Struct PathBuilder 

pub struct PathBuilder { /* private fields */ }

Collects path verbs fluently and reports the first failure from Self::build.

Once a step fails, later steps are ignored so the reported error is the first one.

use motion_core::{Path2D, Point};
let path = Path2D::builder()
    .move_to(Point::ORIGIN)
    .line_to(Point::new(4.0, 0.0))
    .close()
    .build()?;
assert_eq!(path.verbs().len(), 3);
assert!(Path2D::builder().line_to(Point::ORIGIN).build().is_err());

Implementations

impl PathBuilder

pub fn new() -> Self

Creates an empty builder.

pub fn move_to(self, point: Point) -> Self

Starts a new subpath.

pub fn line_to(self, point: Point) -> Self

Adds a line; requires a preceding move.

pub fn quadratic_to(self, control: Point, end: Point) -> Self

Adds a quadratic Bezier; requires a preceding move.

pub fn cubic_to(self, first: Point, second: Point, end: Point) -> Self

Adds a cubic Bezier; requires a preceding move.

pub fn arc_to( self, center: Point, radii: Vector2, start_angle: f64, sweep_angle: f64, ) -> Self

Appends a clockwise elliptical arc; see Path2D::try_arc_to.

pub fn close(self) -> Self

Closes the current subpath; requires a preceding move.

pub fn build(self) -> Result<Path2D, ValidationError>

Returns the finished path or the first error recorded while building.

Trait Implementations

impl Clone for PathBuilder

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PathBuilder

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

Formats the value using the given formatter.

impl Default for PathBuilder

fn default() -> Self

Returns the “default value” for a type.