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337 lines
11 KiB
C++
337 lines
11 KiB
C++
// Copyright (C) 2007-2016 CEA/DEN, EDF R&D, OPEN CASCADE
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//
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// Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
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// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
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//
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// SMESH SMDS : implementaion of Salome mesh data structure
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// File : SMDS_VolumeTool.hxx
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// Module : SMESH
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// Created : Tue Jul 13 11:27:17 2004
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// Author : Edward AGAPOV (eap)
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//
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#ifndef SMDS_VolumeTool_HeaderFile
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#define SMDS_VolumeTool_HeaderFile
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#include "SMESH_SMDS.hxx"
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class SMDS_MeshElement;
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class SMDS_MeshNode;
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class SMDS_VtkVolume;
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class SMDS_MeshVolume;
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#include <vector>
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#include <set>
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#include <map>
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// =========================================================================
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//
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// Class providing topological and other information about SMDS_MeshVolume:
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// allows iteration on faces or, to be precise, on nodes of volume sides;
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// provides info on nodes connection etc.
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//
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// =========================================================================
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class SMDS_EXPORT SMDS_VolumeTool
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{
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public:
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enum VolumeType { UNKNOWN = -1, TETRA = 0, PYRAM, PENTA, HEXA,
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HEX_PRISM, QUAD_TETRA, QUAD_PYRAM, QUAD_PENTA, QUAD_HEXA,
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POLYHEDA, NB_VOLUME_TYPES }; // to keep synchronised with GetSize()!
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SMDS_VolumeTool ();
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~SMDS_VolumeTool ();
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SMDS_VolumeTool( const SMDS_MeshElement* theVolume,
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const bool ignoreCentralNodes = true);
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bool Set( const SMDS_MeshElement* theVolume,
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const bool ignoreCentralNodes = true,
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const std::vector<const SMDS_MeshNode*>* nodes = 0);
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// Set volume.
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// Return false if theVolume is not of type SMDSAbs_Volume.
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// ignoreCentralNodes makes skip nodes at face centers when returning
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// nodes of faces of SMDSEntity_TriQuad_Hexa.
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// alternative nodes can be provided
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const SMDS_MeshVolume* Element() const;
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// return element
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int ID() const;
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// return element ID
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bool IsPoly() const { return myPolyedre; }
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// -----------------------
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// general info
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// -----------------------
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VolumeType GetVolumeType() const;
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bool IsForward() const { return myVolForward; }
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// Check volume orientation. can be changed by Inverse().
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// See node order of forward volumes at the file bottom
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void Inverse();
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// Change nodes order as if the volume changes its orientation:
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// top and bottom faces are reversed.
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// Result of IsForward() and methods returning nodes change
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const SMDS_MeshNode** GetNodes() const { return (const SMDS_MeshNode**) &myVolumeNodes[0]; }
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// Return array of volume nodes
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int NbNodes() const { return myVolumeNodes.size(); }
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// Return array of volume nodes
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double GetSize() const;
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// Return element volume
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bool GetBaryCenter (double & X, double & Y, double & Z) const;
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bool IsOut(double X, double Y, double Z, double tol) const;
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// Classify a point
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// -----------------------
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// info on node connection
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// -----------------------
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bool IsLinked (const SMDS_MeshNode* theNode1,
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const SMDS_MeshNode* theNode2,
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const bool theIgnoreMediumNodes=false) const;
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// Return true if theNode1 is linked with theNode2.
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// If theIgnoreMediumNodes then corner nodes of quadratic cell are considered linked as well
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bool IsLinked (const int theNode1Index,
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const int theNode2Index,
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bool theIgnoreMediumNodes=false) const;
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// Return true if the node with theNode1Index is linked
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// with the node with theNode2Index
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// If theIgnoreMediumNodes then corner nodes of quadratic cell are considered linked as well
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int GetNodeIndex(const SMDS_MeshNode* theNode) const;
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// Return an index of theNode
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int GetAllExistingEdges(std::vector<const SMDS_MeshElement*> & edges) const;
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// Fill vector with boundary edges existing in the mesh
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double MinLinearSize2() const;
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// Return minimal square distance between connected corner nodes
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double MaxLinearSize2() const;
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// Return maximal square distance between connected corner nodes
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// -------------
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// info on faces
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// -------------
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// For all elements, 0-th face is bottom based on the first nodes.
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// For prismatic elements (tetra,hexa,prisms), 1-th face is a top one.
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// For all elements, side faces follow order of bottom nodes
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void SetExternalNormal ();
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// Node order in faces will be so that faces normals are external.
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int NbFaces() const { return myNbFaces; }
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// Return number of faces of the volume. In the following
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// methods 0 <= faceIndex < NbFaces()
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int NbFaceNodes( int faceIndex ) const;
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// Return number of nodes in the array of face nodes
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const int* GetFaceNodesIndices( int faceIndex ) const;
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// Return the array of face nodes indices
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// To comfort link iteration, the array
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// length == NbFaceNodes( faceIndex ) + 1 and
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// the last node index == the first one, except for
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// SMDSEntity_TriQuad_Hexa at ignoreCentralNodes==false.
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// NOTE: for the quadratic volume, node indices are in the order the nodes encounter
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// in face boundary and not the order they are in the mesh face
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const SMDS_MeshNode** GetFaceNodes( int faceIndex ) const;
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// Return the array of face nodes.
