Struct Area 

pub struct Area {
    pub x: f64,
    pub y: f64,
    pub w: f64,
    pub h: f64,
}

A rectangle, in image pixels.

Floating point all the way to the paint, and rounded once: rounding each level as it is laid out accumulates, and a treemap whose children do not quite fill their parent has a seam down it that reads as a boundary nobody put there.

Fields

x: f64

Left edge.

y: f64

Top edge.

w: f64

Width.

h: f64

Height.

Implementations

impl Area

pub fn of(w: f64, h: f64) -> Self

A rectangle at the origin.

pub fn size(&self) -> f64

How much of the map this rectangle covers.

Trait Implementations

impl Clone for Area

fn clone(&self) -> Area

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Area

impl Debug for Area

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

Formats the value using the given formatter.

impl Default for Area

fn default() -> Area

Returns the “default value” for a type.

impl Hash for Area

fn hash<H: Hasher>(&self, state: &mut H)

By bit pattern, because these are only ever hashed to answer “is this the same picture as last frame” — where two rectangles that differ in the last bit really are a different frame, and no rectangle is ever a NaN.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Area

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Area