1 // Copyright (C) 2014-2015 EDF-R&D
2 // This library is free software; you can redistribute it and/or
3 // modify it under the terms of the GNU Lesser General Public
4 // License as published by the Free Software Foundation; either
5 // version 2.1 of the License, or (at your option) any later version.
7 // This library is distributed in the hope that it will be useful,
8 // but WITHOUT ANY WARRANTY; without even the implied warranty of
9 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
10 // Lesser General Public License for more details.
12 // You should have received a copy of the GNU Lesser General Public
13 // License along with this library; if not, write to the Free Software
14 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
19 #include "HYDROData_Profile.h"
21 #include "HYDROData_Document.h"
22 #include "HYDROData_Iterator.h"
23 #include "HYDROData_Tool.h"
24 #include "HYDROData_PolylineXY.h"
26 #include <boost/math/special_functions/fpclassify.hpp>
28 #include <BRepBuilderAPI_MakeEdge.hxx>
29 #include <BRepBuilderAPI_MakeWire.hxx>
30 #include <BRepBuilderAPI_MakePolygon.hxx>
32 #include <BRepExtrema_ExtCC.hxx>
34 #include <BRep_Tool.hxx>
39 #include <gp_Pnt2d.hxx>
41 #include <TDataStd_AsciiString.hxx>
42 #include <TDataStd_RealArray.hxx>
45 #include <TopoDS_Edge.hxx>
46 #include <TopoDS_Wire.hxx>
47 #include <TopoDS_Iterator.hxx>
49 #include <OSD_File.hxx>
50 #include <OSD_Protection.hxx>
53 #include <QStringList>
55 IMPLEMENT_STANDARD_HANDLE(HYDROData_Profile, HYDROData_Object)
56 IMPLEMENT_STANDARD_RTTIEXT(HYDROData_Profile, HYDROData_Object)
58 HYDROData_Profile::HYDROData_Profile()
59 : HYDROData_Object( Geom_3d )
63 HYDROData_Profile::~HYDROData_Profile()
67 QStringList HYDROData_Profile::DumpToPython( MapOfTreatedObjects& theTreatedObjects ) const
69 QStringList aResList = dumpObjectCreation( theTreatedObjects );
70 QString aProfileName = GetObjPyName();
72 //TCollection_AsciiString aFilePath = GetFilePath();
73 //if ( !aFilePath.IsEmpty() )
75 // aResList << QString( "%1.ImportFromFile( \"%2\" );" )
76 // .arg( aName ).arg( aFilePath.ToCString() );
79 bool anIsValidProfile = IsValid();
81 QStringList aPntsDefinition;
82 QString aPntsListName = HYDROData_Tool::GenerateNameForPython( theTreatedObjects, "profile_points" );
84 QString aGap = QString().fill( ' ', aPntsListName.length() + 5 );
85 if ( anIsValidProfile )
87 HYDROData_Profile::ProfilePoints aPointsList = GetProfilePoints( true );
88 for ( int k = 1, aNbPoints = aPointsList.Size(); k <= aNbPoints; ++k )
90 const ProfilePoint& aPoint = aPointsList.Value( k );
91 aPntsDefinition << QString( aGap + "gp_XYZ( %1, %2, %3 )%4" )
92 .arg( aPoint.X() ).arg( aPoint.Y() ).arg( aPoint.Z() )
93 .arg( ( k < aNbPoints ? "," : "" ) );
98 HYDROData_IPolyline::PointsList aPointsList = GetParametricPoints();
99 for ( int k = 1, aNbPoints = aPointsList.Size(); k <= aNbPoints; ++k )
