Struct Affine2 

pub struct Affine2<T: CoordinateScalar> {
    pub m: [T; 9],
    /* private fields */
}

3×3 affine matrix in homogeneous 2D coordinates.

Mirrors boost::geometry::strategy::transform::matrix_transformer<T, 2, 2> from matrix_transformers.hpp.

Fields

m: [T; 9]

Row-major: [a, b, tx, c, d, ty, 0, 0, 1].

Implementations

impl<T: CoordinateScalar> Affine2<T>

pub fn identity() -> Self

The identity transform.

pub fn translation(tx: T, ty: T) -> Self

Translation by (tx, ty).

pub fn scale(sx: T, sy: T) -> Self

Non-uniform scale by (sx, sy).

pub fn then(self, other: Self) -> Self

self ∘ other — apply other first, then self (standard matrix composition self * other).

impl Affine2<f64>

pub fn rotation(angle_rad: f64) -> Self

Rotation by angle_rad radians counter-clockwise. Only available for f64 (needs sin/cos, which the scalar trait does not yet expose generically).

std-gated: f64::sin_cos is not shimmed by geometry-coords under libm (only sqrt/abs are), so this constructor is unavailable in a no_std build.

Trait Implementations

impl<T: Clone + CoordinateScalar> Clone for Affine2<T>

fn clone(&self) -> Affine2<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Copy + CoordinateScalar> Copy for Affine2<T>

impl<T: Debug + CoordinateScalar> Debug for Affine2<T>

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

Formats the value using the given formatter.

impl<T, P> TransformStrategy<P> for Affine2<T>

where T: CoordinateScalar, P: Point<Scalar = T>, <P::Cs as CoordinateSystem>::Family: SameAs<CartesianFamily>,

type Output = Point<T, 2>

The destination point type.

fn transform(&self, src: &P) -> Self::Output

Apply the transform to src and return a fresh destination point.