Rect, S_Rect, F_Rect, SF_Rect, Polygon, S_Polygon, F_Poly-
       gon, SF_Polygon - structured graphics classes for  rectan-
       gles and polygons

SYNOPSIS

       #include <Unidraw/Graphic/polygons.h>

DESCRIPTION

       Rect  and Polygon serve as abstract base classes for rect-
       angle and polygon structured graphics.  They  are  derived
       from  Graphic and Vertices, respectively.  Predefined sub-
       classes include S_Rect, F_Rect, and  SF_Rect,  which  draw
       stroked,  filled,  and  stroked-filled rectangles, respec-
       tively; and S_Polygon, F_Polygon,  and  SF_Polygon,  which
       draw stroked, filled, and stroked-filled polygons, respec-
       tively.  The  stroked  subclasses  store  a  PSBrush,  the
       filled  subclasses  store  a  PSPattern,  and the stroked-
       filled subclasses store one of each.

RECT PUBLIC OPERATIONS

       void GetOriginal(Coord& x0, Coord& y0, Coord& x1, Coord&
              y1)
              Return  the  rectangle's  geometry, as specified in
              the constructor.  (x0, y0) defines  one  corner  of
              the  rectangle, while (x1, y1) defines the opposing
              corner.

RECT PROTECTED OPERATIONS

       Rectangle(Coord x0, Coord y0, Coord x1, Coord y1, Graphic*
              = nil)
              The constructor is protected to disallow instantia-
              tion  of  the  abstract  base class.  A rectangle's
              geometry is defined by two points, corresponding to
              opposing corners of the rectangle.  The constructor
              also takes an optional graphic from which to obtain
              an initial set of graphics state.

       void s_getExtent(
           float&, float&, float&, float&, float&, Graphic*
       )

       void f_getExtent(
           float&, float&, float&, float&, float&, Graphic*
       )

       boolean s_contains(PointObj&, Graphic*)
       boolean f_contains(PointObj&, Graphic*)
       boolean s_intersects(BoxObj&, Graphic*)
       boolean f_intersects(BoxObj&, Graphic*)
              Helper  functions that return extent and hit detec-
              tion information based on the bounding box that the
              rectangle  defines.   s_getExtent,  s_contains, and
              rectangle is  stroked,  while  f_getExtent,  f_con-
              tains,  and f_intersects assumes that the rectangle
              is filled.  Subclasses can use  the  operations  to
              help   implement  their  getExtent,  contains,  and
              intersects operations.

RECT SUBCLASS PUBLIC OPERATIONS

       S_Rect(Coord x0, Coord y0, Coord x1, Coord y1, Graphic* =
              nil)
       F_Rect(Coord x0, Coord y0, Coord x1, Coord y1, Graphic* =
              nil)
       SF_Rect(Coord x0, Coord y0, Coord x1, Coord y1, Graphic* =
              nil)
              Constructors  for  the various predefined Rect sub-
              classes.

POLYGON PROTECTED OPERATIONS

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

POLYGON SUBCLASS PUBLIC OPERATIONS

       S_Polygon(Coord* x, Coord* y, int count, Graphic* = nil)
       F_Polygon(Coord* x, Coord* y, int count, Graphic* = nil)
       SF_Polygon(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)