1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.data;
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3 |
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4 | import org.openstreetmap.josm.data.coor.EastNorth;
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5 | import org.openstreetmap.josm.tools.Utils;
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6 |
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7 | /**
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8 | * This is a simple data class for "rectangular" areas of the world, given in
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9 | * east/north min/max values.
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10 | *
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11 | * @author imi
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12 | */
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13 | public class ProjectionBounds {
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14 | /**
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15 | * The minimum east coordinate.
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16 | */
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17 | public double minEast;
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18 | /**
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19 | * The minimum north coordinate.
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20 | */
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21 | public double minNorth;
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22 | /**
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23 | * The maximum east coordinate.
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24 | */
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25 | public double maxEast;
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26 | /**
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27 | * The minimum north coordinate.
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28 | */
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29 | public double maxNorth;
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30 |
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31 | /**
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32 | * Construct bounds out of two points.
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33 | * @param min min east/north
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34 | * @param max max east/north
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35 | */
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36 | public ProjectionBounds(EastNorth min, EastNorth max) {
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37 | this.minEast = min.east();
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38 | this.minNorth = min.north();
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39 | this.maxEast = max.east();
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40 | this.maxNorth = max.north();
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41 | }
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42 |
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43 | /**
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44 | * Construct bounds out of a single point.
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45 | * @param p east/north
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46 | */
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47 | public ProjectionBounds(EastNorth p) {
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48 | this.minEast = this.maxEast = p.east();
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49 | this.minNorth = this.maxNorth = p.north();
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50 | }
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51 |
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52 | /**
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53 | * Construct bounds out of a center point and east/north dimensions.
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54 | * @param center center east/north
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55 | * @param east east dimension
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56 | * @param north north dimension
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57 | */
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58 | public ProjectionBounds(EastNorth center, double east, double north) {
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59 | this.minEast = center.east()-east/2.0;
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60 | this.minNorth = center.north()-north/2.0;
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61 | this.maxEast = center.east()+east/2.0;
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62 | this.maxNorth = center.north()+north/2.0;
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63 | }
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64 |
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65 | /**
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66 | * Construct bounds out of two points.
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67 | * @param minEast min east
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68 | * @param minNorth min north
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69 | * @param maxEast max east
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70 | * @param maxNorth max north
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71 | */
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72 | public ProjectionBounds(double minEast, double minNorth, double maxEast, double maxNorth) {
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73 | this.minEast = minEast;
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74 | this.minNorth = minNorth;
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75 | this.maxEast = maxEast;
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76 | this.maxNorth = maxNorth;
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77 | }
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78 |
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79 | /**
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80 | * Construct uninitialized bounds.
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81 | * <p>
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82 | * At least one call to {@link #extend(EastNorth)} or {@link #extend(ProjectionBounds)}
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83 | * is required immediately after construction to initialize the {@code ProjectionBounds}
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84 | * instance and make it valid.
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85 | * <p>
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86 | * Uninitialized {@code ProjectionBounds} must not be passed to other methods
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87 | * or used in any way other than initializing it.
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88 | */
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89 | public ProjectionBounds() {
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90 | this.minEast = Double.POSITIVE_INFINITY;
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91 | this.minNorth = Double.POSITIVE_INFINITY;
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92 | this.maxEast = Double.NEGATIVE_INFINITY;
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93 | this.maxNorth = Double.NEGATIVE_INFINITY;
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94 | }
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95 |
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96 | /**
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97 | * Extends bounds to include point {@code e}.
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98 | * @param e east/north to include
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99 | */
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100 | public void extend(EastNorth e) {
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101 | if (e.east() < minEast) {
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102 | minEast = e.east();
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103 | }
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104 | if (e.east() > maxEast) {
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105 | maxEast = e.east();
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106 | }
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107 | if (e.north() < minNorth) {
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108 | minNorth = e.north();
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109 | }
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110 | if (e.north() > maxNorth) {
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111 | maxNorth = e.north();
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112 | }
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113 | }
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114 |
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115 | /**
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116 | * Extends bounds to include bounds {@code b}.
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117 | * @param b bounds to include
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118 | * @since 11774
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119 | */
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120 | public void extend(ProjectionBounds b) {
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121 | if (b.minEast < minEast) {
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122 | minEast = b.minEast;
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123 | }
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124 | if (b.maxEast > maxEast) {
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125 | maxEast = b.maxEast;
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126 | }
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127 | if (b.minNorth < minNorth) {
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128 | minNorth = b.minNorth;
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129 | }
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130 | if (b.maxNorth > maxNorth) {
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131 | maxNorth = b.maxNorth;
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132 | }
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133 | }
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134 |
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135 | /**
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136 | * Returns the center east/north.
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137 | * @return the center east/north
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138 | */
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139 | public EastNorth getCenter() {
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140 | return new EastNorth((minEast + maxEast) / 2.0, (minNorth + maxNorth) / 2.0);
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141 | }
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142 |
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143 | @Override
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144 | public String toString() {
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145 | return "ProjectionBounds["+minEast+','+minNorth+','+maxEast+','+maxNorth+']';
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146 | }
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147 |
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148 | /**
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149 | * The two bounds intersect? Compared to java Shape.intersects, if does not use
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150 | * the interior but the closure. (">=" instead of ">")
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151 | * @param b projection bounds
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152 | * @return {@code true} if the two bounds intersect
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153 | */
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154 | public boolean intersects(ProjectionBounds b) {
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155 | return b.maxEast >= minEast &&
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156 | b.maxNorth >= minNorth &&
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157 | b.minEast <= maxEast &&
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158 | b.minNorth <= maxNorth;
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159 | }
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160 |
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161 | /**
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162 | * Check, if a point is within the bounds.
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163 | * @param en the point
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164 | * @return true, if <code>en</code> is within the bounds
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165 | */
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166 | public boolean contains(EastNorth en) {
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167 | return minEast <= en.east() && en.east() <= maxEast &&
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168 | minNorth <= en.north() && en.north() <= maxNorth;
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169 | }
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170 |
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171 | /**
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172 | * Returns the min east/north.
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173 | * @return the min east/north
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174 | */
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175 | public EastNorth getMin() {
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176 | return new EastNorth(minEast, minNorth);
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177 | }
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178 |
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179 | /**
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180 | * Returns the max east/north.
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181 | * @return the max east/north
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182 | */
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183 | public EastNorth getMax() {
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184 | return new EastNorth(maxEast, maxNorth);
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185 | }
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186 |
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187 | /**
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188 | * Determines if the bounds area is not null
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189 | * @return {@code true} if the area is not null
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190 | */
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191 | public boolean hasExtend() {
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192 | return !Utils.equalsEpsilon(minEast, maxEast) || !Utils.equalsEpsilon(minNorth, maxNorth);
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193 | }
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194 | }
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