RoundedPolygon class final

A closed polygonal shape, with optional rounding at its vertices.

A polygon can be built from a number of vertices, or from an ordered list of vertices.

Annotations

• @immutable

Constructors

RoundedPolygon(int numVertices, {double radius = 1.0, Offset center = .zero, CornerRounding rounding = .unrounded, List<CornerRounding>? perVertexRounding})

Creates a regular polygon with numVertices vertices, equally spaced around a circle of the given radius about center.

factory

RoundedPolygon.circle({int numVertices = 8, double radius = 1.0, Offset center = .zero})

Creates a circle of the given radius about center, approximated by rounding a polygon of numVertices vertices.

factory

RoundedPolygon.fromFeatures(List<PolygonFeature> features, {Offset? center})

Creates a polygon from features, which describe each segment of its outline.

factory

RoundedPolygon.fromVertices(List<Offset> vertices, {CornerRounding rounding = .unrounded, List<CornerRounding>? perVertexRounding, Offset? center})

Creates a polygon with the given vertices.

factory

RoundedPolygon.pill({double width = 2.0, double height = 1.0, double smoothing = 0.0, Offset center = .zero})

Creates a pill about center, width wide and height high: a rectangle capped by a semicircle at either end of its longer dimension.

factory

RoundedPolygon.pillStar({double width = 2.0, double height = 1.0, int numVerticesPerRadius = 8, double innerRadiusRatio = 0.5, CornerRounding rounding = .unrounded, CornerRounding? innerRounding, List<CornerRounding>? perVertexRounding, double vertexSpacing = 0.5, double startLocation = 0.0, Offset center = .zero})

Creates a pill star about center, width wide and height high: a RoundedPolygon.pill with inner and outer radii along its outline, the way a RoundedPolygon.star has them along a circle, with numVerticesPerRadius vertices on each.

factory

RoundedPolygon.rectangle({double width = 2.0, double height = 2.0, CornerRounding rounding = .unrounded, List<CornerRounding>? perVertexRounding, Offset center = .zero})

Creates a rectangle width wide and height high about center, with optional rounding at its four corners.

factory

RoundedPolygon.star({required int numVerticesPerRadius, double radius = 1.0, double innerRadius = 0.5, CornerRounding rounding = .unrounded, CornerRounding? innerRounding, List<CornerRounding>? perVertexRounding, Offset center = .zero})

Creates a star about center, with numVerticesPerRadius vertices on the outer radius alternating with as many on the innerRadius.

factory

Properties

center → Offset

The center of this polygon, around which all vertices are placed.

no setter

cubics → List<CubicBezier>

A flattened version of the PolygonFeatures, as a List<CubicBezier>.

no setter

features → List<PolygonFeature>

The PolygonFeatures this polygon is composed of.

no setter

hashCode → int

The hash code for this object.

late, final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

calculateApproximateBounds() → Rect

A cheaper alternative to calculateBounds, based on the min/max values of all anchor and control points that make up this shape.

calculateBounds() → Rect

Calculates the axis-aligned bounds of this shape.

calculateMaxBounds() → Rect

Like calculateBounds, calculates the axis-aligned bounds of this shape, but determines the max dimension of the shape (by calculating the distance from its center to the start and midpoint of each curve) and returns a square which can be used to hold the object in any rotation.

normalized() → RoundedPolygon

Returns a new RoundedPolygon, moving and resizing this one, so it's completely inside the (0, 0) -> (1, 1) square, centered if there is extra space in one direction.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toPath({double startAngle = 0.0, bool repeatPath = false, bool closePath = true, Path? path}) → Path

Returns a Path for this polygon.

toString() → String

A string representation of this object.

override

transformed(ShapePointTransformer transformer) → RoundedPolygon

Returns a new RoundedPolygon with every point of this one, including its center, mapped through transformer.

Operators

operator ==(Object other) → bool

The equality operator.

override