Struct ContourSet 

pub struct ContourSet {
    pub rings: Vec<Ring2D>,
    pub shape_offsets: Vec<usize>,
}

The result of a contour-set boolean: rings grouped into disjoint shapes.

Unlike Profile2D this holds any number of shapes, so a difference that splits its subject into islands loses nothing.

Fields

rings: Vec<Ring2D>

Every boundary ring, laid out shape by shape.

shape_offsets: Vec<usize>

shape_offsets[s] is the index in rings of shape s’s OUTER ring; the rings from there to the next offset (or the end) are that shape’s holes. Length == number of disjoint shapes.

Implementations

impl ContourSet

pub fn is_empty(&self) -> bool

True when the set holds no boundary rings. Every ContourSet produced by this module — a boolean result, or a soup that has been through sanitize (which the WASM constructor applies) — has had its non-contributing rings (under 3 vertices, non-finite, or exactly collinear) dropped, so for those this also means it covers no area.

pub fn shape_count(&self) -> usize

Number of disjoint shapes.

pub fn shape(&self, s: usize) -> Option<&[Ring2D]>

Rings of shape s (outer boundary first, then its holes), or None when s is out of range.

pub fn bounds(&self) -> Option<[f64; 4]>

Axis-aligned bounds [min_x, min_y, max_x, max_y], None when empty.

Cheap enough to be the first test in an occlusion loop: an accumulated occluder that does not overlap the next element’s outline needs no boolean at all.

Trait Implementations

impl Clone for ContourSet

fn clone(&self) -> ContourSet

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ContourSet

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

Formats the value using the given formatter.

impl Default for ContourSet

fn default() -> ContourSet

Returns the “default value” for a type.

impl PartialEq for ContourSet

fn eq(&self, other: &ContourSet) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ContourSet