Function strip_closing

nodedb-spatial/src/predicates/intersection.rs:190–196

Strip the closing vertex from a ring if present.

(ring: &[[f64; 2]])

/// Strip the closing vertex from a ring if present.
fn strip_closing(ring: &[[f64; 2]]) -> Vec<[f64; 2]> {
    if ring.len() >= 2 && ring.first() == ring.last() {
        ring[..ring.len() - 1].to_vec()
    } else {
        ring.to_vec()
    }
}

/// Clip a linestring to a polygon: keep only the parts inside.
fn clip_linestring_to_polygon(line: &[[f64; 2]], rings: &[Vec<[f64; 2]>]) -> Geometry {