/
SMESH_MeshEditor.cpp
12870 lines (11681 loc) · 484 KB
/
SMESH_MeshEditor.cpp
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// Copyright (C) 2007-2015 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, or (at your option) any later version.
//
// 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_MeshEditor.cxx
// Created : Mon Apr 12 16:10:22 2004
// Author : Edward AGAPOV (eap)
#include "SMESH_MeshEditor.hxx"
#include "SMDS_FaceOfNodes.hxx"
#include "SMDS_VolumeTool.hxx"
#include "SMDS_EdgePosition.hxx"
#include "SMDS_FacePosition.hxx"
#include "SMDS_SpacePosition.hxx"
#include "SMDS_MeshGroup.hxx"
#include "SMDS_LinearEdge.hxx"
#include "SMDS_Downward.hxx"
#include "SMDS_SetIterator.hxx"
#include "SMESHDS_Group.hxx"
#include "SMESHDS_Mesh.hxx"
#include "SMESH_Algo.hxx"
#include "SMESH_ControlsDef.hxx"
#include "SMESH_Group.hxx"
#include "SMESH_MeshAlgos.hxx"
#include "SMESH_MesherHelper.hxx"
#include "SMESH_OctreeNode.hxx"
#include "SMESH_subMesh.hxx"
#include <Basics_OCCTVersion.hxx>
#include "utilities.h"
#include "chrono.hxx"
#include <BRepAdaptor_Surface.hxx>
#include <BRepBuilderAPI_MakeEdge.hxx>
#include <BRepClass3d_SolidClassifier.hxx>
#include <BRep_Tool.hxx>
#include <ElCLib.hxx>
#include <Extrema_GenExtPS.hxx>
#include <Extrema_POnCurv.hxx>
#include <Extrema_POnSurf.hxx>
#include <Geom2d_Curve.hxx>
#include <GeomAdaptor_Surface.hxx>
#include <Geom_Curve.hxx>
#include <Geom_Surface.hxx>
#include <Precision.hxx>
#include <TColStd_ListOfInteger.hxx>
#include <TopAbs_State.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
#include <TopTools_ListIteratorOfListOfShape.hxx>
#include <TopTools_ListOfShape.hxx>
#include <TopTools_SequenceOfShape.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Face.hxx>
#include <TopoDS_Solid.hxx>
#include <gp.hxx>
#include <gp_Ax1.hxx>
#include <gp_Dir.hxx>
#include <gp_Lin.hxx>
#include <gp_Pln.hxx>
#include <gp_Trsf.hxx>
#include <gp_Vec.hxx>
#include <gp_XY.hxx>
#include <gp_XYZ.hxx>
#include <cmath>
#include <map>
#include <set>
#include <numeric>
#include <limits>
#include <algorithm>
#include <sstream>
#include <boost/tuple/tuple.hpp>
#include <Standard_Failure.hxx>
#include <Standard_ErrorHandler.hxx>
#define cast2Node(elem) static_cast<const SMDS_MeshNode*>( elem )
using namespace std;
using namespace SMESH::Controls;
namespace
{
template < class ELEM_SET >
SMDS_ElemIteratorPtr elemSetIterator( const ELEM_SET& elements )
{
typedef SMDS_SetIterator
< SMDS_pElement, typename ELEM_SET::const_iterator> TSetIterator;
return SMDS_ElemIteratorPtr( new TSetIterator( elements.begin(), elements.end() ));
}
}
//=======================================================================
//function : SMESH_MeshEditor
//purpose :
//=======================================================================
SMESH_MeshEditor::SMESH_MeshEditor( SMESH_Mesh* theMesh )
:myMesh( theMesh ) // theMesh may be NULL
{
}
//================================================================================
/*!
* \brief Clears myLastCreatedNodes and myLastCreatedElems
*/
//================================================================================
void SMESH_MeshEditor::ClearLastCreated()
{
myLastCreatedNodes.Clear();
myLastCreatedElems.Clear();
}
//================================================================================
/*!
