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StdMeshers_Quadrangle_2D.cpp
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StdMeshers_Quadrangle_2D.cpp
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// Copyright (C) 2007-2008 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
//
// SMESH SMESH : implementaion of SMESH idl descriptions
// File : StdMeshers_Quadrangle_2D.cxx
// Moved here from SMESH_Quadrangle_2D.cxx
// Author : Paul RASCLE, EDF
// Module : SMESH
// $Header: /home/server/cvs/SMESH/SMESH_SRC/src/StdMeshers/StdMeshers_Quadrangle_2D.cxx,v 1.14.2.5 2008/11/27 13:03:49 abd Exp $
//
#include "StdMeshers_Quadrangle_2D.hxx"
#include "StdMeshers_FaceSide.hxx"
#include "SMESH_Gen.hxx"
#include "SMESH_Mesh.hxx"
#include "SMESH_subMesh.hxx"
#include "SMESH_MesherHelper.hxx"
#include "SMESH_Block.hxx"
#include "SMESH_Comment.hxx"
#include "SMDS_MeshElement.hxx"
#include "SMDS_MeshNode.hxx"
#include "SMDS_EdgePosition.hxx"
#include "SMDS_FacePosition.hxx"
#include <BRepTools_WireExplorer.hxx>
#include <BRep_Tool.hxx>
#include <Geom_Surface.hxx>
#include <Precision.hxx>
#include <TColStd_SequenceOfReal.hxx>
#include <TColgp_SequenceOfXY.hxx>
#include <TopExp.hxx>
#include <TopTools_ListIteratorOfListOfShape.hxx>
#include <TopoDS.hxx>
#ifndef __BORLANDC__
#include <NCollection_DefineArray2.hxx>
#else
#include <SMESH_DefineArray2.hxx>
#endif
#include "utilities.h"
#include "SMESH_ExceptHandlers.hxx"
#include <cmath>
#ifndef StdMeshers_Array2OfNode_HeaderFile
#define StdMeshers_Array2OfNode_HeaderFile
typedef const SMDS_MeshNode* SMDS_MeshNodePtr;
#ifndef __BORLANDC__
#if OCC_VERSION_HEX >= 0x060703
typedef NCollection_Array2<SMDS_MeshNodePtr> StdMeshers_Array2OfNode;
#else
DEFINE_BASECOLLECTION (StdMeshers_BaseCollectionNodePtr, SMDS_MeshNodePtr)
DEFINE_ARRAY2(StdMeshers_Array2OfNode,
StdMeshers_BaseCollectionNodePtr, SMDS_MeshNodePtr)
#endif
#else
DEFINE_BASECOLLECTION (StdMeshers_BaseCollectionNodePtr, SMDS_MeshNodePtr)
SMESH_DEFINE_ARRAY2(StdMeshers_Array2OfNode,
StdMeshers_BaseCollectionNodePtr, SMDS_MeshNodePtr)
#endif
#endif
using namespace std;
typedef gp_XY gp_UV;
typedef SMESH_Comment TComm;
//=============================================================================
/*!
*
*/
//=============================================================================
StdMeshers_Quadrangle_2D::StdMeshers_Quadrangle_2D (int hypId, int studyId, SMESH_Gen* gen)
: SMESH_2D_Algo(hypId, studyId, gen)
{
MESSAGE("StdMeshers_Quadrangle_2D::StdMeshers_Quadrangle_2D");
_name = "Quadrangle_2D";
_shapeType = (1 << TopAbs_FACE);
_compatibleHypothesis.push_back("QuadranglePreference");
_compatibleHypothesis.push_back("TrianglePreference");
myTool = 0;
}
//=============================================================================
/*!
*
*/
//=============================================================================
StdMeshers_Quadrangle_2D::~StdMeshers_Quadrangle_2D()
{
MESSAGE("StdMeshers_Quadrangle_2D::~StdMeshers_Quadrangle_2D");
}
//=============================================================================
/*!
*
*/
//=============================================================================
bool StdMeshers_Quadrangle_2D::CheckHypothesis
(SMESH_Mesh& aMesh,
const TopoDS_Shape& aShape,
SMESH_Hypothesis::Hypothesis_Status& aStatus)
{
bool isOk = true;
aStatus = SMESH_Hypothesis::HYP_OK;
const list <const SMESHDS_Hypothesis * >&hyps = GetUsedHypothesis(aMesh, aShape, false);
const SMESHDS_Hypothesis *theHyp = 0;
if(hyps.size() > 0){
theHyp = *hyps.begin();
if(strcmp("QuadranglePreference", theHyp->GetName()) == 0) {
myQuadranglePreference= true;
myTrianglePreference= false;
}
else if(strcmp("TrianglePreference", theHyp->GetName()) == 0){
myQuadranglePreference= false;
myTrianglePreference= true;
}
}
else {
myQuadranglePreference = false;
myTrianglePreference = false;
}
return isOk;
}
//=============================================================================
/*!
