org.opencv.core
public class Point extends java.lang.Object
template
// 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_
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Constructor Summary
Constructors
Constructor and Description
Point()
Point(double[] vals)
Point(double x,
double y)
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Constructor Detail
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Point
public Point()
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Point
public Point(double[] vals)
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Point
public Point(double x,
double y)
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Method Detail
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clone
public Point clone()
- Overrides:
clone
in class java.lang.Object
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dot
public double dot(Point p)
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equals
public boolean equals(java.lang.Object obj)
- Overrides:
equals
in class java.lang.Object
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hashCode
public int hashCode()
- Overrides:
hashCode
in class java.lang.Object
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inside
public boolean inside(Rect r)
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set
public void set(double[] vals)
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toString
public java.lang.String toString()
- Overrides:
toString
in class java.lang.Object