QuadNode.hh

/*===========================================================================*\
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//=============================================================================
//
//  CLASS QuadNode
//
//=============================================================================

#ifndef ACG_QUADNODE_HH
#define ACG_QUADNODE_HH

//=============================================================================

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

//=============================================================================

namespace ACG {
namespace SceneGraph {
              
//=============================================================================


class ACGDLLEXPORT QuadNode : public BaseNode
{

public:

  typedef std::vector<ACG::Vec3f> PointVector;
   
  QuadNode( BaseNode*     _parent=0,
      const std::string&  _name="<QuadNode>" );
  virtual ~QuadNode();
  
  ACG_CLASSNAME(QuadNode);


  DrawModes::DrawMode  availableDrawModes() const;

  void boundingBox(Vec3d& _bbMin, Vec3d& _bbMax);
  void draw(GLState& _state, const DrawModes::DrawMode& _drawMode);
  void pick(GLState& _state, PickTarget _target);

  void add_quad( const ACG::Vec3f & _p0,
                 const ACG::Vec3f & _p1,
                 const ACG::Vec3f & _p2,
                 const ACG::Vec3f & _p3 )
  {
    point_.push_back( _p0 );
    point_.push_back( _p1 );
    point_.push_back( _p2 );  
    point_.push_back( _p3 );

    ACG::Vec3f n = ( _p1 - _p0 ) % ( _p2 - _p1 );
    if ( n.norm() > 0.00001 )
      n.normalize();
    else
      n = Vec3f( 0, 0, 0 );
    normal_.push_back( n );
  }

  void clear()
  {
    point_.clear();
    normal_.clear();
  }

protected:

  enum FaceMode { FACE_NORMALS, FACE_COLORS, PER_VERTEX };

  void draw_vertices();
  void draw_faces();
  void draw_wireframe();

  PointVector point_;
  PointVector normal_;

};


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