/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

/** \file
 * \ingroup freestyle
 * \brief Class to fill in a grid from a SceneGraph (uses only the WingedEdge structures)
 */

#include "WSFillGrid.h"
#include "WEdge.h"

namespace Freestyle {

void WSFillGrid::fillGrid()
{
  if (!_winged_edge || !_grid) {
    return;
  }

  vector<WShape *> wshapes = _winged_edge->getWShapes();
  vector<WVertex *> fvertices;
  vector<Vec3r> vectors;
  vector<WFace *> faces;

  for (vector<WShape *>::const_iterator it = wshapes.begin(); it != wshapes.end(); ++it) {
    faces = (*it)->GetFaceList();

    for (vector<WFace *>::const_iterator f = faces.begin(); f != faces.end(); ++f) {
      (*f)->RetrieveVertexList(fvertices);

      for (vector<WVertex *>::const_iterator wv = fvertices.begin(); wv != fvertices.end(); ++wv) {
        vectors.push_back(Vec3r((*wv)->GetVertex()));
      }

      // occluder will be deleted by the grid
      Polygon3r *occluder = new Polygon3r(vectors, (*f)->GetNormal());
      occluder->setId(_polygon_id++);
      occluder->userdata = (void *)(*f);
      _grid->insertOccluder(occluder);
      vectors.clear();
      fvertices.clear();
    }
    faces.clear();
  }
}

} /* namespace Freestyle */