101 const HYDROData_IPolyline::Point& aPoint = aPointsList.Value( k );
102 aPntsDefinition << QString( aGap + "gp_XY( %1, %2 )%3" )
103 .arg( aPoint.X() ).arg( aPoint.Y() )
104 .arg( ( k < aNbPoints ? "," : "" ) );
108 if ( !aPntsDefinition.isEmpty() )
110 QString& aFirstStr = aPntsDefinition.first();
111 aFirstStr = aFirstStr.trimmed();
112 aFirstStr.prepend( QString( "%1 = [ " ).arg( aPntsListName ) );
114 aPntsDefinition.last().append( " ];" );
116 aResList << aPntsDefinition;
118 aResList << QString( "%1.%3( %2 );" )
119 .arg( aProfileName ).arg( aPntsListName )
120 .arg( anIsValidProfile ? "SetProfilePoints" : "SetParametricPoints" );
122 aResList << QString( "" );
125 // Set a polyline type if it is not default
126 Handle(HYDROData_ProfileUZ) aPrf = GetProfileUZ( false );
127 if ( !aPrf.IsNull() )
129 HYDROData_IPolyline::SectionType aSecType = aPrf->GetSectionType( 0 );
130 if ( aSecType != HYDROData_IPolyline::SECTION_POLYLINE )
132 aResList << QString( "%1.GetProfileUZ().SetSectionType( 0, %2 );" )
133 .arg( aProfileName ).arg( "HYDROData_IPolyline.SECTION_SPLINE" );
134 aResList << QString( "" );
138 aResList << QString( "%1.Update();" ).arg( aProfileName );
139 aResList << QString( "" );
144 TopoDS_Shape HYDROData_Profile::GetTopShape() const
148 gp_XY aFirstPoint, aLastPoint;
149 if ( !GetLeftPoint( aFirstPoint, false ) || !GetRightPoint( aLastPoint, false ) )
152 gp_Pnt aPnt1( aFirstPoint.X(), aFirstPoint.Y(), 0 );
153 gp_Pnt aPnt2( aLastPoint.X(), aLastPoint.Y(), 0 );
155 BRepBuilderAPI_MakeEdge aMakeEdge( aPnt1, aPnt2 );
156 TopoDS_Edge anEdge = aMakeEdge;
158 BRepBuilderAPI_MakeWire aMakeWire( anEdge );
164 TopoDS_Shape HYDROData_Profile::GetShape3D() const
166 TopoDS_Shape aShape = getShape3D();
167 if( aShape.IsNull() )
168 aShape = CreateProfileWire( true );
172 TopoDS_Shape HYDROData_Profile::CreateProfileWire( bool canUseDefaultPoints ) const
175 Handle(HYDROData_ProfileUZ) aProfile = GetProfileUZ( false );
176 if ( !aProfile.IsNull() )
178 ProfilePoints aProfilePoints = GetProfilePoints( false, canUseDefaultPoints );
179 HYDROData_IPolyline::SectionType aSectionType = aProfile->GetSectionType( 0 );
181 aWire = HYDROData_PolylineXY::BuildWire( aSectionType, false, aProfilePoints );
186 void HYDROData_Profile::Update()
188 HYDROData_Object::Update();
190 TopoDS_Shape aShape = CreateProfileWire( true );
191 SetShape3D( aShape );
194 QColor HYDROData_Profile::DefaultFillingColor()
196 return QColor( Qt::transparent );
199 QColor HYDROData_Profile::DefaultBorderColor()
201 return QColor( Qt::black );
204 QColor HYDROData_Profile::getDefaultFillingColor() const
206 return DefaultFillingColor();
209 QColor HYDROData_Profile::getDefaultBorderColor() const
211 return DefaultBorderColor();
214 bool HYDROData_Profile::IsValid() const
216 gp_XY aFirstPoint, aLastPoint;
