[occt.git] / src / ShapeUpgrade / ShapeUpgrade_SplitSurfaceContinuity.cxx

// Created on: 1999-04-14
// Created by: Roman LYGIN
// Copyright (c) 1999-1999 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 <Geom_BSplineSurface.hxx>
#include <Geom_OffsetSurface.hxx>
#include <Geom_RectangularTrimmedSurface.hxx>
#include <Geom_SurfaceOfLinearExtrusion.hxx>
#include <Geom_SurfaceOfRevolution.hxx>
#include <Geom_SweptSurface.hxx>
#include <gp_Ax1.hxx>
#include <Precision.hxx>
#include <ShapeExtend.hxx>
#include <ShapeUpgrade.hxx>
#include <ShapeUpgrade_SplitCurve3dContinuity.hxx>
#include <ShapeUpgrade_SplitSurfaceContinuity.hxx>
#include <Standard_Type.hxx>
#include <TColGeom_HArray1OfCurve.hxx>
#include <TColGeom_HArray2OfSurface.hxx>
#include <TColStd_HArray1OfInteger.hxx>
#include <TColStd_HSequenceOfReal.hxx>

//======================================================================
//function : ShapeUpgrade_SplitSurface
//purpose  : 
//=======================================================================
ShapeUpgrade_SplitSurfaceContinuity::ShapeUpgrade_SplitSurfaceContinuity()
{
  myCriterion = GeomAbs_C1;
  myTolerance = Precision::Confusion();
  
}

//=======================================================================
//function : SetCrierion
//purpose  : 
//=======================================================================

 void ShapeUpgrade_SplitSurfaceContinuity::SetCriterion(const GeomAbs_Shape Criterion)
{
  myCriterion = Criterion;
  switch (myCriterion) {
    default         :
    case GeomAbs_C1 : myCont = 1; break;
    case GeomAbs_C2 : myCont = 2; break;
    case GeomAbs_C3 : myCont = 3; break;
    case GeomAbs_CN : myCont = 4; break;
  }
}

//=======================================================================
//function : SetTolerance
//purpose  : 
//=======================================================================

 void ShapeUpgrade_SplitSurfaceContinuity::SetTolerance(const Standard_Real Tol)
{
  myTolerance = Tol;
}

//=======================================================================
//function : Build
//purpose  : 
//=======================================================================

 void ShapeUpgrade_SplitSurfaceContinuity::Compute(const Standard_Boolean Segment) 
{
  if(!Segment) {
    Standard_Real UF,UL,VF,VL;
    mySurface->Bounds(UF,UL,VF,VL);
    if(!Precision::IsInfinite(UF)) myUSplitValues->SetValue(1,UF);
    if(!Precision::IsInfinite(UL)) myUSplitValues->SetValue(myUSplitValues->Length(),UL);
    if(!Precision::IsInfinite(VF)) myVSplitValues->SetValue(1,VF);
    if(!Precision::IsInfinite(VL)) myVSplitValues->SetValue(myVSplitValues->Length(),VL);
  }
  
  Standard_Real UFirst = myUSplitValues->Value(1);
  Standard_Real ULast  = myUSplitValues->Value(myUSplitValues->Length());
  Standard_Real VFirst = myVSplitValues->Value(1);
  Standard_Real VLast  = myVSplitValues->Value(myVSplitValues->Length());
  Standard_Real precision = Precision::Confusion();
//  if (ShapeUpgrade::Debug()) cout << "SplitSurfaceContinuity::Build" << endl;
  if(mySurface->Continuity() < myCriterion) 
    myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE2);
  if (myUSplitValues->Length() >2 || myVSplitValues->Length() >2 )
    myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE1);
  