*
*/
//=============================================================================
bool StdMeshers_Quadrangle_2D::Compute (SMESH_Mesh& aMesh,
const TopoDS_Shape& aShape)// throw (SMESH_Exception)
{
// PAL14921. Enable catching std::bad_alloc and Standard_OutOfMemory outside
//Unexpect aCatchSalomeException);
SMESHDS_Mesh * meshDS = aMesh.GetMeshDS();
aMesh.GetSubMesh(aShape);
SMESH_MesherHelper helper(aMesh);
myTool = &helper;
_quadraticMesh = myTool->IsQuadraticSubMesh(aShape);
FaceQuadStruct *quad = CheckNbEdges( aMesh, aShape );
std::auto_ptr<FaceQuadStruct> quadDeleter( quad ); // to delete quad at exit from Compute()
if (!quad)
return false;
if(myQuadranglePreference) {
int n1 = quad->side[0]->NbPoints();
int n2 = quad->side[1]->NbPoints();
int n3 = quad->side[2]->NbPoints();
int n4 = quad->side[3]->NbPoints();
int nfull = n1+n2+n3+n4;
int ntmp = nfull/2;
ntmp = ntmp*2;
if( nfull==ntmp && ( (n1!=n3) || (n2!=n4) ) ) {
// special path for using only quandrangle faces
bool ok = ComputeQuadPref(aMesh, aShape, quad);
return ok;
}
}
// set normalized grid on unit square in parametric domain
if (!SetNormalizedGrid(aMesh, aShape, quad))
return false;
// --- compute 3D values on points, store points & quadrangles
int nbdown = quad->side[0]->NbPoints();
int nbup = quad->side[2]->NbPoints();
int nbright = quad->side[1]->NbPoints();
int nbleft = quad->side[3]->NbPoints();
int nbhoriz = Min(nbdown, nbup);
int nbvertic = Min(nbright, nbleft);
const TopoDS_Face& F = TopoDS::Face(aShape);
Handle(Geom_Surface) S = BRep_Tool::Surface(F);
// internal mesh nodes
int i, j, geomFaceID = meshDS->ShapeToIndex( F );
for (i = 1; i < nbhoriz - 1; i++) {
for (j = 1; j < nbvertic - 1; j++) {
int ij = j * nbhoriz + i;
double u = quad->uv_grid[ij].u;
double v = quad->uv_grid[ij].v;
gp_Pnt P = S->Value(u, v);
SMDS_MeshNode * node = meshDS->AddNode(P.X(), P.Y(), P.Z());
meshDS->SetNodeOnFace(node, geomFaceID, u, v);
quad->uv_grid[ij].node = node;
}
}
// mesh faces
// [2]
// --.--.--.--.--.-- nbvertic
// | | ^
// | | ^
// [3] | | ^ j [1]
// | | ^
// | | ^
// ---.----.----.--- 0
// 0 > > > > > > > > nbhoriz
// i
// [0]
i = 0;
int ilow = 0;
int iup = nbhoriz - 1;
if (quad->isEdgeOut[3]) { ilow++; } else { if (quad->isEdgeOut[1]) iup--; }
int jlow = 0;
int jup = nbvertic - 1;
if (quad->isEdgeOut[0]) { jlow++; } else { if (quad->isEdgeOut[2]) jup--; }
// regular quadrangles
for (i = ilow; i < iup; i++) {
for (j = jlow; j < jup; j++) {
const SMDS_MeshNode *a, *b, *c, *d;
a = quad->uv_grid[j * nbhoriz + i].node;
b = quad->uv_grid[j * nbhoriz + i + 1].node;
c = quad->uv_grid[(j + 1) * nbhoriz + i + 1].node;
d = quad->uv_grid[(j + 1) * nbhoriz + i].node;
//SMDS_MeshFace* face = myTool->AddFace(a, b, c, d);
//meshDS->SetMeshElementOnShape(face, geomFaceID);
if(!myTrianglePreference){
SMDS_MeshFace* face = myTool->AddFace(a, b, c, d);
meshDS->SetMeshElementOnShape(face, geomFaceID);
}
else {
SplitQuad(meshDS, geomFaceID, a, b, c, d);
}
}
}
const vector<UVPtStruct>& uv_e0 = quad->side[0]->GetUVPtStruct(true,0 );
const vector<UVPtStruct>& uv_e1 = quad->side[1]->GetUVPtStruct(false,1);
const vector<UVPtStruct>& uv_e2 = quad->side[2]->GetUVPtStruct(true,1 );
const vector<UVPtStruct>& uv_e3 = quad->side[3]->GetUVPtStruct(false,0);
if ( uv_e0.empty() || uv_e1.empty() || uv_e2.empty() || uv_e3.empty() )
return error( COMPERR_BAD_INPUT_MESH );
double eps = Precision::Confusion();
// Boundary quadrangles
if (quad->isEdgeOut[0]) {
// Down edge is out
