InterpolationModel.h

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#ifndef OPENMS_TRANSFORMATIONS_FEATUREFINDER_INTERPOLATIONMODEL_H
#define OPENMS_TRANSFORMATIONS_FEATUREFINDER_INTERPOLATIONMODEL_H

#include <OpenMS/TRANSFORMATIONS/FEATUREFINDER/BaseModel.h>
#include <OpenMS/MATH/MISC/LinearInterpolation.h>

namespace OpenMS
{
  class OPENMS_DLLAPI InterpolationModel :
    public BaseModel<1>
  {

public:
    typedef DoubleReal IntensityType;
    typedef DPosition<1> PositionType;
    typedef DoubleReal CoordinateType;
    typedef Math::LinearInterpolation<DoubleReal> LinearInterpolation;

    InterpolationModel() :
      BaseModel<1>(),
      interpolation_()
    {
      this->defaults_.setValue("interpolation_step", 0.1, "Sampling rate for the interpolation of the model function ");
      this->defaults_.setValue("intensity_scaling", 1.0, "Scaling factor used to adjust the model distribution to the intensities of the data");
    }

    InterpolationModel(const InterpolationModel & source) :
      BaseModel<1>(source),
      interpolation_(source.interpolation_),
      interpolation_step_(source.interpolation_step_),
      scaling_(source.scaling_)
    {
    }

    virtual ~InterpolationModel()
    {
    }

    virtual InterpolationModel & operator=(const InterpolationModel & source)
    {
      if (&source == this) return *this;

      BaseModel<1>::operator=(source);
      interpolation_step_ = source.interpolation_step_;
      interpolation_ = source.interpolation_;
      scaling_ = source.scaling_;

      return *this;
    }

    IntensityType getIntensity(const PositionType & pos) const
    {
      return interpolation_.value(pos[0]);
    }

    IntensityType getIntensity(CoordinateType coord) const
    {
      return interpolation_.value(coord);
    }

    const LinearInterpolation & getInterpolation() const
    {
      return interpolation_;
    }

    CoordinateType getScalingFactor() const
    {
      return scaling_;
    }

    virtual void setOffset(CoordinateType offset)
    {
      interpolation_.setOffset(offset);
    }

    void getSamples(SamplesType & cont) const
    {
      cont = SamplesType();
      BaseModel<1>::PeakType peak;
      for (Size i = 0; i < interpolation_.getData().size(); ++i)
      {
        peak.setIntensity(interpolation_.getData()[i]);
        peak.getPosition()[0] = interpolation_.index2key(i);
        cont.push_back(peak);
      }
    }

    virtual CoordinateType getCenter() const
    {
      throw Exception::NotImplemented(__FILE__, __LINE__, __PRETTY_FUNCTION__);
      return CoordinateType();           // we will never get here, but this avoids a warning
    }

    virtual void setSamples()
    {
      throw Exception::NotImplemented(__FILE__, __LINE__, __PRETTY_FUNCTION__);
    }

    void setInterpolationStep(CoordinateType interpolation_step)
    {
      interpolation_step_ = interpolation_step;
      this->param_.setValue("interpolation_step", interpolation_step_);
    }

    void setScalingFactor(CoordinateType scaling)
    {
      scaling_ = scaling;
      this->param_.setValue("intensity_scaling", scaling_);
    }

protected:
    LinearInterpolation interpolation_;
    CoordinateType interpolation_step_;
    CoordinateType scaling_;

    void updateMembers_()
    {
      BaseModel<1>::updateMembers_();
      interpolation_step_ = this->param_.getValue("interpolation_step");
      scaling_ = this->param_.getValue("intensity_scaling");
    }

  };
}

#endif // OPENMS_TRANSFORMATIONS_FEATUREFINDER_INTERPOLATIONMODEL_H