1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
use glam::{Mat4, Vec3, Vec4};
use std::ops::Mul;
/// A 2D transformation matrix.
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Transformation(Mat4);
impl Transformation {
/// Get the identity transformation.
pub fn identity() -> Transformation {
Transformation(Mat4::identity())
}
/// Creates an orthographic projection.
#[rustfmt::skip]
pub fn orthographic(width: u16, height: u16) -> Transformation {
Transformation(Mat4::from_cols(
Vec4::new(2.0 / f32::from(width), 0.0, 0.0, 0.0),
Vec4::new(0.0, 2.0 / f32::from(height), 0.0, 0.0),
Vec4::new(0.0, 0.0, -1.0, 0.0),
Vec4::new(-1.0, -1.0, 0.0, 1.0)
))
}
/// Creates a translate transformation.
pub fn translate(x: f32, y: f32) -> Transformation {
Transformation(Mat4::from_translation(Vec3::new(x, y, 0.0)))
}
/// Creates a scale transformation.
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().clone()
}
}
|
