cv::RotatedRect Class Reference

The class represents rotated (i.e. not up-right) rectangles on a plane. More...

#include "types.hpp"

Public Member Functions
	RotatedRect ()
	various constructors More...
	RotatedRect (const Point2f &center, const Size2f &size, float angle)
	RotatedRect (const Point2f &point1, const Point2f &point2, const Point2f &point3)
Rect	boundingRect () const
	returns the minimal up-right integer rectangle containing the rotated rectangle More...
Rect_< float >	boundingRect2f () const
	returns the minimal (exact) floating point rectangle containing the rotated rectangle, not intended for use with images More...
void	points (Point2f pts[]) const

Public Attributes
float	angle
Point2f	center
Size2f	size

Detailed Description

The class represents rotated (i.e. not up-right) rectangles on a plane.

Each rectangle is specified by the center point (mass center), length of each side (represented by cv::Size2f structure) and the rotation angle in degrees.

The sample below demonstrates how to use RotatedRect:

Mat image(200, 200, CV_8UC3, Scalar(0));
RotatedRect rRect = RotatedRect(Point2f(100,100), Size2f(100,50), 30);

Point2f vertices[4];
rRect.points(vertices);
for (int i = 0; i < 4; i++)
    line(image, vertices[i], vertices[(i+1)%4], Scalar(0,255,0));

Rect brect = rRect.boundingRect();
rectangle(image, brect, Scalar(255,0,0));

imshow("rectangles", image);
waitKey(0);

image

See also

CamShift, fitEllipse, minAreaRect, CvBox2D

Examples:

camshiftdemo.cpp, fitellipse.cpp, and minarea.cpp.

Constructor & Destructor Documentation

RotatedRect() [1/3]

cv::RotatedRect::RotatedRect

(

)

various constructors

RotatedRect() [2/3]

cv::RotatedRect::RotatedRect	(	const Point2f &	center,
		const Size2f &	size,
		float	angle
	)

Parameters

center	The rectangle mass center.
size	Width and height of the rectangle.
angle	The rotation angle in a clockwise direction. When the angle is 0, 90, 180, 270 etc., the rectangle becomes an up-right rectangle.

RotatedRect() [3/3]

cv::RotatedRect::RotatedRect	(	const Point2f &	point1,
		const Point2f &	point2,
		const Point2f &	point3
	)

Any 3 end points of the RotatedRect. They must be given in order (either clockwise or anticlockwise).

Member Function Documentation

boundingRect()

Rect cv::RotatedRect::boundingRect

(

)

const

returns the minimal up-right integer rectangle containing the rotated rectangle

boundingRect2f()

Rect_<float> cv::RotatedRect::boundingRect2f

(

)

const

returns the minimal (exact) floating point rectangle containing the rotated rectangle, not intended for use with images

points()

void cv::RotatedRect::points

(

Point2f

pts[]

)

const

returns 4 vertices of the rectangle

Parameters

pts	The points array for storing rectangle vertices. The order is bottomLeft, topLeft, topRight, bottomRight.

Examples:

fitellipse.cpp, and minarea.cpp.

Member Data Documentation

angle

float cv::RotatedRect::angle

Examples:

fitellipse.cpp.

center

Point2f cv::RotatedRect::center

Examples:

fitellipse.cpp.

size

Size2f cv::RotatedRect::size

Examples:

fitellipse.cpp.

---

The documentation for this class was generated from the following file:

• core/include/opencv2/core/types.hpp