NodesOfItemReorderer.h

// -*- tab-width: 2; indent-tabs-mode: nil; coding: utf-8-with-signature -*-
//-----------------------------------------------------------------------------
// Copyright 2000-2026 CEA (www.cea.fr) IFPEN (www.ifpenergiesnouvelles.com)
// See the top-level COPYRIGHT file for details.
// SPDX-License-Identifier: Apache-2.0
//-----------------------------------------------------------------------------
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/* NodesOfItemReorderer.h                                      (C) 2000-2025 */
/*                                                                           */
/* Utility class to reorder the nodes of an entity.                          */
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#ifndef ARCANE_CORE_NODESOFITEMREORDERER_H
#define ARCANE_CORE_NODESOFITEMREORDERER_H
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#include "arcane/utils/SmallArray.h"
#include "arcane/core/ItemTypes.h"
 
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namespace Arcane
{
class ItemTypeMng;
 
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/*!
 * \brief Utility class to reorder the nodes of an entity.
 */
class ARCANE_CORE_EXPORT NodesOfItemReorderer
{
  friend class NodesOfItemReordererTester;
 
 public:
 
  NodesOfItemReorderer() = default;
  explicit NodesOfItemReorderer(ItemTypeMng* itm)
  : m_item_type_mng(itm)
  {}
 
 public:
 
  void setItemTypeMng(ItemTypeMng* itm) { m_item_type_mng = itm; }
 
 public:
 
  bool reorder(ItemTypeId type_id, ConstArrayView<Int64> nodes_uids);
  bool reorder1D(Int32 face_index, Int64 node_uid)
  {
    m_work_sorted_nodes.resize(1);
    m_work_sorted_nodes[0] = node_uid;
    return (face_index == 1);
  }
  ConstArrayView<Int64> sortedNodes() const { return m_work_sorted_nodes; }
 
 private:
 
  static bool _reorderOrder2(ConstArrayView<Int64> nodes_uids,
                             ArrayView<Int64> sorted_nodes_uids, bool has_center_node);
  static bool _reorderOrder3(ConstArrayView<Int64> nodes_uids,
                             ArrayView<Int64> sorted_nodes_uids, bool has_center_node);
 
 private:
 
  ItemTypeMng* m_item_type_mng = nullptr;
  SmallArray<Int64, 16> m_work_sorted_nodes;
};
 
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} // End namespace Arcane
 
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#endif