element node data; this line repeats numel times, one for each
element
example:
(a) (b) (c) (d)
12 0 1 14 19 20 15
(a) element number -- global index of this element
(b) gen order -- used to specify a range of elements; generally just leave it 0 unless
doing something special.
(c) material type -- which of the above
material types to use for this element
(d) node numbers -- global node numbers corresponding to the four corners of this
element; ordered in counterclockwise rotation for 2-d case; repeat third number for collapsed triangles.
End element node block with two zeros.
The figure below illustrates the relationship between global node numbers
and element numbers for this example:
