GGU-3D-SSFLOW: "Define nodes" menu item

You can use the left mouse button to define a new node or the right mouse button to delete a previously defined node. This menu item can also be reached using [F3]. Each new point created with this menu item will be assigned the default depths z values (see "z/Default depths" menu item.

The current x- and y-coordinates of the mouse are shown in the status bar. If you have access to a scanner you can scan in the system to be processed and save it as a bitmap file (extension: .BMP). This bitmap can be displayed on the screen using the Mini-CAD program module (see the "Mini-CAD" manual). This greatly simplifies input of the principal system nodes. The size of the bitmap can be adjusted to scale. However, this is not a necessity for mesh generation. If you do not model the system to scale using a bitmap, you can perform a scale correction after coordinate input is complete by going to "Mesh(x/y)/Change" and selecting the "Using formula" button.

Alternatively, you can also import a DXF file using Mini-CAD (see "Mini-CAD" manual). This can contain the system outline, for example. If Mini-CAD data are already present, the initial dialog box provides the check box "Lock onto Mini-CAD lines". If you activate this check box the mouse cursor appears as a rectangle with cross-hairs. If the end point of a Mini-CAD line is located within this rectangle the program will lock onto this point precisely; if a number of points are located within the rectangle, it will lock onto the one nearest the centre of the cross-hairs.