System information (version)

• OpenCV => 3.3
• Operating System / Platform => Ubuntu16.04
• Compiler => GCC

Detailed description

what is the meaning of following comment on rotateCalipers function in https://github.com/opencv/opencv/blob/3.3.1/modules/imgproc/src/rotcalipers.cpp?

	 ((CvPoint2D32f*)out)[0] - corner
	 ((CvPoint2D32f*)out)[1] - vector1
	 ((CvPoint2D32f*)out)[0] - corner2