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Support constructing a matrix by rows/columns

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This commit is contained in:
Nikita Lisitsa 2020-10-16 07:37:22 +03:00
parent 6eacee38f0
commit 639f8650d4
1 changed files with 24 additions and 0 deletions
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24
libs/geom/include/psemek/geom/matrix.hpp
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@ -235,4 +235,28 @@ namespace psemek::geom
return r;
}
template <typename T, std::size_t N, typename ... Rows>
auto by_rows(vector<T, N> const & v, Rows const & ... rows)
{
vector<T, N> m[] = {v, rows...};
matrix<T, sizeof...(Rows) + 1, N> result;
for (std::size_t i = 0; i < result.rows; ++i)
for (std::size_t j = 0; j < result.columns; ++j)
result[i][j] = m[i][j];
return result;
}
template <typename T, std::size_t N, typename ... Columns>
auto by_columns(vector<T, N> const & v, Columns const & ... columns)
{
vector<T, N> m[] = {v, columns...};
matrix<T, N, sizeof...(Columns) + 1> result;
for (std::size_t i = 0; i < result.rows; ++i)
for (std::size_t j = 0; j < result.columns; ++j)
result[i][j] = m[j][i];
return result;
}
}