/usr/include/casacore/scimath/Functionals/KaiserBFunction.tcc is in casacore-dev 2.2.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | //# KaiserBFunction.cc: A one dimensional Kaiser-Bessel function
//# Copyright (C) 2002
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
#ifndef SCIMATH_KAISERBFUNCTION_TCC
#define SCIMATH_KAISERBFUNCTION_TCC
#include <casacore/scimath/Functionals/KaiserBFunction.h>
#include <casacore/casa/BasicSL/Constants.h>
#include <casacore/casa/BasicMath/Math.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
//# Constructors
//# Operators
template<class T>
T KaiserBFunction<T>::eval(typename Function<T>::FunctionArg x) const {
T par2 = param_p[KBPAR] * param_p[KBPAR];
T x1 = T(C::pi) * param_p[KBPAR];
T x2 = T(C::pi) * sqrt(par2 - T(1.0));
T x3 = T(C::pi) * sqrt(par2 - T(4.0));
T a = sinh(x1);
T b = sinh(x2) * T(2.0);
T c = sinh(x3) * T(2.0);
T sum = a + b + c;
a /= sum;
b /= sum;
c /= sum;
T y = (x[0]-param_p[CENTER]) * T(C::pi) / param_p[WIDTH];
return param_p[HEIGHT]*(a + b * cos(y) + c * cos(T(2.0) * y));
}
//# Member functions
} //# NAMESPACE CASACORE - END
#endif
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