diff options
Diffstat (limited to 'platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/geometry/LatLngBounds.java')
-rw-r--r-- | platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/geometry/LatLngBounds.java | 46 |
1 files changed, 38 insertions, 8 deletions
diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/geometry/LatLngBounds.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/geometry/LatLngBounds.java index 55494b72d8..626d7176e8 100644 --- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/geometry/LatLngBounds.java +++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/geometry/LatLngBounds.java @@ -28,7 +28,7 @@ public class LatLngBounds implements Parcelable { /** * Construct a new LatLngBounds based on its corners, given in NESW * order. - * + * <p> * If eastern longitude is smaller than the western one, bounds will include antimeridian. * For example, if the NE point is (10, -170) and the SW point is (-10, 170), then bounds will span over 20 degrees * and cross the antimeridian. @@ -46,6 +46,11 @@ public class LatLngBounds implements Parcelable { this.longitudeWest = westLongitude; } + LatLngBounds(LatLngBounds latLngBounds) { + this(latLngBounds.latitudeNorth, latLngBounds.longitudeEast, + latLngBounds.latitudeSouth, latLngBounds.longitudeWest); + } + /** * Returns the world bounds. * @@ -75,7 +80,6 @@ public class LatLngBounds implements Parcelable { if (longCenter >= GeometryConstants.MAX_LONGITUDE) { longCenter = this.longitudeEast - halfSpan; } - return new LatLng(latCenter, longCenter); } return new LatLng(latCenter, longCenter); @@ -188,7 +192,6 @@ public class LatLngBounds implements Parcelable { return GeometryConstants.LONGITUDE_SPAN - longSpan; } - static double getLongitudeSpan(final double longEast, final double longWest) { double longSpan = Math.abs(longEast - longWest); if (longEast >= longWest) { @@ -200,6 +203,25 @@ public class LatLngBounds implements Parcelable { } /** + * If bounds cross the antimeridian, unwrap west longitude for the shortest path. + * + * @return unwrapped bounds + */ + public LatLngBounds unwrapBounds() { + double unwrapedLonWest = longitudeWest; + if (longitudeEast < longitudeWest) { + if (longitudeWest > 0 && longitudeEast < 0) { + unwrapedLonWest -= GeometryConstants.LONGITUDE_SPAN; + } else if (longitudeWest < 0 && longitudeEast > 0) { + unwrapedLonWest += GeometryConstants.LONGITUDE_SPAN; + } + return unwrapped(latitudeNorth, longitudeEast, latitudeSouth, unwrapedLonWest); + } else { + return new LatLngBounds(this); + } + } + + /** * Validate if LatLngBounds is empty, determined if absolute distance is * * @return boolean indicating if span is empty @@ -278,12 +300,12 @@ public class LatLngBounds implements Parcelable { /** * Constructs a LatLngBounds from doubles representing a LatLng pair. - * + * <p> * This values of latNorth and latSouth should be in the range of [-90, 90], * see {@link GeometryConstants#MIN_LATITUDE} and {@link GeometryConstants#MAX_LATITUDE}, * otherwise IllegalArgumentException will be thrown. * latNorth should be greater or equal latSouth, otherwise IllegalArgumentException will be thrown. - * + * <p> * <p> * This method doesn't recalculate most east or most west boundaries. * Note that lonEast and lonWest will be wrapped to be in the range of [-180, 180], @@ -317,12 +339,20 @@ public class LatLngBounds implements Parcelable { throw new IllegalArgumentException("LatSouth cannot be less than latNorth"); } + return wrapped(latNorth, lonEast, latSouth, lonWest); + } + + static LatLngBounds wrapped(double latNorth, double lonEast, double latSouth, double lonWest) { lonEast = LatLng.wrap(lonEast, GeometryConstants.MIN_LONGITUDE, GeometryConstants.MAX_LONGITUDE); lonWest = LatLng.wrap(lonWest, GeometryConstants.MIN_LONGITUDE, GeometryConstants.MAX_LONGITUDE); return new LatLngBounds(latNorth, lonEast, latSouth, lonWest); } + static LatLngBounds unwrapped(double latNorth, double lonEast, double latSouth, double lonWest) { + return new LatLngBounds(latNorth, lonEast, latSouth, lonWest); + } + private static double lat_(int z, int y) { double n = Math.PI - 2.0 * Math.PI * y / Math.pow(2.0, z); return Math.toDegrees(Math.atan(0.5 * (Math.exp(n) - Math.exp(-n)))); @@ -334,14 +364,14 @@ public class LatLngBounds implements Parcelable { /** * Constructs a LatLngBounds from a Tile identifier. - * + * <p> * Returned bounds will have latitude in the range of Mercator projection. - * @see GeometryConstants#MIN_MERCATOR_LATITUDE - * @see GeometryConstants#MAX_MERCATOR_LATITUDE * * @param z Tile zoom level. * @param x Tile X coordinate. * @param y Tile Y coordinate. + * @see GeometryConstants#MIN_MERCATOR_LATITUDE + * @see GeometryConstants#MAX_MERCATOR_LATITUDE */ public static LatLngBounds from(int z, int x, int y) { return new LatLngBounds(lat_(z, y), lon_(z, x + 1), lat_(z, y + 1), lon_(z, x)); |