Struct transit_model::objects::Approx

pub struct Approx { /* fields omitted */ }

Proxy object to compute approximate distances.

Methods

impl Approx

pub fn sq_distance_to(&self, coord: &Coord) -> f64

Returns the squared distance to coord. Squared distance is returned to skip a sqrt call, that is not important for distance comparison or sorting.

Example

let v: Vec<Coord> = get_coords();
let from = Coord { lon: 2.37715, lat: 48.846781 };
let one_km_squared = 1_000. * 1_000.;
let approx = from.approx();
for coord in &v {
    if approx.sq_distance_to(coord) < one_km_squared {
        println!("{:?} is within 1km", coord);
    }
}