-- File:        FunctionTanCuPnt.cdl
-- Created:     Thu Feb 20 7:33:43 1992
-- Author:      Remy GILET
--              <reg@topsn3>
---Copyright:    Matra Datavision 1992


generic class FunctionTanCuPnt from GccIter (
    TheCurve     as any ;
    TheCurveTool as any ) 

inherits FunctionWithDerivative from math
         
    ---Purpose: This abstract class describes a Function of 1 Variable 
    --          used to find a line tangent to a curve and passing 
    --          through a point.

uses Pnt2d from gp    

is

Create (C      : TheCurve         ;
        Point  : Pnt2d    from gp ) returns FunctionTanCuPnt from GccIter;

Value (me : in out      ;
       X  :        Real ;
       F  :    out Real ) returns Boolean;
    ---Purpose: Computes the value of the function F for the variable X.
    --          It returns True if the computation is successfully done,
    --          False otherwise.

Derivative (me    : in out      ;
            X     :        Real ;
            Deriv :    out Real ) returns Boolean;
    ---Purpose: Computes the derivative of the function F for the variable X.
    --          It returns True if the computation is successfully done,
    --          False otherwise.

Values (me    : in out      ;
        X     :        Real ;
        F     : out    Real ;
        Deriv : out    Real ) returns Boolean;
    ---Purpose: Computes the value and the derivative of the function F 
    --          for the variable X.
    --          It returns True if the computation is successfully done,
    --          False otherwise.

fields

TheCurv      : TheCurve;
ThePoint     : Pnt2d from gp;

end FunctionTanCuPnt;