26 lines
917 B
C++
26 lines
917 B
C++
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#include <math.h>
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#include <string>
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const double PI = 3.141592653589793238462;
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class MapUtils {
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private:
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static const wchar_t intToBase64[64]= {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','0','1','2','3','4','5','6','7','8','9','_','@'};
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static const string BASE_SHORT_OSM_URL = "http://osm.org/go/";
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double toRadians(double a) {
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return a / 180.0 * PI;
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}
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double getDistance(double lat1, double lon1, double lat2, double lon2) {
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double R = 6371;
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double dLat = toRadians(lat2-lat1);
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double dLon = toRadians(lon2-lon1);
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double a = sin(dLat/2) * sin(dLat/2) +
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cos(toRadians(lat1)) * cos(toRadians(lat2)) *
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sin(dLon/2) * sin(dLon/2);
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double c = 2 * atan2(sqrt(a), sqrt(1-a));
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return R * c * 1000;
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}
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}
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