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author | Jelle Raaijmakers <jelle@gmta.nl> | 2021-12-30 00:18:57 +0100 |
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committer | Andreas Kling <kling@serenityos.org> | 2021-12-30 14:24:29 +0100 |
commit | 57e1dc776558bc62067f9e027a00ba2f13229fad (patch) | |
tree | 12bb2c8fd189795a171b97ee6957dc891ba8be16 /Userland/Libraries/LibGfx | |
parent | 9bc8587c0d992699ad2360ef12c71a4175b79f47 (diff) | |
download | serenity-57e1dc776558bc62067f9e027a00ba2f13229fad.zip |
LibGfx: Add `Matrix3x3`
This defines `Matrix3x3`, `FloatMatrix3x3` and `DoubleMatrix3x3`
mirroring `Matrix4x4`. Since we will need matrix multiplication with a
`Vector3` for LibGL's normalization, we also add that `*` operator.
Diffstat (limited to 'Userland/Libraries/LibGfx')
-rw-r--r-- | Userland/Libraries/LibGfx/Matrix3x3.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Userland/Libraries/LibGfx/Matrix3x3.h b/Userland/Libraries/LibGfx/Matrix3x3.h new file mode 100644 index 0000000000..2f97714b48 --- /dev/null +++ b/Userland/Libraries/LibGfx/Matrix3x3.h @@ -0,0 +1,33 @@ +/* + * Copyright (c) 2021, Jelle Raaijmakers <jelle@gmta.nl> + * + * SPDX-License-Identifier: BSD-2-Clause + */ + +#pragma once + +#include <LibGfx/Matrix.h> +#include <LibGfx/Vector3.h> + +namespace Gfx { + +template<typename T> +using Matrix3x3 = Matrix<3, T>; + +template<typename T> +constexpr static Vector3<T> operator*(Matrix3x3<T> const& m, Vector3<T> const& v) +{ + auto const& elements = m.elements(); + return Vector3<T>( + v.x() * elements[0][0] + v.y() * elements[0][1] + v.z() * elements[0][2], + v.x() * elements[1][0] + v.y() * elements[1][1] + v.z() * elements[1][2], + v.x() * elements[2][0] + v.y() * elements[2][1] + v.z() * elements[2][2]); +} + +typedef Matrix3x3<float> FloatMatrix3x3; +typedef Matrix3x3<double> DoubleMatrix3x3; +} + +using Gfx::DoubleMatrix3x3; +using Gfx::FloatMatrix3x3; +using Gfx::Matrix3x3; |