-- File:	PBRep.cdl
-- Created:	Fri Jul 16 11:09:46 1993
-- Author:	Remi LEQUETTE
--		<rle@nonox>
-- Update:      Frederic MAUPAS
--              <fma@pronox>          	 
---Copyright:	 Matra Datavision 1993


package PBRep 

	---Purpose: This  package    describes  a persistent  Boundary
	--          Representation  Data Structure inherited from  the
	--          abstract Topology  defined in the PTopoDS package.
	--          The  geometric data  are provided by the PGeom and
	--          PGeom2d packages.

uses
    gp,          -- Elementary geometry
    PTopLoc,     -- Local coordinate systems
    TopAbs,      -- Enumerations : Orientation, ShapeType
    PTopoDS,     -- Abstract topological data structure
    GeomAbs,     -- Enumerations : Shape
    PGeom,       -- 3D geometry : curves and surfaces
    PGeom2d,     -- 2D geometry : curves in parametric space
    PPoly,       -- Persistent Triangulations and Polygons
    PColStd      -- Persistent Standard Collection 
    
is

    deferred class CurveRepresentation;
	---Purpose: Root for curve representations.

    deferred class GCurve;
	---Purpose: Root class  for geometric curves  representations.
	--          Contains a first an a last parameter.
 
    class Curve3D;
	---Purpose: Representation by a 3d curve.
    
    class CurveOnSurface;
	---Purpose: Representation by a curve in the  parametric space
	--          of a surface.

    class CurveOnClosedSurface;
	---Purpose: Representation  by two   curves in the  parametric
	--          space of a surface.

    class Polygon3D;
	---Purpose: Representation by a 3D polygon.

    class PolygonOnTriangulation;
	---Purpose: Representation by    an array  of  indices  on   a
	--          triangulation.
	
    class PolygonOnClosedTriangulation;
	---Purpose: Representation   by two  arrays  of indices   on a
	--          triangulation.
	
    class PolygonOnSurface;
	---Purpose: Representation by 2d polygon in the parametric space
	--          of a surface.

    class PolygonOnClosedSurface;
	---Purpose: Representation by two 2d polygons in the parametric
	--          space of the  surface.
	
    class CurveOn2Surfaces;
	---Purpose: Geometric continuity bewtween two surfaces.
	
    deferred class PointRepresentation;
	---Purpose: Root for point representations.
  
    class PointOnCurve;
	---Purpose: Representation by a parameter on a 3D curve.
	
    deferred class PointsOnSurface;
	---Purpose: Root for points on surface.
    
    class PointOnCurveOnSurface;
	---Purpose: Representation by   a parameter on  a curve   on a
	--          surface. 

    class PointOnSurface;
	---Purpose: Representation by two parameters on a surface.

    class TFace;
	---Purpose: The TFace class  is inherited from  the TFace from
	--          TopoDS.
	
    class TEdge;
	---Purpose: The TEdge  class is  inherited from the TEdge from
	--          TopoDS.

    class TVertex;
	---Purpose: The TVertex  class  is  inherited from the TVertex
	--          from TopoDS.

    class TFace1;
	---Purpose: The TFace class  is inherited from  the TFace from
	--          TopoDS.
	
    class TEdge1;
	---Purpose: The TEdge  class is  inherited from the TEdge from
	--          TopoDS.

    class TVertex1;
	---Purpose: The TVertex  class  is  inherited from the TVertex
	--          from TopoDS.

end PBRep;