/*
 * 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_NODE_H__
#define __FREESTYLE_NODE_H__

/** \file
 * \ingroup freestyle
 * \brief Abstract class for scene graph nodes. Inherits from BaseObject which defines the addRef
 * release mechanism.
 */

#include "SceneVisitor.h"

#include "../system/BaseObject.h"
#include "../system/FreestyleConfig.h"
#include "../system/Precision.h"

#include "../geometry/BBox.h"
#include "../geometry/Geom.h"

using namespace std;

namespace Freestyle {

using namespace Geometry;

class Node : public BaseObject {
 public:
  inline Node() : BaseObject()
  {
  }

  inline Node(const Node &iBrother) : BaseObject()
  {
    _BBox = iBrother.bbox();
  }

  virtual ~Node()
  {
  }

  /*! Accept the corresponding visitor
   *  Each inherited node must overload this method
   */
  virtual void accept(SceneVisitor &v)
  {
    v.visitNode(*this);
  }

  /*! bounding box management */
  /*! Returns the node bounding box
   *  If no bounding box exists, an empty bbox is returned
   */
  virtual const BBox<Vec3r> &bbox() const
  {
    return _BBox;
  }

  /*! Sets the Node bounding box */
  virtual void setBBox(const BBox<Vec3r> &iBox)
  {
    _BBox = iBox;
  }

  /*! Makes the union of _BBox and iBox */
  virtual void AddBBox(const BBox<Vec3r> &iBox)
  {
    if (iBox.empty()) {
      return;
    }

    if (_BBox.empty()) {
      _BBox = iBox;
    }
    else {
      _BBox += iBox;
    }
  }

  /*! Updates the BBox */
  virtual const BBox<Vec3r> &UpdateBBox()
  {
    return _BBox;
  }

  /*! Clears the bounding box */
  virtual void clearBBox()
  {
    _BBox.clear();
  }

 protected:
 private:
  BBox<Vec3r> _BBox;

#ifdef WITH_CXX_GUARDEDALLOC
  MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:Node")
#endif
};

} /* namespace Freestyle */

#endif  // __FREESTYLE_NODE_H__