Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
FBPOINT(1)			    BRL-CAD			    FBPOINT(1)

NAME
       fbpoint - point at and identify screen coordinates

SYNOPSIS
       fbpoint [-h] [-x	[prefix]] [-y [prefix]]	[initx inity]

DESCRIPTION
       Fbpoint allows you to move a non-destructive cursor around on the
       display.	As the cursor is moved around, fbpoint writes the coordinates
       of the pixel pointed at by the cursor, and the red, green, and blue
       values of that pixel, on	standard error fbpoint also writes the last
       set of coordinates pointed to on	standard out on	exit. The starting
       position	is center-screen unless	an optional initx inity	is given.

       The ``h'', ``j'', ``k'',	and ``l'', commands step the cursor one	pixel
       left, down, up, or right	respectively, and the ``H'', ``J'', ``K'', and
       ``L'', commands step the	cursor in the corresponding direction in big
       increments. The ``B'', ``N'', ``P''. and	``L'', and ``^B'',
       (control-B), ``^N'', ``^P'', and	``^F'',	are also little	and big
       (respectively) cursor movement commands.

       A ``?'' prints a	short command summary, and typing ``q'', or ``Q'',
       exits the program.

       The -h flag causes the frame buffer to be used in high resolution mode
       (1024x1024). This is important for frame	buffers	such as	the Adage
       which operate differently depending on the display size.	Without	this
       flag the	default	size for the selected device will be used (usually the
       entire screen).

       Using this program with grave accents in	a shell	script in order	to
       interactively grab a pair of coordinates	is one of its main intentions.
       This is the reason for the feedback on standard error and the final
       coordinate pair on standard out.	By default, both the x and y
       coordinates are written.	If the -x or -y	flags are given	only those
       coordinates will	be written. In these cases an optional prefix can
       follow the flag which will be appended to the output coordinate.	This
       is to facilitate	passing	the output of this program as arguments	to
       another.

EXAMPLE
       fbpoint by itself is used to pick coordinates or	pixel values from a
       display.

       fbscanplot `fbpoint -y` allows you to choose the	scanline to plot using
       fbpoint.

       pix-fb `fbpoint -x-X -y-Y` file.pix will	allow you to select an x, y
       screen coordinate and then place	the lower left corner of the image
       file.pix	at that	location.

SEE ALSO
       brlcad(1), fbgrid(1), fbzoom(1)

AUTHOR
       BRL-CAD Team

COPYRIGHT
       This software is	Copyright (c) 1986-2013	by the United States
       Government as represented by U.S. Army Research Laboratory.

BUG REPORTS
       Reports of bugs or problems should be submitted via electronic mail to
       <devs@brlcad.org>.

BRL-CAD				  07/08/2017			    FBPOINT(1)

NAME | SYNOPSIS | DESCRIPTION | EXAMPLE | SEE ALSO | AUTHOR | COPYRIGHT | BUG REPORTS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=fbpoint&sektion=1&manpath=FreeBSD+12.0-RELEASE+and+Ports>

home | help