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smesh/src/StdMeshers/StdMeshers_Helper.cxx

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// File: StdMeshers_Helper.cxx
// Created: 15.02.06 15:22:41
// Author: Sergey KUUL
// Copyright: Open CASCADE 2006
#include "StdMeshers_Helper.hxx"
#include "SMDS_FacePosition.hxx"
#include "SMDS_EdgePosition.hxx"
#include "SMESH_subMesh.hxx"
#include "SMESH_MeshEditor.hxx"
#include <BRepAdaptor_Surface.hxx>
#include <BRepTools.hxx>
#include <BRep_Tool.hxx>
#include <Geom2d_Curve.hxx>
#include <Geom_Curve.hxx>
#include <Geom_Surface.hxx>
#include <TopExp_Explorer.hxx>
#include <TopTools_MapOfShape.hxx>
#include <gp_Pnt2d.hxx>
//=======================================================================
//function : CheckShape
//purpose :
//=======================================================================
bool StdMeshers_Helper::IsQuadraticSubMesh(const TopoDS_Shape& aSh)
{
SMESHDS_Mesh* meshDS = GetMesh()->GetMeshDS();
myShapeID = meshDS->ShapeToIndex(aSh);
// we can create quadratic elements only if all elements
// created on subshapes of given shape are quadratic
// also we have to fill myNLinkNodeMap
myCreateQuadratic = true;
mySeamShapeIds.clear();
TopAbs_ShapeEnum subType( aSh.ShapeType()==TopAbs_FACE ? TopAbs_EDGE : TopAbs_FACE );
SMDSAbs_ElementType elemType( subType==TopAbs_FACE ? SMDSAbs_Face : SMDSAbs_Edge );
TopExp_Explorer exp( aSh, subType );
for (; exp.More() && myCreateQuadratic; exp.Next()) {
if ( SMESHDS_SubMesh * subMesh = meshDS->MeshElements( exp.Current() )) {
if ( SMDS_ElemIteratorPtr it = subMesh->GetElements() ) {
while(it->more()) {
const SMDS_MeshElement* e = it->next();
if ( e->GetType() != elemType || !e->IsQuadratic() ) {
myCreateQuadratic = false;
break;
}
else {
// fill NLinkNodeMap
switch ( e->NbNodes() ) {
case 3:
AddNLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(2)); break;
case 6:
AddNLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(3));
AddNLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(4));
AddNLinkNode(e->GetNode(2),e->GetNode(0),e->GetNode(5)); break;
case 8:
AddNLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(4));
AddNLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(5));
AddNLinkNode(e->GetNode(2),e->GetNode(3),e->GetNode(6));
AddNLinkNode(e->GetNode(3),e->GetNode(0),e->GetNode(7));
break;
default:
myCreateQuadratic = false;
break;
}
}
}
}
}
}
if(!myCreateQuadratic) {
myNLinkNodeMap.clear();
}
else {
// treatment of periodic faces
if ( aSh.ShapeType() == TopAbs_FACE ) {
const TopoDS_Face& face = TopoDS::Face( aSh );
BRepAdaptor_Surface surface( face );
if ( surface.IsUPeriodic() || surface.IsVPeriodic() ) {
// look for a seam edge
for ( exp.Init( face, TopAbs_EDGE ); exp.More(); exp.Next()) {
const TopoDS_Edge& edge = TopoDS::Edge( exp.Current() );
if ( BRep_Tool::IsClosed( edge, face )) {
// initialize myPar1, myPar2 and myParIndex
if ( mySeamShapeIds.empty() ) {
gp_Pnt2d uv1, uv2;
BRep_Tool::UVPoints( edge, face, uv1, uv2 );
if ( Abs( uv1.Coord(1) - uv2.Coord(1) ) < Abs( uv1.Coord(2) - uv2.Coord(2) ))
{
myParIndex = 1; // U periodic
myPar1 = surface.FirstUParameter();
myPar2 = surface.LastUParameter();
}
else {
myParIndex = 2; // V periodic
myPar1 = surface.FirstVParameter();
myPar2 = surface.LastVParameter();
}
}
// store shapes indices
mySeamShapeIds.insert( meshDS->ShapeToIndex( exp.Current() ));
for ( TopExp_Explorer v( exp.Current(), TopAbs_VERTEX ); v.More(); v.Next() )
mySeamShapeIds.insert( meshDS->ShapeToIndex( v.Current() ));
}
}
}
}
}
return myCreateQuadratic;
}
//=======================================================================
//function : IsMedium
//purpose :
//=======================================================================
bool StdMeshers_Helper::IsMedium(const SMDS_MeshNode* node,
const SMDSAbs_ElementType typeToCheck)
{
return SMESH_MeshEditor::IsMedium( node, typeToCheck );
}
//=======================================================================
//function : AddNLinkNode
//purpose :
//=======================================================================
/*!
