Struct druid::piet::kurbo::Arc

pub struct Arc {
    pub center: Point,
    pub radii: Vec2,
    pub start_angle: f64,
    pub sweep_angle: f64,
    pub x_rotation: f64,
}

A single arc segment.

Fields

center: Point

The arc's centre point.

radii: Vec2

The arc's radii, where the vector's x-component is the radius in the positive x direction after applying x_rotation.

start_angle: f64

The start angle in radians.

sweep_angle: f64

The angle between the start and end of the arc, in radians.

x_rotation: f64

How much the arc is rotated, in radians.

Implementations

impl Arc

pub fn append_iter(&self, tolerance: f64) -> ArcAppendIter

Create an iterator generating Bezier path elements.

The generated elemets can be append to an existing bezier path.

pub fn to_cubic_beziers<P>(self, tolerance: f64, p: P) where
    P: FnMut(Point, Point, Point), 

Converts an Arc into a series of cubic bezier segments.

Closure will be invoked for each segment.

impl Arc

pub fn from_svg_arc(arc: &SvgArc) -> Option<Arc>

Creates an Arc from a SvgArc.

Returns None if arc is actually a straight line.

Trait Implementations

impl Clone for Arc

fn clone(&self) -> Arc

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Arc

impl Data for Arc

fn same(&self, other: &Self) -> bool

Determine whether two values are the same.

impl Debug for Arc

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

Formats the value using the given formatter.

impl PartialEq<Arc> for Arc

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Shape for Arc

type BezPathIter = Chain<Once<PathEl>, ArcAppendIter>

The iterator resulting from to_bez_path.

fn to_bez_path(&self, tolerance: f64) -> <Arc as Shape>::BezPathIter

Convert to a Bézier path, as an iterator over path elements.

fn area(&self) -> f64

Note: shape isn't closed so area is not well defined.

fn perimeter(&self, accuracy: f64) -> f64

Note: Finding the perimiter of an ellipse is fairly involved, so for now just approximate by using the bezier curve representation. (See https://en.wikipedia.org/wiki/Ellipse#Circumference)

fn winding(&self, pt: Point) -> i32

Note: shape isn't closed so a point's winding number is not well defined.

fn bounding_box(&self) -> Rect

The smallest rectangle that encloses the shape.

fn into_bez_path(self, tolerance: f64) -> BezPath

Convert into a Bézier path.

fn as_line(&self) -> Option<Line>

If the shape is a line, make it available.

fn as_rect(&self) -> Option<Rect>

If the shape is a rectangle, make it available.

fn as_rounded_rect(&self) -> Option<RoundedRect>

If the shape is a rounded rectangle, make it available.

fn as_circle(&self) -> Option<Circle>

If the shape is a circle, make it available.

fn as_path_slice(&self) -> Option<&[PathEl]>

If the shape is stored as a slice of path elements, make that available.

impl StructuralPartialEq for Arc