Struct ShoelaceArea 

pub struct ShoelaceArea;

Cartesian shoelace area for a Ring.

Mirrors boost::geometry::strategy::area::cartesian<> from strategy/cartesian/area.hpp:50-120 applied to a ring through the dispatch::area<Ring, ring_tag> arm at algorithms/area.hpp:154-157.

Sign convention follows Boost: rings whose vertices match the declared PointOrder yield a positive area, rings traversed in the opposite direction yield a negative area (test/algorithms/area/area.cpp:63-64).

Trait Implementations

impl<R> AreaStrategy<R> for ShoelaceArea

where R: Ring, <R::Point as Point>::Cs: CoordinateSystem, <<R::Point as Point>::Cs as CoordinateSystem>::Family: SameAs<CartesianFamily>,

type Out = <<R as Geometry>::Point as Point>::Scalar

The output scalar type. Typically the geometry’s coordinate scalar. Mirrors area_result<G, Strategies>::type from algorithms/area_result.hpp.

fn area(&self, r: &R) -> Self::Out

Compute the area of g.

impl Clone for ShoelaceArea

fn clone(&self) -> ShoelaceArea

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ShoelaceArea

impl Debug for ShoelaceArea

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ShoelaceArea

fn default() -> ShoelaceArea

Returns the “default value” for a type.