field(1rheolef) rheolef-6.1 field(1rheolef)
NAME
field -- plot a field
SYNOPSIS
field options filename[.field[.gz]]
DESCRIPTION
Read and output a finite element field from file.
EXAMPLE
field square.field
field square.field -bw
field box.field
INPUT FILE SPECIFICATION
filename
specifies the name of the file containing the input field.
- read field on standard input instead on a file.
-Idir
-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 different
directories. 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.
@item -catchmark label Jump accross the file to the specifield label. Label start at the begining of a line, preceded by a `#' mark
(see see catchmark(4)).
OUTPUT FILE FORMAT OPTIONS
-field output field on standard output stream in field text file format.
-gmsh output field on standard output stream in gmsh text file format.
-gmsh-pos
output field on standard output stream in gmsh-pos text file format, suitable for mesh adaptation purpose.
-bamg-bb
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 or vectorial ps or pdf image file formats, and that could be
handled by the corresponding render. The output file is e.g. `@emph{basename'.png} when @emph{basename} is the name of the mesh, or
can be set with the -name option.
GETTING INFORMATION
-min
-max print the min (resp. max) value of the scalar field and then exit.
RENDER OPTIONS
-gnuplot
use gnuplot tool. This is the default in one and two dimension.
-mayavi
use mayavi tool. This is the default for tridimensional geometries.
RENDERING OPTIONS
-color
-gray
-black-and-white
-bw Use (color/gray scale/black and white) rendering. Color rendering is the default.
-elevation
-noelevation
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.
-stereo
-nostereo
Rendering mode suitable for red-blue anaglyph 3D stereoscopic glasses. This option is only available with mayavi.
-fill isoline intervals are filled with color. This is the default.
-nofill
draw isolines by using lines.
-cut
-nocut Cut by a specified plane. The cutting plane is specified by its origin point and normal vector. This option requires the mayavi
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 mayavi code.
-noiso 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 Convert all selected fields to Pk-continuous approximation by using a L2 projection.
-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 preci-
sion 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 representa-
tive.
-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.
-deformation
Render vector-valued fields as deformed mesh using mayavi or gnuplot. This is the default vector field representation.
-velocity
Render vector-valued fields as arrows using mayavi.
COMPONENT EXTRACTION
-comp int
Extract a component of a vector-valued field.
OTHERS OPTIONS
-verbose
print messages related to graphic files created and command system calls (this is the default).
-noverbose
does not print previous messages.
-clean clear temporary graphic files (this is the default).
-noclean
does not clear temporary graphic files.
-execute
execute graphic command (this is the default).
-noexecute
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
EXAMPLES
field cube.field -cut -normal 0 1 0 -origin 0.5 0.5 0.5 -vtk
This 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.field
This command generates the cutted 2d field and its associated mesh.
field cube.field -iso 0.5 -plotmtv
This command draws the isosurface.
field cube.field -iso 0.5 -text > isosurf.geo
This command generates the isosurface as a 3d surface mesh in `.geo' format. This is suitable for others treatments.
INPUT FILE FORMAT OPTIONS
TODO
FILE FORMAT CONVERSIONS
TODO
GETTING INFORMATION
TODO
SEE ALSO
catchmark(4), geo(1)
rheolef-6.1 rheolef-6.1 field(1rheolef)