ExpSigmoidConverter.h

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#ifndef EXP_SIGMOID_CONVERTER_H_
#define EXP_SIGMOID_CONVERTER_H_
 
#include "ElementsKernel/Exception.h"
#include "ModelFitting/Parameters/CoordinateConverter.h"
 
namespace ModelFitting {

class ExpSigmoidConverter: public CoordinateConverter {
 
public:
 
  ExpSigmoidConverter(const double min_value, const double max_value, const double scale_factor=1.0) :
      m_min_value(min_value), m_max_value(max_value), m_scale_factor(scale_factor) {
    if (m_min_value > m_max_value) {
      throw Elements::Exception()
          << "ExpSigmoidConverter: min_value larger than max_value!";
    }
    if (m_min_value <= 0.0) {
      throw Elements::Exception() << "ExpSigmoidConverter: min_value is not a positive value!";
    }
  }

  double worldToEngine(const double world_value) const override;

  double engineToWorld(const double engine_value) const override;
 
  double getEngineToWorldDerivative(const double value) const override;

  virtual ~ExpSigmoidConverter();
 
private:

  const double m_min_value;

  const double m_max_value;
 
  const double m_scale_factor;
};
 
} // namespace ModelFitting
 
#endif /* EXP_SIGMOID_CONVERTER_H_ */