Provided by: xscreensaver-data-extra_5.15-2ubuntu1_i386 bug


       intermomentary  -  Visualize  the momentary and aggregate intersections
       between slowly moving circles.


       intermomentary  [-display  host:display.screen]   [-foreground   color]
       [-background  color]  [-num-discs  disc  count]  [-draw-delay  delayms]
       [-max-riders maxr] [-max-radius maxradius] [-fps]


       The  Intersection  Momentary  is  a  fun  visualization  defining   the
       relationships between objects with Casey Reas, William Ngan, and Robert
       Hodgin. Commissioned for display at the Whitney Museum of American Art.

       A surface filled with 100 medium to small sized  circles.  Each  circle
       has  a  different  size and direction, but moves at the same slow rate.

           A. The instantaneous intersections of the circles.
           B. The aggregate intersections of the circles.

       The circles begin with a radius of 1 pixel and slowly increase to  some
       arbitrary  size.   Circles are drawn with small moving points along the
       perimeter. The intersections are rendered  as  glowing  orbs.   Glowing
       orbs   are  rendered  only  when  a  perimeter  point  moves  past  the
       intersection point.

       Ported  to  XScreensaver  from  the  art  project  "InterMomentary"  at by J.Tarbell


       intermomentary accepts the following options:

       -num-discs disc count (Default: 85)
               Number  of  slowly  moving  and growing discs to use.  The more
               discs, the more CPU power.

       -draw-delay delayms (Default: 30000)
               Delay in ms between drawing cycles.  More  delay,  slower  (but
               smoother and less CPU intensive.)  art.

       -max-riders maxrider (Default: 40)
               Maximum  number of 'riders', single dots moving around the edge
               of the discs.

       -max-radius maxradius (Default: 100)
               Maximum possible radius of a disc.

       -fps    Display the current frame rate and CPU load.


       DISPLAY to get the default host and display number.

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


       Setting the background to anything besides  black  confuses  the
               algorithm and will look terrible.


       X(1), xscreensaver(1)


       Copyright  ©  2003  by J. Tarbell (,

       Ported    to    XScreensaver    2004     by     Mike     Kershaw


       J. Tarbell <>, Jun-03

       Mike Kershaw <>, Oct-04