set-origin

Sets the device origin, i.e., the location in device coordinates of (0, 0) in logical coordinates.

Changing a dc<%> object's origin or scale invalidates region% objects associated with the device context. See region% for more information.

Restrictions on the magnitude of drawing coordinates are described with dc<%>.

• (send a-dc set-origin x y) -> void
      x : real number
      y : real number