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Add matrix template

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Andrew Cassidy 2022-06-02 23:15:57 -07:00
parent 20305d2ea9
commit d3515c1db8
1 changed files with 50 additions and 0 deletions
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quicktex/Matrix.h Normal file
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/* Quicktex Texture Compression Library
Copyright (C) 2021 Andrew Cassidy <drewcassidy@me.com>
Partially derived from rgbcx.h written by Richard Geldreich <richgel99@gmail.com>
and licenced under the public domain
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <array>
#include "Vec.h"
namespace quicktex {
template <typename T, size_t M, size_t N> class Matrix : Vec<Vec<T, N>, M> {
// N: width, M:height
// when using as a buffer for batches, vectors are actually *columns*
public:
Vec<T, N> &row(size_t m) { return this->at(m); }
const Vec<T, N> &row(size_t m) const { return this->at(m); }
Vec<T, M> get_column(size_t n) {
Vec<T, M> res;
for (unsigned m = 0; m < M; m++) { res[m] = row(m)[n]; }
return res;
}
void set_column(size_t n, const Vec<T, M> &col) {
for (unsigned m = 0; m < M; m++) { row(m)[n] = col[m]; }
}
std::array<T *, M> get_column_ptrs(size_t index) const {
std::array<T *, M> ptrs;
for (unsigned i = 0; i < M; i++) { ptrs[i] = &(row(i)[index]); }
return ptrs;
}
};
} // namespace quicktex