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#import "MGLGeometry.h"
#import <TargetConditionals.h>
#if TARGET_OS_IPHONE
#import <UIKit/UIKit.h>
#endif
#import <mbgl/util/geo.hpp>
#import <mbgl/util/geometry.hpp>
typedef double MGLLocationRadians;
typedef double MGLRadianDistance;
typedef double MGLRadianDirection;
/** Defines the coordinate by a `MGLRadianCoordinate2D`. */
typedef struct MGLRadianCoordinate2D {
MGLLocationRadians latitude;
MGLLocationRadians longitude;
} MGLRadianCoordinate2D;
/**
Creates a new `MGLRadianCoordinate2D` from the given latitudinal and longitudinal.
*/
NS_INLINE MGLRadianCoordinate2D MGLRadianCoordinate2DMake(MGLLocationRadians latitude, MGLLocationRadians longitude) {
MGLRadianCoordinate2D radianCoordinate;
radianCoordinate.latitude = latitude;
radianCoordinate.longitude = longitude;
return radianCoordinate;
}
/// Returns the smallest rectangle that contains both the given rectangle and
/// the given point.
CGRect MGLExtendRect(CGRect rect, CGPoint point);
mbgl::LatLng MGLLatLngFromLocationCoordinate2D(CLLocationCoordinate2D coordinate);
NS_INLINE mbgl::Point<double> MGLPointFromLocationCoordinate2D(CLLocationCoordinate2D coordinate) {
return mbgl::Point<double>(coordinate.longitude, coordinate.latitude);
}
NS_INLINE CLLocationCoordinate2D MGLLocationCoordinate2DFromPoint(mbgl::Point<double> point) {
return CLLocationCoordinate2DMake(point.y, point.x);
}
NS_INLINE CLLocationCoordinate2D MGLLocationCoordinate2DFromLatLng(mbgl::LatLng latLng) {
return CLLocationCoordinate2DMake(latLng.latitude(), latLng.longitude());
}
NS_INLINE MGLCoordinateBounds MGLCoordinateBoundsFromLatLngBounds(mbgl::LatLngBounds latLngBounds) {
return MGLCoordinateBoundsMake(MGLLocationCoordinate2DFromLatLng(latLngBounds.southwest()),
MGLLocationCoordinate2DFromLatLng(latLngBounds.northeast()));
}
NS_INLINE mbgl::LatLngBounds MGLLatLngBoundsFromCoordinateBounds(MGLCoordinateBounds coordinateBounds) {
return mbgl::LatLngBounds::hull(MGLLatLngFromLocationCoordinate2D(coordinateBounds.sw),
MGLLatLngFromLocationCoordinate2D(coordinateBounds.ne));
}
#if TARGET_OS_IPHONE
NS_INLINE mbgl::EdgeInsets MGLEdgeInsetsFromNSEdgeInsets(UIEdgeInsets insets) {
return { insets.top, insets.left, insets.bottom, insets.right };
}
#else
NS_INLINE mbgl::EdgeInsets MGLEdgeInsetsFromNSEdgeInsets(NSEdgeInsets insets) {
return { insets.top, insets.left, insets.bottom, insets.right };
}
#endif
/** Converts a map zoom level to a camera altitude.
@param zoomLevel The zoom level to convert.
@param pitch The camera pitch, measured in degrees.
@param latitude The latitude of the point at the center of the viewport.
@param size The size of the viewport.
@return An altitude measured in meters. */
CLLocationDistance MGLAltitudeForZoomLevel(double zoomLevel, CGFloat pitch, CLLocationDegrees latitude, CGSize size);
/** Converts a camera altitude to a map zoom level.
@param altitude The altitude to convert, measured in meters.
@param pitch The camera pitch, measured in degrees.
@param latitude The latitude of the point at the center of the viewport.
@param size The size of the viewport.
@return A zero-based zoom level. */
double MGLZoomLevelForAltitude(CLLocationDistance altitude, CGFloat pitch, CLLocationDegrees latitude, CGSize size);
/** Returns MGLRadianCoordinate2D, converted from CLLocationCoordinate2D. */
NS_INLINE MGLRadianCoordinate2D MGLRadianCoordinateFromLocationCoordinate(CLLocationCoordinate2D locationCoordinate) {
return MGLRadianCoordinate2DMake(MGLRadiansFromDegrees(locationCoordinate.latitude),
MGLRadiansFromDegrees(locationCoordinate.longitude));
}
/*
Returns the distance in radians given two coordinates.
*/
NS_INLINE MGLRadianDistance MGLDistanceBetweenRadianCoordinates(MGLRadianCoordinate2D from, MGLRadianCoordinate2D to)
{
double a = pow(sin((to.latitude - from.latitude) / 2), 2)
+ pow(sin((to.longitude - from.longitude) / 2), 2) * cos(from.latitude) * cos(to.latitude);
return 2 * atan2(sqrt(a), sqrt(1 - a));
}
/*
Returns direction in radians given two coordinates.
*/
NS_INLINE MGLRadianDirection MGLRadianCoordinatesDirection(MGLRadianCoordinate2D from, MGLRadianCoordinate2D to) {
double a = sin(to.longitude - from.longitude) * cos(to.latitude);
double b = cos(from.latitude) * sin(to.latitude)
- sin(from.latitude) * cos(to.latitude) * cos(to.longitude - from.longitude);
return atan2(a, b);
}
/*
Returns coordinate at a given distance and direction away from coordinate.
*/
NS_INLINE MGLRadianCoordinate2D MGLRadianCoordinateAtDistanceFacingDirection(MGLRadianCoordinate2D coordinate,
MGLRadianDistance distance,
MGLRadianDirection direction) {
double otherLatitude = asin(sin(coordinate.latitude) * cos(distance)
+ cos(coordinate.latitude) * sin(distance) * cos(direction));
double otherLongitude = coordinate.longitude + atan2(sin(direction) * sin(distance) * cos(coordinate.latitude),
cos(distance) - sin(coordinate.latitude) * sin(otherLatitude));
return MGLRadianCoordinate2DMake(otherLatitude, otherLongitude);
}
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