Software converts topology from T3D to SIFEL format, from T3D to GiD format and SIFEL format to GiD format. The syntax for use is following
./convertor input_file.con, where input_file.con includes keywords for conversion of the topology from one format to another one. The file consists of two sections - the first section with includes description of input topology and the second section includes description of output topology.
The structure of the first section is following:
topology_file file.txt - file with input topology
mesh_format sifel | t3d - type of the input file.

• t3d - output form T3D mesh generator.
• sifel - sifel topology format

edge_numbering 1
The structure of the second section is following:
output_file_name out_top.xub, where out_top.xub is name of output file/files from convertor. In the case of conversion of topology for parallel computing the output files will be in format out_top1.xub - out_top??.xub, where ?? is number of files.
conversion_type T3D2SIFEL | T3D2GID | SIFEL2GID

• T3D2SIFEL Conversion creates SIFEL topology format form T3D topology format. In the case of the 3D elements, the nodes on elements are reordered into ordering using in SIFEL format. There are no limitation on the type of the output suffix of filename.
• T3D2GIDConversion creates GID topology format form T3D topology format. There are limitation in the case of the suffix of filename. The suffix of filename will be always .msh
• SIFEL2GIDConversion creates GID topology format form SIFEL topology format. There are limitation in the case of the suffix of filename. The suffix of filename will be always .msh

processing seq | paral

• seq - input file consists of sequential topology
• paral - input file consists of parallel topology, in such a case the output file names will have above mentioned format. In the case of parallel processing the next line is
  number_of_files ndom, where ndom is the number of files (subdomains).