217 if ( !GetLeftPoint( aFirstPoint, false ) || !GetRightPoint( aLastPoint, false ) )
220 int aNbPoints = NbPoints();
221 return aNbPoints > 1;
224 void HYDROData_Profile::SetLeftPoint( const gp_XY& theGPoint, bool IsConvertFromGlobal )
226 TDF_Label aLabel = myLab.FindChild( DataTag_FirstPoint );
227 if ( aLabel.IsNull() )
230 Handle(HYDROData_Document) aDoc = HYDROData_Document::Document( Label() );
231 gp_XY aLPoint = theGPoint;
232 if( IsConvertFromGlobal )
233 aDoc->Transform( aLPoint, true );
235 Handle(TDataStd_RealArray) anArray;
236 if ( !aLabel.FindAttribute( TDataStd_RealArray::GetID(), anArray ) )
237 anArray = TDataStd_RealArray::Set( aLabel, 0, 1 );
239 anArray->SetValue( 0, aLPoint.X() );
240 anArray->SetValue( 1, aLPoint.Y() );
245 bool HYDROData_Profile::GetLeftPoint( gp_XY& thePoint, bool IsConvertToGlobal,
246 bool CanUseDefault ) const
248 HYDROData_ProfileUZ::PointsList aParametricPoints = GetParametricPoints();
249 if ( aParametricPoints.Length() < 2 )
252 thePoint = GetParametricPoints().First();
254 //thePoint.SetX( 0 );
255 thePoint.SetY( 0 ); //default left point of not-georeferenced profile
256 TDF_Label aLabel = myLab.FindChild( DataTag_FirstPoint, false );
257 if ( aLabel.IsNull() )
259 return CanUseDefault;
262 Handle(HYDROData_Document) aDoc = HYDROData_Document::Document( myLab );
263 Handle(TDataStd_RealArray) anArray;
264 if ( !aLabel.FindAttribute( TDataStd_RealArray::GetID(), anArray ) )
266 return CanUseDefault;
269 thePoint.SetX( anArray->Value( 0 ) );
270 thePoint.SetY( anArray->Value( 1 ) );
272 if( IsConvertToGlobal )
273 aDoc->Transform( thePoint, false );
278 void HYDROData_Profile::SetRightPoint( const gp_XY& theGPoint, bool IsConvertFromGlobal )
280 TDF_Label aLabel = myLab.FindChild( DataTag_LastPoint );
282 Handle(HYDROData_Document) aDoc = HYDROData_Document::Document( Label() );
283 gp_XY aLPoint = theGPoint;
284 if( IsConvertFromGlobal )
285 aDoc->Transform( aLPoint, true );
287 Handle(TDataStd_RealArray) anArray;
288 if ( !aLabel.FindAttribute( TDataStd_RealArray::GetID(), anArray ) )
289 anArray = TDataStd_RealArray::Set( aLabel, 0, 1 );
291 anArray->SetValue( 0, aLPoint.X() );
292 anArray->SetValue( 1, aLPoint.Y() );
297 bool HYDROData_Profile::GetRightPoint( gp_XY& thePoint, bool IsConvertToGlobal,
298 bool CanUseDefault ) const
300 HYDROData_ProfileUZ::PointsList aParametricPoints = GetParametricPoints();
301 if ( aParametricPoints.Length() < 2 )
304 thePoint = GetParametricPoints().Last();
307 TDF_Label aLabel = myLab.FindChild( DataTag_LastPoint, false );
308 if ( aLabel.IsNull() )
310 return CanUseDefault;
313 Handle(HYDROData_Document) aDoc = HYDROData_Document::Document( myLab );
314 Handle(TDataStd_RealArray) anArray;
315 if ( !aLabel.FindAttribute( TDataStd_RealArray::GetID(), anArray ) )
317 return CanUseDefault;
320 thePoint.SetX( anArray->Value( 0 ) );