* \brief Initializes members by an existing element
* \param [in] elem - the source element
* \param [in] basicOnly - if true, does not set additional data of Ball and Polyhedron
*/
//================================================================================
SMESH_MeshEditor::ElemFeatures&
SMESH_MeshEditor::ElemFeatures::Init( const SMDS_MeshElement* elem, bool basicOnly )
{
if ( elem )
{
myType = elem->GetType();
if ( myType == SMDSAbs_Face || myType == SMDSAbs_Volume )
{
myIsPoly = elem->IsPoly();
if ( myIsPoly )
{
myIsQuad = elem->IsQuadratic();
if ( myType == SMDSAbs_Volume && !basicOnly )
{
vector<int > quant = static_cast<const SMDS_VtkVolume* >( elem )->GetQuantities();
myPolyhedQuantities.swap( quant );
}
}
}
else if ( myType == SMDSAbs_Ball && !basicOnly )
{
myBallDiameter = static_cast<const SMDS_BallElement*>(elem)->GetDiameter();
}
}
return *this;
}
//=======================================================================
/*!
* \brief Add element
*/
//=======================================================================
SMDS_MeshElement*
SMESH_MeshEditor::AddElement(const vector<const SMDS_MeshNode*> & node,
const ElemFeatures& features)
{
SMDS_MeshElement* e = 0;
int nbnode = node.size();
SMESHDS_Mesh* mesh = GetMeshDS();
const int ID = features.myID;
switch ( features.myType ) {
case SMDSAbs_Face:
if ( !features.myIsPoly ) {
if (nbnode == 3) {
if ( ID >= 1 ) e = mesh->AddFaceWithID(node[0], node[1], node[2], ID);
else e = mesh->AddFace (node[0], node[1], node[2] );
}
else if (nbnode == 4) {
if ( ID >= 1 ) e = mesh->AddFaceWithID(node[0], node[1], node[2], node[3], ID);
else e = mesh->AddFace (node[0], node[1], node[2], node[3] );
}
else if (nbnode == 6) {
if ( ID >= 1 ) e = mesh->AddFaceWithID(node[0], node[1], node[2], node[3],
node[4], node[5], ID);
else e = mesh->AddFace (node[0], node[1], node[2], node[3],
node[4], node[5] );
}
else if (nbnode == 7) {
if ( ID >= 1 ) e = mesh->AddFaceWithID(node[0], node[1], node[2], node[3],
node[4], node[5], node[6], ID);
else e = mesh->AddFace (node[0], node[1], node[2], node[3],
node[4], node[5], node[6] );
}
else if (nbnode == 8) {
if ( ID >= 1 ) e = mesh->AddFaceWithID(node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7], ID);
else e = mesh->AddFace (node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7] );
}
else if (nbnode == 9) {
if ( ID >= 1 ) e = mesh->AddFaceWithID(node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7], node[8], ID);
else e = mesh->AddFace (node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7], node[8] );
}
}
else if ( !features.myIsQuad )
{
if ( ID >= 1 ) e = mesh->AddPolygonalFaceWithID(node, ID);
else e = mesh->AddPolygonalFace (node );
}
else if ( nbnode % 2 == 0 ) // just a protection
{
if ( ID >= 1 ) e = mesh->AddQuadPolygonalFaceWithID(node, ID);
else e = mesh->AddQuadPolygonalFace (node );
}
break;
case SMDSAbs_Volume:
if ( !features.myIsPoly ) {
if (nbnode == 4) {
if ( ID >= 1 ) e = mesh->AddVolumeWithID(node[0], node[1], node[2], node[3], ID);
else e = mesh->AddVolume (node[0], node[1], node[2], node[3] );
}
else if (nbnode == 5) {
if ( ID >= 1 ) e = mesh->AddVolumeWithID(node[0], node[1], node[2], node[3],
node[4], ID);
else e = mesh->AddVolume (node[0], node[1], node[2], node[3],
node[4] );
}
else if (nbnode == 6) {
if ( ID >= 1 ) e = mesh->AddVolumeWithID(node[0], node[1], node[2], node[3],
node[4], node[5], ID);
else e = mesh->AddVolume (node[0], node[1], node[2], node[3],
node[4], node[5] );
}
else if (nbnode == 8) {
if ( ID >= 1 ) e = mesh->AddVolumeWithID(node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7], ID);
else e = mesh->AddVolume (node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7] );
}
else if (nbnode == 10) {
if ( ID >= 1 ) e = mesh->AddVolumeWithID(node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7],
node[8], node[9], ID);
else e = mesh->AddVolume (node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7],
node[8], node[9] );
}
