(C++) ConvertMatrix

Container code snippet that converts a std::vector<std::vector<X> > to std::vector<std::vector<Y> > using static_cast.


#include <cassert>

#include <vector>



//From http://www.richelbilderbeek.nl/CppConvertMatrix.htm

template <class Source, class Target>

const std::vector<std::vector<Target> > ConvertMatrix(

  const std::vector<std::vector<Source> >& v)

{

  const int maxy = static_cast<int>(v.size());

  assert(maxy>0);

  const int maxx = static_cast<int>(v[0].size());

  std::vector<std::vector<Target> > t(maxy, std::vector<Target>(maxx));

  for (int y=0; y!=maxy; ++y)

  {

    for (int x=0; x!=maxx; ++x)

    {

      t[y][x] = static_cast<Target>(v[y][x]);

    }

  }

  return t;

}

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