TriangleNode.cc

/*===========================================================================*\
 *                                                                           *
 *                              OpenFlipper                                  *
 *      Copyright (C) 2001-2009 by Computer Graphics Group, RWTH Aachen      *
 *                           www.openflipper.org                             *
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 *  This file is part of OpenFlipper.                                        *
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 *  OpenFlipper is free software: you can redistribute it and/or modify      *
 *  it under the terms of the GNU Lesser General Public License as           *
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 *  or inline functions from this file, or you compile this file and         *
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 *  covered by the GNU Lesser General Public License.                        *
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\*===========================================================================*/

/*===========================================================================*\
 *                                                                           *
 *   $Revision: 6743 $                                                       *
 *   $Author: moebius $                                                      *
 *   $Date: 2009-08-05 11:03:10 +0200 (Mi, 05. Aug 2009) $                   *
 *                                                                           *
\*===========================================================================*/



//=============================================================================
//
//  CLASS TriangleNode - IMPLEMENTATION
//
//=============================================================================


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


#include "TriangleNode.hh"
#include "DrawModes.hh"


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


namespace ACG {
namespace SceneGraph {


//== IMPLEMENTATION ========================================================== 


TriangleNode::TriangleNode( BaseNode*   _parent,
                            std::string _name  )
  : BaseNode(_parent, _name)
{
}
  

//----------------------------------------------------------------------------


TriangleNode::~TriangleNode() 
{
}


//----------------------------------------------------------------------------


void
TriangleNode::boundingBox( Vec3f & _bbMin, Vec3f & _bbMax )
{
  PointVector::const_iterator p_it  = point_.begin(),
                              p_end = point_.end();

  for ( ; p_it != p_end; ++p_it )
  {
    _bbMin.minimize( *p_it );
    _bbMax.maximize( *p_it );
  }
}


//----------------------------------------------------------------------------

  
unsigned int 
TriangleNode::
availableDrawModes() const
{
  unsigned int drawModes(0);
  
  drawModes |= DrawModes::WIREFRAME;
  drawModes |= DrawModes::HIDDENLINE;
  drawModes |= DrawModes::SOLID_FLAT_SHADED;
  //  drawModes |= DrawModes::SOLID_FACES_COLORED;

  return drawModes;
}


//----------------------------------------------------------------------------


void
TriangleNode::
draw(GLState& /* _state */ , unsigned int _drawMode)
{
  glDepthFunc(depthFunc());

  if (_drawMode & DrawModes::WIREFRAME ||
      _drawMode & DrawModes::HIDDENLINE )
  {
    glDisable(GL_LIGHTING);
    glShadeModel(GL_FLAT);
    glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
    draw_wireframe();
    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
  }


  if (_drawMode & DrawModes::SOLID_FLAT_SHADED ||
      _drawMode & DrawModes::HIDDENLINE )
  {
    glEnable(GL_LIGHTING);
    glShadeModel(GL_FLAT);
    glDepthRange(0.01, 1.0);
    draw_faces();
    glDepthRange(0.0, 1.0);
  }

  if (_drawMode & DrawModes::SOLID_FACES_COLORED)
  {
    glDisable(GL_LIGHTING);
    glShadeModel(GL_FLAT);
    glDepthRange(0.01, 1.0);
    draw_faces();
    glDepthRange(0.0, 1.0);
  }
}


//----------------------------------------------------------------------------


void
TriangleNode::
draw_vertices()
{
  //  glDrawArrays(GL_POINTS, 0, mesh_.n_vertices());
}


//----------------------------------------------------------------------------


void
TriangleNode::draw_faces()
{
  glBegin(GL_TRIANGLES);

  unsigned int i = 0;
  unsigned int j = 0;

  for ( ; i < point_.size(); i += 3, j += 1 )
  {
    glNormal(  normal_[j] );
    
    glVertex( point_[i + 0] );
    glVertex( point_[i + 1] );
    glVertex( point_[i + 2] );
  }

  glEnd();
}


//----------------------------------------------------------------------------


void
TriangleNode::draw_wireframe()
{
  glBegin(GL_TRIANGLES);
  for ( unsigned int i = 0; i < point_.size(); ++i )
    glVertex( point_[i] );
  glEnd();
}


//----------------------------------------------------------------------------


void
TriangleNode::pick( GLState & _state, PickTarget /* _target */ )
{
  _state.pick_set_maximum (1);
  _state.pick_set_name (0);
  draw_faces();
}


//----------------------------------------------------------------------------

//=============================================================================
} // namespace SceneGraph
} // namespace ACG
//=============================================================================