* Auxilary function for filling myNLinkNodeMap
*/
void StdMeshers_Helper::AddNLinkNode(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
const SMDS_MeshNode* n12)
{
NLink link( n1, n2 );
if ( n1 > n2 ) link = NLink( n2, n1 );
// add new record to map
myNLinkNodeMap.insert( make_pair(link,n12));
}
//=======================================================================
/*!
* \brief Select UV on either of 2 pcurves of a seam edge, closest to the given UV
* \param uv1 - UV on the seam
* \param uv2 - UV within a face
* \retval gp_Pnt2d - selected UV
*/
//=======================================================================
gp_Pnt2d StdMeshers_Helper::GetUVOnSeam( const gp_Pnt2d& uv1, const gp_Pnt2d& uv2 ) const
{
double p1 = uv1.Coord( myParIndex );
double p2 = uv2.Coord( myParIndex );
double p3 = ( Abs( p1 - myPar1 ) < Abs( p1 - myPar2 )) ? myPar2 : myPar1;
if ( Abs( p2 - p1 ) > Abs( p2 - p3 ))
p1 = p3;
gp_Pnt2d result = uv1;
result.SetCoord( myParIndex, p1 );
return result;
}
//=======================================================================
/*!
* \brief Return node UV on face
* \param F - the face
* \param n - the node
* \param n2 - a medium node will be placed between n and n2
* \retval gp_XY - resulting UV
*
* Auxilary function called form GetMediumNode()
*/
//=======================================================================
gp_XY StdMeshers_Helper::GetNodeUV(const TopoDS_Face& F,
const SMDS_MeshNode* n,
const SMDS_MeshNode* n2)
{
gp_Pnt2d uv;
const SMDS_PositionPtr Pos = n->GetPosition();
if(Pos->GetTypeOfPosition()==SMDS_TOP_FACE) {
// node has position on face
const SMDS_FacePosition* fpos =
static_cast<const SMDS_FacePosition*>(n->GetPosition().get());
uv = gp_Pnt2d(fpos->GetUParameter(),fpos->GetVParameter());
}
else if(Pos->GetTypeOfPosition()==SMDS_TOP_EDGE) {
// node has position on edge => it is needed to find
// corresponding edge from face, get pcurve for this
// edge and recieve value from this pcurve
const SMDS_EdgePosition* epos =
static_cast<const SMDS_EdgePosition*>(n->GetPosition().get());
SMESHDS_Mesh* meshDS = GetMesh()->GetMeshDS();
int edgeID = Pos->GetShapeId();
TopoDS_Edge E = TopoDS::Edge(meshDS->IndexToShape(edgeID));
double f, l;
TopLoc_Location loc;
Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, F, f, l);
uv = C2d->Value( epos->GetUParameter() );
// for a node on a seam edge select one of UVs on 2 pcurves
if ( n2 && mySeamShapeIds.find( edgeID ) != mySeamShapeIds.end() )
uv = GetUVOnSeam( uv, GetNodeUV( F, n2, 0 ));
}
else if(Pos->GetTypeOfPosition()==SMDS_TOP_VERTEX) {
SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
int vertexID = n->GetPosition()->GetShapeId();
const TopoDS_Vertex& V = TopoDS::Vertex(meshDS->IndexToShape(vertexID));
uv = BRep_Tool::Parameters( V, F );
if ( n2 && mySeamShapeIds.find( vertexID ) != mySeamShapeIds.end() )
uv = GetUVOnSeam( uv, GetNodeUV( F, n2, 0 ));
}
return uv.XY();
}
//=======================================================================
//function : GetMediumNode
//purpose :
//=======================================================================
/*!
* Special function for search or creation medium node
*/
const SMDS_MeshNode* StdMeshers_Helper::GetMediumNode(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
const bool force3d)
{
//cout<<"n1: "<<n1;
//cout<<"n2: "<<n2;
NLink link(( n1 < n2 ? n1 : n2 ), ( n1 < n2 ? n2 : n1 ));
ItNLinkNode itLN = myNLinkNodeMap.find( link );
if ( itLN != myNLinkNodeMap.end() ) {
return (*itLN).second;
}
else {
// create medium node
SMDS_MeshNode* n12;
SMESHDS_Mesh* meshDS = GetMesh()->GetMeshDS();
if(!force3d) {
// we try to create medium node using UV parameters of
// nodes, else - medium between corresponding 3d points
const SMDS_PositionPtr Pos1 = n1->GetPosition();
const SMDS_PositionPtr Pos2 = n2->GetPosition();
int faceID = -1;
if( Pos1->GetTypeOfPosition()==SMDS_TOP_FACE ) {
faceID = Pos1->GetShapeId();
}
else if( Pos2->GetTypeOfPosition()==SMDS_TOP_FACE ) {
faceID = Pos2->GetShapeId();
}
if(faceID>-1) {
TopoDS_Face F = TopoDS::Face(meshDS->IndexToShape(faceID));
gp_XY p1 = GetNodeUV(F,n1,n2);
gp_XY p2 = GetNodeUV(F,n2,n1);
double u = (p1.X()+p2.X())/2.;
double v = (p1.Y()+p2.Y())/2.;
Handle(Geom_Surface) S = BRep_Tool::Surface(F);
gp_Pnt P = S->Value(u, v);
n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
meshDS->SetNodeOnFace(n12, faceID, u, v);
myNLinkNodeMap.insert(NLinkNodeMap::value_type(link,n12));
return n12;
}
}
// 3d variant
double x = ( n1->X() + n2->X() )/2.;
double y = ( n1->Y() + n2->Y() )/2.;
double z = ( n1->Z() + n2->Z() )/2.;
n12 = meshDS->AddNode(x,y,z);
meshDS->SetNodeInVolume(n12, myShapeID);
myNLinkNodeMap.insert(NLinkNodeMap::value_type(link,n12));
return n12;
}
}
//=======================================================================
//function : AddFace
//purpose :
//=======================================================================
/*!
