Tabsinc Class Reference

#include <xmipp_funcs.h>

Public Member Functions
	Tabsinc (const double dd, const int xx)
virtual	~Tabsinc ()
double	operator() (double val) const
void	filltable ()

Public Attributes
double	sampl
double	isampl
int	xmax
int	no_elem
double *	tabulatedsinc

Detailed Description

Tabulated Sinc = SIN(PI*X)/(PI*X)

A lookup-table with the given sampling rate and range is created.

tabsinc TSINC(0.0001,64);
if (TSINC(1)==0)
   std::cout << "This is true!\n";

This class is not ported to Python.

Definition at line 68 of file xmipp_funcs.h.

Constructor & Destructor Documentation

Tabsinc()

Tabsinc::Tabsinc ( const double  dd, const int  xx  )

inline

Constructor with sampling rate and range

Definition at line 80 of file xmipp_funcs.h.

    {
        sampl = dd;
        isampl = 1.0/sampl;
        xmax = xx;
        filltable();
    }

~Tabsinc()

virtual Tabsinc::~Tabsinc ( )

inlinevirtual

Definition at line 89 of file xmipp_funcs.h.

    {
        delete tabulatedsinc;
    }

Member Function Documentation

filltable()

void Tabsinc::filltable ( )

inline

Actually fill the table

Definition at line 109 of file xmipp_funcs.h.

    {
        no_elem = (int)(xmax / sampl);
        tabulatedsinc = new double[no_elem];
        tabulatedsinc[0] = 1;
        for (int i = 1; i < no_elem; i++)
        {
            double xx = (double) i * sampl * PI;
            tabulatedsinc[i] = sin(xx) / xx;
        }
    }

operator()()

double Tabsinc::operator() ( double  val ) const

inline

Value access. Tabulated sine in radians

Definition at line 102 of file xmipp_funcs.h.

    {
        int aux=(int)(val * isampl);
        return tabulatedsinc[ABS(aux)];
    }

Member Data Documentation

isampl

double Tabsinc::isampl

Definition at line 73 of file xmipp_funcs.h.

no_elem

int Tabsinc::no_elem

Definition at line 75 of file xmipp_funcs.h.

sampl

double Tabsinc::sampl

Definition at line 72 of file xmipp_funcs.h.

tabulatedsinc

double* Tabsinc::tabulatedsinc

Definition at line 76 of file xmipp_funcs.h.

xmax

int Tabsinc::xmax

Definition at line 74 of file xmipp_funcs.h.

---

The documentation for this class was generated from the following file:

• xmippCore/core/xmipp_funcs.h