makepad_vector/geometry/
linear_transformation.rs

1use crate::geometry::{Point, Transformation, Vector};
2
3#[derive(Clone, Copy, Debug, PartialEq)]
4#[repr(C)]
5pub struct LinearTransformation {
6    pub x: Vector,
7    pub y: Vector,
8}
9
10impl LinearTransformation {
11    pub fn new(x: Vector, y: Vector) -> LinearTransformation {
12        LinearTransformation { x, y }
13    }
14
15    pub fn identity() -> LinearTransformation {
16        LinearTransformation::new(Vector::new(1.0, 0.0), Vector::new(0.0, 1.0))
17    }
18
19    pub fn scaling(v: Vector) -> LinearTransformation {
20        LinearTransformation::new(Vector::new(v.x, 0.0), Vector::new(0.0, v.y))
21    }
22
23    pub fn uniform_scaling(k: f64) -> LinearTransformation {
24        LinearTransformation::scaling(Vector::new(k, k))
25    }
26
27    pub fn scale(self, v: Vector) -> LinearTransformation {
28        LinearTransformation::new(self.x * v.x, self.y * v.y)
29    }
30
31    pub fn uniform_scale(self, k: f64) -> LinearTransformation {
32        LinearTransformation::new(self.x * k, self.y * k)
33    }
34
35    pub fn compose(self, other: LinearTransformation) -> LinearTransformation {
36        LinearTransformation::new(
37            self.transform_vector(other.x),
38            self.transform_vector(other.y),
39        )
40    }
41}
42
43impl Transformation for LinearTransformation {
44    fn transform_point(&self, p: Point) -> Point {
45        (self.x * p.x + self.y * p.y).to_point()
46    }
47
48    fn transform_vector(&self, v: Vector) -> Vector {
49        self.x * v.x + self.y * v.y
50    }
51}
makepad_vector/geometry/linear_transformation.rs

makepad_vector/geometry/
linear_transformation.rs
