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occt/src/BRepTools/BRepTools.cxx
ifv 2651bfde07 0024890: Result of uniform scaling is invalid 
Test case for issue CR24890
2015-11-19 14:15:15 +03:00

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// Created on: 1993-01-21
// Created by: Remi LEQUETTE
// Copyright (c) 1993-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.
#include <Bnd_Box2d.hxx>
#include <BndLib_Add2dCurve.hxx>
#include <BRep_Builder.hxx>
#include <BRep_CurveRepresentation.hxx>
#include <BRep_ListIteratorOfListOfCurveRepresentation.hxx>
#include <BRep_TEdge.hxx>
#include <BRep_Tool.hxx>
#include <BRepTools.hxx>
#include <BRepTools_MapOfVertexPnt2d.hxx>
#include <BRepTools_ShapeSet.hxx>
#include <ElCLib.hxx>
#include <Geom2d_Curve.hxx>
#include <Geom2dAdaptor_Curve.hxx>
#include <Geom_BSplineSurface.hxx>
#include <Geom_Curve.hxx>
#include <Geom_RectangularTrimmedSurface.hxx>
#include <Geom_Surface.hxx>
#include <gp_Lin2d.hxx>
#include <gp_Vec2d.hxx>
#include <Message_ProgressIndicator.hxx>
#include <OSD_OpenFile.hxx>
#include <Poly_PolygonOnTriangulation.hxx>
#include <Poly_Triangulation.hxx>
#include <Precision.hxx>
#include <Standard_ErrorHandler.hxx>
#include <Standard_Failure.hxx>
#include <Standard_Stream.hxx>
#include <TColGeom2d_SequenceOfCurve.hxx>
#include <TColgp_SequenceOfPnt2d.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <TColStd_HArray1OfInteger.hxx>
#include <TColStd_MapOfTransient.hxx>
#include <TColStd_SequenceOfReal.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Compound.hxx>
#include <TopoDS_CompSolid.hxx>
#include <TopoDS_Edge.hxx>
#include <TopoDS_Face.hxx>
#include <TopoDS_Iterator.hxx>
#include <TopoDS_Shape.hxx>
#include <TopoDS_Shell.hxx>
#include <TopoDS_Solid.hxx>
#include <TopoDS_Vertex.hxx>
#include <TopoDS_Wire.hxx>
#include <TopTools_SequenceOfShape.hxx>
#include <GeomLib_CheckCurveOnSurface.hxx>
#include <errno.h>
//=======================================================================
//function : UVBounds
//purpose :
//=======================================================================
void BRepTools::UVBounds(const TopoDS_Face& F,
Standard_Real& UMin, Standard_Real& UMax,
Standard_Real& VMin, Standard_Real& VMax)
{
Bnd_Box2d B;
AddUVBounds(F,B);
B.Get(UMin,VMin,UMax,VMax);
}
//=======================================================================
//function : UVBounds
//purpose :
//=======================================================================
void BRepTools::UVBounds(const TopoDS_Face& F,
const TopoDS_Wire& W,
Standard_Real& UMin, Standard_Real& UMax,
Standard_Real& VMin, Standard_Real& VMax)
{
Bnd_Box2d B;
AddUVBounds(F,W,B);
B.Get(UMin,VMin,UMax,VMax);
}
//=======================================================================
