= "usage:\n"
"ansys2pml -n=nodes1.txt,..,nodesN.txt [-e=elem1.txt,..elemN.txt] [-t=ELEM_TYPE] [-o=output]\n"
"Transform nodes and elements ANSYS files to a PML\n"
"To produce a correct PML, the file are to be ordered the same way they were exported in ANSYS\n"
"(Note no space around '=')\n"
"Where the flags can be any of: \n"
" -n input node files separated by a comma\n"
" -e input element files separated by a comma\n"
" -t element type (see below)\n"
" -o output PML file name\n"
"\n"
"Element type defines the element geometry:\n"
"- TETRAHEDRON elements are tetrahedron, node index are integer #1, #2, #3 and #5 for each element file line\n"
"- QUAD elements are 2D quads, node index are integer #1, #2, #3 and #4 (I,J,K,L) for each element file line\n"