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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]

DESCRIPTION
     The qix program bounces a series of line segments around its
     window.   This  is truly the swiss army chainsaw of qix pro-
     grams.  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  seg-
             ments  will cycle through the spectrum.  This speci-
             fies 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 25000, or about
             0.025 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 conjuction 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.

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 O 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  permis-
     sion   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.

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