1 files changed, 16 insertions, 26 deletions
diff --git a/platform/darwin/src/MGLGeometry_Private.h b/platform/darwin/src/MGLGeometry_Private.h
index 88fcf5b576..8b9c6c2327 100644
--- a/platform/darwin/src/MGLGeometry_Private.h
+++ b/platform/darwin/src/MGLGeometry_Private.h
@@ -105,36 +105,26 @@ NS_INLINE MGLRadianCoordinate2D MGLRadianCoordinateFromLocationCoordinate(CLLoca
                                      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));
-}
+MGLRadianDistance MGLDistanceBetweenRadianCoordinates(MGLRadianCoordinate2D from, MGLRadianCoordinate2D to);
 
-/*
+/**
  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);
-}
+MGLRadianDirection MGLRadianCoordinatesDirection(MGLRadianCoordinate2D from, MGLRadianCoordinate2D to);
+
+/**
+ Returns a coordinate at a given distance and direction away from coordinate.
+ */
+MGLRadianCoordinate2D MGLRadianCoordinateAtDistanceFacingDirection(MGLRadianCoordinate2D coordinate,
+                                                                   MGLRadianDistance distance,
+                                                                   MGLRadianDirection direction);
 
-/*
- Returns coordinate at a given distance and direction away from coordinate.
+/**
+ Returns the direction from one coordinate to another.
  */
-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);
-}
+CLLocationDirection MGLDirectionBetweenCoordinates(CLLocationCoordinate2D firstCoordinate, CLLocationCoordinate2D secondCoordinate);
+
+CGPoint MGLPointRounded(CGPoint point);