//
// |___|___|___|___|___|___|
// | | | | | | |
// |___|___|___|___|___|___|
// | | | | | | |
// |___|___|___|___|___|___| __ first row of the regular grid
// . . . . . . . . . __ down edge nodes
//
// >->->->->->->->->->->->-> -- direction of processing
int g = 0; // number of last processed node in the regular grid
// number of last node of the down edge to be processed
int stop = nbdown - 1;
// if right edge is out, we will stop at a node, previous to the last one
if (quad->isEdgeOut[1]) stop--;
// for each node of the down edge find nearest node
// in the first row of the regular grid and link them
for (i = 0; i < stop; i++) {
const SMDS_MeshNode *a, *b, *c, *d;
a = uv_e0[i].node;
b = uv_e0[i + 1].node;
gp_Pnt pb (b->X(), b->Y(), b->Z());
// find node c in the regular grid, which will be linked with node b
int near = g;
if (i == stop - 1) {
// right bound reached, link with the rightmost node
near = iup;
c = quad->uv_grid[nbhoriz + iup].node;
}
else {
// find in the grid node c, nearest to the b
double mind = RealLast();
for (int k = g; k <= iup; k++) {
const SMDS_MeshNode *nk;
if (k < ilow) // this can be, if left edge is out
nk = uv_e3[1].node; // get node from the left edge
else
nk = quad->uv_grid[nbhoriz + k].node; // get one of middle nodes
gp_Pnt pnk (nk->X(), nk->Y(), nk->Z());
double dist = pb.Distance(pnk);
if (dist < mind - eps) {
c = nk;
near = k;
mind = dist;
} else {
break;
}
}
}
if (near == g) { // make triangle
//SMDS_MeshFace* face = meshDS->AddFace(a, b, c);
SMDS_MeshFace* face = myTool->AddFace(a, b, c);
meshDS->SetMeshElementOnShape(face, geomFaceID);
}
else { // make quadrangle
if (near - 1 < ilow)
d = uv_e3[1].node;
else
d = quad->uv_grid[nbhoriz + near - 1].node;
//SMDS_MeshFace* face = meshDS->AddFace(a, b, c, d);
if(!myTrianglePreference){
SMDS_MeshFace* face = myTool->AddFace(a, b, c, d);
meshDS->SetMeshElementOnShape(face, geomFaceID);
}
else {
SplitQuad(meshDS, geomFaceID, a, b, c, d);
}
// if node d is not at position g - make additional triangles
if (near - 1 > g) {
for (int k = near - 1; k > g; k--) {
c = quad->uv_grid[nbhoriz + k].node;
if (k - 1 < ilow)
d = uv_e3[1].node;
else
d = quad->uv_grid[nbhoriz + k - 1].node;
//SMDS_MeshFace* face = meshDS->AddFace(a, c, d);
SMDS_MeshFace* face = myTool->AddFace(a, c, d);
meshDS->SetMeshElementOnShape(face, geomFaceID);
}
}
g = near;
}
}
} else {
if (quad->isEdgeOut[2]) {
// Up edge is out
//
// <-<-<-<-<-<-<-<-<-<-<-<-< -- direction of processing
//
// . . . . . . . . . __ up edge nodes
// ___ ___ ___ ___ ___ ___ __ first row of the regular grid
// | | | | | | |
// |___|___|___|___|___|___|
// | | | | | | |
// |___|___|___|___|___|___|
// | | | | | | |
int g = nbhoriz - 1; // last processed node in the regular grid
int stop = 0;
// if left edge is out, we will stop at a second node
if (quad->isEdgeOut[3]) stop++;
// for each node of the up edge find nearest node
// in the first row of the regular grid and link them
for (i = nbup - 1; i > stop; i--) {
const SMDS_MeshNode *a, *b, *c, *d;
a = uv_e2[i].node;
b = uv_e2[i - 1].node;
gp_Pnt pb (b->X(), b->Y(), b->Z());
// find node c in the grid, which will be linked with node b
int near = g;
if (i == stop + 1) { // left bound reached, link with the leftmost node
c = quad->uv_grid[nbhoriz*(nbvertic - 2) + ilow].node;
near = ilow;
} else {
// find node c in the grid, nearest to the b
double mind = RealLast();
for (int k = g; k >= ilow; k--) {
const SMDS_MeshNode *nk;
if (k > iup)