//function : UVBounds
//purpose :
//=======================================================================
void BRepTools::UVBounds(const TopoDS_Face& F,
const TopoDS_Edge& E,
Standard_Real& UMin, Standard_Real& UMax,
Standard_Real& VMin, Standard_Real& VMax)
{
Bnd_Box2d B;
AddUVBounds(F,E,B);
B.Get(UMin,VMin,UMax,VMax);
}
//=======================================================================
//function : AddUVBounds
//purpose :
//=======================================================================
void BRepTools::AddUVBounds(const TopoDS_Face& FF, Bnd_Box2d& B)
{
TopoDS_Face F = FF;
F.Orientation(TopAbs_FORWARD);
TopExp_Explorer ex(F,TopAbs_EDGE);
// fill box for the given face
Bnd_Box2d aBox;
for (;ex.More();ex.Next()) {
BRepTools::AddUVBounds(F,TopoDS::Edge(ex.Current()),aBox);
}
// if the box is empty (face without edges or without pcurves),
// get natural bounds
if (aBox.IsVoid()) {
Standard_Real UMin,UMax,VMin,VMax;
TopLoc_Location L;
BRep_Tool::Surface(F,L)->Bounds(UMin,UMax,VMin,VMax);
aBox.Update(UMin,VMin,UMax,VMax);
}
// add face box to result
B.Add ( aBox );
}
//=======================================================================
//function : AddUVBounds
//purpose :
//=======================================================================
void BRepTools::AddUVBounds(const TopoDS_Face& F,
const TopoDS_Wire& W,
Bnd_Box2d& B)
{
TopExp_Explorer ex;
for (ex.Init(W,TopAbs_EDGE);ex.More();ex.Next()) {
BRepTools::AddUVBounds(F,TopoDS::Edge(ex.Current()),B);
}
}
//=======================================================================
//function : AddUVBounds
//purpose :
//=======================================================================
void BRepTools::AddUVBounds(const TopoDS_Face& aF,
const TopoDS_Edge& aE,
Bnd_Box2d& aB)
{
Standard_Real aT1, aT2, aXmin, aYmin, aXmax, aYmax;
Standard_Real aUmin, aUmax, aVmin, aVmax;
Bnd_Box2d aBoxC, aBoxS;
TopLoc_Location aLoc;
//
const Handle(Geom2d_Curve) aC2D = BRep_Tool::CurveOnSurface(aE, aF, aT1, aT2);
if (aC2D.IsNull()) {
return;
}
//
BndLib_Add2dCurve::Add(aC2D, aT1, aT2, 0., aBoxC);
aBoxC.Get(aXmin, aYmin, aXmax, aYmax);
//
Handle(Geom_Surface) aS = BRep_Tool::Surface(aF, aLoc);
aS->Bounds(aUmin, aUmax, aVmin, aVmax);
if(aS->DynamicType() == STANDARD_TYPE(Geom_RectangularTrimmedSurface))
{
const Handle(Geom_RectangularTrimmedSurface) aSt =
Handle(Geom_RectangularTrimmedSurface)::DownCast(aS);
aS = aSt->BasisSurface();
}
//
if(!aS->IsUPeriodic())
{
Standard_Boolean isUPeriodic = Standard_False;
// Additional verification for U-periodicity for B-spline surfaces
// 1. Verify that the surface is U-closed (if such flag is false). Verification uses 2 points
// 2. Verify periodicity of surface inside UV-bounds of the edge. Verification uses 3 or 6 points.