else if (nbnode == 12) {
if ( ID >= 1 ) e = mesh->AddVolumeWithID(node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7],
node[8], node[9], node[10], node[11], ID);
else e = mesh->AddVolume (node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7],
node[8], node[9], node[10], node[11] );
}
else if (nbnode == 13) {
if ( ID >= 1 ) e = mesh->AddVolumeWithID(node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7],
node[8], node[9], node[10],node[11],
node[12],ID);
else e = mesh->AddVolume (node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7],
node[8], node[9], node[10],node[11],
node[12] );
}
else if (nbnode == 15) {
if ( ID >= 1 ) e = mesh->AddVolumeWithID(node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7],
node[8], node[9], node[10],node[11],
node[12],node[13],node[14],ID);
else e = mesh->AddVolume (node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7],
node[8], node[9], node[10],node[11],
node[12],node[13],node[14] );
}
else if (nbnode == 20) {
if ( ID >= 1 ) e = mesh->AddVolumeWithID(node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7],
node[8], node[9], node[10],node[11],
node[12],node[13],node[14],node[15],
node[16],node[17],node[18],node[19],ID);
else e = mesh->AddVolume (node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7],
node[8], node[9], node[10],node[11],
node[12],node[13],node[14],node[15],
node[16],node[17],node[18],node[19] );
}
else if (nbnode == 27) {
if ( ID >= 1 ) e = mesh->AddVolumeWithID(node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7],
node[8], node[9], node[10],node[11],
node[12],node[13],node[14],node[15],
node[16],node[17],node[18],node[19],
node[20],node[21],node[22],node[23],
node[24],node[25],node[26], ID);
else e = mesh->AddVolume (node[0], node[1], node[2], node[3],
node[4], node[5], node[6], node[7],
node[8], node[9], node[10],node[11],
node[12],node[13],node[14],node[15],
node[16],node[17],node[18],node[19],
node[20],node[21],node[22],node[23],
node[24],node[25],node[26] );
}
}
else if ( !features.myIsQuad )
{
if ( ID >= 1 ) e = mesh->AddPolyhedralVolumeWithID(node, features.myPolyhedQuantities, ID);
else e = mesh->AddPolyhedralVolume (node, features.myPolyhedQuantities );
}
else
{
// if ( ID >= 1 ) e = mesh->AddQuadPolyhedralVolumeWithID(node, features.myPolyhedQuantities,ID);
// else e = mesh->AddQuadPolyhedralVolume (node, features.myPolyhedQuantities );
}
break;
case SMDSAbs_Edge:
if ( nbnode == 2 ) {
if ( ID >= 1 ) e = mesh->AddEdgeWithID(node[0], node[1], ID);
else e = mesh->AddEdge (node[0], node[1] );
}
else if ( nbnode == 3 ) {
if ( ID >= 1 ) e = mesh->AddEdgeWithID(node[0], node[1], node[2], ID);
else e = mesh->AddEdge (node[0], node[1], node[2] );
}
break;
case SMDSAbs_0DElement:
if ( nbnode == 1 ) {
if ( ID >= 1 ) e = mesh->Add0DElementWithID(node[0], ID);
else e = mesh->Add0DElement (node[0] );
}
break;
case SMDSAbs_Node:
if ( ID >= 1 ) e = mesh->AddNodeWithID(node[0]->X(), node[0]->Y(), node[0]->Z(), ID);
else e = mesh->AddNode (node[0]->X(), node[0]->Y(), node[0]->Z() );
break;
case SMDSAbs_Ball:
if ( ID >= 1 ) e = mesh->AddBallWithID(node[0], features.myBallDiameter, ID);
else e = mesh->AddBall (node[0], features.myBallDiameter );
break;
default:;
}
if ( e ) myLastCreatedElems.Append( e );
return e;
}
//=======================================================================
/*!
* \brief Add element
*/
//=======================================================================
SMDS_MeshElement* SMESH_MeshEditor::AddElement(const vector<int> & nodeIDs,
const ElemFeatures& features)
{
vector<const SMDS_MeshNode*> nodes;
nodes.reserve( nodeIDs.size() );
vector<int>::const_iterator id = nodeIDs.begin();
while ( id != nodeIDs.end() ) {
if ( const SMDS_MeshNode* node = GetMeshDS()->FindNode( *id++ ))
nodes.push_back( node );
else
return 0;
}
return AddElement( nodes, features );
}
//=======================================================================
//function : Remove
//purpose : Remove a node or an element.
