-- File:	GeomFill_FunctionGuide.cdl
-- Created:	Thu Jul  9 09:29:32 1998
-- Author:	Stephanie HUMEAU
--		<shu@sun17>
---Copyright:	 Matra Datavision 1998

private  class FunctionGuide  from  GeomFill   
inherits  FunctionSetWithDerivatives  from  math 

uses   

    Vector from math,  
    Matrix from math, 
    Surface from Geom, 
    Curve  from  Geom,  
    HCurve  from  Adaptor3d, 
    Vec  from  gp, 
    XYZ  from  gp,     
    Pnt  from  gp, 
    SectionLaw  from  GeomFill

is
 
    Create(S  : SectionLaw  from  GeomFill;   
           Guide  :  HCurve  from  Adaptor3d; 
           ParamOnLaw  :  Real  =  0.0)   
    returns FunctionGuide  from  GeomFill ; 
     
    SetParam(me  :  in  out;   
              Param  :  Real;  
	      Centre :  Pnt  from  gp;
	      Dir    :  XYZ  from  gp; 
              XDir   :  XYZ  from  gp)  
    is  static;

    NbVariables(me)
    	---Purpose: returns the number of variables of the function.

    returns Integer  is  redefined;
    
    
    NbEquations(me)
    	---Purpose: returns the number of equations of the function.

    returns Integer  is redefined;
    
    
    Value(me: in out; X: Vector; F: out Vector)
    	---Purpose: computes the values <F> of the Functions for the 
    	--          variable <X>.
    	--          Returns True if the computation was done successfully, 
    	--          False otherwise.

    returns Boolean  is redefined;
    
    
    Derivatives(me: in out; X: Vector; D: out Matrix)
    	---Purpose: returns the values <D> of the derivatives for the 
    	--          variable <X>.
    	--          Returns True if the computation was done successfully, 
    	--          False otherwise.

    returns Boolean  is redefined;
    
    
    Values(me: in out; X: Vector; F: out Vector; D: out Matrix)
    	---Purpose: returns the values <F> of the functions and the derivatives
    	--          <D> for the variable <X>.
    	--          Returns True if the computation was done successfully, 
    	--          False otherwise.

    returns Boolean  is redefined;
   

    DerivT(me  : in out;   
           X      : Vector from  math;    
	   DCentre:  XYZ  from  gp; 
	   DDir   :  XYZ  from  gp; 
	   DFDT   :  out Vector) 
    	---Purpose: returns the values <F> of the T derivatives for
    	--          the parameter Param .
    returns Boolean  is static; 
     
    DSDT(me; 
         U,  V  :  Real; 
         DCentre:  XYZ  from  gp; 
	 DDir   :  XYZ  from  gp; 
	 DSDT   :  out  Vec  from  gp)   
    is  private;    
 
    Deriv2T(me: in out;   
    	    DCentre:  XYZ  from  gp; 
	    DDir   :  XYZ  from  gp;
            DFDT,  D2FT  :  out  Vector)	 
    	---Purpose: returns the values <F> of the T2 derivatives for
    	--          the parameter Param .
    returns Boolean  is static;    
   
  
--    DerivTX(me: in out; 
--    	    Param  :  Real  from  Standard; 
--    	    Param0  :  Real  from  Standard; 
--    	    R  :  Vector  from  math; 
--    	    X0  :  Vector  from  math;   
--    	    D: out Matrix)	 
    	---Purpose: returns the values <D> of  the TX derivatives for
    	--          the parameter Param .
--    returns Boolean  is static;        
   
      
--    Deriv2X(me: in out;  
--    	    X  :  Vector  from  math; 
--      	    T: out Tensor)	 
	 ---Purpose: returns the values <T> of  the X2 derivatives for
    	--          the parameter Param .   
--    returns Boolean  is static;     
     
     
    
fields   
    TheGuide  :  HCurve  from  Adaptor3d; 
    TheLaw    :  SectionLaw  from  GeomFill; 
    isconst   :  Boolean; 
    TheCurve  :  Curve  from  Geom;  
    TheConst  :  Curve  from  Geom; 
    TheSurface:  Surface  from  Geom; 
    First,Last:  Real;   
    TheUonS   :  Real;     
    Centre    :  XYZ; 
    Dir       :  XYZ;
end  FunctionGuide;