if (aS->DynamicType() == STANDARD_TYPE(Geom_BSplineSurface) &&
(aXmin < aUmin || aXmax > aUmax))
{
Standard_Real aTol2 = 100 * Precision::Confusion() * Precision::Confusion();
isUPeriodic = Standard_True;
gp_Pnt P1, P2;
// 1. Verify that the surface is U-closed
if (!aS->IsUClosed())
{
Standard_Real aVStep = aVmax - aVmin;
for (Standard_Real aV = aVmin; aV <= aVmax; aV += aVStep)
{
P1 = aS->Value(aUmin, aV);
P2 = aS->Value(aUmax, aV);
if (P1.SquareDistance(P2) > aTol2)
{
isUPeriodic = Standard_False;
break;
}
}
}
// 2. Verify periodicity of surface inside UV-bounds of the edge
if (isUPeriodic) // the flag still not changed
{
Standard_Real aV = (aVmin + aVmax) * 0.5;
Standard_Real aU[6]; // values of U lying out of surface boundaries
Standard_Real aUpp[6]; // corresponding U-values plus/minus period
Standard_Integer aNbPnt = 0;
if (aXmin < aUmin)
{
aU[0] = aXmin;
aU[1] = (aXmin + aUmin) * 0.5;
aU[2] = aUmin;
aUpp[0] = aU[0] + aUmax - aUmin;
aUpp[1] = aU[1] + aUmax - aUmin;
aUpp[2] = aU[2] + aUmax - aUmin;
aNbPnt += 3;
}
if (aXmax > aUmax)
{
aU[aNbPnt] = aUmax;
aU[aNbPnt + 1] = (aXmax + aUmax) * 0.5;
aU[aNbPnt + 2] = aXmax;
aUpp[aNbPnt] = aU[aNbPnt] - aUmax + aUmin;
aUpp[aNbPnt + 1] = aU[aNbPnt + 1] - aUmax + aUmin;
aUpp[aNbPnt + 2] = aU[aNbPnt + 2] - aUmax + aUmin;
aNbPnt += 3;
}
for (Standard_Integer anInd = 0; anInd < aNbPnt; anInd++)
{
P1 = aS->Value(aU[anInd], aV);
P2 = aS->Value(aUpp[anInd], aV);
if (P1.SquareDistance(P2) > aTol2)
{
isUPeriodic = Standard_False;
break;
}
}
}
}
if (!isUPeriodic)
{
if((aXmin<aUmin) && (aUmin < aXmax))
{
aXmin=aUmin;
}
if((aXmin < aUmax) && (aUmax < aXmax))
{
aXmax=aUmax;
}
}
}
if(!aS->IsVPeriodic())
{
Standard_Boolean isVPeriodic = Standard_False;
// Additional verification for V-periodicity for B-spline surfaces
// 1. Verify that the surface is V-closed (if such flag is false). Verification uses 2 points
// 2. Verify periodicity of surface inside UV-bounds of the edge. Verification uses 3 or 6 points.
if (aS->DynamicType() == STANDARD_TYPE(Geom_BSplineSurface) &&
(aYmin < aVmin || aYmax > aVmax))
{
Standard_Real aTol2 = 100 * Precision::Confusion() * Precision::Confusion();
isVPeriodic = Standard_True;
gp_Pnt P1, P2;
// 1. Verify that the surface is V-closed
if (!aS->IsVClosed())
{
Standard_Real aUStep = aUmax - aUmin;
for (Standard_Real aU = aUmin; aU <= aUmax; aU += aUStep)
{
P1 = aS->Value(aU, aVmin);
P2 = aS->Value(aU, aVmax);
if (P1.SquareDistance(P2) > aTol2)
{
isVPeriodic = Standard_False;
break;
}
}
}
// 2. Verify periodicity of surface inside UV-bounds of the edge
if (isVPeriodic) // the flag still not changed
{
Standard_Real aU = (aUmin + aUmax) * 0.5;
Standard_Real aV[6]; // values of V lying out of surface boundaries
Standard_Real aVpp[6]; // corresponding V-values plus/minus period
Standard_Integer aNbPnt = 0;
if (aYmin < aVmin)
{
aV[0] = aYmin;
aV[1] = (aYmin + aVmin) * 0.5;
aV[2] = aVmin;
aVpp[0] = aV[0] + aVmax - aVmin;
aVpp[1] = aV[1] + aVmax - aVmin;
aVpp[2] = aV[2] + aVmax - aVmin;
aNbPnt += 3;
}
if (aYmax > aVmax)
{
aV[aNbPnt] = aVmax;
aV[aNbPnt + 1] = (aYmax + aVmax) * 0.5;
aV[aNbPnt + 2] = aYmax;
aVpp[aNbPnt] = aV[aNbPnt] - aVmax + aVmin;
aVpp[aNbPnt + 1] = aV[aNbPnt + 1] - aVmax + aVmin;
aVpp[aNbPnt + 2] = aV[aNbPnt + 2] - aVmax + aVmin;
aNbPnt += 3;
}
for (Standard_Integer anInd = 0; anInd < aNbPnt; anInd++)
{
P1 = aS->Value(aU, aV[anInd]);
P2 = aS->Value(aU, aVpp[anInd]);
if (P1.SquareDistance(P2) > aTol2)
{
isVPeriodic = Standard_False;
break;
}
}
}
}
if (!isVPeriodic)
{
if((aYmin<aVmin) && (aVmin < aYmax))
{
aYmin=aVmin;
