This is the command fieldrheolef that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
field -- plot a field
field options filename[.field[.gz]]
Read and output a finite element field from file.
field square.field -bw
INPUT FILE SPECIFICATION
specifies the name of the file containing the input field.
- read field on standard input instead on a file.
-name 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 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.
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
-field output field on standard output stream in field text file format.
-gmsh 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.
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.
-max 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.
-bw 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.
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.
-fill 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.
-nocut Cut by a specified plane. The cutting plane is specified by its origin point and
normal vector. This option requires the mayavi or 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).
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.
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
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.
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.
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
Extract the i-th component of a vector-valued field. For a tensor-valued field,
indexing components as "00", "01", "11"... is supported.
Reduce the visualization to the specified domain.
print messages related to graphic files created and command system calls (this is
does not print previous messages.
-clean 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 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
FILE FORMAT CONVERSIONS
Use fieldrheolef online using onworks.net services