Finds the four vertices of a rotated rectangle

points = cv.boxPoints(box)

Input

• box The input rotated rectangle. A structure with the following fields:
  • center The rectangle mass center [x,y].
  • size Width and height of the rectangle [w,h].
  • angle The rotation angle in a clockwise direction. When the angle is 0, 90, 180, 270 etc., the rectangle becomes an up-right rectangle.

Output

• points The output array of four vertices of rectangles. A 4-by-2 numeric matrix, each row a point: [x1 y1; x2 y2; x3 y3; x4 y4].

The function finds the four vertices of a rotated rectangle. This function is useful to draw the rectangle. You can also use cv.RotatedRect.points method. Please visit the tutorial on "Creating Bounding rotated boxes and ellipses for contours" for more information.