Example for sequential mesh. The file most.txt include T3D 3D mesh. The content of the file most.txt is here.
begsec_files
topology_file most.txt
mesh_format t3d
edge_numbering 1
endsec_files
begsec_convert
output_file_name most.top
conversion_type T3D2SIFEL
processing seq
endsec_convert
The result - most.top contains of reordered mesh in SIFEL topology format. The content of the file most.top is here.
Example for decomposed meshes. The files file1.top, file2.top, file3.top and file4.top include meshes with SIFEL topology format.
file1.top:
9
1 0.000000e+00 0.000000e+00 0.0 5 1 1 2 1 2 4 3 1 4 1
2 0.000000e+00 5.000000e-01 0.0 3 2 4 3 1 4 1
3 0.000000e+00 1.000000e+00 0.0 3 2 4 3 1 4 1
4 5.000000e-01 0.000000e+00 0.0 3 2 1 3 1 4 1
5 5.000000e-01 5.000000e-01 0.0 2 3 1 4 1
6 5.000000e-01 1.000000e+00 0.0 2 3 1 4 1
7 1.000000e+00 0.000000e+00 0.0 3 2 1 3 1 4 1
8 1.000000e+00 5.000000e-01 0.0 2 3 1 4 1
9 1.000000e+00 1.000000e+00 0.0 2 3 1 4 1
4
1 5 1 4 5 2 1 1 0 0 4 1
2 5 2 5 6 3 1 0 0 0 4 1
3 5 4 7 8 5 1 1 0 0 0 1
4 5 5 8 9 6 1 0 0 0 0 1
1 0
2 0
3 1
4 0
5 0
6 2
7 3
8 4
9 5
file2.top
9
1 0.000000e+00 1.000000e+00 0.0 3 2 4 3 2 4 1
2 0.000000e+00 1.500000e+00 0.0 3 2 4 3 2 4 1
3 0.000000e+00 2.000000e+00 0.0 5 1 4 2 3 2 4 3 2 4 1
4 5.000000e-01 1.000000e+00 0.0 2 3 2 4 1
5 5.000000e-01 1.500000e+00 0.0 2 3 2 4 1
6 5.000000e-01 2.000000e+00 0.0 3 2 3 3 2 4 1
7 1.000000e+00 1.000000e+00 0.0 2 3 2 4 1
8 1.000000e+00 1.500000e+00 0.0 2 3 2 4 1
9 1.000000e+00 2.000000e+00 0.0 3 2 3 3 2 4 1
4
1 5 1 4 5 2 1 0 0 0 4 2
2 5 2 5 6 3 1 0 0 3 4 2
3 5 4 7 8 5 1 0 0 0 0 2
4 5 5 8 9 6 1 0 0 3 0 2
1 1
2 0
3 0
4 2
5 0
6 0
7 5
8 6
9 7
file3.top
9
1 1.000000e+00 0.000000e+00 0.0 3 2 1 3 3 4 1
2 1.000000e+00 5.000000e-01 0.0 2 3 3 4 1
3 1.000000e+00 1.000000e+00 0.0 2 3 3 4 1
4 1.500000e+00 0.000000e+00 0.0 3 2 1 3 3 4 1
5 1.500000e+00 5.000000e-01 0.0 2 3 3 4 1
6 1.500000e+00 1.000000e+00 0.0 2 3 3 4 1
7 2.000000e+00 0.000000e+00 0.0 5 1 2 2 1 2 2 3 3 4 1
8 2.000000e+00 5.000000e-01 0.0 3 2 2 3 3 4 1
9 2.000000e+00 1.000000e+00 0.0 3 2 2 3 3 4 1
4
1 5 1 4 5 2 1 1 0 0 0 3
2 5 2 5 6 3 1 0 0 0 0 3
3 5 4 7 8 5 1 1 2 0 0 3
4 5 5 8 9 6 1 0 2 0 0 3
1 3
2 4
3 5
4 0
5 0
6 8
7 0
8 0
9 9
file4.top
9
1 1.000000e+00 1.000000e+00 0.0 2 3 4 4 1
2 1.000000e+00 1.500000e+00 0.0 2 3 4 4 1
3 1.000000e+00 2.000000e+00 0.0 3 2 3 3 4 4 1
4 1.500000e+00 1.000000e+00 0.0 2 3 4 4 1
5 1.500000e+00 1.500000e+00 0.0 2 3 4 4 1
6 1.500000e+00 2.000000e+00 0.0 3 2 3 3 4 4 1
7 2.000000e+00 1.000000e+00 0.0 3 2 2 3 4 4 1
8 2.000000e+00 1.500000e+00 0.0 3 2 2 3 4 4 1
9 2.000000e+00 2.000000e+00 0.0 5 1 3 2 2 2 3 3 4 4 1
4
1 5 1 4 5 2 1 0 0 0 0 4
2 5 2 5 6 3 1 0 0 3 0 4
3 5 4 7 8 5 1 0 2 0 0 4
4 5 5 8 9 6 1 0 2 3 0 4
1 5
2 6
3 7
4 8
5 0
6 0
7 9
8 0
9 0
File convert.pr contains:
begsec_files
topology_file file.top
mesh_format t3d
edge_numbering 1
endsec_files
begsec_convert
output_file_name file.msh
conversion_type SIFEL2GID
processing paral
number_of_files 4
endsec_convert
The results - file1.msh file2.msh file3.msh file4.msh contain of mesh in GID topology format. file1.msh
MESH "1-Quads4" dimension 3 Elemtype Quadrilateral Nnode 4
Coordinates
1 0.000000e+00 0.000000e+00 0.000000e+00
2 0.000000e+00 5.000000e-01 0.000000e+00
3 0.000000e+00 1.000000e+00 0.000000e+00
4 5.000000e-01 0.000000e+00 0.000000e+00
5 5.000000e-01 5.000000e-01 0.000000e+00
6 5.000000e-01 1.000000e+00 0.000000e+00
7 1.000000e+00 0.000000e+00 0.000000e+00
8 1.000000e+00 5.000000e-01 0.000000e+00
9 1.000000e+00 1.000000e+00 0.000000e+00
end Coordinates
Elements
1 1 4 5 2 1
2 2 5 6 3 1
3 4 7 8 5 1
4 5 8 9 6 1
end Elements
file2.msh
MESH "5-Quads4" dimension 3 Elemtype Quadrilateral Nnode 4
Coordinates
10 0.000000e+00 1.000000e+00 0.000000e+00
11 0.000000e+00 1.500000e+00 0.000000e+00
12 0.000000e+00 2.000000e+00 0.000000e+00
13 5.000000e-01 1.000000e+00 0.000000e+00
14 5.000000e-01 1.500000e+00 0.000000e+00
15 5.000000e-01 2.000000e+00 0.000000e+00
16 1.000000e+00 1.000000e+00 0.000000e+00
17 1.000000e+00 1.500000e+00 0.000000e+00
18 1.000000e+00 2.000000e+00 0.000000e+00
end Coordinates
Elements
5 10 13 14 11 1
6 11 14 15 12 1
7 13 16 17 14 1
8 14 17 18 15 1
end Elements
file3.msh
MESH "9-Quads4" dimension 3 Elemtype Quadrilateral Nnode 4
Coordinates
19 1.000000e+00 0.000000e+00 0.000000e+00
20 1.000000e+00 5.000000e-01 0.000000e+00
21 1.000000e+00 1.000000e+00 0.000000e+00
22 1.500000e+00 0.000000e+00 0.000000e+00
23 1.500000e+00 5.000000e-01 0.000000e+00
24 1.500000e+00 1.000000e+00 0.000000e+00
25 2.000000e+00 0.000000e+00 0.000000e+00
26 2.000000e+00 5.000000e-01 0.000000e+00
27 2.000000e+00 1.000000e+00 0.000000e+00
end Coordinates
Elements
9 19 22 23 20 1
10 20 23 24 21 1
11 22 25 26 23 1
12 23 26 27 24 1
end Elements
file4.msh
MESH "13-Quads4" dimension 3 Elemtype Quadrilateral Nnode 4
Coordinates
28 1.000000e+00 1.000000e+00 0.000000e+00
29 1.000000e+00 1.500000e+00 0.000000e+00
30 1.000000e+00 2.000000e+00 0.000000e+00
31 1.500000e+00 1.000000e+00 0.000000e+00
32 1.500000e+00 1.500000e+00 0.000000e+00
33 1.500000e+00 2.000000e+00 0.000000e+00
34 2.000000e+00 1.000000e+00 0.000000e+00
35 2.000000e+00 1.500000e+00 0.000000e+00
36 2.000000e+00 2.000000e+00 0.000000e+00
end Coordinates
Elements
13 28 31 32 29 1
14 29 32 33 30 1
15 31 34 35 32 1
16 32 35 36 33 1
end Elements

Jaroslav Broz 2010-11-11