | if (xmin > b.xmax)
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142 | return false;
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143 | if (xmax < b.xmin)
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144 | return false;
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145 | if (ymin > b.ymax)
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146 | return false;
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147 | if (ymax < b.ymin)
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148 | return false;
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149 | return true;
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150 | }
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151 |
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152 | /**
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153 | * Returns a list of all 4 corners of the bbox rectangle.
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154 | */
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155 | public List<LatLon> points() {
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156 | LatLon p1 = new LatLon(ymin, xmin);
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157 | LatLon p2 = new LatLon(ymin, xmax);
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158 | LatLon p3 = new LatLon(ymax, xmin);
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159 | LatLon p4 = new LatLon(ymax, xmax);
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160 | List<LatLon> ret = new ArrayList<LatLon>(4);
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161 | ret.add(p1);
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162 | ret.add(p2);
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163 | ret.add(p3);
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164 | ret.add(p4);
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165 | return ret;
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166 | }
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167 |
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168 | public LatLon getTopLeft() {
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169 | return new LatLon(ymax, xmin);
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170 | }
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171 |
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172 | public LatLon getBottomRight() {
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173 | return new LatLon(ymin, xmax);
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174 | }
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175 |
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176 | @Override
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177 | public int hashCode() {
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178 | return (int)(ymin * xmin);
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179 | }
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180 |
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181 | @Override
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182 | public boolean equals(Object o) {
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183 | if (o instanceof BBox) {
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184 | BBox b = (BBox)o;
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185 | return b.xmax == xmax && b.ymax == ymax && b.xmin == xmin && b.ymin == ymin;
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186 | } else
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187 | return false;
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188 | }
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189 |
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190 | @Override
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191 | public String toString() {
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192 | return "[ x: " + xmin + " -> " + xmax +
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193 | ", y: " + ymin + " -> " + ymax + " ]";
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194 | }
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195 | }
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