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diff --git a/pose_cell_set.h b/pose_cell_set.h
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+++ b/pose_cell_set.h
@@ -0,0 +1,54 @@
+
+///////////////////////////////////////////////////////////////////////////
+// This program is free software: you can redistribute it and/or modify  //
+// it under the terms of the version 3 of the GNU General Public License //
+// as published by the Free Software Foundation.                         //
+//                                                                       //
+// This program is distributed in the hope that it will be useful, but   //
+// WITHOUT ANY WARRANTY; without even the implied warranty of            //
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      //
+// General Public License for more details.                              //
+//                                                                       //
+// You should have received a copy of the GNU General Public License     //
+// along with this program. If not, see <http://www.gnu.org/licenses/>.  //
+//                                                                       //
+// Written by Francois Fleuret, (C) IDIAP                                //
+// Contact <francois.fleuret@idiap.ch> for comments & bug reports        //
+///////////////////////////////////////////////////////////////////////////
+
+#ifndef POSE_CELL_SET_H
+#define POSE_CELL_SET_H
+
+#include "pose_cell.h"
+#include "labelled_image.h"
+
+class PoseCellSet {
+protected:
+  // This is a bit ugly. Notice that all the code is written in such a
+  // way that we never have more than one such PoseCellSet in memory
+  // at any moment
+  static const int max_nb_cells = 500000;
+
+  int _max_nb;
+  int _nb_added;
+  PoseCell *_cells;
+
+public:
+
+  PoseCellSet();
+  ~PoseCellSet();
+
+  inline int nb_cells() { return _nb_added; }
+
+  inline PoseCell *get_cell(int k) {
+    ASSERT(k >= 0 && k < _nb_added);
+    return _cells + k;
+  }
+
+  PoseCell *get_containing_cell(Pose *p);
+
+  void erase_content();
+  void add_cell(PoseCell *cell);
+};
+
+#endif