}
if((aYmin < aVmax) && (aVmax < aYmax))
{
aYmax=aVmax;
}
}
}
aBoxS.Update(aXmin, aYmin, aXmax, aYmax);
aB.Add(aBoxS);
}
//=======================================================================
//function : Update
//purpose :
//=======================================================================
void BRepTools::Update(const TopoDS_Vertex&)
{
}
//=======================================================================
//function : Update
//purpose :
//=======================================================================
void BRepTools::Update(const TopoDS_Edge&)
{
}
//=======================================================================
//function : Update
//purpose :
//=======================================================================
void BRepTools::Update(const TopoDS_Wire&)
{
}
//=======================================================================
//function : Update
//purpose :
//=======================================================================
void BRepTools::Update(const TopoDS_Face& F)
{
if (!F.Checked()) {
UpdateFaceUVPoints(F);
F.TShape()->Checked(Standard_True);
}
}
//=======================================================================
//function : Update
//purpose :
//=======================================================================
void BRepTools::Update(const TopoDS_Shell& S)
{
TopExp_Explorer ex(S,TopAbs_FACE);
while (ex.More()) {
Update(TopoDS::Face(ex.Current()));
ex.Next();
}
}
//=======================================================================
//function : Update
//purpose :
//=======================================================================
void BRepTools::Update(const TopoDS_Solid& S)
{
TopExp_Explorer ex(S,TopAbs_FACE);
while (ex.More()) {
Update(TopoDS::Face(ex.Current()));
ex.Next();
}
}
//=======================================================================
//function : Update
//purpose :
//=======================================================================
void BRepTools::Update(const TopoDS_CompSolid& CS)
{
TopExp_Explorer ex(CS,TopAbs_FACE);
while (ex.More()) {
Update(TopoDS::Face(ex.Current()));
ex.Next();
}
}
//=======================================================================
//function : Update
//purpose :
//=======================================================================
void BRepTools::Update(const TopoDS_Compound& C)
{
TopExp_Explorer ex(C,TopAbs_FACE);
while (ex.More()) {
Update(TopoDS::Face(ex.Current()));
ex.Next();
}
}
//=======================================================================
//function : Update
//purpose :
//=======================================================================
void BRepTools::Update(const TopoDS_Shape& S)
{
switch (S.ShapeType()) {
case TopAbs_VERTEX :
Update(TopoDS::Vertex(S));
break;
case TopAbs_EDGE :
Update(TopoDS::Edge(S));
break;
case TopAbs_WIRE :
Update(TopoDS::Wire(S));
break;
case TopAbs_FACE :
Update(TopoDS::Face(S));
break;
case TopAbs_SHELL :
Update(TopoDS::Shell(S));
break;
case TopAbs_SOLID :
Update(TopoDS::Solid(S));
break;
case TopAbs_COMPSOLID :
Update(TopoDS::CompSolid(S));
break;
case TopAbs_COMPOUND :
Update(TopoDS::Compound(S));
break;
default:
break;
}
}
//=======================================================================
//function : UpdateFaceUVPoints
//purpose : reset the UV points of a Face
//=======================================================================
void BRepTools::UpdateFaceUVPoints(const TopoDS_Face& F)
{
// Recompute for each edge the two UV points in order to have the same
// UV point on connected edges.
