Method resize

include/PointSet.h:116–129

	}

	void resize(Real const* x, std::size_t n)
	{ 
		m_x = x;
		m_n = n; 
		m_keys.resize(n, {
			std::numeric_limits<int>::lowest(),
			std::numeric_limits<int>::lowest(),
			std::numeric_limits<int>::lowest() }); 
		m_old_keys.resize(n, {
			std::numeric_limits<int>::lowest(),
			std::numeric_limits<int>::lowest(),
			std::numeric_limits<int>::lowest() });
		m_neighbors.resize(n);
	}

	Real const* point(unsigned int i) const { return &m_x[3*i]; }