#include <Eigen/Core>

template <typename TYPE>
class TPoint3
{
public:
	typedef Eigen::Matrix<TYPE,3,1> EVec;
	EVec v;

public:
	inline TPoint3() {}
	inline TPoint3(const TYPE& _x, const TYPE& _y, const TYPE& _z) : v(_x, _y, _z) {}

	inline operator const EVec& () const { return v; }
	inline operator EVec& () { return v; }
};

int main()
{
	typedef double TYPE;
	TPoint3<TYPE> X(0,1,2);
	Eigen::Matrix<TYPE,3,1> eX(X);
	return 0;
}