Struct Diagonal2 

pub struct Diagonal2 {
    pub xx: f64,
    pub yy: f64,
}

A diagonal matrix, suitable for representing anisotropic scaling.

Fields

xx: f64

The horizontal expansion factor.

yy: f64

The vertical expansion factor.

Implementations

impl Diagonal2

pub const fn new(xx: f64, yy: f64) -> Diagonal2

Create a diagonal matrix.

pub const fn inv(self) -> Diagonal2

Matrix inverse.

Will of course produce infinities if a component is zero.

pub const fn abs(self) -> Diagonal2

Absolute value of transform components.

pub fn scale_normal(self, n: Vec2) -> Vec2

Scale a normal vector.

This is mathematically equivalent to self * (self * n).normalize() for positive transforms, but handles zeros and gets the sign correct when negative.

Note that n need not be unit length.

Trait Implementations

impl Clone for Diagonal2

fn clone(&self) -> Diagonal2

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Diagonal2

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

Formats the value using the given formatter.

impl Mul<Point> for Diagonal2

type Output = Point

The resulting type after applying the * operator.

fn mul(self, rhs: Point) -> Point

Performs the * operation.

impl Mul<Vec2> for Diagonal2

type Output = Vec2

The resulting type after applying the * operator.

fn mul(self, rhs: Vec2) -> Vec2

Performs the * operation.

impl Neg for Diagonal2

type Output = Diagonal2

The resulting type after applying the - operator.

fn neg(self) -> Diagonal2

Performs the unary - operation.

impl PartialEq for Diagonal2

fn eq(&self, other: &Diagonal2) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Diagonal2

impl StructuralPartialEq for Diagonal2