BSplines.h

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/*
  Copyright (C) 2005 - 2009-10-27, Hammersmith Imanet Ltd
  Copyright (C) 2013, University College London
  This file is part of STIR.

  SPDX-License-Identifier: Apache-2.0

  See STIR/LICENSE.txt for details
*/
#ifndef __stir_numerics_BSplines__H__
#define __stir_numerics_BSplines__H__

#include "stir/common.h"

START_NAMESPACE_STIR

namespace BSpline
{

typedef double pos_type;

enum BSplineType
{
  near_n,
  linear,
  quadratic,
  cubic,
  quartic,
  quintic,
  oMoms
};

template <class RandIterOut, class IterT, class constantsT>
inline void BSplines_coef(RandIterOut c_begin_iterator,
                          RandIterOut c_end_iterator,
                          IterT input_begin_iterator,
                          IterT input_end_iterator,
                          const constantsT z1,
                          const constantsT z2,
                          const constantsT lambda); // to be taken from the class

template <typename pos_type>
inline pos_type BSplines_1st_der_weight(const pos_type relative_position, const BSplineType spline_type);

template <typename pos_type>
inline pos_type BSplines_weights(const pos_type relative_position, const BSplineType spline_type);

//*/
} // namespace BSpline

END_NAMESPACE_STIR

#include "stir/numerics/BSplines_weights.inl"
#include "stir/numerics/BSplines_coef.inl"

#endif