Provided by: ncl-ncarg_6.6.2-1build4_amd64 
NAME
ictrans - interactive NCAR CGM translator ctrans
SYNOPSIS
ictrans [ -d device ] [ -font font ] [ -e script ]* [ -soft ] [ -bell ] [ -lmin min ] [ -lmax max ] [
-lscale scale ] [ -pal pal_fname ] [ -Version ] [ -wid window_id ] [ device-specific options ]
metafile...
DESCRIPTION
ictrans is the user interface to the Computer Graphics Metafile (CGM) translator ctrans. ictrans will
enter command interpreter mode upon invocation and await instructions from the user. When waiting for
commands from the user, ictrans displays the prompt `ictrans>'.
Upon invocation ictrans performs a configuration of its spooled device table. The table is configured by
processing several sources. ictrans first searches for the file ncarv_spool in the $NCARG_ROOT/lib/ncarg
directory. If the file exists ictrans will load it into the spooled device table. Next, ictrans searches
for the file .ncarv_spool in the user's home directory. If found, its contents are merged into the
spooler table. Finally, the NCARV_SPOOL environment variable may contain the definition for a single
spooler. If this variable is set, its contents also are merged into the table. Each entry in the above
set of sources is identified by a name. If a conflict in names exists then the last entry encountered
takes precedence. i.e. the previous entry of the same name is overridden.
OPTIONS
-bell Ring the bell at the end of each frame. The default is to run in silent mode. This option is not
supported by all devices.
-d device
Device name. ictrans will use the Graphcap (if it exists) or the appropriate graphics library
indicated by device;
If device is preceded by a UNIX directory path then ictrans will look in that directory for the
specified graphcap. Otherwise ictrans searches the directory $NCARG_ROOT/lib/ncarg/graphcaps for
the graphcap.
For all device specifications except X11 output is directed to standard out. In the case of X11
translation results in appropriate calls to the X11 libraries. See graphcap(5NCARG) for a
description of supported devices. See gcaps(1NCARG) for a list of devices supported by your
particular configuration of ctrans.
This option overrides the GRAPHCAP environment variable.
-e script
script is a single ictrans command. The valid ictrans commands are discussed in the COMMANDS
section below. Multiple -e options may appear on a single command line. Be careful to use quotes
if your command contains spaces or metacharacters that might be interpreted by the shell. When
this option is used ictrans does not enter interactive mode. It simply performs the given commands
and then exits.
-font fontcap
Fontcap file to be used for stroking text. When interpreting CGM TEXT command elements use
fontcap as the default font for textual translation. Note: CGMs may contain textual descriptions
which are not embedded in CGM TEXT elements. Hence they are not influenced by fontcap
specifications. Note also that a CGM may explicitly specify a named font which may override a
font provided on the command line. The environment variable FONTCAP may also be used to specify a
default fontcap.
If fontcap is preceded by a UNIX directory path then ictrans will look in that directory for the
specified fontcap. Otherwise ictrans searches the directory $NCARG_ROOT/lib/ncarg/fontcaps for the
fontcap.
See fontcap(5NCARG) for a description of the available fontcaps. See fcap(1NCARG) for a list of
the fontcaps installed on your system.
This option overrides the FONTCAP environment variable.
-lmin min
On devices which support line width scaling all lines are guaranteed to be scaled at least min
times the default line width for that device. This option effectively insures that the minimum
value for the CGM element "LINE WIDTH" is min.
-lmax max
On devices which support line width scaling all lines are guaranteed to be scaled at most max
times the default line width for that device. This option effectively insures that the maximum
value for the CGM element "LINE WIDTH" is max. The results of setting max less then min are
undefined.
-lscale scale
On devices which support line width scaling all line width specifications within the metafile will
be scaled by scale. will be scaled scale This option is subject to modification by the -lmin and
-lmax options.
-pal pal_fname
Use the color palette defined in the file pal_fname for subsequent translation of the metafile.
This palette will override any color map defined by the CGM being translated. For a description of
the format of pal_fname see ras_palette(5NCARG).
-soft Unconditionally perform software filling of all filled polygons. This option may be useful for
devices which have limits on the number of vertices describing a polygon. On some devices this
number is known and software filling is performed, as appropriate, without user specification.
-Version
Print the version number and then exit.
DEVICE SPECIFIC OPTIONS
ictrans accepts an identical set of device-specific options to that of ctrans. For a description of the
device-specific options see ctrans(1NCARG).
