BSpline2d.h

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//                   OpenMS -- Open-Source Mass Spectrometry
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// Copyright The OpenMS Team -- Eberhard Karls University Tuebingen,
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// $Maintainer: Timo Sachsenberg $
// $Authors: Stephan Aiche, Timo Sachsenberg $
// --------------------------------------------------------------------------

#pragma once

#include <vector>

#include <OpenMS/config.h>
#include <OpenMS/KERNEL/StandardDeclarations.h>
#include <OpenMS/CONCEPT/Types.h>
#include <OpenMS/CONCEPT/Exception.h>
#include <OpenMS/CONCEPT/Macros.h>

// forward declaration of impl class BSpline
namespace eol_bspline
{
template <class T>
class BSpline;
}

namespace OpenMS
{
  class OPENMS_DLLAPI BSpline2d
  {
public:

    // Note: Don't change boundary condition constants as these are passed through to the eol-bspline implementation.
    enum BoundaryCondition
    {
      BC_ZERO_ENDPOINTS = 0,
      BC_ZERO_FIRST = 1,
      BC_ZERO_SECOND = 2
    };

    BSpline2d(const std::vector<double>& x, const std::vector<double>& y,
              double wavelength = 0, BoundaryCondition boundary_condition = BC_ZERO_SECOND, 
              Size num_nodes = 0);

    virtual ~BSpline2d();

    bool solve(const std::vector<double>& y);

    double eval(const double x) const;

    double derivative(const double x) const;

    double derivatives(double x, unsigned order = 1) const;

    bool ok() const;

    static void debug(bool enable);

private:

    // Pointer to actual implementation. Note: This class follows the PIMPL idiom hiding the actual 
    // B-spline implementation behind this pointer to avoid any dependency of the interface to the 
    // implementation. Thus, the eol splines are only required during compilation of OpenMS and 
    // not when linking against OpenMS.
    eol_bspline::BSpline<double>* spline_;
  };

}