80 lines
2.6 KiB
C#
80 lines
2.6 KiB
C#
using OSMDatastructure.Graph;
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namespace OSMDatastructure
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{
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public struct Utils
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{
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public static double DistanceBetween(Coordinates c1, Coordinates n2)
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{
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return DistanceBetween(c1.latitude, c1.longitude, n2.latitude, n2.longitude);
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}
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public static double DistanceBetween(Coordinates c1, float lat2, float lon2)
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{
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return DistanceBetween(c1.latitude, c1.longitude, lat2, lon2);
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}
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public static double DistanceBetween(float lat1, float lon1, Coordinates c2)
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{
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return DistanceBetween(c2, lat1, lon1);
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}
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public static double DistanceBetween(OsmNode node1, OsmNode node2)
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{
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return DistanceBetween(node1.coordinates, node2.coordinates);
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}
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public static double DistanceBetween(OsmNode node1, Coordinates c2)
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{
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return DistanceBetween(node1.coordinates, c2);
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}
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public static double DistanceBetween(Coordinates c1, OsmNode n2)
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{
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return DistanceBetween(c1, n2.coordinates);
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}
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public static double DistanceBetween(float lat1, float lon1, float lat2, float lon2) //Law of Cosines
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{
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/*
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* From https://www.movable-type.co.uk/scripts/latlong.html
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*/
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double rlat1 = DegreesToRadians(lat1);
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double rlat2 = DegreesToRadians(lat2);
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double drlon = DegreesToRadians(lon2 - lon1);
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const int R = 6371000;
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double d = Math.Acos(Math.Sin(rlat1) * Math.Sin(rlat2) + Math.Cos(rlat1) * Math.Cos(rlat2) * Math.Cos(drlon)) * R;
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return d;
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}
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public static double DistanceBetweenHaversine(float lat1, float lon1, float lat2, float lon2)
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{
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/*
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* From https://www.movable-type.co.uk/scripts/latlong.html
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*/
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const int R = 6371000;
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double rlat1 = DegreesToRadians(lat1);
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double rlat2 = DegreesToRadians(lat2);
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double rdlat = DegreesToRadians(lat2 - lat1);
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double drlon = DegreesToRadians(lon2 - lon1);
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double a = Math.Sin(rdlat / 2) * Math.Sin(rdlat / 2) + Math.Cos(rlat1) * Math.Cos(rlat2) * Math.Sin(drlon / 2) * Math.Sin(drlon / 2);
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double c = 2 * Math.Atan2(Math.Sqrt(a), Math.Sqrt(1 - a));
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double d = R * c;
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return d;
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}
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public static double DegreesToRadians(double deg)
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{
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return deg * Math.PI / 180.0;
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}
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public static double RadiansToDegrees(double rad)
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{
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return rad * 180.0 / Math.PI;
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}
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}
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} |