NAME

       qix - bounce colored lines around a window

SYNOPSIS

       qix  [-display  host:display.screen]  [-foreground  color]  [-background  color] [-window]
       [-root] [-mono] [-install]  [-visual  visual]  [-segments  int]  [-spread  pixels]  [-size
       pixels]  [-count  int]  [-color-shift degrees] [-delay usecs] [-random] [-linear] [-solid]
       [-hollow] [-xor] [-no-xor] [-transparent]  [-non-transparent]  [-additive]  [-subtractive]
       [-poly int] [-gravity] [-no-gravity] [-fps]

DESCRIPTION

       The  qix  program  bounces a series of line segments around its window.  This is truly the
       swiss army chainsaw of qix programs.  If you know of one with more display modes,  I  want
       to know about it.

OPTIONS

       qix accepts the following options:

       -window Draw on a newly-created window.  This is the default.

       -root   Draw on the root window.

       -mono   If on a color display, pretend we're on a monochrome display.

       -install
               Install a private colormap for the window.

       -visual visual
               Specify  which visual to use.  Legal values are the name of a visual class, or the
               id number (decimal or hex) of a specific visual.

       -segments integer
               How many line segments should be drawn.  Default 50.

       -spread integer
               How far apart the endpoints of one segment should be from the next.  Default 8.

       -size integer
               The maximum distance one endpoint of a segment is allowed to be from the  opposite
               end of that segment.  Default 0, meaning unlimited.

       -count integer
               How many qixes to draw.  Default 1.

       -color-shift degrees
               If  on  a  color  display,  the  color of the line segments will cycle through the
               spectrum.  This specifies how far the hue of each segment should be from the next,
               in degrees on the HSV wheel.  Default 3.

       -delay microseconds
               How  much of a delay should be introduced between steps of the animation.  Default
               10000, or about 0.01 seconds.

       -random The qix will wander around the screen semi-randomly.  This is the default.

       -linear The opposite of -random: the qix will travel in straight lines until it reaches  a
               wall, and then it will bounce.

       -solid  If  this  is  specified, then the area between the line segments will be filled in
               with the appropriate color, instead of the qix simply being composed of one-pixel-
               wide line segments.  This option looks really good in color.

       -hollow The opposite of -solid; this is the default.

       -xor    If this is specified, then qix segments will be drawn and erased with xor, instead
               of being drawn in some color and erased in the  background  color.   This  implies
               -mono, in that only two colors can be used.

       -transparent
               If this is specified, and -count is greater than 1, then each qix will be drawn in
               one color, and when they overlap, the colors will be mixed.  This  looks  best  in
               conjunction with -solid.

       -non-transparent
               Turns off -transparent.

       -additive
               If -transparent is specified, then this option means that the colors will be mixed
               using an additive color model, as if the qixes were projected light.  This is  the
               default.

       -subtractive
               If -transparent is specified, then this option means that the colors will be mixed
               using a subtractive color model, as if the qixes were translucent filters.

       -poly int
               How many vertices each qix-line  should  have:  the  default  is  2,  meaning  the
               traditional qix line shape.  Three will yield triangles, and so on.

       -gravity

       -no-gravity
               Whether  there  should  be downward attraction.  For example, the options -gravity
               -linear will make everything move in nice smooth parabolas.   Gravity  is  off  by
               default.

       -fps    Display the current frame rate and CPU load.

ENVIRONMENT

       DISPLAY to get the default host and display number.

       XENVIRONMENT
               to  get  the name of a resource file that overrides the global resources stored in
               the RESOURCE_MANAGER property.

SEE ALSO

       X(1), xscreensaver(1)

COPYRIGHT

       Copyright © 1992 by Jamie Zawinski.  Permission to use, copy, modify, distribute, and sell
       this  software  and  its  documentation  for  any  purpose  is hereby granted without fee,
       provided that the above copyright notice appear in all copies and that both that copyright
       notice  and this permission notice appear in supporting documentation.  No representations
       are made about the suitability of this software for any purpose.  It is provided  "as  is"
       without express or implied warranty.

AUTHOR

       Jamie Zawinski <jwz@jwz.org>, 13-aug-92.

       Thanks to Ariel Scolnicov for the -poly and -gravity options.