LineNode.cc 3.26 KB
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//=============================================================================
//
//                               OpenFlipper
//        Copyright (C) 2008 by Computer Graphics Group, RWTH Aachen
//                           www.openflipper.org
//
//-----------------------------------------------------------------------------
//
//                                License
//
//  OpenFlipper is free software: you can redistribute it and/or modify
//  it under the terms of the GNU Lesser General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  OpenFlipper 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 Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public License
//  along with OpenFlipper.  If not, see <http://www.gnu.org/licenses/>.
//
//-----------------------------------------------------------------------------
//
//   $Revision$
//   $Author$
//   $Date$
//
//=============================================================================




//=============================================================================
//
//  CLASS LineNode - IMPLEMENTATION
//
//=============================================================================

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

#include "LineNode.hh"
#include "../GL/gl.hh"


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

namespace ACG {
namespace SceneGraph {

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


void
LineNode::
boundingBox(Vec3f& _bbMin, Vec3f& _bbMax)
{
  ConstPointIter p_it=points_.begin(), p_end=points_.end();
  for (; p_it!=p_end; ++p_it)
  {
    _bbMin.minimize(*p_it);
    _bbMax.maximize(*p_it);
  }
}


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


unsigned int
LineNode::
availableDrawModes() const
{
  return DrawModes::WIREFRAME;
}


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


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

  if (_drawMode & DrawModes::WIREFRAME)
  {
    glDisable(GL_LIGHTING);

    if (line_mode_ == LineSegmentsMode)
      glBegin(GL_LINES);
    else
      glBegin(GL_LINE_STRIP);

    if ((line_mode_ == LineSegmentsMode) && (points_.size()/2 == colors_.size()) )
    {
      ConstPointIter p_it=points_.begin(), p_end=points_.end();
      ConstColorIter c_it=colors_.begin();

      int cnt = 0;
      for (; p_it!=p_end; ++p_it)
      {
        if ((cnt > 0) && (cnt % 2 == 0))
          ++c_it;

        glColor(*c_it);
        glVertex(*p_it);

        ++cnt;
      }
    }
    else
    {
      ConstPointIter p_it=points_.begin(), p_end=points_.end();
      for (; p_it!=p_end; ++p_it)
        glVertex(*p_it);
    }

    glEnd();
  }

  glDepthFunc(GL_LESS);
}



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