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splines(3u) [debian man page]

splines(3U)						    InterViews Reference Manual 					       splines(3U)

NAME

       OpenBSpline,  S_OpenBSpline,  F_OpenBSpline,  SF_OpenBSpline, SFH_OpenBSpline, ClosedBSpline, S_ClosedBSpline, F_ClosedBSpline, SF_ClosedB-
       Spline, 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_OpenBSpline 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 constructor.

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 subclasses.

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 constructor.

CLOSEDBSPLINE SUBCLASS PUBLIC OPERATIONS

       S_ClosedBSpline(Coord* x, Coord* y, int count, Graphic* = 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 subclasses.

SEE ALSO

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

Unidraw 							  2 February 1991						       splines(3U)

Check Out this Related Man Page

Vertices(3U)						    InterViews Reference Manual 					      Vertices(3U)

NAME

       Vertices - abstract base class for graphics defined by a set of coordinate pairs

SYNOPSIS

       #include <Unidraw/Graphic/verts.h>

DESCRIPTION

       Vertices is an abstract base class for graphics such as polygons and splines whose geometry is specified by a set of coordinate pairs.  The
       Vertices class supports vertex-related operations common to all such graphical objects and also supports extent caching.

PUBLIC OPERATIONS

       virtual ~Vertices()
	      The destructor deallocates the list of coordinate pairs stored in the graphic.

       virtual int GetOriginal(const Coord*& x, const Coord*& y)
	      Return pointers to the arrays of Coords stored internally that define the graphic's vertices.  GetOriginal's return  value  reflects
	      the size of the arrays.

       virtual boolean operator == (Vertices&)
       virtual boolean operator != (Vertices&)
	      Compare this to the given Vertices instance and return whether they (do not) store identical sets of vertices.

PROTECTED OPERATIONS

       Vertices(Graphic* = nil)
       Vertices(Coord* x, Coord* y, int count, Graphic* = nil)
	      The  constructors are protected to disallow instantiation of the abstract class.	Subclasses can pass a set of vertices to copy into
	      internal storage and an optional graphic from which to obtain an initial set of graphics state.  Vertices  itself  stores  no  addi-
	      tional graphics state over that in the Graphic base class.

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

       void f_getExtent(
	   float&, float&, float&, float&, float&, Graphic*
       )
	      Helper  functions  that return extent information based on the bounding box that the vertices define.  s_getExtent returns an extent
	      that accounts for the width of a brush, as would be necessary if the vertices defined a stroked path, while f_getExtent assumes that
	      the  vertices  define the graphic's extremities, as would be the case if the vertices defined a filled path.  These operations cache
	      the extent they compute initially.

SEE ALSO

       Graphic(3U)

Unidraw 							  2 February 1991						      Vertices(3U)
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