Struct Affine 

pub struct Affine(/* private fields */);

PDF 约定的六参数仿射变换，x’=ax+cy+e，y’=bx+dy+f。

Implementations

impl Affine

pub const IDENTITY: Self

pub fn values(self) -> [f64; 6]

返回值拷贝，供事实层记录完整变换，不暴露可变内部状态。

pub fn new(values: [f64; 6]) -> Result<Self, Error>

允许奇异矩阵以保留退化对象，但不允许 NaN 或无限值。

pub fn point(self, point: [f64; 2]) -> Result<[f64; 2], Error>

应用变换并检查中间结果溢出。

pub fn then(self, next: Self) -> Result<Self, Error>

先执行 self 再执行 next，适用于局部对象矩阵后接父级矩阵。

pub fn inverse(self) -> Result<Self, Error>

逆变换仅用于可逆坐标系；零行列式明确报错。

pub fn rect(self, rect: Rect) -> Result<Rect, Error>

变换矩形四角后求外框，不能仅变换对角线而丢失旋转或斜切范围。

Trait Implementations

impl Clone for Affine

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Affine

impl Debug for Affine

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

Formats the value using the given formatter.

impl PartialEq for Affine

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Affine