using SearchMethod = std::function<int (std::size_t, double, pcl::Indices &, std::vector<float> &)>; using SearchMethodSurface = std::function<int (const PointCloudIn &cloud, std::size_t index, double, pcl::Indices &, std::vector<float> &)>;
These two functions are in the ‘feature.h’ file, but I haven’t found their specific implementations.