COMMANDS
Command Structure
ictrans commands have a simple and regular structure. Commands which operate directly on the metafile
being processed may be preceded by a frame_list which designate the frames to which the command applies.
Some commands accept arguments. Anything following a command name is regarded as an argument:
( frame [ ,frame ])* command ( argument )*
A comma-separated pair of frames implies the inclusive list of frames. If a frame list is omitted and a
command requires a frame then the current frame is used as the default. If no argument list is specified
and one is required then a default argument is used whenever possible.
For example, the command 1,5 8 save /tmp/foo would write the first through fifth and the eighth frame of
the metafile to the file /tmp/foo.
Commands will ignore any unexpected arguments. Command names may be abbreviated up to the point that
they are unique.
Frame Lists
Frames can be addressed in several ways:
nnn By frame number. Frames are assigned a relative number from first to last in the metafile. The
first frame is numbered 1.
$ The last frame in the file.
. The current frame. ictrans keeps track of the last frame upon which an operation was performed.
This frame is called the "current frame".
frame+-n
A frame number followed by a plus sign (+) or a minus sign (-), followed by a decimal number,
specifies the frame plus or minus the indicated number of frames. frame may be omitted in which
case the current frame is assumed. For example, `10+2' addresses frame 12 in the metafile.
Commands
! command
Run command as a shell command on the local machine.
alias [ name [ def ] ]
Assign def to the alias name. If def is omitted, the alias name is displayed along with its
current definition. If both name and def are omitted, all aliases are displayed. def is of the
form:
: [ ctrans_args ] : [ filter_chain ]
where ctrans_args is list of command line arguments for the metafile translator ctrans and
filter_chain is a set of simple commands separated by |. filter_chain may be terminated by > or
>> filename. For example:
ictrans> alias name1 : -d xwd : | cat > outfile
or
ictrans> alias name2 : -d ps.mono : | filter1 | lpr
dup [number]
This command is used to set the number of times each frame is displayed during subsequent
plotting. The default is one. If dup is invoked without any arguments the current value of dup is
returned.
count
Reports number of frames contained in the file.
current
Reports the current frame.
file [ metafile ]
The file metafile will be used for subsequent translation. ictrans uses the shell defined by the
environment variable SHELL (/bin/sh by default) to perform filename substitution on metafile. The
rules governing filename substitution are as defined by the working shell. If no argument is given
the current metafile name is reported.
font [ font ]
Set the fontcap to font for future translation. This function is identical to that of the -font
option. If font is omitted the current fontcap name is reported.
help [ command ]
Print a usage statement for command. If command is omitted a brief description of all commands is
given.
[ frames ] list
Provide brief information about each metafile frame in frames. If frames is omitted then the
current frame is used. If frames is omitted and the current frame is not the last frame then the
current frame is incremented to the next frame in the metafile.
< frame1 > < frame2 > merge
Plot frame number frame1 and then plot frame number frame2 over the first frame without clearing
the device. The result is a "merge" of the two plots. The current frame is not changed. There are
no defaults for frame1 or frame2. The resulting plot might not be what was expected. Attributes
from the first frame, such as color, may override attributes in the second frame.
loop
Toggle loop mode on or off. When loop mode is on subsequent plot commands will cause the requested
frames to be plotted and then ictrans will proceed to either the first frame in the defined
segment or the last and repeatedly display the first through last (last through first) frames.
Looping continues until an interrupt signal is received. The determination of which order to loop,
forwards or backwards, is made as follows: If the last group of frames plotted was in ascending
order loop forward. If the last group of frames plotted was in descending order loop backwards. If
the order cannot be determined don't loop. For example; if loop mode is set "1 3,4 plot" will
result in forward looping, "1 4,3 plot" will result in backward looping, and "3,4 1 plot" will
result in no looping because the last group of frames plotted, "1", is a single frame.
movie [ time ]
Display each frame for time seconds before proceding to the next frame during subsequent plots. If
time is omitted then movie mode is toggled off or on. In the case the movie mode is toggled on the
default time is zero seconds. If movie mode is toggled to off a newline must be received before
advancing to the next frame during plotting.
next
Multiple files may be specified on the ictrans command line. To edit the next file in the argument
list use the next command.
