Struct cubic_spline::Point

pub struct Point {
    pub x: f64,
    pub y: f64,
    pub tension: Option<f64>,
}

The point in 2d coordinate system.

Fields

x: f64

x-axis point value.

y: f64

y-axis point value.

tension: Option<f64>

Optional tension of the curve between this point and the next point.

Implementations

impl Point

pub fn new(x: f64, y: f64) -> Self

Creates new point. You may prefer use From/Into implementations for this.

pub fn with_tension(x: f64, y: f64, tension: f64) -> Self

Creates new point with tension of the curve between it and the next point. If points creates with ::new the tension from SplineOpts will be used.

pub fn approx_eq(&self, other: &Point) -> bool

Tests the approximate equality of two points with default precision - DEFAULT_APPROX_EQ_PRECISION

use cubic_spline::Point;

assert!(Point::new(1.2,3.5).approx_eq(&[1.2, 3.5].into()));

pub fn approx_eq_with_precision(&self, other: &Point, precision: f64) -> bool

Tests the approximate equality with specific precision

use cubic_spline::Point;

assert!(Point::new(1.0,1.0).approx_eq_with_precision(&[1.000_001, 1.0].into(), 0.000_1));
assert!(Point::new(1.000_1,1.0).approx_eq_with_precision(&[1.0, 1.0].into(), 0.01));

pub fn invert_horizontally(&mut self, width: f64)

Inverts the x-value of the point based on the width of the canvas.

Example

use cubic_spline::Point;

let mut p = Point::new(1.0, 3.0);
p.invert_horizontally(3.0);

assert_eq!(p.x, 2.0);
assert_eq!(p.y, 3.0);

pub fn invert_vertically(&mut self, height: f64)

Inverts the y-value of the point based on the height of the canvas.

Example

use cubic_spline::Point;

let mut p = Point::new(1.0, 3.0);
p.invert_vertically(7.0);

assert_eq!(p.x, 1.0);
assert_eq!(p.y, 4.0);

Trait Implementations

impl Clone for Point

pub fn clone(&self) -> Point

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Point

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

Formats the value using the given formatter.

impl Default for Point

pub fn default() -> Point

Returns the "default value" for a type.

impl<'a> From<&'a Point> for Point

pub fn from(p: &'a Point) -> Self

Performs the conversion.

impl<'a, T: Copy> From<&'a T> for Point where
    T: Into<Point>, 

pub fn from(p: &'a T) -> Self

Performs the conversion.

impl<T> From<[T; 2]> for Point where
    (T, T): Into<Point>, 

pub fn from([x, y]: [T; 2]) -> Self

Performs the conversion.

impl From<(f64, f64)> for Point

pub fn from(p: (f64, f64)) -> Self

Performs the conversion.