Struct MapCamera 

pub struct MapCamera {
    pub origin: Point,
    pub zoom: f64,
}

The camera: which canvas point stands at the viewport’s top-leading corner, and how many screen pixels a canvas pixel takes.

Fields

origin: Point

zoom: f64

Implementations

impl MapCamera

pub fn to_screen(self, corner: Point, p: Point) -> Point

Where canvas point p is on screen, for a viewport whose top-leading corner is at corner.

pub fn to_canvas(self, corner: Point, p: Point) -> Point

The canvas point under screen point p.

pub fn zoom_about(&mut self, corner: Point, about: Point, factor: f64)

Zoom by factor about the screen point about, keeping the canvas point under it in place. The zoom stays within MAP_ZOOM_MIN and MAP_ZOOM_MAX.

pub fn pan_by(&mut self, delta: Vec2)

Move the camera by a screen-space delta.

pub fn same(self, other: MapCamera) -> bool

Whether two cameras look at the same canvas the same way.

Trait Implementations

impl Clone for MapCamera

fn clone(&self) -> MapCamera

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MapCamera

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

Formats the value using the given formatter.

impl Default for MapCamera

fn default() -> MapCamera

Returns the “default value” for a type.

impl PartialEq for MapCamera

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

impl StructuralPartialEq for MapCamera