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Grid Tools: extract
The extract utility provides a tool to extract elements from a volume grid based on id, topology type, or angle criteria. The complete surface grid is always written to the output grid file.
| -igrid [file_name] | Specifies the input grid file name |
| -ogrid [file_name] | Specifies the output grid file name. If no output grid is specified, the default output file casename_out.b8.ugrid will be generated if necessary. |
| -globalminmax [#] | Prints the global minimum and maximum angles in the grid. |
| -min [#] | Writes all volume elements with angles less than the specified min value to the output grid file. May be used with -max option. |
| -max [#] | Writes all volume elements with angles less than the specified max value to the output grid file. May be used with -min option. |
| -negvol | Writes all elements having negative volumes to the specified file. |
| -tet [RANGE] or [all] | Writes tetrahedra within the specified RANGE to the output grid file. |
| -pent5 [RANGE] or [all] | Writes pyramids within the specified RANGE to the output grid file. |
| -pent6 [RANGE] or [all] | Writes prisms within the specified RANGE to the output grid file. |
| -hex [RANGE] or [all] | Writes hexehedra within the specified RANGE to the output grid file. |
| -help | Prints the help screen. |
| -version | Prints the version information of the executable and the associated libraries |
| -build | Prints the build number of the executable |
RANGE is specified as START VALUE .. END VALUE using a 1-based numbering or
all to extract every element of that type. For example, to extract the first 100 tetrahedra:
% extract -igrid input_grid_file -tet 1..100 -ogrid output_grid_file
Options listed in red are mandatory.