// Modify a compute state of sub-meshes which become empty
//=======================================================================
int SMESH_MeshEditor::Remove (const list< int >& theIDs,
const bool isNodes )
{
myLastCreatedElems.Clear();
myLastCreatedNodes.Clear();
SMESHDS_Mesh* aMesh = GetMeshDS();
set< SMESH_subMesh *> smmap;
int removed = 0;
list<int>::const_iterator it = theIDs.begin();
for ( ; it != theIDs.end(); it++ ) {
const SMDS_MeshElement * elem;
if ( isNodes )
elem = aMesh->FindNode( *it );
else
elem = aMesh->FindElement( *it );
if ( !elem )
continue;
// Notify VERTEX sub-meshes about modification
if ( isNodes ) {
const SMDS_MeshNode* node = cast2Node( elem );
if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX )
if ( int aShapeID = node->getshapeId() )
if ( SMESH_subMesh * sm = GetMesh()->GetSubMeshContaining( aShapeID ) )
smmap.insert( sm );
}
// Find sub-meshes to notify about modification
// SMDS_ElemIteratorPtr nodeIt = elem->nodesIterator();
// while ( nodeIt->more() ) {
// const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
// const SMDS_PositionPtr& aPosition = node->GetPosition();
// if ( aPosition.get() ) {
// if ( int aShapeID = aPosition->GetShapeId() ) {
// if ( SMESH_subMesh * sm = GetMesh()->GetSubMeshContaining( aShapeID ) )
// smmap.insert( sm );
// }
// }
// }
// Do remove
if ( isNodes )
aMesh->RemoveNode( static_cast< const SMDS_MeshNode* >( elem ));
else
aMesh->RemoveElement( elem );
removed++;
}
// Notify sub-meshes about modification
if ( !smmap.empty() ) {
set< SMESH_subMesh *>::iterator smIt;
for ( smIt = smmap.begin(); smIt != smmap.end(); smIt++ )
(*smIt)->ComputeStateEngine( SMESH_subMesh::MESH_ENTITY_REMOVED );
}
// // Check if the whole mesh becomes empty
// if ( SMESH_subMesh * sm = GetMesh()->GetSubMeshContaining( 1 ) )
// sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
return removed;
}
//================================================================================
/*!
* \brief Create 0D elements on all nodes of the given object except those
* nodes on which a 0D element already exists.
* \param elements - Elements on whose nodes to create 0D elements; if empty,
* the all mesh is treated
* \param all0DElems - returns all 0D elements found or created on nodes of \a elements
*/
//================================================================================
void SMESH_MeshEditor::Create0DElementsOnAllNodes( const TIDSortedElemSet& elements,
TIDSortedElemSet& all0DElems )
{
SMDS_ElemIteratorPtr elemIt;
vector< const SMDS_MeshElement* > allNodes;
if ( elements.empty() )
{
allNodes.reserve( GetMeshDS()->NbNodes() );
elemIt = GetMeshDS()->elementsIterator( SMDSAbs_Node );
while ( elemIt->more() )
allNodes.push_back( elemIt->next() );
elemIt = elemSetIterator( allNodes );
}
else
{
elemIt = elemSetIterator( elements );
}
while ( elemIt->more() )
{
const SMDS_MeshElement* e = elemIt->next();
SMDS_ElemIteratorPtr nodeIt = e->nodesIterator();
while ( nodeIt->more() )
{
const SMDS_MeshNode* n = cast2Node( nodeIt->next() );
SMDS_ElemIteratorPtr it0D = n->GetInverseElementIterator( SMDSAbs_0DElement );
if ( it0D->more() )
all0DElems.insert( it0D->next() );
else {
myLastCreatedElems.Append( GetMeshDS()->Add0DElement( n ));
all0DElems.insert( myLastCreatedElems.Last() );
}
}
}
}
//=======================================================================
//function : FindShape
//purpose : Return an index of the shape theElem is on
// or zero if a shape not found
//=======================================================================
int SMESH_MeshEditor::FindShape (const SMDS_MeshElement * theElem)
{
myLastCreatedElems.Clear();
myLastCreatedNodes.Clear();
SMESHDS_Mesh * aMesh = GetMeshDS();
if ( aMesh->ShapeToMesh().IsNull() )
return 0;
int aShapeID = theElem->getshapeId();
if ( aShapeID < 1 )
return 0;
if ( SMESHDS_SubMesh * sm = aMesh->MeshElements( aShapeID ))
if ( sm->Contains( theElem ))
return aShapeID;
if ( theElem->GetType() == SMDSAbs_Node ) {
MESSAGE( ":( Error: invalid myShapeId of node " << theElem->GetID() );
}
else {
