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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <cstdint>
#include <cmath>
namespace search::common {
/**
* An immutable struct for a (geo) location point,
* with methods for computing Great Circle Distance
* using the haversine formula
**/
struct GeoGcd
{
GeoGcd(double lat, double lng);
// haversine function:
static constexpr double haversine(double angle) {
double s = sin(0.5*angle);
return s*s;
}
double km_great_circle_distance(double lat, double lng) const;
private:
double _latitude_radians;
double _longitude_radians;
};
} // namespace
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