-- Created on: 1991-06-24
-- Created by: Christophe MARION
-- Copyright (c) 1991-1999 Matra Datavision
-- Copyright (c) 1999-2014 OPEN CASCADE SAS
--
-- This file is part of Open CASCADE Technology software library.
--
-- This library is free software; you can redistribute it and / or modify it
-- under the terms of the GNU Lesser General Public version 2.1 as published
-- by the Free Software Foundation, with special exception defined in the file
-- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
-- distribution for complete text of the license and disclaimer of any warranty.
--
-- Alternatively, this file may be used under the terms of Open CASCADE
-- commercial license or contractual agreement.

package DrawTrSurf 

	---Purpose: This  package supports the   display of parametric
	--          curves and surfaces.
	--          
	--          The  Drawable deferred  classes is  inherited from
	--          the Drawable3D  class  from  the package Draw,  it
	--          adds methods to  draw 3D Curves  and  Curves on 3D
	--          Surfaces.
	--          
	--          The classes Curve Curve2d and Surface are drawable
	--          and  can be  used  to  draw a   single  curve from
	--          packages Geom or Geom2d or a surface from Geom.
	--          
	--          The  Triangulation  and Polygon  from the  package
	--          Poly are also supported.

uses
   MMgt,
   TCollection,
   TColStd,
   Draw,
   Adaptor3d,
   Adaptor2d,
   GeomAbs,
   Geom,
   Geom2d,
   gp,
   Poly

is
    
   deferred class Drawable;
   
   class Point;
   
   class Curve;
   
      class BSplineCurve;
      
      class BezierCurve;
      

   class Curve2d;
   
      class BSplineCurve2d;
      
      class BezierCurve2d;

   class Triangulation2D;

   class Surface;

      class BSplineSurface;

      class BezierSurface;

   class Triangulation;

   class Polygon3D;

   class Polygon2D;


    --     
    -- package methods to handle named points curves and surface.
    -- 

    Set(Name : CString; G : Pnt from gp);
	---Purpose: Sets <G> in the variable <Name>.  Overwrite the
	--          variable if already set.
    
    Set(Name : CString; G : Pnt2d from gp);
	---Purpose: Sets <G> in the variable <Name>.  Overwrite the
	--          variable if already set.
    
    Set(Name : CString; G : Geometry from Geom;
        isSenseMarker : Boolean = Standard_True);
	---Purpose: Sets <G> in the variable <Name>.  Overwrite the
	--          variable if already set.
  --          isSenseMarker indicates whether to render the
  --          sense glyph (arrow) for curves or not
    
    Set(Name : CString; C : Curve from Geom2d;
        isSenseMarker : Boolean = Standard_True);
	---Purpose: Sets <C> in the variable <Name>.  Overwrite the
	--          variable if already set.
  --          isSenseMarker indicates whether to render the
  --          sense glyph (arrow) for curves or not
    
    Set(Name : CString; T : Triangulation from Poly);
	---Purpose: Sets <T> in the variable <Name>.  Overwrite the
	--          variable if already set.
    
    Set(Name : CString; P : Polygon3D from Poly);
	---Purpose: Sets <P> in the variable <Name>.  Overwrite the
	--          variable if already set.
    
    Set(Name : CString; P : Polygon2D from Poly);
	---Purpose: Sets <P> in the variable <Name>.  Overwrite the
	--          variable if already set.
    
    
    -- if the variable name is a void string a graphic selection is made.
    
    Get(Name : in out CString) returns Geometry from Geom;
	---Purpose: Get  the variable <S>.  Returns a  null  handle if
	--          none, and print a warning message.

    GetPoint(Name :  in out CString; P : in out Pnt from gp)
    returns Boolean;
	---Purpose: Gets the variable. Returns False if none and print
	--          a warning message.
    
    GetPoint2d(Name :  in out CString; P : in out Pnt2d from gp)
    returns Boolean;
	---Purpose: Gets the variable. Returns False if none and print
	--          a warning message.
    
    GetCurve(Name : in out CString) returns Curve from Geom;
	---Purpose: Get  the variable <S>.  Returns a  null  handle if
	--          none, and print a warning message.
    
    GetBezierCurve(Name :  in out CString) returns BezierCurve from Geom;
	---Purpose: Get  the variable <S>.  Returns a  null  handle if
	--          none, and print a warning message.
    
    GetBSplineCurve(Name :  in out CString) returns BSplineCurve from Geom;
	---Purpose: Get  the variable <S>.  Returns a  null  handle if
	--          none, and print a warning message.
    
    GetCurve2d(Name :   in out CString) returns Curve from Geom2d;
	---Purpose: Get  the variable <S>.  Returns a  null  handle if
	--          none, and print a warning message.
    
    GetBezierCurve2d(Name : in out CString) returns BezierCurve from Geom2d;
	---Purpose: Get  the variable <S>.  Returns a  null  handle if
	--          none, and print a warning message.
    
    GetBSplineCurve2d(Name : in out CString) returns BSplineCurve from Geom2d;
	---Purpose: Get  the variable <S>.  Returns a  null  handle if
	--          none, and print a warning message.
    
    GetSurface(Name : in out CString) returns Surface from Geom;
	---Purpose: Get  the variable <S>.  Returns a  null  handle if
	--          none, and print a warning message.
    
    GetBezierSurface(Name : in out CString) returns BezierSurface from Geom;
	---Purpose: Get  the variable <S>.  Returns a  null  handle if
	--          none, and print a warning message.
    
    GetBSplineSurface(Name : in out CString) returns BSplineSurface from Geom;
	---Purpose: Get  the variable <S>.  Returns a  null  handle if
	--          none, and print a warning message.
    
    GetTriangulation(Name : in out CString) returns Triangulation from  Poly;
	---Purpose: Get  the variable <S>.  Returns a  null  handle if
	--          none, and print a warning message.
    
    GetPolygon3D(Name : in out CString) returns Polygon3D from  Poly;
	---Purpose: Get  the variable <S>.  Returns a  null  handle if
	--          none, and print a warning message.
    
    GetPolygon2D(Name : in out CString) returns Polygon2D from  Poly;
	---Purpose: Get  the variable <S>.  Returns a  null  handle if
	--          none, and print a warning message.
    
    
    
    BasicCommands(I : in out Interpretor from Draw);
	---Purpose: defines display commands.
    
end DrawTrSurf;