Easier definition of interface elements

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Two new commands have been introduced in order to improve the user-friendliness of mesh generation for TNO interface elements.

The automatic meshing pre-check has been introduced for interface elements. Where necessary, and if possible, a body or surface with interface element attached will be automatically redefined such that its base component (surface or line) is correctly aligned with the current division settings. The (new) command that switches this on/off is MESHING OPTIONS CHECK INTER-ELS ON/OFF. A new resource variable has been introduced to do this automatically on entry into FEMGEN (see MESH section in the resource file femsys.ini).

Also, a new variant of the command MESHING TYPE has been introduced in order to specifiy a suitable orientation for a part for which an interface element has been attributed. Again, this involves an automatic redefintion of the underlying part if necessary and where possible. The full command is:

MESHING TYPE part_name el_type el_variant_specifier BASE integer/part_name

MESHING TYPE part_name el_type BASE integer/part_name

The integer allows the user to specifiy the base part by index to the list of constituent parts, or, by explicitly naming a part.

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