hilbert_r_tree_split.hpp

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#ifndef MLPACK_CORE_TREE_RECTANGLE_TREE_HILBERT_R_TREE_SPLIT_HPP
#define MLPACK_CORE_TREE_RECTANGLE_TREE_HILBERT_R_TREE_SPLIT_HPP

#include <mlpack/prereqs.hpp>

namespace mlpack {
namespace tree  {

template<size_t splitOrder = 2>
class HilbertRTreeSplit
{
 public:
  template<typename TreeType>
  static void SplitLeafNode(TreeType* tree, std::vector<bool>& relevels);

  template<typename TreeType>
  static bool SplitNonLeafNode(TreeType* tree, std::vector<bool>& relevels);

 private:
  template<typename TreeType>
  static bool FindCooperatingSiblings(TreeType* parent,
                                      const size_t iTree,
                                      size_t& firstSibling,
                                      size_t& lastSibling);

  template<typename TreeType>
  static void RedistributeNodesEvenly(const TreeType* parent,
                                      const size_t firstSibling,
                                      const size_t lastSibling);

  template<typename TreeType>
  static void RedistributePointsEvenly(TreeType* parent,
                                       const size_t firstSibling,
                                       const size_t lastSibling);
};

} // namespace tree
} // namespace mlpack

// Include implementation.
#include "hilbert_r_tree_split_impl.hpp"

#endif