nk = uv_e1[nbright - 2].node;
else
nk = quad->uv_grid[nbhoriz*(nbvertic - 2) + k].node;
gp_Pnt pnk (nk->X(), nk->Y(), nk->Z());
double dist = pb.Distance(pnk);
if (dist < mind - eps) {
c = nk;
near = k;
mind = dist;
} else {
break;
}
}
}
if (near == g) { // make triangle
//SMDS_MeshFace* face = meshDS->AddFace(a, b, c);
SMDS_MeshFace* face = myTool->AddFace(a, b, c);
meshDS->SetMeshElementOnShape(face, geomFaceID);
}
else { // make quadrangle
if (near + 1 > iup)
d = uv_e1[nbright - 2].node;
else
d = quad->uv_grid[nbhoriz*(nbvertic - 2) + near + 1].node;
//SMDS_MeshFace* face = meshDS->AddFace(a, b, c, d);
if(!myTrianglePreference){
SMDS_MeshFace* face = myTool->AddFace(a, b, c, d);
meshDS->SetMeshElementOnShape(face, geomFaceID);
}
else {
SplitQuad(meshDS, geomFaceID, a, b, c, d);
}
if (near + 1 < g) { // if d not is at g - make additional triangles
for (int k = near + 1; k < g; k++) {
c = quad->uv_grid[nbhoriz*(nbvertic - 2) + k].node;
if (k + 1 > iup)
d = uv_e1[nbright - 2].node;
else
d = quad->uv_grid[nbhoriz*(nbvertic - 2) + k + 1].node;
//SMDS_MeshFace* face = meshDS->AddFace(a, c, d);
SMDS_MeshFace* face = myTool->AddFace(a, c, d);
meshDS->SetMeshElementOnShape(face, geomFaceID);
}
}
g = near;
}
}
}
}
// right or left boundary quadrangles
if (quad->isEdgeOut[1]) {
// MESSAGE("right edge is out");
int g = 0; // last processed node in the grid
int stop = nbright - 1;
if (quad->isEdgeOut[2]) stop--;
for (i = 0; i < stop; i++) {
const SMDS_MeshNode *a, *b, *c, *d;
a = uv_e1[i].node;
b = uv_e1[i + 1].node;
gp_Pnt pb (b->X(), b->Y(), b->Z());
// find node c in the grid, nearest to the b
int near = g;
if (i == stop - 1) { // up bondary reached
c = quad->uv_grid[nbhoriz*(jup + 1) - 2].node;
near = jup;
} else {
double mind = RealLast();
for (int k = g; k <= jup; k++) {
const SMDS_MeshNode *nk;
if (k < jlow)
nk = uv_e0[nbdown - 2].node;
else
nk = quad->uv_grid[nbhoriz*(k + 1) - 2].node;
gp_Pnt pnk (nk->X(), nk->Y(), nk->Z());
double dist = pb.Distance(pnk);
if (dist < mind - eps) {
c = nk;
near = k;
mind = dist;
} else {
break;
}
}
}
if (near == g) { // make triangle
//SMDS_MeshFace* face = meshDS->AddFace(a, b, c);
SMDS_MeshFace* face = myTool->AddFace(a, b, c);
meshDS->SetMeshElementOnShape(face, geomFaceID);
}
else { // make quadrangle
if (near - 1 < jlow)
d = uv_e0[nbdown - 2].node;
else
d = quad->uv_grid[nbhoriz*near - 2].node;
//SMDS_MeshFace* face = meshDS->AddFace(a, b, c, d);
if(!myTrianglePreference){
SMDS_MeshFace* face = myTool->AddFace(a, b, c, d);
meshDS->SetMeshElementOnShape(face, geomFaceID);
}
else {
SplitQuad(meshDS, geomFaceID, a, b, c, d);
}
if (near - 1 > g) { // if d not is at g - make additional triangles
for (int k = near - 1; k > g; k--) {
c = quad->uv_grid[nbhoriz*(k + 1) - 2].node;
if (k - 1 < jlow)
d = uv_e0[nbdown - 2].node;
else
d = quad->uv_grid[nbhoriz*k - 2].node;
//SMDS_MeshFace* face = meshDS->AddFace(a, c, d);
SMDS_MeshFace* face = myTool->AddFace(a, c, d);
meshDS->SetMeshElementOnShape(face, geomFaceID);
}
}
g = near;
}
}
} else {
if (quad->isEdgeOut[3]) {
// MESSAGE("left edge is out");
int g = nbvertic - 1; // last processed node in the grid
int stop = 0;
if (quad->isEdgeOut[0]) stop++;
for (i = nbleft - 1; i > stop; i--) {
const SMDS_MeshNode *a, *b, *c, *d;
a = uv_e3[i].node;
b = uv_e3[i - 1].node;
gp_Pnt pb (b->X(), b->Y(), b->Z());
// find node c in the grid, nearest to the b
int near = g;
if (i == stop + 1) { // down bondary reached
c = quad->uv_grid[nbhoriz*jlow + 1].node;