MESSAGE( ":( Error: invalid myShapeId of element " << theElem->GetID() );
}
TopoDS_Shape aShape; // the shape a node of theElem is on
if ( theElem->GetType() != SMDSAbs_Node )
{
SMDS_ElemIteratorPtr nodeIt = theElem->nodesIterator();
while ( nodeIt->more() ) {
const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
if ((aShapeID = node->getshapeId()) > 0) {
if ( SMESHDS_SubMesh * sm = aMesh->MeshElements( aShapeID ) ) {
if ( sm->Contains( theElem ))
return aShapeID;
if ( aShape.IsNull() )
aShape = aMesh->IndexToShape( aShapeID );
}
}
}
}
// None of nodes is on a proper shape,
// find the shape among ancestors of aShape on which a node is
if ( !aShape.IsNull() ) {
TopTools_ListIteratorOfListOfShape ancIt( GetMesh()->GetAncestors( aShape ));
for ( ; ancIt.More(); ancIt.Next() ) {
SMESHDS_SubMesh * sm = aMesh->MeshElements( ancIt.Value() );
if ( sm && sm->Contains( theElem ))
return aMesh->ShapeToIndex( ancIt.Value() );
}
}
else
{
SMESHDS_SubMeshIteratorPtr smIt = GetMeshDS()->SubMeshes();
while ( const SMESHDS_SubMesh* sm = smIt->next() )
if ( sm->Contains( theElem ))
return sm->GetID();
}
return 0;
}
//=======================================================================
//function : IsMedium
//purpose :
//=======================================================================
bool SMESH_MeshEditor::IsMedium(const SMDS_MeshNode* node,
const SMDSAbs_ElementType typeToCheck)
{
bool isMedium = false;
SMDS_ElemIteratorPtr it = node->GetInverseElementIterator(typeToCheck);
while (it->more() && !isMedium ) {
const SMDS_MeshElement* elem = it->next();
isMedium = elem->IsMediumNode(node);
}
return isMedium;
}
//=======================================================================
//function : shiftNodesQuadTria
//purpose : Shift nodes in the array corresponded to quadratic triangle
// example: (0,1,2,3,4,5) -> (1,2,0,4,5,3)
//=======================================================================
static void shiftNodesQuadTria(vector< const SMDS_MeshNode* >& aNodes)
{
const SMDS_MeshNode* nd1 = aNodes[0];
aNodes[0] = aNodes[1];
aNodes[1] = aNodes[2];
aNodes[2] = nd1;
const SMDS_MeshNode* nd2 = aNodes[3];
aNodes[3] = aNodes[4];
aNodes[4] = aNodes[5];
aNodes[5] = nd2;
}
//=======================================================================
//function : nbEdgeConnectivity
//purpose : return number of the edges connected with the theNode.
// if theEdges has connections with the other type of the
// elements, return -1
//=======================================================================
static int nbEdgeConnectivity(const SMDS_MeshNode* theNode)
{
// SMDS_ElemIteratorPtr elemIt = theNode->GetInverseElementIterator();
// int nb=0;
// while(elemIt->more()) {
// elemIt->next();
// nb++;
// }
// return nb;
return theNode->NbInverseElements();
}
//=======================================================================
//function : getNodesFromTwoTria
//purpose :
//=======================================================================
static bool getNodesFromTwoTria(const SMDS_MeshElement * theTria1,
const SMDS_MeshElement * theTria2,
vector< const SMDS_MeshNode*>& N1,
vector< const SMDS_MeshNode*>& N2)
{
N1.assign( theTria1->begin_nodes(), theTria1->end_nodes() );
if ( N1.size() < 6 ) return false;
N2.assign( theTria2->begin_nodes(), theTria2->end_nodes() );
if ( N2.size() < 6 ) return false;
int sames[3] = {-1,-1,-1};
int nbsames = 0;
int i, j;
for(i=0; i<3; i++) {
for(j=0; j<3; j++) {
if(N1[i]==N2[j]) {
sames[i] = j;
nbsames++;
break;
}
}
}
if(nbsames!=2) return false;
if(sames[0]>-1) {
shiftNodesQuadTria(N1);
if(sames[1]>-1) {
shiftNodesQuadTria(N1);
}
}
i = sames[0] + sames[1] + sames[2];
for(; i<2; i++) {
shiftNodesQuadTria(N2);
}
// now we receive following N1 and N2 (using numeration as in the image below)
// tria1 : (1 2 4 5 9 7) and tria2 : (3 4 2 8 9 6)
// i.e. first nodes from both arrays form a new diagonal
return true;
}
//=======================================================================
//function : InverseDiag
//purpose : Replace two neighbour triangles with ones built on the same 4 nodes
// but having other common link.
