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96 lines
3.7 KiB
C++
96 lines
3.7 KiB
C++
/* Quicktex Texture Compression Library
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Copyright (C) 2021-2022 Andrew Cassidy <drewcassidy@me.com>
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Partially derived from rgbcx.h written by Richard Geldreich <richgel99@gmail.com>
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and licenced under the public domain
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <array>
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#include <cassert>
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#include <cstddef>
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#include <functional>
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#include "Vector4.h"
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namespace quicktex {
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class Matrix4x4 {
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public:
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static Matrix4x4 Identity() {
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Matrix4x4 result;
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for (unsigned i = 0; i < 4; i++) { result[i][i] = 1; }
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return result;
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}
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static Matrix4x4 Transpose(const Matrix4x4 &val) {
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Matrix4x4 result;
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for (unsigned r = 0; r < 3; r++) {
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for (unsigned c = 0; c < 3; c++) { result[r][c] = val[c][r]; }
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}
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return result;
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}
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Vector4 operator[](size_t index) const {
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assert(index < 4);
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return _r[index];
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}
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Vector4 &operator[](size_t index) {
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assert(index < 4);
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return _r[index];
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}
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friend Matrix4x4 operator*(const Matrix4x4 &lhs, const Matrix4x4 &rhs);
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friend Vector4 operator*(const Matrix4x4 &lhs, const Vector4 &rhs);
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friend Matrix4x4 operator+(const Matrix4x4 &lhs, const Matrix4x4 &rhs) { return DoOp(lhs, rhs, std::plus()); }
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friend Matrix4x4 operator-(const Matrix4x4 &lhs, const Matrix4x4 &rhs) { return DoOp(lhs, rhs, std::minus()); }
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friend Matrix4x4 operator+(const Matrix4x4 &lhs, const float &rhs) { return DoOp(lhs, rhs, std::plus()); }
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friend Matrix4x4 operator-(const Matrix4x4 &lhs, const float &rhs) { return DoOp(lhs, rhs, std::minus()); }
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friend Matrix4x4 operator*(const Matrix4x4 &lhs, const float &rhs) { return DoOp(lhs, rhs, std::multiplies()); }
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friend Matrix4x4 operator/(const Matrix4x4 &lhs, const float &rhs) { return DoOp(lhs, rhs, std::divides()); }
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friend Matrix4x4 &operator+=(Matrix4x4 &lhs, const Matrix4x4 &rhs) { return lhs = lhs + rhs; }
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friend Matrix4x4 &operator-=(Matrix4x4 &lhs, const Matrix4x4 &rhs) { return lhs = lhs - rhs; }
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friend Matrix4x4 &operator*=(Matrix4x4 &lhs, const Matrix4x4 &rhs) { return lhs = lhs * rhs; }
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friend Matrix4x4 &operator+=(Matrix4x4 &lhs, const float &rhs) { return lhs = lhs + rhs; }
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friend Matrix4x4 &operator-=(Matrix4x4 &lhs, const float &rhs) { return lhs = lhs - rhs; }
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friend Matrix4x4 &operator*=(Matrix4x4 &lhs, const float &rhs) { return lhs = lhs * rhs; }
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friend Matrix4x4 &operator/=(Matrix4x4 &lhs, const float &rhs) { return lhs = lhs / rhs; }
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Matrix4x4 Transpose() const { return Transpose(*this); }
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void Mirror();
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private:
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template <typename Op> friend Matrix4x4 DoOp(const Matrix4x4 &lhs, const Matrix4x4 &rhs, Op f) {
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Matrix4x4 result;
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for (unsigned r = 0; r < 4; r++) { result[r] = f(lhs[r], rhs[r]); }
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return result;
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}
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template <typename Op> friend Matrix4x4 DoOp(const Matrix4x4 &lhs, const float &rhs, Op f) {
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Matrix4x4 result;
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for (unsigned r = 0; r < 4; r++) { result[r] = f(lhs[r], rhs); }
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return result;
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}
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std::array<Vector4, 4> _r;
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};
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} // namespace quicktex
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