// First edge loop, store the vertices in a Map with their 2d points
BRepTools_MapOfVertexPnt2d theVertices;
TopoDS_Iterator expE,expV;
TopoDS_Iterator EdgeIt,VertIt;
TColStd_SequenceOfReal aFSeq, aLSeq;
TColGeom2d_SequenceOfCurve aCSeq;
TopTools_SequenceOfShape aShSeq;
gp_Pnt2d P;
Standard_Integer i;
// a 3d tolerance for UV !!
Standard_Real tolerance = BRep_Tool::Tolerance(F);
TColgp_SequenceOfPnt2d emptySequence;
for (expE.Initialize(F); expE.More(); expE.Next()) {
if(expE.Value().ShapeType() != TopAbs_WIRE)
continue;
EdgeIt.Initialize(expE.Value());
for( ; EdgeIt.More(); EdgeIt.Next())
{
const TopoDS_Edge& E = TopoDS::Edge(EdgeIt.Value());
Standard_Real f,l;
Handle(Geom2d_Curve) C = BRep_Tool::CurveOnSurface(E,F,f,l);
aFSeq.Append(f);
aLSeq.Append(l);
aCSeq.Append(C);
aShSeq.Append(E);
if (C.IsNull()) continue;
for (expV.Initialize(E.Oriented(TopAbs_FORWARD));
expV.More(); expV.Next()) {
const TopoDS_Vertex& V = TopoDS::Vertex(expV.Value());
TopAbs_Orientation Vori = V.Orientation();
if ( Vori == TopAbs_INTERNAL ) {
continue;
}
Standard_Real p = BRep_Tool::Parameter(V,E,F);
C->D0(p,P);
if (!theVertices.IsBound(V))
theVertices.Bind(V,emptySequence);
TColgp_SequenceOfPnt2d& S = theVertices(V);
for (i = 1; i <= S.Length(); i++) {
if (P.Distance(S(i)) < tolerance) break;
}
if (i > S.Length())
S.Append(P);
}
}
}
// second edge loop, update the edges 2d points
TopoDS_Vertex Vf,Vl;
gp_Pnt2d Pf,Pl;
for(Standard_Integer j = 1; j <= aShSeq.Length(); j++)
{
const TopoDS_Edge& E = TopoDS::Edge(aShSeq.Value(j));
const Handle(Geom2d_Curve)& C = aCSeq.Value(j);
if (C.IsNull()) continue;
TopExp::Vertices(E,Vf,Vl);
if (Vf.IsNull()) {
Pf.SetCoord(RealLast(),RealLast());
}
else {
if ( Vf.Orientation() == TopAbs_INTERNAL ) {
continue;
}
const TColgp_SequenceOfPnt2d& seqf = theVertices(Vf);
if (seqf.Length() == 1)
Pf = seqf(1);
else {
C->D0(aFSeq.Value(j),Pf);
for (i = 1; i <= seqf.Length(); i++) {
if (Pf.Distance(seqf(i)) <= tolerance) {
Pf = seqf(i);
break;
}
}
}
}
if (Vl.IsNull()) {
Pl.SetCoord(RealLast(),RealLast());
}
else {
if ( Vl.Orientation() == TopAbs_INTERNAL ) {
continue;
}
const TColgp_SequenceOfPnt2d& seql = theVertices(Vl);
if (seql.Length() == 1)
Pl = seql(1);
else {
C->D0(aLSeq.Value(j),Pl);
for (i = 1; i <= seql.Length(); i++) {
if (Pl.Distance(seql(i)) <= tolerance) {
Pl = seql(i);
break;
}
}
}
}
// set the correct points
BRep_Tool::SetUVPoints(E,F,Pf,Pl);
}
}
//=======================================================================
//function : Compare
//purpose :
//=======================================================================
Standard_Boolean BRepTools::Compare(const TopoDS_Vertex& V1,
const TopoDS_Vertex& V2)
{
if (V1.IsSame(V2)) return Standard_True;
gp_Pnt p1 = BRep_Tool::Pnt(V1);
gp_Pnt p2 = BRep_Tool::Pnt(V2);
Standard_Real l = p1.Distance(p2);
if (l <= BRep_Tool::Tolerance(V1)) return Standard_True;
if (l <= BRep_Tool::Tolerance(V2)) return Standard_True;
return Standard_False;
}
//=======================================================================
//function : Compare
//purpose :
//=======================================================================