  if (mySurface->IsKind(STANDARD_TYPE(Geom_SurfaceOfRevolution))) {      
    Handle(Geom_SurfaceOfRevolution) Surface = Handle(Geom_SurfaceOfRevolution)::DownCast(mySurface);
    if(Surface->Continuity() >=  myCriterion && myUSplitValues->Length() ==2 && myVSplitValues->Length() ==2 ) {
      return;
    }
    Handle(Geom_Curve) BasCurve = Surface->BasisCurve(); 
    ShapeUpgrade_SplitCurve3dContinuity spc;
    spc.Init(BasCurve,VFirst,VLast);
    spc.SetCriterion(myCriterion);
    spc.SetTolerance(myTolerance);
    spc.SetSplitValues(myVSplitValues);
    spc.Compute();
    myVSplitValues->Clear();
    myVSplitValues->ChangeSequence() = spc.SplitValues()->Sequence();
    if ( spc.Status ( ShapeExtend_DONE1 ) )
      myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE1 );
    if ( spc.Status ( ShapeExtend_DONE2 ) )
      myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE2 );
    if ( spc.Status ( ShapeExtend_DONE3 ) )
      myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
    return;
  }   
  if (mySurface->IsKind(STANDARD_TYPE(Geom_SurfaceOfLinearExtrusion))) {
    Handle(Geom_SurfaceOfLinearExtrusion) Surface = Handle(Geom_SurfaceOfLinearExtrusion)::DownCast(mySurface);
   if(Surface->Continuity() >=  myCriterion && myUSplitValues->Length() ==2 && myVSplitValues->Length() == 2) {
      return;
    }
    Handle(Geom_Curve) BasCurve = Surface->BasisCurve();
    ShapeUpgrade_SplitCurve3dContinuity spc;
    spc.Init(BasCurve,UFirst,ULast);
    spc.SetCriterion(myCriterion);
    spc.SetTolerance(myTolerance);
    spc.SetSplitValues(myUSplitValues);
    spc.Compute(); 
    myUSplitValues->Clear();
    myUSplitValues->ChangeSequence() = spc.SplitValues()->Sequence();
    if ( spc.Status ( ShapeExtend_DONE1 ) )
      myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE1 );
    if ( spc.Status ( ShapeExtend_DONE2 ) )
      myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE2 );
    if ( spc.Status ( ShapeExtend_DONE3 ) ) {
      myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
      Handle(Geom_Curve) aNewBascurve = spc.GetCurve();
      Surface->SetBasisCurve(aNewBascurve);
    }
    return;
  }
  
  if (mySurface->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface))) {
    Handle(Geom_RectangularTrimmedSurface) tmp = Handle(Geom_RectangularTrimmedSurface)::DownCast (mySurface);
    if(tmp->Continuity() >=  myCriterion && myUSplitValues->Length() ==2 && myVSplitValues->Length() == 2) {
      return;
    }
    Standard_Real U1,U2,V1,V2;
    tmp->Bounds(U1,U2,V1,V2);
    Handle(Geom_Surface) theSurf = tmp->BasisSurface();
    ShapeUpgrade_SplitSurfaceContinuity sps;
    sps.Init(theSurf,Max(U1,UFirst),Min(U2,ULast),Max(V1,VFirst),Min(V2,VLast));
    sps.SetUSplitValues(myUSplitValues);
    sps.SetVSplitValues(myVSplitValues);
    sps.SetTolerance(myTolerance);
    sps.SetCriterion(myCriterion);
    sps.Compute(Standard_True);
    myUSplitValues->Clear();
    myUSplitValues->ChangeSequence() = sps.USplitValues()->Sequence();
    myVSplitValues->Clear();
    myVSplitValues->ChangeSequence() = sps.VSplitValues()->Sequence();
    myStatus |= sps.myStatus;
    return;
  }
  else if (mySurface->IsKind(STANDARD_TYPE(Geom_OffsetSurface))) {
    GeomAbs_Shape BasCriterion;
    switch (myCriterion) {
      default         :
      case GeomAbs_C1 : BasCriterion = GeomAbs_C2; break;
      case GeomAbs_C2 : BasCriterion = GeomAbs_C3; break;
      case GeomAbs_C3 : //if (ShapeUpgrade::Debug()) cout<<". this criterion is not suitable for a Offset Surface"<<endl;; 
#ifdef OCCT_DEBUG
	                cout << "Warning: ShapeUpgrade_SplitSurfaceContinuity: criterion C3 for Offset surface" << endl; 
#endif
      case GeomAbs_CN : BasCriterion = GeomAbs_CN; break;
      