near = jlow;
} else {
double mind = RealLast();
for (int k = g; k >= jlow; k--) {
const SMDS_MeshNode *nk;
if (k > jup)
nk = uv_e2[1].node;
else
nk = quad->uv_grid[nbhoriz*k + 1].node;
gp_Pnt pnk (nk->X(), nk->Y(), nk->Z());
double dist = pb.Distance(pnk);
if (dist < mind - eps) {
c = nk;
near = k;
mind = dist;
} else {
break;
}
}
}
if (near == g) { // make triangle
//SMDS_MeshFace* face = meshDS->AddFace(a, b, c);
SMDS_MeshFace* face = myTool->AddFace(a, b, c);
meshDS->SetMeshElementOnShape(face, geomFaceID);
}
else { // make quadrangle
if (near + 1 > jup)
d = uv_e2[1].node;
else
d = quad->uv_grid[nbhoriz*(near + 1) + 1].node;
//SMDS_MeshFace* face = meshDS->AddFace(a, b, c, d);
if(!myTrianglePreference){
SMDS_MeshFace* face = myTool->AddFace(a, b, c, d);
meshDS->SetMeshElementOnShape(face, geomFaceID);
}
else {
SplitQuad(meshDS, geomFaceID, a, b, c, d);
}
if (near + 1 < g) { // if d not is at g - make additional triangles
for (int k = near + 1; k < g; k++) {
c = quad->uv_grid[nbhoriz*k + 1].node;
if (k + 1 > jup)
d = uv_e2[1].node;
else
d = quad->uv_grid[nbhoriz*(k + 1) + 1].node;
//SMDS_MeshFace* face = meshDS->AddFace(a, c, d);
SMDS_MeshFace* face = myTool->AddFace(a, c, d);
meshDS->SetMeshElementOnShape(face, geomFaceID);
}
}
g = near;
}
}
}
}
bool isOk = true;
return isOk;
}
//================================================================================
/*!
* \brief Return true if only two given edges meat at their common vertex
*/
//================================================================================
static bool twoEdgesMeatAtVertex(const TopoDS_Edge& e1,
const TopoDS_Edge& e2,
SMESH_Mesh & mesh)
{
TopoDS_Vertex v;
if ( !TopExp::CommonVertex( e1, e2, v ))
return false;
TopTools_ListIteratorOfListOfShape ancestIt( mesh.GetAncestors( v ));
for ( ; ancestIt.More() ; ancestIt.Next() )
if ( ancestIt.Value().ShapeType() == TopAbs_EDGE )
if ( !e1.IsSame( ancestIt.Value() ) && !e2.IsSame( ancestIt.Value() ))
return false;
return true;
}
//=============================================================================
/*!
*
*/
//=============================================================================
FaceQuadStruct* StdMeshers_Quadrangle_2D::CheckNbEdges(SMESH_Mesh & aMesh,
const TopoDS_Shape & aShape)
//throw(SMESH_Exception)
{
const TopoDS_Face & F = TopoDS::Face(aShape);
const bool ignoreMediumNodes = _quadraticMesh;
// verify 1 wire only, with 4 edges
TopoDS_Vertex V;
list< TopoDS_Edge > edges;
list< int > nbEdgesInWire;
int nbWire = SMESH_Block::GetOrderedEdges (F, V, edges, nbEdgesInWire);
if (nbWire != 1) {
error(COMPERR_BAD_SHAPE, TComm("Wrong number of wires: ") << nbWire);
return 0;
}
FaceQuadStruct* quad = new FaceQuadStruct;
quad->uv_grid = 0;
quad->side.reserve(nbEdgesInWire.front());
int nbSides = 0;
list< TopoDS_Edge >::iterator edgeIt = edges.begin();
if ( nbEdgesInWire.front() == 4 ) { // exactly 4 edges
for ( ; edgeIt != edges.end(); ++edgeIt, nbSides++ )
quad->side.push_back( new StdMeshers_FaceSide(F, *edgeIt, &aMesh,
nbSides<TOP_SIDE, ignoreMediumNodes));
}
else if ( nbEdgesInWire.front() > 4 ) { // more than 4 edges - try to unite some
list< TopoDS_Edge > sideEdges;
while ( !edges.empty()) {
sideEdges.clear();
sideEdges.splice( sideEdges.end(), edges, edges.begin()); // edges.front() -> sideEdges.end()
bool sameSide = true;
while ( !edges.empty() && sameSide ) {
sameSide = SMESH_Algo::IsContinuous( sideEdges.back(), edges.front() );
if ( sameSide )
