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use glam::{Mat4, Vec3};
use std::ops::Mul;
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Transformation(Mat4);
impl Transformation {
pub fn identity() -> Transformation {
Transformation(Mat4::identity())
}
#[rustfmt::skip]
pub fn orthographic(width: u32, height: u32) -> Transformation {
Transformation(Mat4::orthographic_rh_gl(
0.0, width as f32,
height as f32, 0.0,
-1.0, 1.0
))
}
pub fn translate(x: f32, y: f32) -> Transformation {
Transformation(Mat4::from_translation(Vec3::new(x, y, 0.0)))
}
pub fn scale(x: f32, y: f32) -> Transformation {
Transformation(Mat4::from_scale(Vec3::new(x, y, 1.0)))
}
}
impl Mul for Transformation {
type Output = Self;
fn mul(self, rhs: Self) -> Self {
Transformation(self.0 * rhs.0)
}
}
impl AsRef<[f32; 16]> for Transformation {
fn as_ref(&self) -> &[f32; 16] {
self.0.as_ref()
}
}
impl From<Transformation> for [f32; 16] {
fn from(t: Transformation) -> [f32; 16] {
*t.as_ref()
}
}