0022098: EDF 2036 SMESH: Create groups from none conected parts of a mesh

Move SMESH_ElementSearcher to from SMESH/SMESH_MeshEditor.hxx SMESHUtils/SMESH_MeshAlgos.hxx
in order to make SMESH_ElementSearcher accessible from Controls/SMESH_Controls.cxx

+	SMESH_MeshAlgos.cxx

src/SMESHUtils/Makefile.am

@@ -34,7 +34,8 @@ salomeinclude_HEADERS = \
 	SMESH_ComputeError.hxx \
 	SMESH_File.hxx \
 	SMESH_Utils.hxx \
-	SMESH_TryCatch.hxx
+	SMESH_TryCatch.hxx \
+	SMESH_MeshAlgos.hxx
 
 # Libraries targets
 
@@ -46,7 +47,8 @@ dist_libSMESHUtils_la_SOURCES = \
 	SMESH_Octree.cxx \
 	SMESH_OctreeNode.cxx \
 	SMESH_TryCatch.cxx \
-	SMESH_File.cxx
+	SMESH_File.cxx \
+	SMESH_MeshAlgos.cxx
 
 # additionnal information to compile and link file
 libSMESHUtils_la_CPPFLAGS = \

src/SMESHUtils/SMESH_MeshAlgos.hxx

@@ -0,0 +1,137 @@
+// Copyright (C) 2007-2013  CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License.
+//
+// This library 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
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+// File      : SMESH_MeshAlgos.hxx
+// Created   : Tue Apr 30 18:00:36 2013
+// Author    : Edward AGAPOV (eap)
+
+// This file holds some low level algorithms extracted from SMESH_MeshEditor
+// to make them accessible from Controls package
+
+
+#ifndef __SMESH_MeshAlgos_HXX__
+#define __SMESH_MeshAlgos_HXX__
+
+#include "SMDSAbs_ElementType.hxx"
+#include "SMDS_ElemIterator.hxx"
+#include "SMESH_TypeDefs.hxx"
+
+#include <TopAbs_State.hxx>
+#include <vector>
+
+class gp_Pnt;
+class gp_Ax1;
+class SMDS_MeshNode;
+class SMDS_MeshElement;
+class SMDS_Mesh;
+
+//=======================================================================
+/*!
+ * \brief Searcher for the node closest to a point
+ */
+//=======================================================================
+
+struct SMESH_NodeSearcher
+{
+  virtual const SMDS_MeshNode* FindClosestTo( const gp_Pnt& pnt ) = 0;
+  virtual void MoveNode( const SMDS_MeshNode* node, const gp_Pnt& toPnt ) = 0;
+};
+
+//=======================================================================
+/*!
+ * \brief Searcher for elements
+ */
+//=======================================================================
+
+struct SMESH_ElementSearcher
+{
+  /*!
+   * \brief Find elements of given type where the given point is IN or ON.
+   *        Returns nb of found elements and elements them-selves.
+   *
+   * 'ALL' type means elements of any type excluding nodes and 0D elements
+   */
+  virtual int FindElementsByPoint(const gp_Pnt&                           point,
+                                  SMDSAbs_ElementType                     type,
+                                  std::vector< const SMDS_MeshElement* >& foundElems) = 0;
+  /*!
+   * \brief Return an element most close to the given point
+   */
+  virtual const SMDS_MeshElement* FindClosestTo( const gp_Pnt&       point,
+                                                 SMDSAbs_ElementType type) = 0;
+  /*!
+   * \brief Return elements possibly intersecting the line
+   */
+  virtual void GetElementsNearLine( const gp_Ax1&                           line,
+                                    SMDSAbs_ElementType                     type,
+                                    std::vector< const SMDS_MeshElement* >& foundElems) = 0;
+  /*!
+   * \brief Find out if the given point is out of closed 2D mesh.
+   */
+  virtual TopAbs_State GetPointState(const gp_Pnt& point) = 0;
+};
+
+namespace SMESH_MeshAlgos
+{
+  /*!
+   * \brief Return true if the point is IN or ON of the element
+   */
+  bool IsOut( const SMDS_MeshElement* element, const gp_Pnt& point, double tol );
+
+  double GetDistance( const SMDS_MeshFace* face, const gp_Pnt& point );
+
+  /*!
+   * Return a face having linked nodes n1 and n2 and which is
+   * - not in avoidSet,
+   * - in elemSet provided that !elemSet.empty()
+   * i1 and i2 optionally returns indices of n1 and n2
+   */
+  const SMDS_MeshElement* FindFaceInSet(const SMDS_MeshNode*    n1,
+                                        const SMDS_MeshNode*    n2,
+                                        const TIDSortedElemSet& elemSet,
+                                        const TIDSortedElemSet& avoidSet,
+                                        int*                    i1=0,
+                                        int*                    i2=0);
+  /*!
+   * \brief Calculate normal of a mesh face
+   */
+  bool FaceNormal(const SMDS_MeshElement* F, gp_XYZ& normal, bool normalized=true);
+
+  /*!
+   * \brief Return nodes common to two elements
+   */
+  std::vector< const SMDS_MeshNode*> GetCommonNodes(const SMDS_MeshElement* e1,
+                                                    const SMDS_MeshElement* e2);
+
+  /*!
+   * \brief Return SMESH_NodeSearcher. The caller is responsible for deleteing it
+   */
+  SMESH_NodeSearcher* GetNodeSearcher( SMDS_Mesh& mesh );
+
+  /*!
+   * \brief Return SMESH_ElementSearcher. The caller is responsible for deleting it
+   */
+  SMESH_ElementSearcher* GetElementSearcher( SMDS_Mesh& mesh );
+  SMESH_ElementSearcher* GetElementSearcher( SMDS_Mesh& mesh,
+                                             SMDS_ElemIteratorPtr elemIt );
+}
+
+#endif