    }
    Handle(Geom_OffsetSurface) tmp = Handle(Geom_OffsetSurface)::DownCast (mySurface);
    Handle(Geom_Surface) theSurf = tmp->BasisSurface();
    if(theSurf->Continuity() >=  BasCriterion && myUSplitValues->Length() ==2 && myVSplitValues->Length() == 2) {
      return;
    }
    ShapeUpgrade_SplitSurfaceContinuity sps;
    sps.Init(theSurf,UFirst,ULast,VFirst,VLast);
    sps.SetUSplitValues(myUSplitValues);
    sps.SetVSplitValues(myVSplitValues);
    sps.SetTolerance(myTolerance);
    sps.SetCriterion(BasCriterion);
    sps.Compute(Standard_True);
    myUSplitValues->Clear();
    myUSplitValues->ChangeSequence() = sps.USplitValues()->Sequence();
    myVSplitValues->Clear();
    myVSplitValues->ChangeSequence() = sps.VSplitValues()->Sequence();
    myStatus |= sps.myStatus;
    return;
  }
  
  Handle(Geom_BSplineSurface) MyBSpline;
  if(mySurface->IsKind(STANDARD_TYPE(Geom_BSplineSurface)))
    MyBSpline = Handle(Geom_BSplineSurface)::DownCast(mySurface->Copy());
  if (MyBSpline.IsNull()) {
//    if (ShapeUpgrade::Debug()) cout<<". "<<" Surface is not a Bspline"<<endl;
    return;
  } 
  if(mySurface->Continuity() >= myCriterion) {
    return;
  }
  
  // it is a BSplineSurface
  Standard_Integer UDeg=MyBSpline->UDegree();
  Standard_Integer VDeg=MyBSpline->VDegree();
  Standard_Integer NbUKnots= MyBSpline->NbUKnots(); 
  Standard_Integer UFirstInd =MyBSpline->FirstUKnotIndex()+1,
  ULastInd = MyBSpline->LastUKnotIndex()-1,
  VFirstInd =MyBSpline->FirstVKnotIndex()+1,
  VLastInd = MyBSpline->LastVKnotIndex()-1;
  Standard_Integer NbVKnots= MyBSpline->NbVKnots();
  
//  if (ShapeUpgrade::Debug()) cout<<". NbUKnots="<<NbUKnots<<endl;
  if (NbUKnots>2) {
    // Only the internal knots are checked.
    Standard_Integer iknot= UFirstInd;
    for(Standard_Integer j =2; j <= myUSplitValues->Length(); j++) {
      ULast =  myUSplitValues->Value(j);
      
