abstract heightmap

gistfile1.cpp

template <typename elemT, size_t m_columns, size_t n_rows >
class Heightmap {
public:
  typedef std::array<elemT, n_rows * m_columns> container_t;
	const container_t& elems() const {return _elems;}
	container_t& elems() {return _elems;}
	const elemT& operator() (size_t c, size_t r) const {
		check_range(c,r); return _elems.at(r * n_rows + c);}
	elemT& operator() (size_t c, size_t r) {
		check_range(c,r);return _elems.at(r * n_rows + c);}
	virtual ~Heightmap() {};
private:
	container_t _elems;
	void check_range(size_t c, size_t r) const {
		if (c < 0 || c >= m_columns) throw std::out_of_range("c is invalid");
		if (r < 0 || r >= n_rows) throw std::out_of_range("r is invalid");
	}
};