// Return False if args are improper
//=======================================================================
bool SMESH_MeshEditor::InverseDiag (const SMDS_MeshElement * theTria1,
const SMDS_MeshElement * theTria2 )
{
MESSAGE("InverseDiag");
myLastCreatedElems.Clear();
myLastCreatedNodes.Clear();
if (!theTria1 || !theTria2)
return false;
const SMDS_VtkFace* F1 = dynamic_cast<const SMDS_VtkFace*>( theTria1 );
if (!F1) return false;
const SMDS_VtkFace* F2 = dynamic_cast<const SMDS_VtkFace*>( theTria2 );
if (!F2) return false;
if ((theTria1->GetEntityType() == SMDSEntity_Triangle) &&
(theTria2->GetEntityType() == SMDSEntity_Triangle)) {
// 1 +--+ A theTria1: ( 1 A B ) A->2 ( 1 2 B ) 1 +--+ A
// | /| theTria2: ( B A 2 ) B->1 ( 1 A 2 ) |\ |
// |/ | | \|
// B +--+ 2 B +--+ 2
// put nodes in array and find out indices of the same ones
const SMDS_MeshNode* aNodes [6];
int sameInd [] = { -1, -1, -1, -1, -1, -1 };
int i = 0;
SMDS_ElemIteratorPtr it = theTria1->nodesIterator();
while ( it->more() ) {
aNodes[ i ] = static_cast<const SMDS_MeshNode*>( it->next() );
if ( i > 2 ) // theTria2
// find same node of theTria1
for ( int j = 0; j < 3; j++ )
if ( aNodes[ i ] == aNodes[ j ]) {
sameInd[ j ] = i;
sameInd[ i ] = j;
break;
}
// next
i++;
if ( i == 3 ) {
if ( it->more() )
return false; // theTria1 is not a triangle
it = theTria2->nodesIterator();
}
if ( i == 6 && it->more() )
return false; // theTria2 is not a triangle
}
// find indices of 1,2 and of A,B in theTria1
int iA = -1, iB = 0, i1 = 0, i2 = 0;
for ( i = 0; i < 6; i++ ) {
if ( sameInd [ i ] == -1 ) {
if ( i < 3 ) i1 = i;
else i2 = i;
}
else if (i < 3) {
if ( iA >= 0) iB = i;
else iA = i;
}
}
// nodes 1 and 2 should not be the same
if ( aNodes[ i1 ] == aNodes[ i2 ] )
return false;
// theTria1: A->2
aNodes[ iA ] = aNodes[ i2 ];
// theTria2: B->1
aNodes[ sameInd[ iB ]] = aNodes[ i1 ];
GetMeshDS()->ChangeElementNodes( theTria1, aNodes, 3 );
GetMeshDS()->ChangeElementNodes( theTria2, &aNodes[ 3 ], 3 );
return true;
} // end if(F1 && F2)
// check case of quadratic faces
if (theTria1->GetEntityType() != SMDSEntity_Quad_Triangle &&
theTria1->GetEntityType() != SMDSEntity_BiQuad_Triangle)
return false;
if (theTria2->GetEntityType() != SMDSEntity_Quad_Triangle&&
theTria2->GetEntityType() != SMDSEntity_BiQuad_Triangle)
return false;
// 5
// 1 +--+--+ 2 theTria1: (1 2 4 5 9 7) or (2 4 1 9 7 5) or (4 1 2 7 5 9)
// | /| theTria2: (2 3 4 6 8 9) or (3 4 2 8 9 6) or (4 2 3 9 6 8)
// | / |
// 7 + + + 6
// | /9 |
// |/ |
// 4 +--+--+ 3
// 8
vector< const SMDS_MeshNode* > N1;
vector< const SMDS_MeshNode* > N2;
if(!getNodesFromTwoTria(theTria1,theTria2,N1,N2))
return false;
// now we receive following N1 and N2 (using numeration as above image)
// tria1 : (1 2 4 5 9 7) and tria2 : (3 4 2 8 9 6)
// i.e. first nodes from both arrays determ new diagonal
vector< const SMDS_MeshNode*> N1new( N1.size() );
vector< const SMDS_MeshNode*> N2new( N2.size() );
