-- File:	ISurfaceTool.cdl
-- Created:	Fri Mar  6 16:18:58 1992
-- Author:	Isabelle GRIGNON
--		<isg@phobox>
---Copyright:	 Matra Datavision 1992


deferred generic class ISurfaceTool from IntImp
       ( ImplicitSurface as any)
                                        
	---Purpose: Template class for a tool on an
	--          implicit surface.


uses Vec from gp


is

    Value(myclass; Is: ImplicitSurface;
          X, Y, Z: Real from Standard)
	  
    	---Purpose: Returns the value of the function.

    	returns Real from Standard;

    
    Gradient(myclass; Is: ImplicitSurface;
             X, Y, Z: Real from Standard ; V: out Vec from gp);
	     
    	---Purpose: Returns the gradient of the function.



    ValueAndGradient(myclass; Is: ImplicitSurface; 
                     X, Y, Z: Real from Standard;
                     Val: out Real from Standard; Grad: out Vec from gp);
		     
    	---Purpose: Returns the value and the gradient.


    Tolerance(myclass; Is: ImplicitSurface )
    
	---Purpose: returns the tolerance of the zero of the implicit function

    	returns Real from Standard; 

    
end ISurfaceTool;