UnstructuredMeshUtilities.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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/* UnstructuredMeshUtilities.h                                 (C) 2000-2025 */
/*                                                                           */
/* Utility functions for a mesh.                                             */
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#ifndef ARCANE_MESH_UNSTRUCTUREDMESHUTILITIES_H
#define ARCANE_MESH_UNSTRUCTUREDMESHUTILITIES_H
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#include "arcane/utils/TraceAccessor.h"
 
#include "arcane/core/IMeshUtilities.h"
 
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namespace Arcane
{
 
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class IMesh;
class ItemPairGroup;
class ItemPairGroupImpl;
class BasicItemPairGroupComputeFunctor;
 
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class UnstructuredMeshUtilities
: public TraceAccessor
, public IMeshUtilities
{
 public:
 
  explicit UnstructuredMeshUtilities(IMesh* mesh);
  ~UnstructuredMeshUtilities() override; 
 
 public:
 
  void changeOwnersFromCells() override;
 
  void localIdsFromConnectivity(eItemKind item_kind,
                                IntegerConstArrayView items_nb_node,
                                Int64ConstArrayView items_connectivity,
                                Int32ArrayView local_ids,
                                bool allow_null) override;
  void getFacesLocalIdFromConnectivity(ConstArrayView<ItemTypeId> items_type,
                                       ConstArrayView<Int64> items_connectivity,
                                       ArrayView<Int32> local_ids,
                                       bool allow_null) override;

  Real3 computeNormal(const FaceGroup& face_group,
                      const VariableNodeReal3& nodes_coord) override;
 
  Real3 computeDirection(const NodeGroup& node_group,
                         const VariableNodeReal3& nodes_coord,
                         Real3* n1, Real3* n2) override;
 
  void computeAdjency(ItemPairGroup adjency_array, eItemKind link_kind,
                      Integer nb_layer) override;
 
  bool writeToFile(const String& file_name, const String& service_name) override;
 
  void partitionAndExchangeMeshWithReplication(IMeshPartitionerBase* partitioner,
                                               bool initial_partition) override;
 
  void mergeNodes(Int32ConstArrayView nodes_local_id,
                  Int32ConstArrayView nodes_to_merge_local_id,
                  bool allow_non_corresponding_face) override;
 
  void computeAndSetOwnersForNodes() override;
  void computeAndSetOwnersForEdges() override;
  void computeAndSetOwnersForFaces() override;
 
  void recomputeItemsUniqueIdFromNodesUniqueId() override;
 
 private:
 
  IMesh* m_mesh = nullptr;
  BasicItemPairGroupComputeFunctor* m_compute_adjacency_functor = nullptr;
 
 private:
 
  Real3 _round(Real3 value);
  Real3 _broadcastFarthestNode(Real distance, const Node& node,
                               const VariableNodeReal3& nodes_coord);
};
 
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} // namespace Arcane
 
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#endif