eoSelectPerc.h

//-----------------------------------------------------------------------------

#ifndef _eoSelectPerc_h
#define _eoSelectPerc_h


//-----------------------------------------------------------------------------
#include <eoSelect.h>
#include <eoSelectOne.h>
#include <math.h>
//-----------------------------------------------------------------------------

template<class EOT>
class eoSelectPerc : public eoSelect<EOT>
{
 public:
     eoSelectPerc(eoSelectOne<EOT>& _select, float _rate = 1.0)
         : select(_select), rate(_rate) {}

  virtual void operator()(const eoPop<EOT>& _source, eoPop<EOT>& _dest)
  {
    size_t target = static_cast<size_t>(floor(rate * _source.size()));

    _dest.resize(target);

    select.setup(_source);

    for (size_t i = 0; i < _dest.size(); ++i)
      _dest[i] = select(_source);
  }

private :
  eoSelectOne<EOT>& select;
  float rate;
};

#endif