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scale.h

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#ifndef __SCALE_H__
#define __SCALE_H__

#include <functional>


namespace Scale {



template<class T=double>
struct Identity : public std::unary_function<T,T> {
  inline T operator() (const T& val) const {  return val;  }
};
 


template<class T=double>
struct Linear : public std::unary_function<T,T> {
  T multiplier, offset;

  Linear(const T& mult=T(1), const T& off=T(0))
    : multiplier(mult), offset(off)  {  }
  
  inline T operator() (T val) const 
    {  return val*multiplier + offset;  }
};
 
} /* namespace Scale */
#endif /* __SCALE_H__ */

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