Struct pizarra::transform::Transform

pub struct Transform {
    pub xx: f64,
    pub yx: f64,
    pub xy: f64,
    pub yy: f64,
    pub x0: f64,
    pub y0: f64,
}

Fields

xx: f64

yx: f64

xy: f64

yy: f64

x0: f64

y0: f64

Implementations

impl Transform

pub fn new_scale(factor: f64) -> Transform

pub fn new_translate(vector: Vec2D) -> Transform

pub fn new_rotate(angle: Angle) -> Transform

Returns a rotating transform that rotates the world angle degrees counterclockwise

pub fn default_for_viewport(viewport_dimensions: Vec2DScreen) -> Transform

Computes a transform to go back to 1.0 zoom with the drawing’s origin centered in the viewport.

pub fn zoom(&self, factor: f64, fixed: Vec2DScreen) -> Transform

Objects on the screen look factor times bigger. Specified fixed point is, well, fixed in the sense that before and after the zoom this point maps to the same point of the world.

pub fn turn(&self, angle: Angle, fixed: Vec2DScreen) -> Transform

Objects on the screen rotate angle. Rotation happens around the specified fixed point

pub fn move(&self, delta: Vec2DScreen) -> Transform

Objects on the screen move by this delta in screen units

pub fn to_screen_coordinates(&self, p: Vec2DWorld) -> Vec2DScreen

pub fn to_world_coordinates(&self, p: Vec2DScreen) -> Vec2DWorld

pub fn to_world_units(&self, length: f64) -> f64

Trait Implementations

impl Clone for Transform

fn clone(&self) -> Transform

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Transform

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

Formats the value using the given formatter.

impl Default for Transform

fn default() -> Transform

Returns the “default value” for a type.

impl Copy for Transform