321 thePoint.SetY( anArray->Value( 1 ) );
323 if( IsConvertToGlobal )
324 aDoc->Transform( thePoint, false );
329 void HYDROData_Profile::Invalidate()
331 TDF_Label aFirstLabel = myLab.FindChild( DataTag_FirstPoint, false );
332 if ( !aFirstLabel.IsNull() )
333 aFirstLabel.ForgetAllAttributes();
335 TDF_Label aLastLabel = myLab.FindChild( DataTag_LastPoint, false );
336 if ( !aLastLabel.IsNull() )
337 aLastLabel.ForgetAllAttributes();
342 Handle(HYDROData_ProfileUZ) HYDROData_Profile::GetProfileUZ( const bool theIsCreate ) const
344 Handle(HYDROData_ProfileUZ) aProfileUZ;
346 TDF_Label aLabel = myLab.FindChild( DataTag_ChildProfileUZ, theIsCreate );
347 if ( aLabel.IsNull() )
350 aProfileUZ = Handle(HYDROData_ProfileUZ)::DownCast( HYDROData_Iterator::Object( aLabel ) );
351 if ( aProfileUZ.IsNull() && theIsCreate )
353 aProfileUZ = Handle(HYDROData_ProfileUZ)::DownCast(
354 HYDROData_Iterator::CreateObject( aLabel, KIND_PROFILEUZ ) );
360 int HYDROData_Profile::NbPoints() const
362 Handle(HYDROData_ProfileUZ) aProfileUZ = GetProfileUZ( false );
363 return aProfileUZ.IsNull() ? 0 : aProfileUZ->NbPoints();
366 void HYDROData_Profile::RemovePoints()
368 Handle(HYDROData_ProfileUZ) aProfileUZ = GetProfileUZ( false );
369 if ( !aProfileUZ.IsNull() )
371 aProfileUZ->RemoveSections();
376 void HYDROData_Profile::SetParametricPoints( const HYDROData_ProfileUZ::PointsList& thePoints )
380 Handle(HYDROData_ProfileUZ) aProfileUZ = GetProfileUZ();
381 for ( int i = 1, n = thePoints.Length(); i <= n ; ++i )
383 const HYDROData_ProfileUZ::Point& aPoint = thePoints.Value( i );
384 aProfileUZ->AddPoint( 0, aPoint );
390 HYDROData_ProfileUZ::PointsList HYDROData_Profile::GetParametricPoints() const
392 Handle(HYDROData_ProfileUZ) aProfileUZ = GetProfileUZ( false );
393 return aProfileUZ.IsNull() ? HYDROData_ProfileUZ::PointsList() : aProfileUZ->GetPoints();
396 void HYDROData_Profile::SetProfilePoints( const ProfilePoints& thePoints, bool IsConvertFromGlobal )
399 if ( thePoints.Length() < 2 )
402 gp_XY aFirstPoint, aLastPoint;
404 Handle(HYDROData_Document) aDoc = HYDROData_Document::Document( Label() );
405 Handle(HYDROData_ProfileUZ) aProfileUZ = GetProfileUZ();
406 for ( int i = 1, n = thePoints.Length(); i <= n ; ++i )
408 ProfilePoint aPoint = thePoints.Value( i );
409 if( IsConvertFromGlobal )
410 aDoc->Transform( aPoint, true );
412 gp_XY aPointXY( aPoint.X(), aPoint.Y() );
415 aFirstPoint = aPointXY;
417 aLastPoint = aPointXY;
419 double aDistance = gp_Pnt2d( aFirstPoint ).Distance( aPointXY );
421 HYDROData_ProfileUZ::Point aParPoint( aDistance, aPoint.Z() );
422 aProfileUZ->AddPoint( 0, aParPoint );
425 SetLeftPoint( aFirstPoint, false );//already converted to local CS
426 SetRightPoint( aLastPoint, false );
429 HYDROData_Profile::ProfilePoints HYDROData_Profile::GetProfilePoints
430 ( bool IsConvertToGlobal, bool CanUseDefaultLeftRight ) const
