cv::Point_< _Tp > クラステンプレート

Template class for 2D points specified by its coordinates x and y. [詳解]

#include <types.hpp>

公開型
typedef _Tp	value_type

公開メンバ関数
	Point_ ()
	default constructor
	Point_ (_Tp _x, _Tp _y)
	Point_ (const Point_ &pt)
	Point_ (Point_ &&pt) CV_NOEXCEPT
	Point_ (const Size_< _Tp > &sz)
	Point_ (const Vec< _Tp, 2 > &v)
Point_ &	operator= (const Point_ &pt)
Point_ &	operator= (Point_ &&pt) CV_NOEXCEPT
template<typename _Tp2 >
	operator Point_< _Tp2 > () const
	conversion to another data type
	operator Vec< _Tp, 2 > () const
	conversion to the old-style C structures
_Tp	dot (const Point_ &pt) const
	dot product
double	ddot (const Point_ &pt) const
	dot product computed in double-precision arithmetics
double	cross (const Point_ &pt) const
	cross-product
bool	inside (const Rect_< _Tp > &r) const
	checks whether the point is inside the specified rectangle

公開変数類
_Tp	x
	x coordinate of the point
_Tp	y
	y coordinate of the point

詳解

template<typename _Tp>
class cv::Point_< _Tp >

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 this operation for each of the coordinates. Besides the class members listed in the declaration above, the following operations on points are implemented:

pt1 = pt2 + pt3;
pt1 = pt2 - pt3;
pt1 = pt2 * a;
pt1 = a * pt2;
pt1 = pt2 / a;
pt1 += pt2;
pt1 -= pt2;
pt1 *= a;
pt1 /= a;
double value = norm(pt); // L2 norm
pt1 == pt2;
pt1 != pt2;

For your convenience, the following type aliases are defined:

typedef Point_<int> Point2i;
typedef Point2i Point;
typedef Point_<float> Point2f;
typedef Point_<double> 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;

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このクラス詳解は次のファイルから抽出されました:

• core/types.hpp