      for (; iknot <= ULastInd; iknot++) {
	Standard_Real valknot = MyBSpline->UKnot(iknot);
	if(valknot <= UFirst + precision) continue;
	  if( valknot >= ULast - precision) break;
	Standard_Integer Continuity=UDeg-MyBSpline->UMultiplicity(iknot);
	if (Continuity < myCont) { 
	  // At this knot, the Surface is C0; try to remove Knot.
	  Standard_Integer newMultiplicity=UDeg - myCont;
	  Standard_Boolean corrected = Standard_False;
	  if ( newMultiplicity >= 0 )
	    corrected=MyBSpline->RemoveUKnot(iknot, newMultiplicity, myTolerance);
	  if (corrected && newMultiplicity > 0) {
		Continuity=UDeg-MyBSpline->UMultiplicity(iknot);
		corrected = (Continuity >= myCont);
		}
	  if (corrected) {
	    // at this knot, the continuity is now C1. Nothing else to do.
//	    if (ShapeUpgrade::Debug()) cout<<". Correction at UKnot "<<iknot<<endl;
            // PTV 15.05.2002 decrease iknot and ULastIndex values if knot removed
            if (newMultiplicity ==0) { iknot--; ULastInd--; }
	    myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
	  }
	  else {
	    // impossible to force C1 within the tolerance: 
	    // this knot will be a splitting value.
	    Standard_Real u=MyBSpline->UKnot(iknot);
	    myUSplitValues->InsertBefore(j++,u);
	    myNbResultingRow++;
//	    if (ShapeUpgrade::Debug()) cout<<". Splitting at Knot "<<iknot<<endl;
	  }
	}
      }
      UFirst = ULast;
    }
  }
//  if (ShapeUpgrade::Debug()) cout<<". NbVKnots="<<NbVKnots<<endl;
  if (NbVKnots>2) {
    // Only the internal knots are checked.
    Standard_Integer iknot=VFirstInd;
    for(Standard_Integer j1 =2; j1 <= myVSplitValues->Length(); j1++) {
      VLast =  myVSplitValues->Value(j1);
      for (; iknot <= VLastInd; iknot++) {
	Standard_Real valknot = MyBSpline->VKnot(iknot);
	if(valknot <= VFirst + precision) continue;
	if( valknot >= VLast - precision) break;
	Standard_Integer Continuity=VDeg-MyBSpline->VMultiplicity(iknot);
	if (Continuity < myCont) { 
	  // At this knot, the Surface is C0; try to remove Knot.
	  Standard_Integer newMultiplicity=VDeg - myCont;
	  Standard_Boolean corrected = Standard_False;
	  if( newMultiplicity >= 0 )
	    corrected=MyBSpline->RemoveVKnot(iknot, newMultiplicity, myTolerance);
	  if (corrected && newMultiplicity > 0) {
		Continuity=VDeg-MyBSpline->VMultiplicity(iknot);
		corrected = (Continuity >= myCont);
	  }
	  if (corrected ) {
	    // at this knot, the continuity is now Criterion. Nothing else to do.
//	    if (ShapeUpgrade::Debug()) cout<<". Correction at VKnot "<<iknot<<endl;
            // PTV 15.05.2002 decrease iknot and ULastIndex values if knot removed
            if (newMultiplicity ==0) { iknot--; VLastInd--; }
	    myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
	  }
	  else {
	    // this knot will be a splitting value.
	    Standard_Real v=MyBSpline->VKnot(iknot);
	    myVSplitValues->InsertBefore(j1++,v);
	    myNbResultingCol++;
//	    if (ShapeUpgrade::Debug()) cout<<". Splitting at Knot "<<iknot<<endl;
	  }
	}
      }
      VFirst = VLast;
    }
  }
  if ( Status ( ShapeExtend_DONE3 ) ) {
    mySurface = MyBSpline;
  }

