src/matrix.h

#pragma once
#include <QMetaType>

template<int Rows, int Columns, typename T = double>
struct Matrix
{
	T values[Rows][Columns];
	T& operator()(int row, int column)
	{
		return this->values[row][column];
	}
	T operator()(int row, int column) const
	{
		return this->values[row][column];
	}
};

using Matrix3x3 = Matrix<3, 3>;
Q_DECLARE_METATYPE(Matrix3x3);
using Matrix4x4 = Matrix<4, 4>;
Q_DECLARE_METATYPE(Matrix4x4);