#![allow(bad_style)]
#![allow(clippy::float_cmp)]

//! "Mat Mul-vec" is the 4th-wall-breaking brother of "Vec Mul-vec"

use hektor::*;

#[test]
fn Mat2_mul_Vec2() {
  let m = Mat2::diagonal(1.0, 1.0);
  let v = Vec2::new(3.0, 5.0);
  assert_eq!(m * v, v);
  //
  let m = Mat2::from([1.0, 2.0, 3.0, 4.0]);
  let v = Vec2::new(3.0, 5.0);
  assert_eq!(m * v, Vec2::new(18.0, 26.0));
}

#[test]
fn Mat3_mul_Vec3() {
  let m = Mat3::diagonal(1.0, 1.0, 1.0);
  let v = Vec3::new(3.0, 5.0, 10.0);
  assert_eq!(m * v, v);
  //
  let m = Mat3::from([1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0]);
  let v = Vec3::new(3.0, 5.0, -2.0);
  assert_eq!(m * v, Vec3::new(9.0, 15.0, 21.0));
}

#[test]
fn Mat4_mul_Vec4() {
  let m = Mat4::diagonal(1.0, 1.0, 1.0, 1.0);
  let v = Vec4::new(3.0, 5.0, 10.0, -7.0);
  assert_eq!(m * v, v);
  //
  let m = Mat4::from([
    1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0,
  ]);
  let v = Vec4::new(3.0, 5.0, -2.0, 1.0);
  assert_eq!(m * v, Vec4::new(23.0, 30.0, 37.0, 44.0));
}