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// To comfort link iteration, the array
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// length == NbFaceNodes( faceIndex ) + 1 and
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// the last node == the first one, except for
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// SMDSEntity_TriQuad_Hexa at ignoreCentralNodes==false.
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// NOTE: for the quadratic volume, nodes are in the order they encounter in face boundary
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// and not the order they are in the mesh face
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// WARNING: do not modify the array, some methods
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// work basing on its contents
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bool GetFaceNodes (int faceIndex,
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std::set<const SMDS_MeshNode*>& theFaceNodes ) const;
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// Return a set of face nodes.
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bool IsFaceExternal( int faceIndex ) const;
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// Check normal orientation of a face.
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// SetExternalNormal() is taken into account.
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bool IsFreeFace( int faceIndex, const SMDS_MeshElement** otherVol=0 ) const;
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// Fast check that only one volume is built on nodes of a given face
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// otherVol returns another volume sharing the given facet
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bool IsFreeFaceAdv( int faceIndex, const SMDS_MeshElement** otherVol=0 ) const;
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// Thorough check that all volumes built on the face nodes lays on one side
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// otherVol returns another volume sharing the given facet
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bool GetFaceNormal (int faceIndex, double & X, double & Y, double & Z) const;
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// Return a normal to a face
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bool GetFaceBaryCenter (int faceIndex, double & X, double & Y, double & Z) const;
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// Return barycenter of a face
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double GetFaceArea( int faceIndex ) const;
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// Return face area
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int GetOppFaceIndex( int faceIndex ) const;
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// Return index of the opposite face if it exists, else -1.
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int GetCenterNodeIndex( int faceIndex ) const;
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// Return index of the node located at face center of a quadratic element like HEX27
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int GetFaceIndex( const std::set<const SMDS_MeshNode*>& theFaceNodes,
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const int theFaceIndexHint=-1) const;
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// Return index of a face formed by theFaceNodes.
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// Return -1 if a face not found
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//int GetFaceIndex( const std::set<int>& theFaceNodesIndices );
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// Return index of a face formed by theFaceNodesIndices
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// Return -1 if a face not found
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int GetAllExistingFaces(std::vector<const SMDS_MeshElement*> & faces) const;
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// Fill vector with boundary faces existing in the mesh
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// ------------------------
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// static methods for faces
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// ------------------------
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static VolumeType GetType(int nbNodes);
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// return VolumeType by nb of nodes in a volume
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static int NbFaces( VolumeType type );
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// return nb of faces by volume type
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static const int* GetFaceNodesIndices(VolumeType type,
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int faceIndex,
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bool external);
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// Return the array of face nodes indices
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// To comfort link iteration, the array
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// length == NbFaceNodes( faceIndex ) + 1 and
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// the last node index == the first one.
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// Nodes at face centers of SMDSEntity_TriQuad_Hexa are ignored
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static int NbFaceNodes(VolumeType type, int faceIndex );
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// Return number of nodes in the array of face nodes
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// Nodes at face centers of SMDSEntity_TriQuad_Hexa are ignored
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static int NbCornerNodes(VolumeType type);
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// Useful to know nb of corner nodes of a quadratic volume
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static int GetOppFaceIndexOfHex( int faceIndex );
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// Return index of the opposite face of the hexahedron
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private:
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bool setFace( int faceIndex ) const;
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bool projectNodesToNormal( int faceIndex, double& minProj, double& maxProj ) const;
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const SMDS_MeshElement* myVolume;
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const SMDS_VtkVolume* myPolyedre;
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bool myIgnoreCentralNodes;
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bool myVolForward;
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int myNbFaces;
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std::vector<const SMDS_MeshNode*> myVolumeNodes;
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std::vector< int > myPolyIndices; // of a myCurFace
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std::vector< int > myPolyQuantities;
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std::vector< int > myPolyFacetOri; // -1-in, +1-out, 0-undef
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typedef std::pair<int,int> Link;
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std::map<Link, int> myFwdLinks; // used in IsFaceExternal() to find out myPolyFacetOri
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mutable bool myExternalFaces;
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mutable const int* myAllFacesNodeIndices_F;
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mutable const int* myAllFacesNodeIndices_RE;
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mutable const int* myAllFacesNbNodes;
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mutable int myMaxFaceNbNodes;
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struct SaveFacet;
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struct Facet
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{
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int myIndex;
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int myNbNodes;
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int* myNodeIndices;
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std::vector<const SMDS_MeshNode*> myNodes;
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};
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mutable Facet myCurFace;
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};
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#endif
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///////////////////////////////////////////////////////////////////////////
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//
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// ORDER OF NODES OF FORWARD ELEMENT
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//
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///////////////////////////////////////////////////////////////////////////
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/*
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// N3
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// +
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// /|\
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// / | \
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// / | \
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// N0 +---|---+ N1 TETRAHEDRON
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// \ | /
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// \ | /
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// \ | /
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// \|/
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// +
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// N2
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// + N4
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// /|\
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// / | \
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// / | \
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// / | \
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// N3 +---------+ N5
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// | | |
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// | + N1 |
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// | / \ | PENTAHEDRON
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// | / \ |
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// | / \ |
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// |/ \|
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// N0 +---------+ N2
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// N5+----------+N6
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// /| /|
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// / | / |
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// / | / |
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// N4+----------+N7 |
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// | | | | HEXAHEDRON
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// | | | |
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// | | | |
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// | N1+------|---+N2
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// | / | /
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// | / | /
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// |/ |/
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// N0+----------+N3
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//
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*/
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