-- File:	ExtPSOfRev.cdl
-- Created:	Wed Oct  9 10:48:48 1991
-- Author:	Michel CHAUVAT
--		<mca@topsn3>
---Copyright:	 Matra Datavision 1991


generic class   ExtPSOfRev from Extrema (SurfaceOfRevolution as any;
    	    	    	    	    	 Tool                as any ; -- as ToolSurfaceOfRevolution(SurfaceOfRevolution)
					 Curve               as any;
					 ToolCurve           as any; -- as ToolCurve(Curve)
					 TheExtPC            as any
					)
    	---Purpose: It calculates all the extremum distances
    	--          between a point and a surface.
    	--          These distances can be minimum or maximum.

uses   	POnSurf           from Extrema,
    	SequenceOfPOnSurf from Extrema,
    	Pnt               from gp,
    	SequenceOfReal    from TColStd
	
raises  NotDone    from StdFail,
    	OutOfRange from Standard

is
    Create (P: Pnt; S: SurfaceOfRevolution; Tol: Real; NbV: Integer;
    	    TolV: Real) returns ExtPSOfRev;
      	---Purpose: It calculates all the distances between a point 
      	--          and a surface of revolution.
      	--          Tol is used to test if the point is on the axis.
      	--          NbV and TolV are used to compute the extrema on a 
      	--          meridian (see ExtPC.cdl).

    IsDone (me) returns Boolean
    	---Purpose: Returns True if the distances are found.
    	is static;
    
    NbExt (me) returns Integer
    	---Purpose: Returns the number of extremum distances.
    	raises  NotDone from StdFail
	    	-- if IsDone(me)=False.
    	is static;

    SquareDistance (me; N: Integer) returns Real
    	---Purpose: Returns the value of the Nth resulting square distance.
    	raises  NotDone from StdFail,
    	    	-- if IsDone(me)=False.
    	        OutOfRange
		-- if N < 1 or N > NbPoints(me).
    	is static;

    Point (me; N: Integer) returns POnSurf
    	---Purpose: Returns the point of the Nth resulting distance.
    	raises  NotDone from StdFail,
    	    	-- if IsDone(me)=False.
    	        OutOfRange
		-- if N < 1 or N > NbPoints(me).
    	is static;

fields
    myDone : Boolean;
    mySqDist: SequenceOfReal from TColStd;
    myPoint: SequenceOfPOnSurf from Extrema;

end ExtPSOfRev;