Method operator ()

code/data-structures/kd_tree.cpp:14–20

    int c;
    cmp(int _c) : c(_c) {}
    bool operator ()(const pt &a, const pt &b) const {
      for (int i = 0, cc; i <= K; i++) {
        cc = i == 0 ? c : i - 1;
        if (abs(a.coord[cc] - b.coord[cc]) > EPS)
          return a.coord[cc] < b.coord[cc];
      }
      return false; } };
  struct bb {
    pt from, to;
    bb(pt _from, pt _to) : from(_from), to(_to) {}