N1new.back() = N1.back(); // central node of biquadratic
N2new.back() = N2.back();
N1new[0] = N1[0]; N2new[0] = N1[0];
N1new[1] = N2[0]; N2new[1] = N1[1];
N1new[2] = N2[1]; N2new[2] = N2[0];
N1new[3] = N1[4]; N2new[3] = N1[3];
N1new[4] = N2[3]; N2new[4] = N2[5];
N1new[5] = N1[5]; N2new[5] = N1[4];
// change nodes in faces
GetMeshDS()->ChangeElementNodes( theTria1, &N1new[0], N1new.size() );
GetMeshDS()->ChangeElementNodes( theTria2, &N2new[0], N2new.size() );
// move the central node of biquadratic triangle
SMESH_MesherHelper helper( *GetMesh() );
for ( int is2nd = 0; is2nd < 2; ++is2nd )
{
const SMDS_MeshElement* tria = is2nd ? theTria2 : theTria1;
vector< const SMDS_MeshNode*>& nodes = is2nd ? N2new : N1new;
if ( nodes.size() < 7 )
continue;
helper.SetSubShape( tria->getshapeId() );
const TopoDS_Face& F = TopoDS::Face( helper.GetSubShape() );
gp_Pnt xyz;
if ( F.IsNull() )
{
xyz = ( SMESH_TNodeXYZ( nodes[3] ) +
SMESH_TNodeXYZ( nodes[4] ) +
SMESH_TNodeXYZ( nodes[5] )) / 3.;
}
else
{
bool checkUV;
gp_XY uv = ( helper.GetNodeUV( F, nodes[3], nodes[2], &checkUV ) +
helper.GetNodeUV( F, nodes[4], nodes[0], &checkUV ) +
helper.GetNodeUV( F, nodes[5], nodes[1], &checkUV )) / 3.;
TopLoc_Location loc;
Handle(Geom_Surface) S = BRep_Tool::Surface(F,loc);
xyz = S->Value( uv.X(), uv.Y() );
xyz.Transform( loc );
if ( nodes[6]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE && // set UV
nodes[6]->getshapeId() > 0 )
GetMeshDS()->SetNodeOnFace( nodes[6], nodes[6]->getshapeId(), uv.X(), uv.Y() );
}
GetMeshDS()->MoveNode( nodes[6], xyz.X(), xyz.Y(), xyz.Z() );
}
return true;
}
//=======================================================================
//function : findTriangles
//purpose : find triangles sharing theNode1-theNode2 link
//=======================================================================
static bool findTriangles(const SMDS_MeshNode * theNode1,
const SMDS_MeshNode * theNode2,
const SMDS_MeshElement*& theTria1,
const SMDS_MeshElement*& theTria2)
{
if ( !theNode1 || !theNode2 ) return false;
theTria1 = theTria2 = 0;
set< const SMDS_MeshElement* > emap;
SMDS_ElemIteratorPtr it = theNode1->GetInverseElementIterator(SMDSAbs_Face);
while (it->more()) {
const SMDS_MeshElement* elem = it->next();
if ( elem->NbCornerNodes() == 3 )
emap.insert( elem );
}
it = theNode2->GetInverseElementIterator(SMDSAbs_Face);
while (it->more()) {
const SMDS_MeshElement* elem = it->next();
if ( emap.count( elem )) {
if ( !theTria1 )
{
theTria1 = elem;
}
else
{
theTria2 = elem;
// theTria1 must be element with minimum ID
if ( theTria2->GetID() < theTria1->GetID() )
std::swap( theTria2, theTria1 );
return true;
}
}
}
return false;
}
//=======================================================================
//function : InverseDiag
//purpose : Replace two neighbour triangles sharing theNode1-theNode2 link
// with ones built on the same 4 nodes but having other common link.