sideEdges.splice( sideEdges.end(), edges, edges.begin());
}
if ( nbSides == 0 ) { // go backward from the first edge
sameSide = true;
while ( !edges.empty() && sameSide ) {
sameSide = SMESH_Algo::IsContinuous( sideEdges.front(), edges.back() );
if ( sameSide )
sideEdges.splice( sideEdges.begin(), edges, --edges.end());
}
}
quad->side.push_back( new StdMeshers_FaceSide(F, sideEdges, &aMesh,
nbSides<TOP_SIDE, ignoreMediumNodes));
++nbSides;
}
// issue 20222. Try to unite only edges shared by two same faces
if (nbSides < 4) {
// delete found sides
{ FaceQuadStruct cleaner( *quad ); }
quad->side.clear();
quad->side.reserve(nbEdgesInWire.front());
nbSides = 0;
SMESH_Block::GetOrderedEdges (F, V, edges, nbEdgesInWire);
while ( !edges.empty()) {
sideEdges.clear();
sideEdges.splice( sideEdges.end(), edges, edges.begin());
bool sameSide = true;
while ( !edges.empty() && sameSide ) {
sameSide =
SMESH_Algo::IsContinuous( sideEdges.back(), edges.front() ) &&
twoEdgesMeatAtVertex( sideEdges.back(), edges.front(), aMesh );
if ( sameSide )
sideEdges.splice( sideEdges.end(), edges, edges.begin());
}
if ( nbSides == 0 ) { // go backward from the first edge
sameSide = true;
while ( !edges.empty() && sameSide ) {
sameSide =
SMESH_Algo::IsContinuous( sideEdges.front(), edges.back() ) &&
twoEdgesMeatAtVertex( sideEdges.front(), edges.back(), aMesh );
if ( sameSide )
sideEdges.splice( sideEdges.begin(), edges, --edges.end());
}
}
quad->side.push_back( new StdMeshers_FaceSide(F, sideEdges, &aMesh,
nbSides<TOP_SIDE, ignoreMediumNodes));
++nbSides;
}
}
}
if (nbSides != 4) {
#ifdef _DEBUG_
MESSAGE ( "StdMeshers_Quadrangle_2D. Edge IDs of " << nbSides << " sides:\n" );
for ( int i = 0; i < nbSides; ++i ) {
MESSAGE ( " ( " );
for ( int e = 0; e < quad->side[i]->NbEdges(); ++e )
MESSAGE ( myTool->GetMeshDS()->ShapeToIndex( quad->side[i]->Edge( e )) << " " );
MESSAGE ( ")\n" );
}
//cout << endl;
#endif
if ( !nbSides )
nbSides = nbEdgesInWire.front();
error(COMPERR_BAD_SHAPE, TComm("Face must have 4 sides but not ") << nbSides);
delete quad;
quad = 0;
}
return quad;
}
//=============================================================================
/*!
* CheckAnd2Dcompute
*/
//=============================================================================
FaceQuadStruct *StdMeshers_Quadrangle_2D::CheckAnd2Dcompute
(SMESH_Mesh & aMesh,
const TopoDS_Shape & aShape,
const bool CreateQuadratic) //throw(SMESH_Exception)
{
_quadraticMesh = CreateQuadratic;
FaceQuadStruct *quad = CheckNbEdges(aMesh, aShape);
if(!quad) return 0;
// set normalized grid on unit square in parametric domain
bool stat = SetNormalizedGrid(aMesh, aShape, quad);
if(!stat) {
if(!quad)
delete quad;
quad = 0;
}
return quad;
}
//=============================================================================
/*!
*
*/
//=============================================================================
faceQuadStruct::~faceQuadStruct()
{
for (int i = 0; i < side.size(); i++) {
if (side[i]) delete side[i];
}
if (uv_grid) delete [] uv_grid;
}
namespace {
inline const vector<UVPtStruct>& GetUVPtStructIn(FaceQuadStruct* quad, int i, int nbSeg)
{
bool isXConst = ( i == BOTTOM_SIDE || i == TOP_SIDE );
double constValue = ( i == BOTTOM_SIDE || i == LEFT_SIDE ) ? 0 : 1;
return
quad->isEdgeOut[i] ?
quad->side[i]->SimulateUVPtStruct(nbSeg,isXConst,constValue) :
quad->side[i]->GetUVPtStruct(isXConst,constValue);
}
}
//=============================================================================
/*!
