LinearTransform.h

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#ifndef _ARDUINOUNIVERSALINPUTS_LINEARVALUETRANSFORM_H
#define _ARDUINOUNIVERSALINPUTS_LINEARVALUETRANSFORM_H

#include "IValueTransform.h"

class LinearTransform : public IValueTransform
{
public:
  LinearTransform(inputanalog_t fromLow, inputanalog_t fromHigh,
                  inputanalog_t toLow, inputanalog_t toHigh)
      : IValueTransform(fromLow, fromHigh)
      , m_toLow(toLow)
      , m_toHigh(toHigh)
  {
  }

  virtual ~LinearTransform() {}

  inputanalog_t transform(inputanalog_t raw) const
  {
    return (raw - m_fromLow) * (m_toHigh - m_toLow) / (m_fromHigh - m_fromLow) +
           m_toLow;
  }

private:
  inputanalog_t m_toLow;  
  inputanalog_t m_toHigh; 
};

#endif