[ frames ] plot
Plot the addressed frames. If frames is omitted then the current frame is plotted and if possible,
the current frame number is incremented. If "movie" mode is set ictrans will wait time seconds
after displaying each plot before continuing. time is set with the movie command. If "movie"
mode is not set ictrans will wait for a newline character before advancing to the next frame.
plot will report the number of frames and the last frame in frames. Plotting will be terminated
and ictrans will reenter command mode after the last frame is plotted or upon receiving a
interrupt signal, SIGINT.
[ frames ] Print
The addressed frames are translated and sent to the current spooling device. Translation is
performed by a spawned translator. The spooler command may be used to select a spooling device.
See ncarv_spool(5NCARG).
quit
Terminate the session.
[ frames ] save [ metafile ]
Save the addressed frames to metafile. If metafile does not exist then it is created. Filename
substitution is performed on metafile. If metafile is omitted than the last file saved to is
used. If frames is omitted than the current frame is used.
[ frames ] Save [ metafile ]
Same as the save command except Save does not confirm its actions with the user in the case that
the file exists. If the file exists but is not a valid NCGM it is overwritten. If the file
exists and is a valid NCGM it is appended to.
skip [ number ]
Set number of frames to skip over during subsequent plotting. For example, if "skip" is set to 1
and a request is made to plot frames 1 through 10 frames 1, 3, 5, 7, and 9 will be displayed. With
no arguments skip reports its current value. The default is zero.
spooler [ spooler_alias ]
With no arguments the current spooler alias name is reported. If spooler_alias is a valid alias
either defined by the alias command, or in a ncarv_spool configuration file, or by the NCARV_SPOOL
environment variable, then spooler alias becomes the current spooler. Subsequent Print commands
will use the spooler definition defined by the current spooler. See ncarv_spool(5NCARG).
[ start frame ] start
This command defines the first frame in a segment of frames. start, together with the stop
command, define the boundaries of a segment of metafile frames. When ictrans is in loop mode the
contents of this segment are repeatedly displayed. The default start frame is the first frame in
the metafile, 1. If no arguments are given start reports the first frame in the current segment.
[ stop frame ] stop
This command defines the last frame in a segment of frames. The default stop frame is the last
frame in the metafile, $. If no arguments are given stop reports the last frame in the current
segment.
zoom [ llx [ lly [ urx [ ury ]]]]
The zoom command allows for specification of a workstation window (in the GKS sense). Four
coordinates are specified which define a rectangular window which is a subset of the normalized
VDC rectangle with corner points (0.0, 0.0) and (1.0, 1,0). The specified window is then mapped
onto the entire viewport. For example
ictrans> zoom 0.0 0.0 0.5 0.5
would result in the lower left quarter of subsequent plots being blown up to fill the entire
display. Specification of such a window may be used for zooming and panning.
The range with which one may zoom in on a plot may be limited by the integer addressing precision
of the device.
EXAMPLES
The following example shows how ictrans might be used in a batch mode to translate a metafile called
gmeta and send the translated results of the entire file to a spooled device called "imagen" which might
be defined in the system ncarv_spool file:
% ictrans -e 'spooler imagen' -e '1,$Print' gmeta
ENVIRONMENT
FONTCAP
Default fontcap specifier.
GRAPHCAP
Default output device specifier.
NCARG_ROOT
Path to root of NCAR Graphics installation.
NCARG_LIB
If set this variable contains the path to the installed NCAR Graphics libraries. NCARG_LIB
overrides NCARG_ROOT.
NCARG_TMP
If set, this environment variable contains a directory path to be used for temporary files. On
most systems the default is /tmp. On some systems the default is /usr/tmp.
TMPDIR If NCARG_TMP is not set this environment variable specifies the directory path for scratch disk
space. If neither NCARG_TMP TMPDIR is set a site-dependent, hard-coded default is used.
FILES
$NCARG_ROOT/lib/ncarg/ncarv_spool
local ictrans spooler config file
~/.ncarv_spool user's ictrans spooler config file
SEE ALSO
ctrans(1NCARG), fcaps(1NCARG), gcaps(1NCARG), idt(1NCARG), med(1NCARG), ncarv_spool(5NCARG)
Hardcopy: NCAR Graphics Fundamentals, UNIX Version
CAVEATS
Metafile frames written to an existing file via the save command will be subject to the effects of any
global "attribute elements" contained within the file.
COPYRIGHT
Copyright (C) 1987-2009
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.