// C++ code:

public:

typedef _Tp value_type;

// various constructors

Point_();

Point_(_Tp _x, _Tp _y);

Point_(const Point_& pt);

Point_(const CvPoint& pt);

Point_(const CvPoint2D32f& pt);

Point_(const Size_<_Tp>& sz);

Point_(const Vec<_Tp, 2>& v);

Point_& operator = (const Point_& pt);

//! conversion to another data type

template operator Point_<_Tp2>() const;

//! conversion to the old-style C structures

operator CvPoint() const;

operator CvPoint2D32f() const;

operator Vec<_Tp, 2>() const;

//! dot product

_Tp dot(const Point_& pt) const;

//! dot product computed in double-precision arithmetics

double ddot(const Point_& pt) const;

//! cross-product

double cross(const Point_& pt) const;

//! checks whether the point is inside the specified rectangle

bool inside(const Rect_<_Tp>& r) const;

_Tp x, y; //< the point coordinates

};

// C++ code:

pt1 = pt2 + pt3;

pt1 = pt2 - pt3;

pt1 = pt2 * a;

pt1 = a * pt2;

pt1 += pt2;

pt1 -= pt2;

pt1 *= a;

double value = norm(pt); // L2 norm

pt1 == pt2;

pt1 != pt2;

For your convenience, the following type aliases are defined:

typedef Point_ Point2i;

typedef Point2i Point;

typedef Point_ Point2f;

typedef Point_ Point2d;

Example:

Point2f a(0.3f, 0.f), b(0.f, 0.4f);

Point pt = (a + b)*10.f;

cout << pt.x << ", " << pt.y << endl;