Struct Layer 

pub struct Layer { /* private fields */ }

An owned planar layer. Cached views cannot be invalidated through mutation.

Caches do not depend on a topology or LayerId, so one Arc<Layer> can be registered in several topologies and its cleaned parts, indexes, polygon union and cross-geometry views are built once and reused.

Construction defers finite-coordinate and duplicate-FID checks until rule registration, warnings or validation. Cleaning removes consecutive duplicate coordinates and skips lines with fewer than two coordinates and polygon rings with fewer than four coordinates or three distinct vertices. A degenerate exterior skips the polygon; degenerate holes are skipped individually. Part indices retain the original traversal positions. Coordinate units are supplied by the caller; the core does not interpret or transform a CRS.

Implementations

impl Layer

pub fn from_geometries( name: impl Into<String>, geometries: impl IntoIterator<Item = Geometry>, ) -> Self

Own geometries in input order, assigning signed FIDs starting at zero. Validation is deferred until this layer’s parts are requested.

pub fn from_features( name: impl Into<String>, features: impl IntoIterator<Item = (i64, Geometry)>, ) -> Self

Own features in input order, preserving signed FIDs and original geometries. FIDs must be unique within this layer; validation is deferred.

pub fn name(&self) -> &str

Return the caller-supplied layer name, which need not be unique.

pub fn features(&self) -> impl ExactSizeIterator<Item = (i64, &Geometry)>

Iterate original, uncleaned features in input order.

pub fn feature(&self, index: usize) -> Option<(i64, &Geometry)>

Return the original feature at a zero-based input position.

pub fn len(&self) -> usize

Return the number of original features, including degenerate geometries.

pub fn is_empty(&self) -> bool

Return whether the layer contains no original features.

Trait Implementations

impl Debug for Layer

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

Formats the value using the given formatter.