-- File:        LProp3d_SurfaceTool.cdl
-- Created:     Fri Aug  2 17:14:36 2002
-- Author:      Alexander KARTOMIN  (akm)
--              <a-kartomin@opencascade.com>
-- NB:          This originates from BRepLProp being abstracted of BRep.
---Copyright:   Matra Datavision 2002

class SurfaceTool from LProp3d

uses Pnt      from gp,
     Vec      from gp,
     HSurface from Adaptor3d

is

    Value(myclass; S : HSurface; U, V : Real; P : out Pnt);
    ---Purpose: Computes the point <P> of parameter <U> and <V> on the 
    --          HSurface <S>.
        
    D1   (myclass; S : HSurface; U, V : Real; P : out Pnt; D1U, D1V : out Vec);
    ---Purpose: Computes the point <P> and first derivative <D1*> of 
    --          parameter <U> and <V> on the HSurface <S>.

    D2   (myclass; S : HSurface; U, V : Real; 
              P : out Pnt; D1U, D1V, D2U, D2V, DUV : out Vec);
    ---Purpose: Computes the point <P>, the first derivative <D1*> and second
    --          derivative <D2*> of parameter <U> and <V> on the HSurface <S>.
              
    DN   (myclass; S : HSurface; U, V : Real;  IU,  IV  :  Integer) 
    returns  Vec;
     
    Continuity(myclass; S : HSurface) returns Integer;
    ---Purpose: returns the order of continuity of the HSurface <S>.
    --          returns 1 : first derivative only is computable
    --          returns 2 : first and second derivative only are computable.

    Bounds(myclass; S : HSurface; U1, V1, U2, V2 : out Real);
    ---Purpose: returns the bounds of the HSurface.

end SurfaceTool;