Struct piston_window::Viewport

pub struct Viewport {
    pub rect: [i32; 4],
    pub draw_size: [u32; 2],
    pub window_size: [f64; 2],
}

Stores viewport information.

Fields

rect: [i32; 4]

Viewport in pixels. [x, y, width, height] where (x, y) is lower left corner.

draw_size: [u32; 2]

The size of frame buffer in pixels.

window_size: [f64; 2]

The size of window in points.

Implementations

impl Viewport

pub fn abs_transform<T>(&self) -> [[T; 3]; 2]where
    T: Float,

Computes absolute transform for 2D graphics, which uses a row major 2x3 matrix. The origin is in the upper left corner of the viewport rectangle. The x-axis points to the right, and the y-axis points down. The units are in points (window coordinates).

It is assumed that the underlying coordinate system is normalized with the origin in the center, such that (-1.0, 1.0) in the underlying coordinate system corresponds to the upper left corner of the viewport.

Trait Implementations

impl Clone for Viewport

fn clone(&self) -> Viewport

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Viewport

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

Formats the value using the given formatter.

impl PartialEq<Viewport> for Viewport

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Viewport

impl StructuralPartialEq for Viewport