  if (myUSplitValues->Length() >2 || myVSplitValues->Length() >2 )
    myStatus |= ShapeExtend::EncodeStatus (ShapeExtend_DONE1);
}
Commit	Line	Data
b311480e	1	// Created on: 1999-04-14
	2	// Created by: Roman LYGIN
	3	// Copyright (c) 1999-1999 Matra Datavision
973c2be1	4	// Copyright (c) 1999-2014 OPEN CASCADE SAS
b311480e	5	//
973c2be1	6	// This file is part of Open CASCADE Technology software library.
b311480e	7	//
d5f74e42	8	// This library is free software; you can redistribute it and/or modify it under
d5f74e42	9	// the terms of the GNU Lesser General Public License version 2.1 as published
973c2be1	10	// by the Free Software Foundation, with special exception defined in the file
	11	// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
	12	// distribution for complete text of the license and disclaimer of any warranty.
b311480e	13	//
973c2be1	14	// Alternatively, this file may be used under the terms of Open CASCADE
973c2be1	15	// commercial license or contractual agreement.
7fd59977	16
42cf5bc1	17
7fd59977	18	#include <Geom_BSplineSurface.hxx>
42cf5bc1	19	#include <Geom_OffsetSurface.hxx>
	20	#include <Geom_RectangularTrimmedSurface.hxx>
	21	#include <Geom_SurfaceOfLinearExtrusion.hxx>
	22	#include <Geom_SurfaceOfRevolution.hxx>
	23	#include <Geom_SweptSurface.hxx>
	24	#include <gp_Ax1.hxx>
7fd59977	25	#include <Precision.hxx>
42cf5bc1	26	#include <ShapeExtend.hxx>
7fd59977	27	#include <ShapeUpgrade.hxx>
42cf5bc1	28	#include <ShapeUpgrade_SplitCurve3dContinuity.hxx>
	29	#include <ShapeUpgrade_SplitSurfaceContinuity.hxx>
	30	#include <Standard_Type.hxx>
	31	#include <TColGeom_HArray1OfCurve.hxx>
7fd59977	32	#include <TColGeom_HArray2OfSurface.hxx>
7fd59977	33	#include <TColStd_HArray1OfInteger.hxx>
7fd59977	34	#include <TColStd_HSequenceOfReal.hxx>
42cf5bc1	35
7fd59977	36	//======================================================================
	37	//function : ShapeUpgrade_SplitSurface
	38	//purpose :
	39	//=======================================================================
7fd59977	40	ShapeUpgrade_SplitSurfaceContinuity::ShapeUpgrade_SplitSurfaceContinuity()
	41	{
	42	myCriterion = GeomAbs_C1;
	43	myTolerance = Precision::Confusion();
	44
	45	}
	46
	47	//=======================================================================
	48	//function : SetCrierion
	49	//purpose :
	50	//=======================================================================
	51
	52	void ShapeUpgrade_SplitSurfaceContinuity::SetCriterion(const GeomAbs_Shape Criterion)
	53	{
	54	myCriterion = Criterion;
	55	switch (myCriterion) {
	56	default :
	57	case GeomAbs_C1 : myCont = 1; break;
	58	case GeomAbs_C2 : myCont = 2; break;
	59	case GeomAbs_C3 : myCont = 3; break;
	60	case GeomAbs_CN : myCont = 4; break;
	61	}
	62	}
	63
	64	//=======================================================================
	65	//function : SetTolerance
	66	//purpose :
	67	//=======================================================================
	68
	69	void ShapeUpgrade_SplitSurfaceContinuity::SetTolerance(const Standard_Real Tol)
	70	{
	71	myTolerance = Tol;
	72	}
	73
	74	//=======================================================================
	75	//function : Build
	76	//purpose :
	77	//=======================================================================
	78
	79	void ShapeUpgrade_SplitSurfaceContinuity::Compute(const Standard_Boolean Segment)
	80	{
	81	if(!Segment) {
	82	Standard_Real UF,UL,VF,VL;
