-- File:	BRepLib_MakePolygon.cdl
-- Created:	Thu Jul 29 11:39:48 1993
-- Author:	Remi LEQUETTE
--		<rle@phylox>
---Copyright:	 Matra Datavision 1993


class MakePolygon from BRepLib  inherits MakeShape from BRepLib 

	---Purpose: Class to build polygonal wires.
	--          
	--          A polygonal wire may be build from
	--          
	--          - 2,4,3 points.
	--          
	--          - 2,3,4 vertices.
	--          
	--          - any number of points.
	--          
	--          - any number of vertices.
	--          
	--          
	--          When a point or vertex is added to the  polygon if
	--          it is identic  to the previous  point no  edge  is
	--          built. The method added can be used to test it.

uses
    Wire   from TopoDS,
    Edge   from TopoDS,
    Vertex from TopoDS,
    Pnt    from gp

raises
    NotDone           from StdFail

is
    Create 
    returns MakePolygon from BRepLib;
	---Purpose: Creates an empty MakePolygon.
	---Level: Public
	
    Create(P1, P2 : Pnt from gp)
	---Level: Public
    returns MakePolygon from BRepLib;

    Create(P1, P2, P3 : Pnt from gp; 
           Close : Boolean = Standard_False)
	---Level: Public
    returns MakePolygon from BRepLib;

    Create(P1, P2, P3, P4 : Pnt from gp; 
           Close : Boolean = Standard_False)
	---Level: Public
    returns MakePolygon from BRepLib;

    Create(V1, V2 : Vertex from TopoDS)
	---Level: Public
    returns MakePolygon from BRepLib;

    Create(V1, V2, V3 : Vertex from TopoDS; 
    	   Close : Boolean = Standard_False)
	---Level: Public
    returns MakePolygon from BRepLib;

    Create(V1, V2, V3, V4 : Vertex from TopoDS; 
           Close : Boolean = Standard_False)
	---Level: Public
    returns MakePolygon from BRepLib;


    Add(me : in out; P : Pnt from gp)
	---Level: Public
    is static;

    Add(me : in out; V : Vertex from TopoDS)
	---Level: Public
    is static;
    
    Added(me) returns Boolean
	---Purpose: Returns  True if  the last   vertex  or point  was
	--          succesfully added.
	---Level: Public
    is static;
    
    Close(me : in out)
	---Level: Public
    is static;
    
    FirstVertex(me) returns Vertex from TopoDS
	---C++: return const &
	---Level: Public
    is static;

    LastVertex(me) returns Vertex from TopoDS
	---C++: return const &
	---Level: Public
    is static;
    
    Edge(me) returns Edge from TopoDS
	---Purpose: Returns the last edge added to the polygon.
	--          
	---C++: return const &
	---C++: alias "Standard_EXPORT operator TopoDS_Edge() const;"
	---Level: Public
    raises
    	NotDone from StdFail
    is static;

    Wire(me) returns Wire from TopoDS
	---C++: return const &
	---C++: alias "Standard_EXPORT operator TopoDS_Wire() const;"
	---Level: Public
    raises
    	NotDone from StdFail
    is static;

fields

    myFirstVertex : Vertex from TopoDS;
    myLastVertex  : Vertex from TopoDS;
    myEdge        : Edge from TopoDS;

end MakePolygon;