TrapMF.h

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#ifndef         TRAPMF_H_
# define        TRAPMF_H_

#include "MembershipFn.h"   // for MembershipFn

namespace IRIS {

  using namespace std;

  namespace Fuzzy {

    class TrapMF : public MembershipFn
    {

      public:

        static const unsigned NUM_PARMS = 4;

    //  CONSTRUCTORS  /////////////////////////////////////////////////////

        TrapMF( double a=0 , double b=0 , double c=0 , double d=0 );
        TrapMF( const string& name , 
                double   a=0 , double   b=0 , double c=0 , double d=0 , 
                double min=0 , double max=0                );
        TrapMF( const MembershipFn::parm_list& parm );

    //  DESTRUCTORS  //////////////////////////////////////////////////////

        ~TrapMF( );

    //  SET MEMBER FUNCTIONS (MUTATORS)  //////////////////////////////////

        void set ( double a=0 , double b=0 , double c=0 , double d=0 );

        // implemented virtual functions from IRIS::Fuzzy::Numeric
        virtual void discretize( unsigned degree );

    //  GET MEMBER FUNCTIONS (ACCESSORS)  /////////////////////////////////

        void get ( double &a , double &b , double &c , double &d );

        // implemented virtual functions from IRIS::Fuzzy::Numeric
        virtual double eval( double x ) const;
        virtual double operator() ( double val ) const;

        // implemented virtual functions from IRIS::Fuzzy::Set
        virtual void draw() const;

    }; // end of TrapMF class

  } // end of Fuzzy namespace

} // end of IRIS namespace

#endif      /* !TRAPMF_H_ */

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