432 ProfilePoints aResPoints;
434 gp_XY aFirstPoint, aLastPoint;
435 if ( !GetLeftPoint( aFirstPoint, IsConvertToGlobal, CanUseDefaultLeftRight ) ||
436 !GetRightPoint( aLastPoint, IsConvertToGlobal, CanUseDefaultLeftRight ) )
439 HYDROData_ProfileUZ::PointsList aParametricPoints = GetParametricPoints();
440 if ( aParametricPoints.Length() < 2 )
443 const HYDROData_ProfileUZ::Point& aFirstParPoint = aParametricPoints.First();
444 const HYDROData_ProfileUZ::Point& aLastParPoint = aParametricPoints.Last();
446 double aFullLength = aLastPoint.X() - aFirstPoint.X();
447 double aParFullLength = aLastParPoint.X() - aFirstParPoint.X();
449 // Add first point as is
450 aResPoints.Append( ProfilePoint( aFirstPoint.X(), aFirstPoint.Y(), aFirstParPoint.Y() ) );
452 // Compute all other points
453 for ( int i = 2, n = aParametricPoints.Length(); i < n ; ++i )
455 const HYDROData_ProfileUZ::Point& aParPoint = aParametricPoints.Value( i );
457 double aParPointDist = aParPoint.X() - aFirstParPoint.X();
458 double aRatio = aParPointDist / aParFullLength;
460 double aParX = aFirstPoint.X() * (1-aRatio) + aLastPoint.X() * aRatio;
461 double aParY = aFirstPoint.Y() * (1-aRatio) + aLastPoint.Y() * aRatio;
463 ProfilePoint aCompPoint( aParX, aParY, aParPoint.Y() );
464 aResPoints.Append( aCompPoint );
467 // Add last point as is
468 aResPoints.Append( ProfilePoint( aLastPoint.X(), aLastPoint.Y(), aLastParPoint.Y() ) );
473 void HYDROData_Profile::SetFilePath( const TCollection_AsciiString& theFilePath )
475 TDataStd_AsciiString::Set( myLab.FindChild( DataTag_FilePath ), theFilePath );
478 TCollection_AsciiString HYDROData_Profile::GetFilePath() const
480 TCollection_AsciiString aRes;
482 Handle(TDataStd_AsciiString) anAsciiStr;
483 if ( myLab.FindChild( DataTag_FilePath ).FindAttribute( TDataStd_AsciiString::GetID(), anAsciiStr ) )
484 aRes = anAsciiStr->Get();
489 int HYDROData_Profile::ImportFromFile( const Handle(HYDROData_Document)& theDoc,
490 const TCollection_AsciiString& theFileName,
491 NCollection_Sequence<int>& theBadProfilesIds )
493 if ( theDoc.IsNull() || theFileName.IsEmpty() )
496 OSD_File aFile( theFileName );
497 if ( !aFile.IsReadable() )
500 aFile.Open( OSD_ReadOnly, OSD_Protection() );
501 if ( !aFile.IsOpen() )
504 NCollection_Sequence<Handle(HYDROData_Profile)> aCreatedProfiles;
507 Handle(HYDROData_Profile) aNewProfile;
508 for ( ; !aFile.IsAtEnd(); ++aProfileId )
510 if ( aNewProfile.IsNull() )
511 aNewProfile = Handle(HYDROData_Profile)::DownCast( theDoc->CreateObject( KIND_PROFILE ) );
513 bool anIsRead = false;
514 if ( aNewProfile->ImportFromFile( aFile, &anIsRead ) )
516 aCreatedProfiles.Append( aNewProfile );
517 aNewProfile.Nullify();
521 theBadProfilesIds.Append( aProfileId );
525 if ( !aNewProfile.IsNull() )
526 aNewProfile->Remove();
531 for ( int i = 1, n = aCreatedProfiles.Length(); i <= n ; ++i )
