.. _program_listing_file_include_gwmodelpp_spatialweight_Distance.h:

Program Listing for File Distance.h
===================================

|exhale_lsh| :ref:`Return to documentation for file <file_include_gwmodelpp_spatialweight_Distance.h>` (``include/gwmodelpp/spatialweight/Distance.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #ifndef DISTANCE_H
   #define DISTANCE_H
   
   #include <memory>
   #include <string>
   #include <unordered_map>
   #include <armadillo>
   #include <variant>
   
   
   namespace gwm
   {
   
   typedef std::variant<arma::mat, arma::vec, arma::uword> DistParamVariant;   
   
   class Distance
   {
   public:
   
       struct Parameter
       {
           arma::uword total;    
   
           Parameter(): total(0) {}
       };
   
       enum DistanceType
       {
           CRSDistance,        
           MinkwoskiDistance,  
           DMatDistance,       
           OneDimDistance,     
       };
       
       static std::unordered_map<DistanceType, std::string> TypeNameMapper;
   
   public:
   
       virtual ~Distance() {};
   
       virtual Distance* clone() = 0;
   
       virtual DistanceType type() = 0;
   
       virtual Parameter* parameter() const = delete;
   
   
   public:
   
       virtual void makeParameter(std::initializer_list<DistParamVariant> plist) = 0;
   
       virtual arma::vec distance(arma::uword focus) = 0;
   
       virtual double maxDistance() = 0;
       
       virtual double minDistance() = 0;
   
   };
   
   }
   
   
   #endif // DISTANCE_H