*
*/
//=============================================================================
bool StdMeshers_Quadrangle_2D::SetNormalizedGrid (SMESH_Mesh & aMesh,
const TopoDS_Shape& aShape,
FaceQuadStruct* & quad) //throw (SMESH_Exception)
{
// Algorithme décrit dans "Génération automatique de maillages"
// P.L. GEORGE, MASSON, § 6.4.1 p. 84-85
// traitement dans le domaine paramétrique 2d u,v
// transport - projection sur le carré unité
// MESSAGE("StdMeshers_Quadrangle_2D::SetNormalizedGrid");
// const TopoDS_Face& F = TopoDS::Face(aShape);
// 1 --- find orientation of the 4 edges, by test on extrema
// max min 0 x1 1
// |<----north-2-------^ a3 -------------> a2
// | | ^1 1^
// west-3 east-1 =right | |
// | | ==> | |
// y0 | | y1 | |
// | | |0 0|
// v----south-0--------> a0 -------------> a1
// min max 0 x0 1
// =down
//
// 3 --- 2D normalized values on unit square [0..1][0..1]
int nbhoriz = Min(quad->side[0]->NbPoints(), quad->side[2]->NbPoints());
int nbvertic = Min(quad->side[1]->NbPoints(), quad->side[3]->NbPoints());
quad->isEdgeOut[0] = (quad->side[0]->NbPoints() > quad->side[2]->NbPoints());
quad->isEdgeOut[1] = (quad->side[1]->NbPoints() > quad->side[3]->NbPoints());
quad->isEdgeOut[2] = (quad->side[2]->NbPoints() > quad->side[0]->NbPoints());
quad->isEdgeOut[3] = (quad->side[3]->NbPoints() > quad->side[1]->NbPoints());
UVPtStruct *uv_grid = quad->uv_grid = new UVPtStruct[nbvertic * nbhoriz];
const vector<UVPtStruct>& uv_e0 = GetUVPtStructIn( quad, 0, nbhoriz - 1 );
const vector<UVPtStruct>& uv_e1 = GetUVPtStructIn( quad, 1, nbvertic - 1 );
const vector<UVPtStruct>& uv_e2 = GetUVPtStructIn( quad, 2, nbhoriz - 1 );
const vector<UVPtStruct>& uv_e3 = GetUVPtStructIn( quad, 3, nbvertic - 1 );
if ( uv_e0.empty() || uv_e1.empty() || uv_e2.empty() || uv_e3.empty() )
//return error( "Can't find nodes on sides");
return error( COMPERR_BAD_INPUT_MESH );
// nodes Id on "in" edges
if (! quad->isEdgeOut[0]) {
int j = 0;
for (int i = 0; i < nbhoriz; i++) { // down
int ij = j * nbhoriz + i;
uv_grid[ij].node = uv_e0[i].node;
}
}
if (! quad->isEdgeOut[1]) {
int i = nbhoriz - 1;
for (int j = 0; j < nbvertic; j++) { // right
int ij = j * nbhoriz + i;
uv_grid[ij].node = uv_e1[j].node;
}
}
if (! quad->isEdgeOut[2]) {
int j = nbvertic - 1;
for (int i = 0; i < nbhoriz; i++) { // up
int ij = j * nbhoriz + i;
uv_grid[ij].node = uv_e2[i].node;
}
}
if (! quad->isEdgeOut[3]) {
int i = 0;
for (int j = 0; j < nbvertic; j++) { // left
int ij = j * nbhoriz + i;
uv_grid[ij].node = uv_e3[j].node;
}
}
// normalized 2d values on grid
for (int i = 0; i < nbhoriz; i++)
{
for (int j = 0; j < nbvertic; j++)
{
int ij = j * nbhoriz + i;
// --- droite i cste : x = x0 + y(x1-x0)
double x0 = uv_e0[i].normParam; // bas - sud
double x1 = uv_e2[i].normParam; // haut - nord
// --- droite j cste : y = y0 + x(y1-y0)
double y0 = uv_e3[j].normParam; // gauche-ouest
double y1 = uv_e1[j].normParam; // droite - est
// --- intersection : x=x0+(y0+x(y1-y0))(x1-x0)
double x = (x0 + y0 * (x1 - x0)) / (1 - (y1 - y0) * (x1 - x0));
double y = y0 + x * (y1 - y0);
uv_grid[ij].x = x;
uv_grid[ij].y = y;
//MESSAGE("-xy-01 "<<x0<<" "<<x1<<" "<<y0<<" "<<y1);
//MESSAGE("-xy-norm "<<i<<" "<<j<<" "<<x<<" "<<y);
}
}
// 4 --- projection on 2d domain (u,v)
gp_UV a0( uv_e0.front().u, uv_e0.front().v );
gp_UV a1( uv_e0.back().u, uv_e0.back().v );
