XScreenSaver(1)

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]  [-subtrac-
       tive] [-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
       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 seg-
               ment.  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 spec-
               ifies 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-ran-
               domly.  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 appropri-
               ate  color,  instead  of the qix simply being com-
               posed  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
               only works on PseudoColor  displays.   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 addi-
               tive  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 sub-
               tractive  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_MAN-
               AGER property.

SEE ALSO
       X(1) xscreensaver(1) 

COPYRIGHT
       Copyright (C) 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 lt;jwz@netscape.com, 13-aug-92.

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