Standard_Boolean BRepTools::Compare(const TopoDS_Edge& E1,
const TopoDS_Edge& E2)
{
if (E1.IsSame(E2)) return Standard_True;
return Standard_False;
}
//=======================================================================
//function : OuterWire
//purpose :
//=======================================================================
TopoDS_Wire BRepTools::OuterWire(const TopoDS_Face& F)
{
TopoDS_Wire Wres;
TopExp_Explorer expw (F,TopAbs_WIRE);
if (expw.More()) {
Wres = TopoDS::Wire(expw.Current());
expw.Next();
if (expw.More()) {
Standard_Real UMin, UMax, VMin, VMax;
Standard_Real umin, umax, vmin, vmax;
BRepTools::UVBounds(F,Wres,UMin,UMax,VMin,VMax);
while (expw.More()) {
const TopoDS_Wire& W = TopoDS::Wire(expw.Current());
BRepTools::UVBounds(F,W,umin, umax, vmin, vmax);
if ((umin <= UMin) &&
(umax >= UMax) &&
(vmin <= VMin) &&
(vmax >= VMax)) {
Wres = W;
UMin = umin;
UMax = umax;
VMin = vmin;
VMax = vmax;
}
expw.Next();
}
}
}
return Wres;
}
//=======================================================================
//function : Map3DEdges
//purpose :
//=======================================================================
void BRepTools::Map3DEdges(const TopoDS_Shape& S,
TopTools_IndexedMapOfShape& M)
{
TopExp_Explorer Ex;
for (Ex.Init(S,TopAbs_EDGE); Ex.More(); Ex.Next()) {
if (!BRep_Tool::Degenerated(TopoDS::Edge(Ex.Current())))
M.Add(Ex.Current());
}
}
//=======================================================================
//function : Dump
//purpose :
//=======================================================================
void BRepTools::Dump(const TopoDS_Shape& Sh, Standard_OStream& S)
{
BRepTools_ShapeSet SS;
SS.Add(Sh);
SS.Dump(Sh,S);
SS.Dump(S);
}
//=======================================================================
//function : Write
//purpose :
//=======================================================================
void BRepTools::Write(const TopoDS_Shape& Sh, Standard_OStream& S,
const Handle(Message_ProgressIndicator)& PR)
{
BRepTools_ShapeSet SS;
SS.SetProgress(PR);
SS.Add(Sh);
SS.Write(S);
SS.Write(Sh,S);
}
//=======================================================================
//function : Read
//purpose :
//=======================================================================
void BRepTools::Read(TopoDS_Shape& Sh,
istream& S,
const BRep_Builder& B,
const Handle(Message_ProgressIndicator)& PR)
{
BRepTools_ShapeSet SS(B);
SS.SetProgress(PR);
SS.Read(S);
SS.Read(Sh,S);
}
//=======================================================================
//function : Write
//purpose :
//=======================================================================
Standard_Boolean BRepTools::Write(const TopoDS_Shape& Sh,
const Standard_CString File,
const Handle(Message_ProgressIndicator)& PR)
{
ofstream os;
OSD_OpenStream(os, File, ios::out);
if (!os.rdbuf()->is_open()) return Standard_False;
Standard_Boolean isGood = (os.good() && !os.eof());
if(!isGood)
return isGood;
BRepTools_ShapeSet SS;
SS.SetProgress(PR);
SS.Add(Sh);
os << "DBRep_DrawableShape\n"; // for easy Draw read
SS.Write(os);
isGood = os.good();
if(isGood )
