-- File:	Geom_OsculatingSurface.cdl
-- Created:	Tue May  5 09:20:47 1998
-- Author:	Stepan MISHIN
--		<smn@sgi30>
---Copyright:	 Matra Datavision 1998


private class OsculatingSurface from Geom 

	---Purpose: 

uses                   Surface from Geom,
                SequenceOfReal from TColStd,
      SequenceOfBSplineSurface from Geom,
     HSequenceOfBSplineSurface from Geom,
               Array1OfBoolean from TColStd,
	               IsoType from GeomAbs,
                BSplineSurface from Geom,
            HSequenceOfInteger from TColStd


is
    Create  returns OsculatingSurface from Geom;
    
    Create (BS : Surface from Geom;  Tol:  Real  from  Standard) 
      returns OsculatingSurface from Geom; 
    --- Purpose : detects if the  surface has punctual U  or  V 
    --  isoparametric  curve along on  the bounds of the surface
    --  relativly to the tolerance Tol and Builds the corresponding 
    --  osculating surfaces.
     
      
    Init(me: in out; BS : Surface from Geom;  Tol:  Real  from  Standard) 
      is static;
    

    
    BasisSurface (me) returns Surface from Geom
      is static; 
       
    Tolerance  (me)  returns  Real  from  Standard
    is  static;
    
    UOscSurf (me ; U,V : Real ; t : out Boolean from Standard; 
                                          L : out BSplineSurface from Geom)  
      ---Purpose: if Standard_True, L is the local osculating surface  
      --          along U at the point U,V. 
      returns Boolean from Standard
      is static;
     
      
    VOscSurf (me ; U,V : Real ; t : out Boolean from Standard; 
                                          L : out BSplineSurface from Geom)  
        ---Purpose: if Standard_True, L is the local osculating surface  
        --          along V at the point U,V.
      returns Boolean from Standard
      is static;
     
    BuildOsculatingSurface (me ; Param : Real;  
                                 UKnot,VKnot : Integer;
                                 BS : BSplineSurface from Geom ;
                                 L : out mutable  BSplineSurface from Geom) 
    	---Purpose: returns False if the osculating surface can't be built
    	--          
      returns Boolean  from  Standard
      is private;
      
    IsQPunctual(me ; S : Surface from Geom; 
                    Param : Real from Standard;  
                    IT : IsoType from GeomAbs; 
                    TolMin,TolMax:  Real  from  Standard) 
        ---Purpose: returns    True    if  the    isoparametric     is
        --          quasi-punctual  
    returns Boolean from Standard
    is private;
      
    HasOscSurf   (me) returns Boolean from Standard
      is private;
 
    IsAlongU (me) returns Boolean from Standard  is  private; 
    
    IsAlongV (me) returns Boolean from Standard  is  private;

    
    ClearOsculFlags (me: in out)
      is private ;
    
    GetSeqOfL1 (me) returns SequenceOfBSplineSurface from Geom
      is private;
      ---C++: return const&
     
    GetSeqOfL2 (me) returns SequenceOfBSplineSurface from Geom
      is private;
      ---C++: return const&

fields

  myBasisSurf  : Surface from Geom; 
  myTol        : Real  from  Standard;
  myOsculSurf1 : HSequenceOfBSplineSurface from Geom; 
  myOsculSurf2 : HSequenceOfBSplineSurface from Geom;  
  myKdeg       : HSequenceOfInteger from TColStd; 
--  myKdeg2      : SequenceOfInteger from TColStd; 
  myAlong      : Array1OfBoolean from TColStd;

end OsculatingSurface;