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Top Forums UNIX for Dummies Questions & Answers Regular expression on hex color codes Post 302361472 by figaro on Tuesday 13th of October 2009 09:28:08 AM
Old 10-13-2009
I have looked into the tr function indeed, but thought that sed could do the same thing in this case. I just have a general concern about the use of regular expressions in the tr function, since "Most of the special RE codes do not apply in the tr function. ", so recognising hex color codes could be an issue.

UPDATE: Unless of course you mean that I first need to extract the hex color code, then pipe (|) it through to the tr function?
 
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OGLC 
Screensaver(1) General Commands Manual OGLC Screensaver(1) NAME
hufo_smoke - particle smoke effect. SYNOPSIS
hufo_smoke [--root/-r] [--maxfps/-x number] [--vsync/-y number] [--dpms/-M number] [--foreground/-f number] [--background/-b number] DESCRIPTION
From Jeremie Allard (http://hufo.planet-d.net/codefr_us.php): "This little smoke effect is coded with a little particle system done for 'The OpenGL Challenge'." Ported to Linux by Tugrul Galatali. OPTIONS
--root Draw on the root window. --maxfps number Set maximum frame rate. --vsync number Limit redraws to specified number of vertical refreshes. 0 - 100. Default: 1 --dpms number Stop rendering new frames if the display is not on. 0 - 1. Default: 1 --foreground number Set primary (dense smoke) color using hex color codes. Default: ffffff --background number Set secondary (light smoke) color using hex color codes. Default: ffffff ENVIRONMENT
DISPLAY to get the default host and display number. SEE ALSO
X(1), COPYRIGHT
Copyright (C) 2000 by Jeremie Allard and Tugrul Galatali. hufo_smoke is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as pub- lished by the Free Software Foundation. hufo_smoke is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABIL- ITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. AUTHOR
Jeremie Allard (Hufo / N.A.A.) <hufo@planet-d.net> and Tugrul Galatali <tugrul@galatali.com> X Version 11 OGLC Screensaver(1)

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