--
-- File      :  SurfaceOfRevolution.cdl
-- Created   :  Sat 9 Jan 1993
-- Author    : CKY / Contract Toubro-Larsen ( Kiran )
--
---Copyright : MATRA-DATAVISION  1993
--

class SurfaceOfRevolution from IGESGeom  inherits IGESEntity

        ---Purpose: defines IGESSurfaceOfRevolution, Type <120> Form <0>
        --          in package IGESGeom
        --          A surface of revolution is defined by an axis of rotation
        --          a generatrix, and start and terminate rotation angles. The
        --          surface is created by rotating the generatrix about the axis
        --          of rotation through the start and terminate rotation angles.

uses

        Pnt         from gp,
        Dir         from gp,
        Vec         from gp,
        Ax1         from gp,
        Trsf        from gp,
        Line        from IGESGeom

is

        Create returns mutable SurfaceOfRevolution;

        -- Specific Methods pertaining to the class

        Init (me          : mutable;
              anAxis      : Line;
              aGeneratrix : IGESEntity;
              aStartAngle : Real;
              anEndAngle  : Real);
        ---Purpose : This method is used to set the fields of the class Line
        --       - anAxis      : Axis of revolution
        --       - aGeneratrix : The curve which is revolved about the axis
        --       - aStartAngle : Start angle of the surface of revolution
        --       - anEndAngle  : End angle of the surface of revolution

        AxisOfRevolution (me) returns Line;
        ---Purpose : returns the axis of revolution

        Generatrix (me) returns IGESEntity;
        ---Purpose : returns the curve which is revolved about the axis

        StartAngle (me) returns Real;
        ---Purpose : returns start angle of revolution

        EndAngle (me) returns Real;
        ---Purpose : returns end angle of revolution

fields

--
-- Class    : IGESGeom_SurfaceOfRevolution
--
-- Purpose  : Declaration of variables specific to the definition
--            of the Class SurfaceOfRevolution.
--
-- Reminder : A SurfaceOfRevolution instance is defined by :
--            An axis, a generatrix curve which is rotated about
--            the axis, the start and ending angles of rotation.

        theLine       : Line;
        theGeneratrix : IGESEntity;
        theStartAngle : Real;
        theEndAngle   : Real;

end SurfaceOfRevolution;