Struct graphics::Ellipse

pub struct Ellipse { /* private fields */ }

The representation of a ellipse.

Implementations

impl Ellipse

pub fn from_coefficient(
    a: Float,
    b: Float,
    c: Float,
    d: Float,
    e: Float,
    f: Float
) -> Self

Create a new ellipse with the coefficient of equation.

A x^2 + B y^2 + C xy + D x + E y + F = 0

pub fn from_transform(
    center: &Point,
    major: Float,
    minor: Float,
    rotate: Float
) -> Self

Create a new ellipse with the center and the two axes and .

pub fn from_5_points(p1: &Point, p2: &Point, p3: &Point, p4: &Point, p5: &Point)

Create a new ellipse with 5 points.

impl Ellipse

pub fn major_axis(&self) -> Float

Return the center of the ellipse.

pub fn minor_axis(&self) -> Float

Get the minor axis of the ellipse.

pub fn major_delta(&self) -> Float

Get the major delta of the ellipse.

\Delta =
\begin{vmatrix}
A & B & D \\
B & C & E \\
D & E & F \\
\end{vmatrix}
= ACF+2BDE-AE^2-CD^2-FB^2

pub fn minor_delta(&self) -> Float

Get the minor delta of the ellipse.

\delta =
\begin{vmatrix}
A & B \\
B & C \\
\end{vmatrix}
= AC - B^2

pub fn rotate(&self) -> Float

Get the rotation of the ellipse.

\alpha=
\begin{cases}
\dfrac{1}{2}\arctan\dfrac{B}{A-C} &,  A \ne C\\
\dfrac{\pi}{4} &, A = C\\
\end{cases}

pub fn center(&self) -> Point

Get the center of the ellipse.

pub fn parameter(&self) -> (Float, Float, Float, Float, Float, Float)

Return the parameters.

Ax^2+2Bxy+Cy^2+2Dx+2Ey+F=0

pub fn parameter_matrix(&self) -> [[Float; 3]; 3]

Get the parameter of the ellipse.

Q = \begin{bmatrix}
A & B & D \\
B & C & E \\
D & E & F \\
\end{bmatrix}

pub fn transform(&self) -> (Point, Float, Float, Float)

Return the major axis of the ellipse.

pub fn transform_matrix(&self) -> [[Float; 3]; 3]

Return the major axis of the ellipse.

Trait Implementations

impl Clone for Ellipse

fn clone(&self) -> Ellipse

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Ellipse

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

Formats the value using the given formatter.

impl PartialEq<Ellipse> for Ellipse

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

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

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

This method tests for !=.

impl Copy for Ellipse

impl StructuralPartialEq for Ellipse