Element: graphic_window.view_corners[2]
Element: graphic_window.view_corners[2]point
The 3-D points corresponding to the bottom-left and top-right corners of the visible part of graphic_window. If the graphic window is scrollable then these values will change whenever the window is scrolled. To access the corners of the full (virtual) graphic canvas use window.corners.
They may be changed by the user only if the current view is a plan or elevation view. This will result in a redefinition of the virtual corners.