ModBaseT.hh

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//=============================================================================
//
//  CLASS ModBaseT
//
//=============================================================================

#ifndef OPENMESH_DECIMATER_MODBASET_HH
#define OPENMESH_DECIMATER_MODBASET_HH


//== INCLUDES =================================================================

#include <OpenMesh/Core/Utils/Noncopyable.hh>
#include <OpenMesh/Tools/Decimater/CollapseInfoT.hh>
#include <string>


//== NAMESPACE ================================================================

namespace OpenMesh  {
namespace Decimater {


//== FORWARD DECLARATIONS =====================================================

template <typename Mesh> class BaseDecimaterT;


//== CLASS DEFINITION =========================================================

template <typename Module>
class ModHandleT : private Utils::Noncopyable
{
public:

  typedef ModHandleT<Module> Self;
  typedef Module module_type;

public:

  ModHandleT() : mod_(NULL) {}

  ~ModHandleT() { /* don't delete mod_, since handle is not owner! */ }

  bool is_valid() const { return mod_ != NULL; }

private:

#if defined(OM_CC_MSVC)
  friend class BaseDecimaterT;
#else
  template <typename Mesh> friend class BaseDecimaterT;
#endif

  void     clear()           { mod_ = NULL; }
  void     init(Module* _m)  { mod_ = _m;   }
  Module*  module()          { return mod_; }


private:

  Module* mod_;

};




//== CLASS DEFINITION =========================================================



#define DECIMATER_MODNAME(_mod_name) \
 virtual const std::string& name() const { \
  static std::string _s_modname_(#_mod_name); return _s_modname_; \
}


#define DECIMATING_MODULE(Classname, MeshT, Name)       \
  typedef Classname < MeshT >    Self;          \
  typedef OpenMesh::Decimater::ModHandleT< Self >     Handle; \
  typedef OpenMesh::Decimater::ModBaseT< MeshT > Base;   \
  typedef typename Base::Mesh         Mesh;             \
  typedef typename Base::CollapseInfo CollapseInfo;     \
  DECIMATER_MODNAME( Name )



//== CLASS DEFINITION =========================================================


template <typename MeshT>
class ModBaseT
{
public:
  typedef MeshT Mesh;
  typedef CollapseInfoT<MeshT>                 CollapseInfo;

  enum {
    ILLEGAL_COLLAPSE = -1, 
    LEGAL_COLLAPSE   = 0   
  };

protected:

  ModBaseT(MeshT& _mesh, bool _is_binary)
    : error_tolerance_factor_(1.0), mesh_(_mesh), is_binary_(_is_binary) {}

public:

  virtual ~ModBaseT() { }

  DECIMATER_MODNAME(ModBase);


  bool is_binary(void) const { return is_binary_; }

  void set_binary(bool _b)   { is_binary_ = _b; }


public: // common interface

   virtual void initialize() { }

   virtual float collapse_priority(const CollapseInfoT<MeshT>& /* _ci */)
   { return LEGAL_COLLAPSE; }

   virtual void preprocess_collapse(const CollapseInfoT<MeshT>& /* _ci */)
   {}

   virtual void postprocess_collapse(const CollapseInfoT<MeshT>& /* _ci */)
   {}

   virtual void set_error_tolerance_factor(double _factor) {
     if (_factor >= 0.0 && _factor <= 1.0)
       error_tolerance_factor_ = _factor;
   }


protected:

  MeshT& mesh() { return mesh_; }

  // current percentage of the original constraint
  double error_tolerance_factor_;

private:

  // hide copy constructor & assignemnt
  ModBaseT(const ModBaseT& _cpy);
  ModBaseT& operator=(const ModBaseT& );

  MeshT& mesh_;

  bool is_binary_;
};


//=============================================================================
} // namespace Decimater
} // namespace OpenMesh
//=============================================================================
#endif // OPENMESH_DECIMATER_MODBASE_HH defined
//=============================================================================