Corners of a rectangle
Returns the four corners of a rectangle
This trivial function is occasionally convenient.
window is of type
"rectangle" this returns the
four corners of the window itself;
otherwise, it returns the corners of the bounding rectangle
of the window.
- A list with two components
y, which are numeric vectors of length 4 giving the coordinates of the four corner points of the (bounding rectangle of the) window.
w <- unit.square() corners(w) # returns list(x=c(0,1,0,1),y=c(0,0,1,1))