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 *  Point Cloud Library (PCL) - www.pointclouds.org
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 * $Id$
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#pragma once

#include <pcl/pcl_base.h>
#include <pcl/PolygonMesh.h>

namespace pcl
{
  template <typename PointT> class PointCloud;

  /** \brief @b CloudSurfaceProcessing represents the base class for algorithms that takes a point cloud as input and
    * produces a new output cloud that has been modified towards a better surface representation. These types of
    * algorithms include surface smoothing, hole filling, cloud upsampling etc.
    *
    * \author Alexandru E. Ichim
    * \ingroup surface
    */
  template <typename PointInT, typename PointOutT>
  class CloudSurfaceProcessing : public PCLBase<PointInT>
  {
    public:
      using Ptr = shared_ptr<CloudSurfaceProcessing<PointInT, PointOutT> >;
      using ConstPtr = shared_ptr<const CloudSurfaceProcessing<PointInT, PointOutT> >;

      using PCLBase<PointInT>::input_;
      using PCLBase<PointInT>::indices_;
      using PCLBase<PointInT>::initCompute;
      using PCLBase<PointInT>::deinitCompute;

    public:
      /** \brief Constructor. */
      CloudSurfaceProcessing () : PCLBase<PointInT> ()
      {};
      
      /** \brief Empty destructor */
      ~CloudSurfaceProcessing () override = default;

      /** \brief Process the input cloud and store the results
        * \param[out] output the cloud where the results will be stored
        */
      virtual void
      process (pcl::PointCloud<PointOutT> &output);

    protected:
      /** \brief Abstract cloud processing method */
      virtual void
      performProcessing (pcl::PointCloud<PointOutT> &output) = 0;

  };


  /** \brief @b MeshProcessing represents the base class for mesh processing algorithms.
    * \author Alexandru E. Ichim
    * \ingroup surface
    */
  class PCL_EXPORTS MeshProcessing
  {
    public:
      using Ptr = shared_ptr<MeshProcessing>;
      using ConstPtr = shared_ptr<const MeshProcessing>;

      using PolygonMeshConstPtr = PolygonMesh::ConstPtr;

      /** \brief Constructor. */
      MeshProcessing () = default;

      /** \brief Destructor. */
      virtual ~MeshProcessing () = default;

      /** \brief Set the input mesh that we want to process
        * \param[in] input the input polygonal mesh
        */
      inline void
      setInputMesh (const pcl::PolygonMeshConstPtr &input) 
      { input_mesh_ = input; }

      /** \brief Get the input mesh to be processed
        * \returns the mesh
        */
      inline pcl::PolygonMeshConstPtr
      getInputMesh () const
      { return input_mesh_; }

      /** \brief Process the input surface mesh and store the results
        * \param[out] output the resultant processed surface model
        */
      void 
      process (pcl::PolygonMesh &output);

    protected:
      /** \brief Initialize computation. Must be called before processing starts. */
      virtual bool 
      initCompute ();
      
      /** \brief UnInitialize computation. Must be called after processing ends. */
      virtual void 
      deinitCompute ();

      /** \brief Abstract surface processing method. */
      virtual void 
      performProcessing (pcl::PolygonMesh &output) = 0;

      /** \brief Abstract class get name method. */
      virtual std::string 
      getClassName () const
      { return (""); }

      /** \brief Input polygonal mesh. */
      pcl::PolygonMeshConstPtr input_mesh_;
  };
}

#include "pcl/surface/impl/processing.hpp"
