UserFunctionMD.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2007 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#pragma once
 
//----------------------------------------------------------------------
// Includes
//----------------------------------------------------------------------
#include "MantidAPI/IFunctionMD.h"
#include "MantidAPI/ParamFunction.h"
#include "MantidGeometry/muParser_Silent.h"
#include "MantidMDAlgorithms/DllConfig.h"
 
namespace Mantid {
namespace MDAlgorithms {
class MANTID_MDALGORITHMS_DLL UserFunctionMD : virtual public API::IFunctionMD, virtual public API::ParamFunction {
public:
  UserFunctionMD();
  std::string name() const override { return "UserFunctionMD"; }
 
  std::vector<std::string> getAttributeNames() const override;
  bool hasAttribute(const std::string &attName) const override;
  Attribute getAttribute(const std::string &attName) const override;
  void setAttribute(const std::string &attName, const Attribute &attr) override;
  void initDimensions() override;
 
protected:
  double functionMD(const API::IMDIterator &r) const override;
  static double *AddVariable(const char *varName, void *pufun);
 
  void setFormula();
 
private:
  mu::Parser m_parser;
  mutable std::vector<double> m_vars;
  std::vector<std::string> m_varNames;
  std::string m_formula;
};
 
} // namespace MDAlgorithms
} // namespace Mantid