* Special function for creation quadratic triangle
*/
SMDS_MeshFace* StdMeshers_Helper::AddFace(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
const SMDS_MeshNode* n3)
{
SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
if(!myCreateQuadratic) {
return meshDS->AddFace(n1, n2, n3);
}
const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,false);
const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,false);
const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,false);
return meshDS->AddFace(n1, n2, n3, n12, n23, n31);
}
//=======================================================================
//function : AddFace
//purpose :
//=======================================================================
/*!
* Special function for creation quadratic quadrangle
*/
SMDS_MeshFace* StdMeshers_Helper::AddFace(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
const SMDS_MeshNode* n3,
const SMDS_MeshNode* n4)
{
SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
if(!myCreateQuadratic) {
return meshDS->AddFace(n1, n2, n3, n4);
}
const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,false);
const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,false);
const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,false);
const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,false);
return meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41);
}
//=======================================================================
//function : AddVolume
//purpose :
//=======================================================================
/*!
* Special function for creation quadratic volume
*/
SMDS_MeshVolume* StdMeshers_Helper::AddVolume(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
const SMDS_MeshNode* n3,
const SMDS_MeshNode* n4,
const SMDS_MeshNode* n5,
const SMDS_MeshNode* n6)
{
SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
if(!myCreateQuadratic) {
return meshDS->AddVolume(n1, n2, n3, n4, n5, n6);
}
const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,true);
const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,true);
const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,true);
const SMDS_MeshNode* n45 = GetMediumNode(n4,n5,true);
const SMDS_MeshNode* n56 = GetMediumNode(n5,n6,true);
const SMDS_MeshNode* n64 = GetMediumNode(n6,n4,true);
const SMDS_MeshNode* n14 = GetMediumNode(n1,n4,true);
const SMDS_MeshNode* n25 = GetMediumNode(n2,n5,true);
const SMDS_MeshNode* n36 = GetMediumNode(n3,n6,true);
return meshDS->AddVolume(n1, n2, n3, n4, n5, n6,
n12, n23, n31, n45, n56, n64, n14, n25, n36);
}
//=======================================================================
//function : AddVolume
//purpose :
//=======================================================================
/*!
* Special function for creation quadratic volume
*/
SMDS_MeshVolume* StdMeshers_Helper::AddVolume(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
const SMDS_MeshNode* n3,
const SMDS_MeshNode* n4)
{
SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
if(!myCreateQuadratic) {
return meshDS->AddVolume(n1, n2, n3, n4);
}
const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,true);
const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,true);
const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,true);
const SMDS_MeshNode* n14 = GetMediumNode(n1,n4,true);
const SMDS_MeshNode* n24 = GetMediumNode(n2,n4,true);
const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,true);
return meshDS->AddVolume(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34);
}
//=======================================================================
//function : AddVolume
//purpose :
//=======================================================================
/*!
* Special function for creation quadratic volume
*/
SMDS_MeshVolume* StdMeshers_Helper::AddVolume(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
const SMDS_MeshNode* n3,
const SMDS_MeshNode* n4,
const SMDS_MeshNode* n5,
const SMDS_MeshNode* n6,
const SMDS_MeshNode* n7,
const SMDS_MeshNode* n8)
{
SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
if(!myCreateQuadratic) {
return meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8);
}
const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,true);
const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,true);
const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,true);
const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,true);
const SMDS_MeshNode* n56 = GetMediumNode(n5,n6,true);
const SMDS_MeshNode* n67 = GetMediumNode(n6,n7,true);
const SMDS_MeshNode* n78 = GetMediumNode(n7,n8,true);
const SMDS_MeshNode* n85 = GetMediumNode(n8,n5,true);
const SMDS_MeshNode* n15 = GetMediumNode(n1,n5,true);
const SMDS_MeshNode* n26 = GetMediumNode(n2,n6,true);
const SMDS_MeshNode* n37 = GetMediumNode(n3,n7,true);
const SMDS_MeshNode* n48 = GetMediumNode(n4,n8,true);
return meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
n12, n23, n34, n41, n56, n67,
n78, n85, n15, n26, n37, n48);
}
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