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/*===========================================================================*\
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 *                              OpenFlipper                                  *
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 *      Copyright (C) 2001-2011 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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\*===========================================================================*/
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//=============================================================================
//
//  CLASS PointNode
//
//=============================================================================


#ifndef ACG_POINTNODE_HH
#define ACG_POINTNODE_HH


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

#include "BaseNode.hh"
#include "DrawModes.hh"
#include <vector>

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

namespace ACG {
namespace SceneGraph {

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

	      

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

    PointNode renders points and normals.
    
    These elements are internally stored in arrays and rendered using
    OpenGL vertex and normal arrays.
**/

class ACGDLLEXPORT PointNode : public BaseNode
{
public:
   
  // typedefs
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  typedef std::vector<ACG::Vec3d>      PointVector;
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  typedef PointVector::iterator        PointIter;
  typedef PointVector::const_iterator  ConstPointIter;
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  typedef std::vector<ACG::Vec4f>      ColorVector;
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  typedef ColorVector::iterator        ColorIter;
  typedef ColorVector::const_iterator  ConstColorIter;


  /// default constructor
  PointNode( BaseNode*         _parent=0,
	     std::string  _name="<PointNode>" )
    : BaseNode(_parent, _name)
  {}
 
  /// destructor
  ~PointNode() {}

  /// static name of this class
  ACG_CLASSNAME(PointNode);

  /// return available draw modes
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  DrawModes::DrawMode availableDrawModes() const;
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  /// update bounding box
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  void boundingBox(Vec3d& _bbMin, Vec3d& _bbMax);
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  /// draw points and normals
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  void draw(GLState& _state, const DrawModes::DrawMode& _drawMode);
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  /// reserve mem for _np points and _nn normals
  void reserve(unsigned int _np, unsigned int _nn, unsigned int _nc) {
    points_.reserve(_np); normals_.reserve(_nn); colors_.reserve(_nc);
  }

  /// add point
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  void add_point(const ACG::Vec3d& _p) { points_.push_back(_p); }
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  /// add normal
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  void add_normal(const ACG::Vec3d& _n) { normals_.push_back(_n); }
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  /// add color
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  void add_color(const ACG::Vec4f& _c) { colors_.push_back(_c); }
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  /// how many points?
  unsigned int n_points() const { return points_.size(); }

  /// clear points
  void clear_points() { points_.clear(); }
  /// clear normals
  void clear_normals() { normals_.clear(); }
  /// clear colors
  void clear_colors() { colors_.clear(); }
  /// clear points and normals and colors
  void clear() { clear_points(); clear_normals(); clear_colors(); }

  /// get point container
  PointVector& points() { return points_; }
  /// get normal container
  PointVector& normals() { return normals_; }
  /// get color container
  ColorVector& colors() { return colors_; }


private:
  
  PointVector  points_, normals_;
  ColorVector  colors_;
};


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