Polylabel-rs

A Rust implementation of the Polylabel algorithm

How to Use

extern crate polylabel;
use polylabel::polylabel;

extern crate geo;
use geo::{Point, LineString, Polygon};

let coords = vec![
    (0.0, 0.0),
    (4.0, 0.0),
    (4.0, 1.0),
    (1.0, 1.0),
    (1.0, 4.0),
    (0.0, 4.0),
    (0.0, 0.0)
];
let ls = LineString(coords.iter().map(|e| Point::new(e.0, e.1)).collect());
let poly = Polygon(ls, vec![]);
let label_pos = polylabel(&poly, &0.10);
// Point(0.5625, 0.5625)

FFI

Call polylabel_ffi with:

• Array (exterior Polygon ring)
• WrapperArray (interior Polygon rings)
• tolerance a c_float

The function returns a struct with two c_double fields:

• x_pos
• y_pos

A Python example is available in ffi.py

License

MIT