TrilinearInterpolation.h

Go to the documentation of this file.

#ifndef TIL_LINEAR_INTERPOLATION_H
#define TIL_LINEAR_INTERPOLATION_H
// TODO: this file should be rename "Linear interpolation"

// includes from TIL library
#include "til/til_common.h"
#include "til/labels.h"

namespace til
{

  template < typename T >
  class LinearInterpolation
    : public Interpolator_label
  {
  public: // typedefs
  
        typedef LinearInterpolation Self;
        
  public:
  
        // NB: There is a priori no reason for f to be the same type as x.
        // However, forcing x and f to have the same type forces the
        // (necessary anyway) casting to be done once, before function
        // call.
        inline static T compute
        (
        T f1,   
        T f2,   
        T x             
        )
        {
                //return f2*x+f1*(1-x);
                // this saves one multiplication!
                return f1 + x*(f2-f1);
        }
  };

} // namespace til


#endif