OpenBSpline, S_OpenBSpline, F_OpenBSpline, SF_OpenBSpline,
       SFH_OpenBSpline,      ClosedBSpline,      S_ClosedBSpline,
       F_ClosedBSpline,   SF_ClosedBSpline,  SFH_ClosedBSpline  -
       structured graphics classes for open and closed B-splines

SYNOPSIS

       #include <Unidraw/Graphic/splines.h>

DESCRIPTION

       OpenBSpline and ClosedBSpline are Vertices subclasses that
       serve  as  abstract  base  classes  for open and closed B-
       spline structured graphics.  Predefined subclasses include
       S_OpenBSpline,  F_OpenBSpline,  and  SF_OpenBSpline, which
       draw stroked, filled, and stroked-filled  open  B-splines,
       respectively;  and  S_ClosedBSpline,  F_ClosedBSpline, and
       SF_ClosedBSpline, which draw stroked, filled, and stroked-
       filled  closed  B-splines,  respectively.   The SFH_OpenB-
       Spline and SFH_ClosedBSpline subclasses are  identical  to
       their  SF_-prefixed  counterparts,  except they can detect
       hits on their control points in addition to detecting hits
       on  their  visible  parts.  The stroked subclasses store a
       PSBrush, the filled subclasses store a PSPattern, and  the
       stroked-filled subclasses store one of each.

OPENBSPLINE PROTECTED OPERATIONS

       OpenBSpline(Coord* x, Coord* y, int count, Graphic* = nil)
              OpenBSpline's constructor is protected  to  prevent
              instantiation  of  the  abstract  base  class.  The
              parameters are passed directly to the Vertices con-
              structor.

OPENBSPLINE SUBCLASS PUBLIC OPERATIONS

       S_OpenBSpline(Coord* x, Coord* y, int count, Graphic* =
              nil)
       F_OpenBSpline(Coord* x, Coord* y, int count, Graphic* =
              nil)
       SF_OpenBSpline(Coord* x, Coord* y, int count, Graphic* =
              nil)
       SFH_OpenBSpline(Coord* x, Coord* y, int count, Graphic* =
              nil)
              Constructors  for  the various predefined Rect sub-
              classes.

CLOSEDBSPLINE PROTECTED OPERATIONS

       ClosedBSpline(Coord* x, Coord* y, int count, Graphic* =
              nil)
              ClosedBSpline's constructor is protected to prevent
              instantiation of  the  abstract  base  class.   The
              parameters are passed directly to the Vertices con-
              structor.

CLOSEDBSPLINE SUBCLASS PUBLIC OPERATIONS

              nil)
       F_ClosedBSpline(Coord* x, Coord* y, int count, Graphic* =
              nil)
       SF_ClosedBSpline(Coord* x, Coord* y, int count, Graphic* =
              nil)
       SFH_ClosedBSpline(Coord* x, Coord* y, int count, Graphic*
              = nil)
              Constructors for the various predefined  Rect  sub-
              classes.

SEE ALSO

       Graphic(3U), Vertices(3U), geomobjs(3U), pspaint(3U)