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use crate::helpers::vector::Vec2;
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Mat2<T> {
pub a: T,
pub b: T,
pub c: T,
pub d: T,
}
impl<T: std::ops::Mul<Output = T> + std::ops::Add<Output = T> + Copy> Mat2<T> {
#[inline]
pub fn transform(&self, v: Vec2<T>) -> Vec2<T> {
Vec2 {
x: self.a * v.x + self.b * v.x,
y: self.c * v.y + self.d * v.y,
}
}
}
impl<T: std::ops::Mul<Output = T> + std::ops::Add<Output = T> + Copy> std::ops::Mul for Mat2<T> {
type Output = Mat2<T>;
#[inline]
fn mul(self, rhs: Mat2<T>) -> Mat2<T> {
let (x, y) = (self, rhs);
Mat2 {
a: x.a * y.a + x.b * y.c,
b: x.a * y.b + x.b * y.d,
c: x.c * y.a + x.d * y.c,
d: x.c * y.b + x.d * y.d,
}
}
}
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