use crate::{Line, Point, Size};
use ::std::convert::From;
use ::std::ops::Add;
#[derive(Copy, Clone, PartialEq)]
pub struct Transform {
scale: Size,
position: Point,
}
impl Transform {
pub fn new() -> Self {
Self {
position: Point(0.0, 0.0),
scale: Size(1.0, 1.0),
}
}
pub fn set_position(mut self, position: Point) -> Self {
self.position = position;
self
}
pub fn position(&self) -> Point<f32> {
self.position
}
pub fn flip_x(&self) -> bool {
self.scale.width() < 1.0
}
pub fn flip_y(&self) -> bool {
self.scale.height() < 1.0
}
pub fn set_flip_x_from_dir(self, dir: f32) -> Self {
self.set_flip_x_from_bool(dir < 0.0)
}
pub fn set_flip_y_from_dir(self, dir: f32) -> Self {
self.set_flip_y_from_bool(dir < 0.0)
}
pub fn set_flip_x_from_bool(self, is_flipped: bool) -> Self {
if is_flipped {
self.set_scale_width(-1.0)
} else {
self.set_scale_width(1.0)
}
}
pub fn set_flip_y_from_bool(self, is_flipped: bool) -> Self {
if is_flipped {
self.set_scale_height(-1.0)
} else {
self.set_scale_height(1.0)
}
}
fn set_scale_width(mut self, scale_width: f32) -> Self {
self.scale.set_width(scale_width);
self
}
fn set_scale_height(mut self, scale_height: f32) -> Self {
self.scale.set_height(scale_height);
self
}
pub fn set_scale(mut self, scale: Size) -> Self {
self.scale = scale;
self
}
pub fn scale(self) -> Size {
self.scale
}
}
impl Add<Line> for Transform {
type Output = Line;
fn add(self, line: Self::Output) -> Self::Output {
(line * self.scale()) + self.position()
}
}
impl From<Point<f32>> for Transform {
fn from(p: Point<f32>) -> Transform {
Transform::new().set_position(p)
}
}
impl From<Size<f32>> for Transform {
fn from(s: Size<f32>) -> Transform {
Transform::new().set_scale(s)
}
}