Struct CubicFn 

pub struct CubicFn { /* private fields */ }

A cubic function, which is a polynomial of the form ax^3 + bx^2 + cx + d.

Implementations

impl CubicFn

pub const fn constant(y: f64) -> Self

Creates a cubic function which outputs the fixed value y for any input.

pub fn fit(x1: f64, y1: f64, dydx1: f64, x2: f64, y2: f64, dydx2: f64) -> Self

Creates a cubic function which passes through the two specified points, and which has the specified derivates at those two points.

pub fn translate_x(&self, amount: f64) -> CubicFn

Returns a copy of this CubicFn translated to the left by amount units.

pub fn y(&self, x: f64) -> f64

Evaluates the function at x.

pub fn dy(&self, x: f64) -> f64

Evaluates the derivative of the function at x.

pub fn y_and_dy(&self, x: f64) -> (f64, f64)

Evaluates the value of the function, and the derivative of the function, at x.

Trait Implementations

impl Clone for CubicFn

fn clone(&self) -> CubicFn

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CubicFn

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CubicFn

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for CubicFn

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for CubicFn