OccluderSource.h

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/*
 * 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.
 */
 
#pragma once
 
#include "../geometry/GridHelpers.h"
 
#include "../winged_edge/WEdge.h"
 
#ifdef WITH_CXX_GUARDEDALLOC
#  include "MEM_guardedalloc.h"
#endif
 
namespace Freestyle {
 
class OccluderSource {
  // Disallow copying and assignment
  OccluderSource(const OccluderSource &other);
  OccluderSource &operator=(const OccluderSource &other);
 
 public:
  OccluderSource(const GridHelpers::Transform &transform, WingedEdge &we);
  virtual ~OccluderSource();
 
  void begin();
  virtual bool next();
  bool isValid();
 
  WFace *getWFace();
  Polygon3r getCameraSpacePolygon();
  Polygon3r &getGridSpacePolygon();
 
  virtual void getOccluderProscenium(real proscenium[4]);
  virtual real averageOccluderArea();
 
 protected:
  WingedEdge &wingedEdge;
  vector<WShape *>::const_iterator currentShape, shapesEnd;
  vector<WFace *>::const_iterator currentFace, facesEnd;
 
  bool valid;
 
  Polygon3r cachedPolygon;
  const GridHelpers::Transform &transform;
 
  void buildCachedPolygon();
 
#ifdef WITH_CXX_GUARDEDALLOC
  MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:OccluderSource")
#endif
};
 
} /* namespace Freestyle */