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 * GNU General Public License for more details.
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/** \file blender/freestyle/intern/winged_edge/WSFillGrid.cpp
 *  \ingroup freestyle
 *  \brief Class to fill in a grid from a SceneGraph (uses only the WingedEdge structures)
 *  \author Stephane Grabli
 *  \date 03/05/2003
 */

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

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();
	}
}