533 Handle(HYDROData_Profile) aProfile = aCreatedProfiles.Value( i );
535 QString aProfileName = HYDROData_Tool::GenerateObjectName( theDoc, "Profile" );
536 aProfile->SetName( aProfileName );
538 aProfile->SetFilePath( theFileName );
540 aProfile->SetBorderColor( HYDROData_Profile::DefaultBorderColor() );
543 return aCreatedProfiles.Length();
546 bool HYDROData_Profile::ImportFromFile( const TCollection_AsciiString& theFileName,
552 // Try to open the file
553 OSD_File aFile( theFileName );
554 if ( !aFile.IsReadable() )
557 aFile.Open( OSD_ReadOnly, OSD_Protection() );
558 if ( !aFile.IsOpen() )
561 bool aRes = ImportFromFile( aFile, theIsRead );
569 SetFilePath( theFileName );
575 bool HYDROData_Profile::ImportFromFile( OSD_File& theFile,
581 if ( !theFile.IsOpen() )
586 bool anIsParametric = false;
587 bool anIsGeoref = false;
589 HYDROData_ProfileUZ::PointsList aPointsUZ;
590 ProfilePoints aPointsXYZ;
592 double aPrevVal = -DBL_MAX;
593 while ( !theFile.IsAtEnd() )
595 Standard_Integer aNbRead = 0;
596 TCollection_AsciiString aLine;
597 theFile.ReadLine( aLine, 1024, aNbRead );
599 aLine.LeftAdjust(); aLine.RightAdjust();
600 if ( aLine.IsEmpty() )
602 if ( !anIsParametric && !anIsGeoref )
603 continue; // Definition is not started yet
605 break; // Next profile started
608 // Set flag of read status to true
612 TCollection_AsciiString aValX = aLine.Token( " \t", 1 );
613 TCollection_AsciiString aValY = aLine.Token( " \t", 2 );
614 TCollection_AsciiString aValZ = aLine.Token( " \t", 3 );
616 if ( aValX.IsEmpty() || !aValX.IsRealValue() ||
617 aValY.IsEmpty() || !aValY.IsRealValue() )
623 if ( !anIsParametric && !anIsGeoref )
625 anIsParametric = aValZ.IsEmpty();
626 anIsGeoref = !aValZ.IsEmpty();
629 double aCoordX = aValX.RealValue();
630 double aCoordY = aValY.RealValue();
632 if ( boost::math::isnan( aCoordX ) || boost::math::isinf( aCoordX ) ||
633 boost::math::isnan( aCoordY ) || boost::math::isinf( aCoordY ) )
636 if ( anIsParametric )
638 if ( aCoordX < aPrevVal )
640 // Move back readed line
641 theFile.Seek( -( aNbRead + 1 ), OSD_FromHere );
645 HYDROData_ProfileUZ::Point aPoint( aCoordX, aCoordY );
646 aPointsUZ.Append( aPoint );
652 if ( aValZ.IsEmpty() || !aValZ.IsRealValue() )
658 double aCoordZ = aValZ.RealValue();
659 if ( boost::math::isnan( aCoordZ ) || boost::math::isinf( aCoordZ ) )
662 ProfilePoint aPoint( aCoordX, aCoordY, aCoordZ );
663 aPointsXYZ.Append( aPoint );
667 aRes = aRes && ( anIsParametric && !aPointsUZ.IsEmpty() ||
668 anIsGeoref && !aPointsXYZ.IsEmpty() );
671 // Update profile points
672 if ( anIsParametric )
674 SetParametricPoints( aPointsUZ );
676 else if ( anIsGeoref )
678 SetProfilePoints( aPointsXYZ, true );
687 void HYDROData_Profile::UpdateLocalCS( double theDx, double theDy )
689 gp_XY aDelta( theDx, theDy );
692 GetLeftPoint( aPnt, false );
694 SetLeftPoint( aPnt, false );
