Struct ZoomTransform 

pub struct ZoomTransform {
    pub scale: f64,
    pub center_x: f64,
    pub center_y: f64,
}

A scale-about-a-focal-point transform for one composed frame.

The renderer scales the framed screen by scale (>= 1.0) about the normalized focal point (center_x, center_y) in [0, 1]. At identity (scale == 1.0) the focal point is irrelevant — no push-in is applied.

Fields

scale: f64

Zoom factor, >= 1.0. 1.0 is no zoom.

center_x: f64

Horizontal focal point, 0.0..=1.0 (0 left, 1 right).

center_y: f64

Vertical focal point, 0.0..=1.0 (0 top, 1 bottom).

Implementations

impl ZoomTransform

pub fn identity() -> Self

The no-zoom transform — full frame, centred.

pub fn is_identity(self) -> bool

Whether this transform is (approximately) no-zoom.

Trait Implementations

impl Clone for ZoomTransform

fn clone(&self) -> ZoomTransform

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ZoomTransform

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

Formats the value using the given formatter.

impl Default for ZoomTransform

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for ZoomTransform

fn eq(&self, other: &ZoomTransform) -> 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 ZoomTransform

impl StructuralPartialEq for ZoomTransform