GGU-STABILITY: "Define in quadrilateral" menu item

You can define the centre-points of the slip circles to be calculated via a quadrilateral array on the screen.

The system is displayed on the screen. With the mouse pointer you can specify the corner points of a centre-point array. To do this, you must give the four corner points of a quadrilateral. The first corner point is set with the left mouse button. Then, position the mouse at the second point and press the left mouse button a second time. If the first corner point is not according to your wishes, you can set it again after pressing the right mouse button (press the left mouse button). After specifying the corners of the quadrilateral, you must enter the number of subdivisions (in x and y direction).

By repeating the above procedure you can define several centre-points arrays. You can also carry out this action after centre-points have been calculated.