rectangle.rs

fn deg2meter_lng(lng: f64) -> f64 {
    111412.84 * lng.cos() - 93.5 * (3.0 * lng).cos() + 0.118 * (5.0 * lng).cos()
}

fn deg2meter_lat(lat: f64) -> f64 {
    111132.92 - 559.82 * (2.0 *lat).cos() + 1.175 * (4.0 *lat).cos() - 0.0023 * (6.0 *lat).cos()
}

fn get_stops_by_coordinates(c1: Coordinate, c2: Coordinate, r1: f64, r2: f64) -> String {
    let result : Vec<Stop> = Vec::new();

    // LAT = North to South (Y)
    // LNG = East to West   (X)


    let mut p1 : Coordinate = Coordinate {
        lat: 0.0,
        lng: 0.0
    };

    let mut p2 : Coordinate = Coordinate {
        lat: 0.0,
        lng: 0.0
    };

    if c1.lng < c2.lng {
        // Blue
        p1.lng = c1.lng + r1 * 1.0/deg2meter_lng(c1.lng);
        p1.lat = c1.lat - r1 * 1.0/deg2meter_lat(c1.lat);

        p2.lng = c2.lng - r2 * 1.0/deg2meter_lng(c2.lng);
        p2.lat = c2.lat - r2 * 1.0/deg2meter_lat(c2.lat);
    } else if c1.lng > c2.lng {
        // Orange
        p1.lng = c2.lng + r2 * 1.0/deg2meter_lng(c2.lng);
        p1.lat = c2.lat + r2 * 1.0/deg2meter_lat(c2.lat);

        p2.lng = c1.lng - r1 * 1.0/deg2meter_lng(c2.lng);
        p2.lat = c1.lat - r1 * 1.0/deg2meter_lat(c2.lat);
    }
    else {
        if c1.lng > c2.lng {
            // Orange
            p1.lng = c2.lng + r2 * 1.0/deg2meter_lng(c2.lng);
            p1.lat = c2.lat + r2 * 1.0/deg2meter_lat(c2.lat);

            p2.lng = c1.lng - r1 * 1.0/deg2meter_lng(c2.lng);
            p2.lat = c1.lat - r1 * 1.0/deg2meter_lat(c2.lat);
        } else {
            // Blue
            p1.lng = c1.lng + r1 * 1.0/deg2meter_lng(c1.lng);
            p1.lat = c1.lat - r1 * 1.0/deg2meter_lat(c1.lat);

            p2.lng = c2.lng - r2 * 1.0/deg2meter_lng(c2.lng);
            p2.lat = c2.lat - r2 * 1.0/deg2meter_lat(c2.lat);
        }
    }

    println!("P1: {}, {}", p1.lat, p1.lng);
    println!("P2: {}, {}", p2.lat, p2.lng);

    
    format!(r#"
    <img src="https://maps.googleapis.com/maps/api/staticmap?center={0},{1}&zoom=16&scale=1&size=600x300&maptype=roadmap&format=png&visual_refresh=true&markers=size:mid%7Ccolor:0x009fff%7Clabel:A%7C{0},{1}">
    <img src="https://maps.googleapis.com/maps/api/staticmap?center={2},{3}&zoom=16&scale=1&size=600x300&maptype=roadmap&format=png&visual_refresh=true&markers=size:mid%7Ccolor:0x009fff%7Clabel:B%7C{2},{3}">"#, 
    p1.lat, p1.lng,
    p2.lat, p2.lng)
}