field options filename[.field[.gz]]
Read and output a finite element field from file.
field square.field field square.field -bw field box.field
INPUT FILE SPECIFICATION
specifies the name of the file containing
the input field.
- read field on standard input instead on a file.
- when the field comes from standard input, the file base name is not known and is set to "output" by default. This option allows to change this default. Useful when dealing with output formats (graphic, format conversion) that creates auxilliary files, based on this name.
- -I dir
Add dir to the rheolef file search path.
This option is usefull e.g. when the mesh .geo and the .field fikes are in
This mechanism initializes a search path given by the environment variable `RHEOPATH'.
If the environment variable `RHEOPATH' is not set, the default value is the current directory.
- -catchmark string
- Jump accross the file to the specifield string. Label start at the begining of a line, preceded by a `#' mark (see see catchmark(4)).
OUTPUT FILE FORMAT OPTIONS
- output field on standard output stream in Rheolef ascii (field or geo) text file format.
- output field on standard output stream in gmsh text file format.
- output field on standard output stream in gmsh-pos text file format, suitable for mesh adaptation purpose.
- output field on standard output stream in bamg-bb text file format, suitable for mesh adaptation purpose.
- -image-format string
- The argument is any valid image format, such as bitmap png, jpg, gif, tif, ppm, bmp or vectorial pdf, eps, ps, svg image file formats. this option can be used with the paraview and the gnuplot renders. The output file is e.g. basename.png when basename is the name of the mesh, or can be set with the -name option.
- -resolution int int
- The argument is a couple of sizes, for the image resolution. This option can be used together with the -image-format for any of the bitmap image formats. This option requires the paraview render.
- print the min (resp. max) value of the scalar field and then exit.
- use gnuplot tool. This is the default in one and two dimension.
- use mayavi tool. This is the default for tridimensional geometries.
- use paraview tool. This is feature is under development.
- Use (color/gray scale/black and white) rendering. Color rendering is the default.
- Show or hide title, color bar and various anotations. Default is to show labels.
- For two dimensional field, represent values as elevation in the third dimension. The default is no evelation.
- -scale float
- applies a multiplicative factor to the field. This is useful e.g. in conjonction with the elevation option. The default value is 1.
- Rendering mode suitable for red-blue anaglyph 3D stereoscopic glasses. This option is only available with mayavi and paraview.
- isoline intervals are filled with color. This is the default.
- draw isolines by using lines.
- for 3D data, render values using a colored translucid volume. This option requires the paraview code.
- Cut by a specified plane. The cutting plane is specified by its origin point and normal vector. This option requires the paraview code.
- -origin float [float [float]]
- set the origin of the cutting plane. Default is (0.5, 0.5, 0.5).
- -normal float [float [float]]
- set the normal of the cutting plane. Default is (1, 0, 0).
- -iso [float]
- do draw 3d isosurface. When the optional float is not provided, a median value is used. This option requires the paraview code.
- do not draw isosurface.
- -n-iso int
- For 2D visualizations, the isovalue table contains regularly spaced values from fmin to fmax, the bounds of the field.
- -proj approx
- Convert all selected fields to approximation approx by using a L2 projection.
- Convert all selected fields to Pk-continuous approximation by using a L2 projection.
- Force P1 approximation for L2 projection and use a lumped mass matrix for it.
- -round [float]
Round the input up to the specifiexd precision.
This option, combined with -field, leads to a round filter.
Usefull for non-regression test purpose, in order
to compare numerical results between files with a limited precision,
since the full double precision is machine-dependent.
- -n-iso-negative int
- The isovalue table is splitted into negatives and positives values. Assume there is n_iso=15 isolines: if 4 is requested by this option, then, there will be 4 negatives isolines, regularly spaced from fmin to 0 and 11=15-4 positive isolines, regularly spaced from 0 to fmax. This option is usefull when plotting e.g. vorticity or stream functions, where the sign of the field is representative.
- -subdivide int
When using a high order geometry, the number of points per edge used to draw
a curved element. Default value is the mesh order.
Render vector-valued fields as deformed mesh
using mayavi, paraview or gnuplot.
This is the default vector field representation.
Render vector-valued fields as arrows using mayavi or paraview.
COMPONENT EXTRACTION AND DOMAIN REDUCTION
- -comp int
- -comp string
- Extract the i-th component of a vector-valued field. For a tensor-valued field, indexing components as "00", "01", "11"... is supported.
- -domain name
- Reduce the visualization to the specified domain.
print messages related to graphic files created and
command system calls (this is the default).
does not print previous messages.
clear temporary graphic files (this is the default).
does not clear temporary graphic files.
execute graphic command (this is the default).
- does not execute graphic command. Generates only graphic files. This is usefull in conjuction with the -noclean command.
FIELD FILE FORMAT
It contains a header and a list values at degrees of freedom. The header contains the field keyword followed by a line containing a format version number (presently 1), the number of degrees of freedom (i.e. the number of values listed), the mesh file name without the `.geo' extension the approximation (e.g. P1, P2, etc), and finaly the list of values: A sample field file (compatible with the sample mesh example presented in command manual; see geo(1)) writes:
field 1 4 square P1 0.0 1.0 2.0 3.0
field cube.field -cut -normal 0 1 0 -origin 0.5 0.5 0.5 -vtkThis command send to vtk the cutted 2d plane of the 3d field.
field cube.field -cut -normal 0 1 0 -origin 0.5 0.5 0.5 -text > cube-cut.fieldThis command generates the cutted 2d field and its associated mesh.
field cube.field -iso 0.5This command draws the isosurface.
field cube.field -iso 0.5 -text > isosurf.geoThis command generates the isosurface as a 3d surface mesh in `.geo' format. This is suitable for others treatments.
INPUT FILE FORMAT OPTIONS
FILE FORMAT CONVERSIONS