SS.Write(Sh,os);
os.flush();
isGood = os.good();
errno = 0;
os.close();
isGood = os.good() && isGood && !errno;
return isGood;
}
//=======================================================================
//function : Read
//purpose :
//=======================================================================
Standard_Boolean BRepTools::Read(TopoDS_Shape& Sh,
const Standard_CString File,
const BRep_Builder& B,
const Handle(Message_ProgressIndicator)& PR)
{
filebuf fic;
istream in(&fic);
OSD_OpenFileBuf(fic,File,ios::in);
if(!fic.is_open()) return Standard_False;
BRepTools_ShapeSet SS(B);
SS.SetProgress(PR);
SS.Read(in);
if(!SS.NbShapes()) return Standard_False;
SS.Read(Sh,in);
return Standard_True;
}
//=======================================================================
//function : Clean
//purpose :
//=======================================================================
void BRepTools::Clean(const TopoDS_Shape& theShape)
{
BRep_Builder aBuilder;
Handle(Poly_Triangulation) aNullTriangulation;
Handle(Poly_PolygonOnTriangulation) aNullPoly;
if (theShape.IsNull())
return;
TopExp_Explorer aFaceIt(theShape, TopAbs_FACE);
for (; aFaceIt.More(); aFaceIt.Next())
{
const TopoDS_Face& aFace = TopoDS::Face(aFaceIt.Current());
TopLoc_Location aLoc;
const Handle(Poly_Triangulation)& aTriangulation =
BRep_Tool::Triangulation(aFace, aLoc);
if (aTriangulation.IsNull())
continue;
// Nullify edges
TopExp_Explorer aEdgeIt(aFace, TopAbs_EDGE);
for (; aEdgeIt.More(); aEdgeIt.Next())
{
const TopoDS_Edge& aEdge = TopoDS::Edge(aEdgeIt.Current());
aBuilder.UpdateEdge(aEdge, aNullPoly, aTriangulation, aLoc);
}
aBuilder.UpdateFace(aFace, aNullTriangulation);
}
}
//=======================================================================
//function : RemoveUnusedPCurves
//purpose :
//=======================================================================
void BRepTools::RemoveUnusedPCurves(const TopoDS_Shape& S)
{
TColStd_MapOfTransient UsedSurfaces;
TopExp_Explorer Explo(S, TopAbs_FACE);
for (; Explo.More(); Explo.Next())
{
TopoDS_Face aFace = TopoDS::Face(Explo.Current());
TopLoc_Location aLoc;
Handle(Geom_Surface) aSurf = BRep_Tool::Surface(aFace, aLoc);
UsedSurfaces.Add(aSurf);
}
TopTools_IndexedMapOfShape Emap;
TopExp::MapShapes(S, TopAbs_EDGE, Emap);
Standard_Integer i;
for (i = 1; i <= Emap.Extent(); i++)
{
const Handle(BRep_TEdge)& TE = *((Handle(BRep_TEdge)*) &Emap(i).TShape());
BRep_ListOfCurveRepresentation& lcr = TE -> ChangeCurves();
BRep_ListIteratorOfListOfCurveRepresentation itrep(lcr );
while (itrep.More())
{
Standard_Boolean ToRemove = Standard_False;
Handle(BRep_CurveRepresentation) CurveRep = itrep.Value();
if (CurveRep->IsCurveOnSurface())
{
Handle(Geom_Surface) aSurface = CurveRep->Surface();
if (!UsedSurfaces.Contains(aSurface))
ToRemove = Standard_True;
}
else if (CurveRep->IsRegularity())
{
Handle(Geom_Surface) Surf1 = CurveRep->Surface();
Handle(Geom_Surface) Surf2 = CurveRep->Surface2();
ToRemove = (!UsedSurfaces.Contains(Surf1) || !UsedSurfaces.Contains(Surf2));
}
if (ToRemove)
lcr.Remove(itrep);
else
itrep.Next();
}
}
}
//=======================================================================
