依赖库
math_adapter={ version = "0.3.1", features = [ "cgmath_ops" ] }
实现
use math_adapter::plugin::cgmath::own::num_traits::{
float::FloatCore,
Float,
};
async fn haversine(lon1: f64, lat1: f64, lon2: f64, lat2: f64) -> f64 {
let lon1 = FloatCore::to_radians(lon1);
let lat1 = FloatCore::to_radians(lat1);
let lon2 = FloatCore::to_radians(lon2);
let lat2 = FloatCore::to_radians(lat2);
let dlon = lon2 - lon1;
let dlat = lat2 - lat1;
let s_dlat = Float::sin(dlat / 2.0);
let s_dlon = Float::sin(dlon / 2.0);
let a = s_dlat * s_dlat
+ Float::cos(lat1)
* Float::cos(lat2)
* s_dlon * s_dlon ;
let c = 2.0 * Float::asin(Float::sqrt(a));
let r = 6371.0;
c * r * 1000.0
}
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