diff options
Diffstat (limited to 'tests/affine2.rs')
| -rw-r--r-- | tests/affine2.rs | 77 |
1 files changed, 73 insertions, 4 deletions
diff --git a/tests/affine2.rs b/tests/affine2.rs index e547dbb..205caa4 100644 --- a/tests/affine2.rs +++ b/tests/affine2.rs @@ -147,11 +147,83 @@ macro_rules! impl_affine2_tests { should_glam_assert!({ $affine2::ZERO.inverse() }); }); + glam_test!(test_affine2_decompose, { + // identity + let (out_scale, out_rotation, out_translation) = + $affine2::IDENTITY.to_scale_angle_translation(); + assert_approx_eq!($vec2::ONE, out_scale); + assert_eq!(out_rotation, 0.0); + assert_approx_eq!($vec2::ZERO, out_translation); + + // no scale + let in_scale = $vec2::ONE; + let in_translation = $vec2::new(-2.0, 4.0); + let in_rotation = $t::to_radians(-45.0); + let in_mat = + $affine2::from_scale_angle_translation(in_scale, in_rotation, in_translation); + let (out_scale, out_rotation, out_translation) = in_mat.to_scale_angle_translation(); + assert_approx_eq!(in_scale, out_scale, 1e-6); + assert_approx_eq!(in_rotation, out_rotation); + assert_approx_eq!(in_translation, out_translation); + assert_approx_eq!( + in_mat, + $affine2::from_scale_angle_translation(out_scale, out_rotation, out_translation), + 1e-6 + ); + + // positive scale + let in_scale = $vec2::new(1.0, 2.0); + let in_mat = + $affine2::from_scale_angle_translation(in_scale, in_rotation, in_translation); + let (out_scale, out_rotation, out_translation) = in_mat.to_scale_angle_translation(); + assert_approx_eq!(in_scale, out_scale, 1e-6); + assert_approx_eq!(in_rotation, out_rotation); + assert_approx_eq!(in_translation, out_translation); + assert_approx_eq!( + in_mat, + $affine2::from_scale_angle_translation(out_scale, out_rotation, out_translation), + 1e-5 + ); + + // negative scale + let in_scale = $vec2::new(-4.0, 1.0); + let in_mat = + $affine2::from_scale_angle_translation(in_scale, in_rotation, in_translation); + let (out_scale, out_rotation, out_translation) = in_mat.to_scale_angle_translation(); + assert_approx_eq!(in_scale, out_scale, 1e-6); + assert_approx_eq!(in_rotation, out_rotation); + assert_approx_eq!(in_translation, out_translation); + assert_approx_eq!( + in_mat, + $affine2::from_scale_angle_translation(out_scale, out_rotation, out_translation), + 1e-5 + ); + + // negative scale + let in_scale = $vec2::new(4.0, -1.0); + let in_mat = + $affine2::from_scale_angle_translation(in_scale, in_rotation, in_translation); + let (out_scale, out_rotation, out_translation) = in_mat.to_scale_angle_translation(); + // out_scale and out_rotation are different but they produce the same matrix + // assert_approx_eq!(in_scale, out_scale, 1e-6); + // assert_approx_eq!(in_rotation, out_rotation); + assert_approx_eq!(in_translation, out_translation); + assert_approx_eq!( + in_mat, + $affine2::from_scale_angle_translation(out_scale, out_rotation, out_translation), + 1e-6 + ); + }); + glam_test!(test_affine2_ops, { let m0 = $affine2::from_cols_array_2d(&MATRIX2D); assert_approx_eq!(m0, m0 * $affine2::IDENTITY); assert_approx_eq!(m0, $affine2::IDENTITY * m0); + let mut m1 = m0; + m1 *= $affine2::IDENTITY; + assert_approx_eq!(m1, m0); + let mat3 = $mat3::from(m0); assert_approx_eq!(mat3, $affine2::IDENTITY * mat3); assert_approx_eq!(mat3, mat3 * $affine2::IDENTITY); @@ -181,10 +253,7 @@ macro_rules! impl_affine2_tests { glam_test!(test_product, { let ident = $affine2::IDENTITY; - assert_eq!( - vec![ident, ident].iter().product::<$affine2>(), - ident * ident - ); + assert_eq!([ident, ident].iter().product::<$affine2>(), ident * ident); }); glam_test!(test_affine2_is_finite, { |