c
c implementation of fortran version.
c -------------  -- ------- -------
c
c    $lc$    -  largest coordinate.  x and y point coordinates are kept
c               in the area map as integers in the range from 0 to $lc$.
c               the value of $lc$ obviously must not be larger than the
c               largest integer on the target machine; it must also not
c               be larger than the largest exactly-representable real
c               on the target machine and its square must not be larger
c               than the largest exactly-representable real or double
c               (depending on what you use to replace $rd$, below) on
c               the target machine.  on a cray, one may use 1000000.
c
	real      lc
	parameter (lc=1000.)
c
c    $pi$    -  the value pi (3.14159265358979323846264338328...).
	real      pi
	parameter (pi=3.141593)
c
c    $tp$    -  the value two pi (6.28318530717958647692528676656...).
	real      tp
	parameter (tp=6.283185)
c
c    $0.$    -  the value zero (0. or 0.d0).
	real      zero
	parameter (zero=0.)
c
c    $.1$    -  the value one tenth (.1 or .1d0).
	real      tenth
	parameter (tenth=.1)
c
c    $.5$    -  the value one half (.5 or .5d0).
	real      half
	parameter (half=.5)
c      
c    $1.$    -  the value one (1. or 1.d0).
	real      one
	parameter (one=1.)
c
c    $ba$    -  the value ten to the tenth (1.e10 or 1.d10).
	real      tenten
	parameter (tenten=1.e10)
c
