[6380] | 1 | // License: GPL. For details, see LICENSE file.
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[1722] | 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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[8384] | 5 | import org.openstreetmap.josm.tools.Utils;
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[1722] | 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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[4065] | 9 | * east/north min/max values.
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[1722] | 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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[9243] | 15 | * The minimum east coordinate.
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[1722] | 16 | */
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[9243] | 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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[1722] | 30 |
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| 31 | /**
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[5670] | 32 | * Construct bounds out of two points.
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[9243] | 33 | * @param min min east/north
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| 34 | * @param max max east/north
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[1722] | 35 | */
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| 36 | public ProjectionBounds(EastNorth min, EastNorth max) {
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[4065] | 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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[1722] | 41 | }
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[8384] | 42 |
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[9243] | 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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[1724] | 47 | public ProjectionBounds(EastNorth p) {
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[4065] | 48 | this.minEast = this.maxEast = p.east();
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| 49 | this.minNorth = this.maxNorth = p.north();
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[1724] | 50 | }
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[8384] | 51 |
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[9243] | 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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[1722] | 58 | public ProjectionBounds(EastNorth center, double east, double north) {
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[4065] | 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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[1722] | 63 | }
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[8384] | 64 |
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[9243] | 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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[4065] | 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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[8384] | 78 |
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[9243] | 79 | /**
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| 80 | * Extends bounds to include point {@code e}.
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| 81 | * @param e east/north to include
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| 82 | */
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[8384] | 83 | public void extend(EastNorth e) {
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[4065] | 84 | if (e.east() < minEast) {
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| 85 | minEast = e.east();
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| 86 | }
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| 87 | if (e.east() > maxEast) {
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| 88 | maxEast = e.east();
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| 89 | }
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| 90 | if (e.north() < minNorth) {
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| 91 | minNorth = e.north();
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| 92 | }
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| 93 | if (e.north() > maxNorth) {
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| 94 | maxNorth = e.north();
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| 95 | }
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[1722] | 96 | }
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[8384] | 97 |
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[9243] | 98 | /**
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[11774] | 99 | * Extends bounds to include bounds {@code b}.
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| 100 | * @param b bounds to include
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| 101 | * @since 11774
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| 102 | */
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| 103 | public void extend(ProjectionBounds b) {
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| 104 | if (b.minEast < minEast) {
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| 105 | minEast = b.minEast;
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| 106 | }
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| 107 | if (b.maxEast > maxEast) {
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| 108 | maxEast = b.maxEast;
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| 109 | }
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| 110 | if (b.minNorth < minNorth) {
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| 111 | minNorth = b.minNorth;
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| 112 | }
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| 113 | if (b.maxNorth > maxNorth) {
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| 114 | maxNorth = b.maxNorth;
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| 115 | }
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| 116 | }
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| 117 |
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| 118 | /**
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[9243] | 119 | * Returns the center east/north.
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| 120 | * @return the center east/north
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| 121 | */
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[8384] | 122 | public EastNorth getCenter() {
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[4065] | 123 | return new EastNorth((minEast + maxEast) / 2.0, (minNorth + maxNorth) / 2.0);
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[1722] | 124 | }
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[1724] | 125 |
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[8384] | 126 | @Override
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| 127 | public String toString() {
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[10300] | 128 | return "ProjectionBounds["+minEast+','+minNorth+','+maxEast+','+maxNorth+']';
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[1724] | 129 | }
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[4065] | 130 |
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| 131 | /**
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| 132 | * The two bounds intersect? Compared to java Shape.intersects, if does not use
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[6830] | 133 | * the interior but the closure. (">=" instead of ">")
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[9243] | 134 | * @param b projection bounds
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| 135 | * @return {@code true} if the two bounds intersect
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[4065] | 136 | */
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| 137 | public boolean intersects(ProjectionBounds b) {
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| 138 | return b.maxEast >= minEast &&
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| 139 | b.maxNorth >= minNorth &&
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| 140 | b.minEast <= maxEast &&
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| 141 | b.minNorth <= maxNorth;
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| 142 | }
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| 143 |
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[9243] | 144 | /**
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[9419] | 145 | * Check, if a point is within the bounds.
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| 146 | * @param en the point
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| 147 | * @return true, if <code>en</code> is within the bounds
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| 148 | */
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| 149 | public boolean contains(EastNorth en) {
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| 150 | return minEast <= en.east() && en.east() <= maxEast &&
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| 151 | minNorth <= en.north() && en.north() <= maxNorth;
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| 152 | }
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| 153 |
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| 154 | /**
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[9243] | 155 | * Returns the min east/north.
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| 156 | * @return the min east/north
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| 157 | */
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[4065] | 158 | public EastNorth getMin() {
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| 159 | return new EastNorth(minEast, minNorth);
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| 160 | }
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| 161 |
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[9243] | 162 | /**
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| 163 | * Returns the max east/north.
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| 164 | * @return the max east/north
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| 165 | */
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[4065] | 166 | public EastNorth getMax() {
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| 167 | return new EastNorth(maxEast, maxNorth);
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| 168 | }
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| 169 |
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[8927] | 170 | /**
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| 171 | * Determines if the bounds area is not null
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| 172 | * @return {@code true} if the area is not null
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| 173 | */
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[7816] | 174 | public boolean hasExtend() {
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[8384] | 175 | return !Utils.equalsEpsilon(minEast, maxEast) || !Utils.equalsEpsilon(minNorth, maxNorth);
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[7816] | 176 | }
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[1722] | 177 | }
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