-- File:	Polygon2dGen.cdl
-- Created:	Mon Oct 19 11:51:16 1992
-- Author:	Laurent BUCHARD
--		<lbr@sdsun2>
---Copyright:	 Matra Datavision 1992


generic class Polygon2dGen from IntCurve ( 
    TheCurve         as any;
    TheCurveTool     as any) -- as CurveTool from IntCurve(TheCurve)

	---Purpose: Describe a polyline  as  a topology to compute the
	--          interference beetween two polylines 2 dimension.
	          

        ---Level: Internal

uses    Pnt2d              from gp,
    	Box2d              from Bnd,
    	Array1OfPnt2d      from TColgp,
	Array1OfReal       from TColStd,
	Array1OfInteger    from TColStd,
	Domain             from IntRes2d


raises  OutOfRange from Standard


is  

    Create         (Curve       : TheCurve;
    	    	    NbPnt       : Integer  from Standard;
		    Domain      : Domain   from IntRes2d;
    	    	    Tol         : Real     from Standard) 
		    
		    ---Purpose: Compute a polygon on the domain of the curve.
		    
		    
    	    	    returns Polygon2dGen from IntCurve;

    Create         (Curve       : TheCurve;
    	    	    NbPnt       : Integer  from Standard;
		    Domain      : Domain   from IntRes2d;
    	    	    Tol         : Real     from Standard;
		    OtherBox    : Box2d    from Bnd)
		    
		    ---Purpose: Compute a polygon on the domain of the
		    --          curve.   parameters of  the  begin and
		    --          end of the curve (and its polygon) are
		    --          adjusted to lie in the OtherBox.
		    
    	    	    returns Polygon2dGen from IntCurve;


    ComputeWithBox(me       : in out; 
                   Curve    : TheCurve;
		   OtherBox : Box2d  from Bnd)
		   
		   ---Purpose: The current polygon is modified if most
		   --          of the  points of the  polygon  are are
		   --          outside  the  box  <OtherBox>.  In this
		   --          situation, bounds are computed to build
		   --          a polygon inside or near the OtherBox.
                   is static;

    Bounding       (me)
    	    	    returns Box2d from Bnd
    	    	    is static;
    ---C++: return const &
    ---C++: inline
    ---Purpose: Give the bounding box of the polygon.

    DeflectionOverEstimation(me)
		   returns Real from Standard
		   ---C++: inline
		   is static;

    SetDeflectionOverEstimation(me: in out; x:Real from Standard)
                    ---C++: inline
		    is static;

    Closed         (me : in out; clos : Boolean from Standard)
    	            ---C++: inline
		    is static;

    Closed         (me)
    	    	    returns Boolean from Standard
    	            ---C++: inline		    
		    is static;

    NbSegments     (me)
    	    	    returns Integer
		    ---C++: inline
    	    	    is static;
    ---Purpose: Give the number of Segments in the polyline.
    
    BeginOfSeg     (me;
    	    	    Index : in Integer)
    	    	    returns Pnt2d from gp
    	    	    raises OutOfRange from Standard
    	    	    is static;
    ---Purpose: Give the point of range Index in the Polygon. 
    ---C++: inline
    ---C++: return const &

    EndOfSeg       (me;
    	    	    Index : in Integer)
    	    	    returns Pnt2d from gp
    	    	    raises OutOfRange from Standard
    	    	    is static;
    ---Purpose: Give the point of range Index in the Polygon. 
    ---C++: inline
    ---C++: return const &

-- Implementation : 


   InfParameter(me) 
   
    	---Purpose: Returns the parameter (On the curve)
    	--          of the first point of the Polygon
   
    	returns Real from Standard
	---C++: inline
	is static;

   SupParameter(me) 

       	---Purpose: Returns the parameter (On the curve)
    	--          of the last point of the Polygon
   
    	returns Real from Standard
	---C++: inline
	is static;


   AutoIntersectionIsPossible(me) 
       returns Boolean from Standard
       is static;

   ApproxParamOnCurve(me; 
                      Index       : in  Integer from Standard;
		      ParamOnLine : in  Real    from Standard)
    	    	      
                      returns Real      from Standard
    	    	     
		      raises OutOfRange from Standard
    	    	      is static;

            ---Purpose: Give an approximation of the parameter on the curve 
            --          according to the discretization of the Curve.

     
    CalculRegion  (me; 
    	    	   x  :  Real  from  Standard  ; 
		   y  :  Real  from  Standard  ;
    	    	   x1 :  Real  from  Standard  ; 
    	    	   x2 :  Real  from  Standard  ; 
		   y1 :  Real  from  Standard  ;
		   y2 :  Real  from  Standard  ) 
	returns  Integer  from  Standard  ;	   
	---C++: inline
		 	
    Dump           (me)
    	is static;


fields  TheBnd        : Box2d                from Bnd;
    	TheDeflection : Real                 from Standard;
    	NbPntIn       : Integer              from Standard;
	TheMaxNbPoints: Integer              from Standard;
    	ThePnts       : Array1OfPnt2d        from TColgp;
	TheParams     : Array1OfReal         from TColStd;
	TheIndex      : Array1OfInteger      from TColStd;
	ClosedPolygon : Boolean              from Standard;
	
	--- To compute an approximate parameter on the Curve
	--  
	Binf          : Real                 from Standard;
	Bsup          : Real                 from Standard;
	

end Polygon2dGen;