Caveats
 -------

  ASpringies'  way of double buffering the animation screen isn't 100%
system compliant(*).  It works  on any Amiga with the  OLD, ECS or AGA
chipset, but owners of additional graphics hardware should be careful.

  Set  your graphics board  to the most compatible intuition emulation
or switch it to bypass mode.

  I  am  very sorry for this, but I couldn't yet find  out  any system
compliant method of double buffering  for Kickstart  version 2.x which
lets  me use (clipping) layers on both  displays,  except  for  simple
screen or  window switching, which is unacceptable.  Please contact me
if you know a better method (see  Author).

  ASpringies suffers from the same numerical problems  that xspringies
had,  some objects  tend  to "blow  up"  when the  time  step  or  the
viscosity  is  set too  high.  Please  see  Global Settings for details.

  When an object is blown up,  the current state is lost  and you will
have  to reset  ASpringies, so  do a snapshot  frequently when you are
editing a system.


----------------

  (*)  ASpringies opens a standard screen with a  borderless  backdrop
window on it, allocates a second bitmap and raster  memory of the same
size, and finally creates a BehindLayer  which is linked to the custom
bitmap.   To switch the displays ASpringies sets  the screens RastPort
to either that of the backdrop window or the custom RastPort, which is
contained  in  the  BehindLayer  structure.  This  is  followed  by  a
MakeScreen() and  ReThinkDisplay() system call, which also  cares  for
synchronity  with  the  monitor's  vertical  blank  period.   However,
Commodore discourages the use of custom layers with intuition screens,
this may lead to problems with some grapics boards.