	83	mySurface->Bounds(UF,UL,VF,VL);
	84	if(!Precision::IsInfinite(UF)) myUSplitValues->SetValue(1,UF);
	85	if(!Precision::IsInfinite(UL)) myUSplitValues->SetValue(myUSplitValues->Length(),UL);
	86	if(!Precision::IsInfinite(VF)) myVSplitValues->SetValue(1,VF);
	87	if(!Precision::IsInfinite(VL)) myVSplitValues->SetValue(myVSplitValues->Length(),VL);
	88	}
	89
	90	Standard_Real UFirst = myUSplitValues->Value(1);
	91	Standard_Real ULast = myUSplitValues->Value(myUSplitValues->Length());
	92	Standard_Real VFirst = myVSplitValues->Value(1);
	93	Standard_Real VLast = myVSplitValues->Value(myVSplitValues->Length());
	94	Standard_Real precision = Precision::Confusion();
	95	// if (ShapeUpgrade::Debug()) cout << "SplitSurfaceContinuity::Build" << endl;
	96	if(mySurface->Continuity() < myCriterion)
	97	myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE2);
	98	if (myUSplitValues->Length() >2 \|\| myVSplitValues->Length() >2 )
	99	myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE1);
	100
	101	if (mySurface->IsKind(STANDARD_TYPE(Geom_SurfaceOfRevolution))) {
	102	Handle(Geom_SurfaceOfRevolution) Surface = Handle(Geom_SurfaceOfRevolution)::DownCast(mySurface);
	103	if(Surface->Continuity() >= myCriterion && myUSplitValues->Length() ==2 && myVSplitValues->Length() ==2 ) {
104	return;
105	}
106	Handle(Geom_Curve) BasCurve = Surface->BasisCurve();
107	ShapeUpgrade_SplitCurve3dContinuity spc;
108	spc.Init(BasCurve,VFirst,VLast);
109	spc.SetCriterion(myCriterion);
110	spc.SetTolerance(myTolerance);
111	spc.SetSplitValues(myVSplitValues);
112	spc.Compute();
113	myVSplitValues->Clear();
114	myVSplitValues->ChangeSequence() = spc.SplitValues()->Sequence();
115	if ( spc.Status ( ShapeExtend_DONE1 ) )
116	myStatus \|= ShapeExtend::EncodeStatus ( ShapeExtend_DONE1 );
117	if ( spc.Status ( ShapeExtend_DONE2 ) )
118	myStatus \|= ShapeExtend::EncodeStatus ( ShapeExtend_DONE2 );
119	if ( spc.Status ( ShapeExtend_DONE3 ) )
120	myStatus \|= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
121	return;
122	}
123	if (mySurface->IsKind(STANDARD_TYPE(Geom_SurfaceOfLinearExtrusion))) {
124	Handle(Geom_SurfaceOfLinearExtrusion) Surface = Handle(Geom_SurfaceOfLinearExtrusion)::DownCast(mySurface);
125	if(Surface->Continuity() >= myCriterion && myUSplitValues->Length() ==2 && myVSplitValues->Length() == 2) {
126	return;
127	}
128	Handle(Geom_Curve) BasCurve = Surface->BasisCurve();
129	ShapeUpgrade_SplitCurve3dContinuity spc;
130	spc.Init(BasCurve,UFirst,ULast);
131	spc.SetCriterion(myCriterion);
132	spc.SetTolerance(myTolerance);
133	spc.SetSplitValues(myUSplitValues);
134	spc.Compute();
135	myUSplitValues->Clear();
136	myUSplitValues->ChangeSequence() = spc.SplitValues()->Sequence();
137	if ( spc.Status ( ShapeExtend_DONE1 ) )
138	myStatus \|= ShapeExtend::EncodeStatus ( ShapeExtend_DONE1 );
139	if ( spc.Status ( ShapeExtend_DONE2 ) )
140	myStatus \|= ShapeExtend::EncodeStatus ( ShapeExtend_DONE2 );
141	if ( spc.Status ( ShapeExtend_DONE3 ) ) {
142	myStatus \|= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
143	Handle(Geom_Curve) aNewBascurve = spc.GetCurve();
144	Surface->SetBasisCurve(aNewBascurve);
145	}
146	return;
147	}
148
149	if (mySurface->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface))) {
150	Handle(Geom_RectangularTrimmedSurface) tmp = Handle(Geom_RectangularTrimmedSurface)::DownCast (mySurface);
