A Rust implementation of the Polylabel algorithm
```rust 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)
```
https://urschrei.github.io/polylabel-rs/polylabel/index.html
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