org.opencv.core

Class Point

java.lang.Object

org.opencv.core.Point

public class Point
extends java.lang.Object

template class CV_EXPORTS Point_

// 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

};

Template class for 2D points specified by its coordinates

x and y. An instance of the class is interchangeable with C structures, CvPoint and CvPoint2D32f. There is also a cast operator to convert point coordinates to the specified type. The conversion from floating-point coordinates to integer coordinates is done by rounding. Commonly, the conversion uses thisoperation for each of the coordinates. Besides the class members listed in the declaration above, the following operations on points are implemented:

// 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;

See Also:

org.opencv.core.Point_

Field Summary

Fields

Modifier and Type	Field and Description
double	x
double	y

Constructor Summary

Constructors

Constructor and Description
Point()
Point(double[] vals)
Point(double x, double y)

Method Summary

Methods

Modifier and Type	Method and Description
Point	clone()
double	dot(Point p)
boolean	equals(java.lang.Object obj)
int	hashCode()
boolean	inside(Rect r)
void	set(double[] vals)
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Field Detail

x

public double x

y

public double y

Constructor Detail

Point

public Point()

Point

public Point(double[] vals)

Point

public Point(double x,
     double y)

Method Detail

clone

public Point clone()

Overrides:

clone in class java.lang.Object

dot

public double dot(Point p)

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

inside

public boolean inside(Rect r)

set

public void set(double[] vals)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object