text: //
  // Copyright (C) 2013 OpenSim Ltd.
  //
  // This program 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 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 Lesser General Public License for more details.
  //
  // You should have received a copy of the GNU Lesser General Public License
  // along with this program; if not, see <http://www.gnu.org/licenses/>.
  //
  
  #ifndef __INET_IDEALOBSTACLELOSS_H
  #define __INET_IDEALOBSTACLELOSS_H
  
  #include "inet/common/IVisitor.h"
  #include "inet/common/figures/TrailFigure.h"
  #include "inet/environment/contract/IPhysicalEnvironment.h"
  #include "inet/physicallayer/base/packetlevel/TracingObstacleLossBase.h"
  #include "inet/physicallayer/contract/packetlevel/IRadioMedium.h"
  
  namespace inet {
  
  namespace physicallayer {
  
  class INET_API IdealObstacleLoss : public TracingObstacleLossBase
  {
    protected:
      class TotalObstacleLossComputation : public IVisitor
      {
        protected:
          const IdealObstacleLoss *obstacleLoss = nullptr;
          const Coord transmissionPosition;
          const Coord receptionPosition;
          mutable bool isObstacleFound_ = false;
  
        public:
          TotalObstacleLossComputation(const IdealObstacleLoss *obstacleLoss, const Coord& transmissionPosition, const Coord& receptionPosition);
          void visit(const cObject *object) const override;
          bool isObstacleFound() const { return isObstacleFound_; }
      };
  
      /** @name Parameters */
      //@{
      /**
       * The radio medium where the radio signal propagation takes place.
       */
      IRadioMedium *medium = nullptr;
      /**
       * The physical environment that provides to obstacles.
       */
      physicalenvironment::IPhysicalEnvironment *physicalEnvironment = nullptr;
      //@}
  
    protected:
      virtual void initialize(int stage) override;
  
      virtual bool isObstacle(const physicalenvironment::IPhysicalObject *object, const Coord& transmissionPosition, const Coord& receptionPosition) const;
  
    public:
      IdealObstacleLoss();
      virtual std::ostream& printToStream(std::ostream& stream, int level) const override;
      virtual double computeObstacleLoss(Hz frequency, const Coord& transmissionPosition, const Coord& receptionPosition) const override;
  };
  
  } // namespace physicallayer
  
  } // namespace inet
  
  #endif // ifndef __INET_IDEALOBSTACLELOSS_H
  
  