Trait geo::algorithm::line_locate_point::LineLocatePoint

pub trait LineLocatePoint<T, Rhs> {
    type Output;
    type Rhs;
    fn line_locate_point(&self, p: &Rhs) -> Self::Output;
}

Returns a (option of the) fraction of the line’s total length representing the location of the closest point on the line to the given point.

If the line has zero length the fraction returned is zero.

If either the point’s coordinates or any coordinates of the line are not finite, returns None.

Examples

use geo::{LineString, point};
use geo::algorithm::line_locate_point::LineLocatePoint;

let linestring: LineString<f64> = vec![
    [-1.0, 0.0],
    [0.0, 0.0],
    [0.0, 1.0]
].into();

assert_eq!(linestring.line_locate_point(&point!(x: -1.0, y: 0.0)), Some(0.0));
assert_eq!(linestring.line_locate_point(&point!(x: -0.5, y: 0.0)), Some(0.25));
assert_eq!(linestring.line_locate_point(&point!(x: 0.0, y: 0.0)), Some(0.5));
assert_eq!(linestring.line_locate_point(&point!(x: 0.0, y: 0.5)), Some(0.75));
assert_eq!(linestring.line_locate_point(&point!(x: 0.0, y: 1.0)), Some(1.0));

Associated Types

type Output

type Rhs

Required methods

fn line_locate_point(&self, p: &Rhs) -> Self::Output

Implementors

impl<T> LineLocatePoint<T, Point<T>> for Line<T> where
    T: CoordFloat, 

type Output = Option<T>

type Rhs = Point<T>

impl<T> LineLocatePoint<T, Point<T>> for LineString<T> where
    T: CoordFloat + AddAssign,
    Line<T>: EuclideanDistance<T, Point<T>> + EuclideanLength<T>,
    LineString<T>: EuclideanLength<T>, 

type Output = Option<T>

type Rhs = Point<T>