gp_UV a2( uv_e2.back().u, uv_e2.back().v );
gp_UV a3( uv_e2.front().u, uv_e2.front().v );
for (int i = 0; i < nbhoriz; i++)
{
for (int j = 0; j < nbvertic; j++)
{
int ij = j * nbhoriz + i;
double x = uv_grid[ij].x;
double y = uv_grid[ij].y;
double param_0 = uv_e0[0].normParam + x * (uv_e0.back().normParam - uv_e0[0].normParam); // sud
double param_2 = uv_e2[0].normParam + x * (uv_e2.back().normParam - uv_e2[0].normParam); // nord
double param_1 = uv_e1[0].normParam + y * (uv_e1.back().normParam - uv_e1[0].normParam); // est
double param_3 = uv_e3[0].normParam + y * (uv_e3.back().normParam - uv_e3[0].normParam); // ouest
//MESSAGE("params "<<param_0<<" "<<param_1<<" "<<param_2<<" "<<param_3);
gp_UV p0 = quad->side[0]->Value2d(param_0).XY();
gp_UV p1 = quad->side[1]->Value2d(param_1).XY();
gp_UV p2 = quad->side[2]->Value2d(param_2).XY();
gp_UV p3 = quad->side[3]->Value2d(param_3).XY();
gp_UV uv = (1 - y) * p0 + x * p1 + y * p2 + (1 - x) * p3;
uv -= (1 - x) * (1 - y) * a0 + x * (1 - y) * a1 + x * y * a2 + (1 - x) * y * a3;
uv_grid[ij].u = uv.X();
uv_grid[ij].v = uv.Y();
}
}
return true;
}
//=======================================================================
//function : ShiftQuad
//purpose : auxilary function for ComputeQuadPref
//=======================================================================
static void ShiftQuad(FaceQuadStruct* quad, const int num, bool)
{
StdMeshers_FaceSide* side[4] = { quad->side[0], quad->side[1], quad->side[2], quad->side[3] };
for (int i = BOTTOM_SIDE; i < NB_SIDES; ++i ) {
int id = ( i + num ) % NB_SIDES;
bool wasForward = ( i < TOP_SIDE );
bool newForward = ( id < TOP_SIDE );
if ( wasForward != newForward )
side[ i ]->Reverse();
quad->side[ id ] = side[ i ];
}
}
//=======================================================================
//function : CalcUV
//purpose : auxilary function for ComputeQuadPref
//=======================================================================
static gp_UV CalcUV(double x0, double x1, double y0, double y1,
FaceQuadStruct* quad,
const gp_UV& a0, const gp_UV& a1,
const gp_UV& a2, const gp_UV& a3)
{
const vector<UVPtStruct>& uv_eb = quad->side[0]->GetUVPtStruct(true,0 );
const vector<UVPtStruct>& uv_er = quad->side[1]->GetUVPtStruct(false,1);
const vector<UVPtStruct>& uv_et = quad->side[2]->GetUVPtStruct(true,1 );
const vector<UVPtStruct>& uv_el = quad->side[3]->GetUVPtStruct(false,0);
double x = (x0 + y0 * (x1 - x0)) / (1 - (y1 - y0) * (x1 - x0));
double y = y0 + x * (y1 - y0);
double param_b = uv_eb[0].normParam + x * (uv_eb.back().normParam - uv_eb[0].normParam);
double param_t = uv_et[0].normParam + x * (uv_et.back().normParam - uv_et[0].normParam);
double param_r = uv_er[0].normParam + y * (uv_er.back().normParam - uv_er[0].normParam);
double param_l = uv_el[0].normParam + y * (uv_el.back().normParam - uv_el[0].normParam);
gp_UV p0 = quad->side[BOTTOM_SIDE]->Value2d(param_b).XY();
gp_UV p1 = quad->side[RIGHT_SIDE ]->Value2d(param_r).XY();
gp_UV p2 = quad->side[TOP_SIDE ]->Value2d(param_t).XY();
gp_UV p3 = quad->side[LEFT_SIDE ]->Value2d(param_l).XY();
gp_UV uv = p0 * (1 - y) + p1 * x + p2 * y + p3 * (1 - x);
uv -= (1 - x) * (1 - y) * a0 + x * (1 - y) * a1 + x * y * a2 + (1 - x) * y * a3;
return uv;
}
//=======================================================================
//function : CalcUV2
//purpose : auxilary function for ComputeQuadPref