//function : Triangulation
//purpose :
//=======================================================================
Standard_Boolean BRepTools::Triangulation(const TopoDS_Shape& S,
const Standard_Real deflec)
{
TopExp_Explorer exf, exe;
TopLoc_Location l;
Handle(Poly_Triangulation) T;
Handle(Poly_PolygonOnTriangulation) Poly;
for (exf.Init(S, TopAbs_FACE); exf.More(); exf.Next()) {
const TopoDS_Face& F = TopoDS::Face(exf.Current());
T = BRep_Tool::Triangulation(F, l);
if (T.IsNull() || (T->Deflection() > deflec))
return Standard_False;
for (exe.Init(F, TopAbs_EDGE); exe.More(); exe.Next()) {
const TopoDS_Edge& E = TopoDS::Edge(exe.Current());
Poly = BRep_Tool::PolygonOnTriangulation(E, T, l);
if (Poly.IsNull()) return Standard_False;
}
}
return Standard_True;
}
//=======================================================================
//function : IsReallyClosed
//purpose :
//=======================================================================
Standard_Boolean BRepTools::IsReallyClosed(const TopoDS_Edge& E,
const TopoDS_Face& F)
{
if (!BRep_Tool::IsClosed(E,F)) {
return Standard_False;
}
Standard_Integer nbocc = 0;
TopExp_Explorer exp;
for (exp.Init(F,TopAbs_EDGE);exp.More();exp.Next()) {
if (exp.Current().IsSame(E)) {
nbocc++;
}
}
return nbocc == 2;
}
//=======================================================================
//function : EvalAndUpdateTol
//purpose :
//=======================================================================
Standard_Real BRepTools::EvalAndUpdateTol(const TopoDS_Edge& theE,
const Handle(Geom_Curve)& C3d,
const Handle(Geom2d_Curve) C2d,
const Handle(Geom_Surface)& S,
const Standard_Real f,
const Standard_Real l)
{
Standard_Real newtol = 0.;
Standard_Real first = f, last = l;
//Set first, last to avoid ErrosStatus = 2 because of
//too strong checking of limits in class CheckCurveOnSurface
//
if(!C3d->IsPeriodic())
{
first = Max(first, C3d->FirstParameter());
last = Min(last, C3d->LastParameter());
}
if(!C2d->IsPeriodic())
{
first = Max(first, C2d->FirstParameter());
last = Min(last, C2d->LastParameter());
}
GeomLib_CheckCurveOnSurface CT(C3d, S, first, last);
CT.Perform(C2d);
if(CT.IsDone())
{
newtol = CT.MaxDistance();
}
else
{
if(CT.ErrorStatus() == 3 || (CT.ErrorStatus() == 2 &&
(C3d->IsPeriodic() || C2d->IsPeriodic())))
{
//Try to estimate by sample points
Standard_Integer nbint = 22;
Standard_Real dt = (last - first) / nbint;
dt = Max(dt, Precision::Confusion());
Standard_Real d, dmax = 0.;
gp_Pnt2d aP2d;
gp_Pnt aPC, aPS;
Standard_Integer cnt = 0;
Standard_Real t = first;
for(; t <= last; t += dt)
{
cnt++;
C2d->D0(t, aP2d);
C3d->D0(t, aPC);
S->D0(aP2d.X(), aP2d.Y(), aPS);
d = aPS.SquareDistance(aPC);
if(d > dmax)
{
dmax = d;
}
}
if(cnt < nbint + 1)
{
t = last;
C2d->D0(t, aP2d);
C3d->D0(t, aPC);
S->D0(aP2d.X(), aP2d.Y(), aPS);
d = aPS.SquareDistance(aPC);
if(d > dmax)
{
dmax = d;
}
}
newtol = 1.2 * Sqrt(dmax);
}
}
Standard_Real Tol = BRep_Tool::Tolerance(theE);
if(newtol > Tol)
{
Tol = newtol;
BRep_Builder B;
B.UpdateEdge(theE, Tol);
}
return Tol;
}
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