How to get the diagonal point pairs of a 2D rectangle?

I am trying to find the diagonal point pair of an arbitrary input rectangle. i.e.

A = [1,1];
B = [-1,-1];
C = [1,-1];
D = [-1,1];

The expected output should be (A,B) and (C,D). The rectangle should be A,D,B,C in counterclockwise. Is there any function in Matlab could do it? I had tried ispolycw. But it only care the clockwise, not the diagonal. Any suggestion would be appreciated.

Answer 1

[Shubham Shukla]

A & B are diagonal points if both the coordinates of A and B differ, provided that the rectangle has non-zero width and height.

A = [x1, y1], B = [x2, y2]

if x1 ~= x2 and y1~=y2

" A and B are diagonal Pair"

Do this for all point pairs.