Export the identifiers of the four vertices of each element contained in the finest triangulation. If a filename is given the file is created or overwritten. In any case the list is printed in the text window.
The vertices are numbered from 0 onwards by .Since the identifiers are expected to start
from 1 they are increased by one for the output file.
The ids printed in the text window remain unchanged.
The order of output lines represents the order of
elements in the list they are stored in. The
assumes that this order is not changed. There are two reasons why the
element's identifier is not taken into account.
First, it would be quite inefficient to scan the
whole list for each element to get them in the right order.
Secondly, there are many ``father'' elements
which are important for the multi-grid algorithm but do not belong to the
Other programs expect the elements of the mesh to be numbered
consecutively, which is impossible with the internal ids
since these ``father'' elements have to be left out.