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/*===========================================================================*\
 *                                                                           *
 *                              OpenFlipper                                  *
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 *      Copyright (C) 2001-2010 by Computer Graphics Group, RWTH Aachen      *
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 *                           www.openflipper.org                             *
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 *  This file is part of OpenFlipper.                                        *
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\*===========================================================================*/

/*===========================================================================*\
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 *   $Revision$                                                       *
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 *   $Author$                                                      *
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\*===========================================================================*/
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//=============================================================================
//
//  CLASS ClippingNode
//
//=============================================================================


#ifndef ACG_CLIPPING_NODE_HH
#define ACG_CLIPPING_NODE_HH


//== INCLUDES =================================================================

#include "BaseNode.hh"
#include <string>
#include <fstream>

//== NAMESPACES ===============================================================

namespace ACG {
namespace SceneGraph {
  

//== CLASS DEFINITION =========================================================

  
/** \class ClippingNode ClippingNode.hh <ACG/Scenegraph/ClippingNode.hh>

    Set material and some other stuff for this node and all its
    children.  All changes will be done in the enter() method undone
    in the leave() method.
**/

class ACGDLLEXPORT ClippingNode : public BaseNode
{
public:

  /// Default constructor. Applies all properties.
  ClippingNode( BaseNode*           _parent = 0,
		const std::string&  _name = "<ClippingNode>" )
    : BaseNode(_parent, _name),
      slice_width_(0),
      offset_(0)
  {}


  /// Destructor.
  virtual ~ClippingNode() {}

  /// set class name
  ACG_CLASSNAME(ClippingNode);

  /// set texture
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  void enter(GLState& _state, DrawModes::DrawMode _drawmode);
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  /// restores original texture (or no-texture)
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  void leave(GLState& _state, DrawModes::DrawMode _drawmode);
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  /// set position and normal of plane
  void set_plane(const Vec3f& _position, const Vec3f& _normal, float _eps=0.0);

  /// get position
  const Vec3f& position() const { return position_; }

  /// get normal
  const Vec3f& normal() const { return normal_; }

  /// get slice width
  float slice_width() const { return slice_width_; }

  /// sweep plane along normal by _dist
  void set_offset(float _dist);

  
private:

  Vec3f     position_, normal_;
  GLdouble  plane0_[4], plane1_[4], offset_plane0_[4], offset_plane1_[4];
  float     slice_width_, offset_;
};


//=============================================================================
} // namespace SceneGraph
} // namespace ACG
//=============================================================================
#endif // ACG_CLIPPING_NODE_HH defined
//=============================================================================