// Return false if proper faces not found
//=======================================================================
bool SMESH_MeshEditor::InverseDiag (const SMDS_MeshNode * theNode1,
const SMDS_MeshNode * theNode2)
{
myLastCreatedElems.Clear();
myLastCreatedNodes.Clear();
MESSAGE( "::InverseDiag()" );
const SMDS_MeshElement *tr1, *tr2;
if ( !findTriangles( theNode1, theNode2, tr1, tr2 ))
return false;
const SMDS_VtkFace* F1 = dynamic_cast<const SMDS_VtkFace*>( tr1 );
if (!F1) return false;
const SMDS_VtkFace* F2 = dynamic_cast<const SMDS_VtkFace*>( tr2 );
if (!F2) return false;
if ((tr1->GetEntityType() == SMDSEntity_Triangle) &&
(tr2->GetEntityType() == SMDSEntity_Triangle)) {
// 1 +--+ A tr1: ( 1 A B ) A->2 ( 1 2 B ) 1 +--+ A
// | /| tr2: ( B A 2 ) B->1 ( 1 A 2 ) |\ |
// |/ | | \|
// B +--+ 2 B +--+ 2
// put nodes in array
// and find indices of 1,2 and of A in tr1 and of B in tr2
int i, iA1 = 0, i1 = 0;
const SMDS_MeshNode* aNodes1 [3];
SMDS_ElemIteratorPtr it;
for (i = 0, it = tr1->nodesIterator(); it->more(); i++ ) {
aNodes1[ i ] = static_cast<const SMDS_MeshNode*>( it->next() );
if ( aNodes1[ i ] == theNode1 )
iA1 = i; // node A in tr1
else if ( aNodes1[ i ] != theNode2 )
i1 = i; // node 1
}
int iB2 = 0, i2 = 0;
const SMDS_MeshNode* aNodes2 [3];
for (i = 0, it = tr2->nodesIterator(); it->more(); i++ ) {
aNodes2[ i ] = static_cast<const SMDS_MeshNode*>( it->next() );
if ( aNodes2[ i ] == theNode2 )
iB2 = i; // node B in tr2
else if ( aNodes2[ i ] != theNode1 )
i2 = i; // node 2
}
// nodes 1 and 2 should not be the same
if ( aNodes1[ i1 ] == aNodes2[ i2 ] )
return false;
// tr1: A->2
aNodes1[ iA1 ] = aNodes2[ i2 ];
// tr2: B->1
aNodes2[ iB2 ] = aNodes1[ i1 ];
GetMeshDS()->ChangeElementNodes( tr1, aNodes1, 3 );
GetMeshDS()->ChangeElementNodes( tr2, aNodes2, 3 );
return true;
}
// check case of quadratic faces
return InverseDiag(tr1,tr2);
}
//=======================================================================
//function : getQuadrangleNodes
//purpose : fill theQuadNodes - nodes of a quadrangle resulting from
// fusion of triangles tr1 and tr2 having shared link on
// theNode1 and theNode2
//=======================================================================
bool getQuadrangleNodes(const SMDS_MeshNode * theQuadNodes [],
const SMDS_MeshNode * theNode1,
const SMDS_MeshNode * theNode2,
const SMDS_MeshElement * tr1,
const SMDS_MeshElement * tr2 )
{
if( tr1->NbNodes() != tr2->NbNodes() )
return false;
// find the 4-th node to insert into tr1
const SMDS_MeshNode* n4 = 0;
SMDS_ElemIteratorPtr it = tr2->nodesIterator();
int i=0;
while ( !n4 && i<3 ) {
const SMDS_MeshNode * n = cast2Node( it->next() );
i++;
bool isDiag = ( n == theNode1 || n == theNode2 );
if ( !isDiag )
n4 = n;
}
// Make an array of nodes to be in a quadrangle
int iNode = 0, iFirstDiag = -1;
it = tr1->nodesIterator();
i=0;
while ( i<3 ) {
const SMDS_MeshNode * n = cast2Node( it->next() );
i++;
bool isDiag = ( n == theNode1 || n == theNode2 );
if ( isDiag ) {
if ( iFirstDiag < 0 )
iFirstDiag = iNode;
else if ( iNode - iFirstDiag == 1 )
theQuadNodes[ iNode++ ] = n4; // insert the 4-th node between diagonal nodes
}
else if ( n == n4 ) {
return false; // tr1 and tr2 should not have all the same nodes
}
theQuadNodes[ iNode++ ] = n;
}
if ( iNode == 3 ) // diagonal nodes have 0 and 2 indices
theQuadNodes[ iNode ] = n4;
return true;
}