text: /*
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version 2
   * of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
   */
  
  #ifndef __FREESTYLE_SCENE_VISITOR_H__
  #define __FREESTYLE_SCENE_VISITOR_H__
  
  /** \file
   * \ingroup freestyle
   * \brief Class to visit (without doing anything) a scene graph structure
   */
  
  #include "../system/FreestyleConfig.h"
  
  #ifdef WITH_CXX_GUARDEDALLOC
  #  include "MEM_guardedalloc.h"
  #endif
  
  namespace Freestyle {
  
  #define VISIT_COMPLETE_DEF(type) \
    virtual void visit##type(type &) \
    { \
    } \
    virtual void visit##type##Before(type &) \
    { \
    } \
    virtual void visit##type##After(type &) \
    { \
    }
  
  #define VISIT_DECL(type) virtual void visit##type(type &);
  
  #define VISIT_COMPLETE_DECL(type) \
    virtual void visit##type##Before(type &); \
    virtual void visit##type(type &); \
    virtual void visit##type##After(type &);
  
  class Node;
  class NodeShape;
  class NodeGroup;
  class NodeLight;
  class NodeCamera;
  class NodeDrawingStyle;
  class NodeTransform;
  class NodeViewLayer;
  
  class Rep;
  class LineRep;
  class OrientedLineRep;
  class TriangleRep;
  class VertexRep;
  class IndexedFaceSet;
  class DrawingStyle;
  class FrsMaterial;
  
  class SceneVisitor {
   public:
    SceneVisitor()
    {
    }
    virtual ~SceneVisitor()
    {
    }
  
    virtual void beginScene()
    {
    }
    virtual void endScene()
    {
    }
  
    //
    // visitClass methods
    //
    //////////////////////////////////////////////
  
    VISIT_COMPLETE_DEF(Node)
    VISIT_COMPLETE_DEF(NodeShape)
    VISIT_COMPLETE_DEF(NodeGroup)
    VISIT_COMPLETE_DEF(NodeLight)
    VISIT_COMPLETE_DEF(NodeCamera)
    VISIT_COMPLETE_DEF(NodeDrawingStyle)
    VISIT_COMPLETE_DEF(NodeTransform)
    VISIT_COMPLETE_DEF(NodeViewLayer)
  
    VISIT_COMPLETE_DEF(Rep)
    VISIT_COMPLETE_DEF(LineRep)
    VISIT_COMPLETE_DEF(OrientedLineRep)
    VISIT_COMPLETE_DEF(TriangleRep)
    VISIT_COMPLETE_DEF(VertexRep)
    VISIT_COMPLETE_DEF(IndexedFaceSet)
    VISIT_COMPLETE_DEF(DrawingStyle)
    VISIT_COMPLETE_DEF(FrsMaterial)
  
  #ifdef WITH_CXX_GUARDEDALLOC
    MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:SceneVisitor")
  #endif
  };
  
  } /* namespace Freestyle */
  
  #endif  // __FREESTYLE_SCENE_VISITOR_H__
  