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       intermomentary - Visualize the momentary and aggregate intersections between slowly moving


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


       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. Display:

           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

       -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 property.


       Setting the background to anything besides black confuses the intensity
               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