value()

double ts::tapers::FourPoint::value ( const int &  i ) const

privatevirtual

returns taper value for sample index i. Private virtual function such that this function can only be accessed through the template function apply(). This way we ensure that the appropriate index range was set first.

Implements ts::tapers::Taper.

Definition at line 232 of file tapers.cc.

References Mfac1, Mfac2, Mti1, Mti2, Mti3, and Mti4.

    {
       //cout << i << " ";
       double retval=0.;
       double t=static_cast<double>(i);
       if (t<Mti1)
       {
         //cout << "t<Mti1" << " ";
         retval=0.;
       }
       else if (t<=Mti2)
       {
         //cout << "t<=Mti2" << " ";
         retval=0.5*(1.-cos(Mfac1*(t-Mti1)));
       }
       else if (t<Mti3)
       {
         //cout << "t<Mti3" << " ";
         retval=1.;
       }
       else if (t<=Mti4)
       {
         //cout << "t<=Mti4" << " ";
         retval=0.5*(1.+cos(Mfac2*(t-Mti3)));
       }
       else
       {
         //cout << "else" << " ";
         retval=0.;
       }
       //cout << "retval=" << retval << endl;
       return (retval);
    } // double FourPoint::value(const int& i) const