696 GetRightPoint( aPnt, false );
698 SetRightPoint( aPnt, false );
701 HYDROData_Profile::ProfilePoint HYDROData_Profile::GetBottomPoint() const
703 ProfilePoint aBottom;
705 // Get parametric points
706 HYDROData_ProfileUZ::PointsList aParametricPoints = GetParametricPoints();
707 if ( aParametricPoints.Length() < 1 ) {
711 // Calculate midvalue for U parameter
712 Standard_Real anUMidValue = aParametricPoints.First().X();
713 Standard_Real anUMinValue = anUMidValue;
714 Standard_Real anUMaxValue = anUMidValue;
716 for ( int i = 2, aNbPoints = aParametricPoints.Size(); i <= aNbPoints; i++ ) {
717 const HYDROData_IPolyline::Point& aParPoint = aParametricPoints.Value( i );
718 Standard_Real anU = aParPoint.X();
720 if ( anU < anUMinValue ) {
722 } else if ( anU > anUMaxValue ) {
727 anUMidValue = ( anUMinValue + anUMaxValue ) / 2;
729 // Find index of the parametric point with minimal Z value
730 int aBottomIndex = 1;
731 HYDROData_IPolyline::Point aParBottom = aParametricPoints.First();
733 for ( int i = 2, aNbPoints = aParametricPoints.Size(); i <= aNbPoints; i++ ) {
734 const HYDROData_IPolyline::Point& aParPoint = aParametricPoints.Value( i );
735 if ( aParPoint.Y() < aParBottom.Y() ) {
737 aParBottom = aParPoint;
738 } else if ( aParPoint.Y() == aParBottom.Y() ) {
739 // Check which point is neares to the U = 0.5
740 if ( fabs( aParPoint.X() - anUMidValue ) < fabs( aParBottom.X() - anUMidValue ) ) {
742 aParBottom = aParPoint;
747 // Find the corresponding profile point
748 ProfilePoints aProfilePoints = GetProfilePoints( false );
749 if ( aBottomIndex >= 1 && aBottomIndex <= aProfilePoints.Length() ) {
750 aBottom = aProfilePoints.Value( aBottomIndex );
756 HYDROData_Profile::ProfilePoint HYDROData_Profile::GetMiddlePoint( bool CanUseDefault ) const
758 ProfilePoint aMiddlePoint;
760 gp_XY aLeftPnt, aRightPnt;
761 if ( GetLeftPoint( aLeftPnt, true, CanUseDefault ) && GetRightPoint( aRightPnt, true, CanUseDefault ) ) {
762 gp_XYZ aPnt1( aLeftPnt.X(), aLeftPnt.Y(), 0. );
763 gp_XYZ aPnt2( aRightPnt.X(), aRightPnt.Y(), 0. );
764 gp_Pnt aMiddlePoint2d( 0.5 * ( aPnt1 + aPnt2 ) );
766 gp_Lin aMidLin( aMiddlePoint2d, gp::DZ() );
767 TopoDS_Edge aMidEdge = BRepLib_MakeEdge( aMidLin );
769 TopoDS_Iterator anIt( TopoDS::Wire( GetShape3D() ) );
770 for ( ; anIt.More(); anIt.Next()) {
771 const TopoDS_Edge& anEdge = TopoDS::Edge( anIt.Value() );
774 Standard_Real aStart, anEnd;
775 Handle(Geom_Curve) aCurve = BRep_Tool::Curve( anEdge, aStart, anEnd );
776 gp_Pnt aMiddlePointOnCurve = aCurve->Value( ( aStart + anEnd ) / 2 );
779 BRepExtrema_ExtCC ExtremaEE( aMidEdge, anEdge);
780 if (ExtremaEE.IsDone() && ExtremaEE.NbExt() != 0) {
781 for ( Standard_Integer i = 1; i <= ExtremaEE.NbExt(); i++ ) {
782 if ( ExtremaEE.SquareDistance(i) <= Precision::Confusion() ) {
783 aMiddlePoint = ExtremaEE.PointOnE1(i).XYZ();