151	if(tmp->Continuity() >= myCriterion && myUSplitValues->Length() ==2 && myVSplitValues->Length() == 2) {
152	return;
153	}
154	Standard_Real U1,U2,V1,V2;
155	tmp->Bounds(U1,U2,V1,V2);
156	Handle(Geom_Surface) theSurf = tmp->BasisSurface();
157	ShapeUpgrade_SplitSurfaceContinuity sps;
158	sps.Init(theSurf,Max(U1,UFirst),Min(U2,ULast),Max(V1,VFirst),Min(V2,VLast));
159	sps.SetUSplitValues(myUSplitValues);
160	sps.SetVSplitValues(myVSplitValues);
161	sps.SetTolerance(myTolerance);
162	sps.SetCriterion(myCriterion);
163	sps.Compute(Standard_True);
164	myUSplitValues->Clear();
165	myUSplitValues->ChangeSequence() = sps.USplitValues()->Sequence();
166	myVSplitValues->Clear();
167	myVSplitValues->ChangeSequence() = sps.VSplitValues()->Sequence();
168	myStatus \|= sps.myStatus;
169	return;
170	}
171	else if (mySurface->IsKind(STANDARD_TYPE(Geom_OffsetSurface))) {
172	GeomAbs_Shape BasCriterion;
173	switch (myCriterion) {
174	default :
175	case GeomAbs_C1 : BasCriterion = GeomAbs_C2; break;
176	case GeomAbs_C2 : BasCriterion = GeomAbs_C3; break;
177	case GeomAbs_C3 : //if (ShapeUpgrade::Debug()) cout<<". this criterion is not suitable for a Offset Surface"<<endl;;
0797d9d3	178	#ifdef OCCT_DEBUG
7fd59977	179	cout << "Warning: ShapeUpgrade_SplitSurfaceContinuity: criterion C3 for Offset surface" << endl;
	180	#endif
	181	case GeomAbs_CN : BasCriterion = GeomAbs_CN; break;
	182
	183	}
	184	Handle(Geom_OffsetSurface) tmp = Handle(Geom_OffsetSurface)::DownCast (mySurface);
	185	Handle(Geom_Surface) theSurf = tmp->BasisSurface();
	186	if(theSurf->Continuity() >= BasCriterion && myUSplitValues->Length() ==2 && myVSplitValues->Length() == 2) {
	187	return;
	188	}
	189	ShapeUpgrade_SplitSurfaceContinuity sps;
	190	sps.Init(theSurf,UFirst,ULast,VFirst,VLast);
	191	sps.SetUSplitValues(myUSplitValues);
	192	sps.SetVSplitValues(myVSplitValues);
	193	sps.SetTolerance(myTolerance);
	194	sps.SetCriterion(BasCriterion);
	195	sps.Compute(Standard_True);
	196	myUSplitValues->Clear();
	197	myUSplitValues->ChangeSequence() = sps.USplitValues()->Sequence();
	198	myVSplitValues->Clear();
	199	myVSplitValues->ChangeSequence() = sps.VSplitValues()->Sequence();
	200	myStatus \|= sps.myStatus;
	201	return;
	202	}
	203
	204	Handle(Geom_BSplineSurface) MyBSpline;
	205	if(mySurface->IsKind(STANDARD_TYPE(Geom_BSplineSurface)))
	206	MyBSpline = Handle(Geom_BSplineSurface)::DownCast(mySurface->Copy());
	207	if (MyBSpline.IsNull()) {
	208	// if (ShapeUpgrade::Debug()) cout<<". "<<" Surface is not a Bspline"<<endl;
	209	return;
	210	}
	211	if(mySurface->Continuity() >= myCriterion) {
	212	return;
	213	}
	214
	215	// it is a BSplineSurface
	216	Standard_Integer UDeg=MyBSpline->UDegree();
	217	Standard_Integer VDeg=MyBSpline->VDegree();
	218	Standard_Integer NbUKnots= MyBSpline->NbUKnots();
	219	Standard_Integer UFirstInd =MyBSpline->FirstUKnotIndex()+1,
	220	ULastInd = MyBSpline->LastUKnotIndex()-1,
	221	VFirstInd =MyBSpline->FirstVKnotIndex()+1,
	222	VLastInd = MyBSpline->LastVKnotIndex()-1;
	223	Standard_Integer NbVKnots= MyBSpline->NbVKnots();
	224
	225	// if (ShapeUpgrade::Debug()) cout<<". NbUKnots="<<NbUKnots<<endl;
	226	if (NbUKnots>2) {
	227	// Only the internal knots are checked.
	228	Standard_Integer iknot= UFirstInd;
	229	for(Standard_Integer j =2; j <= myUSplitValues->Length(); j++) {
	230	ULast = myUSplitValues->Value(j);
	231
	232	for (; iknot <= ULastInd; iknot++) {
	233	Standard_Real valknot = MyBSpline->UKnot(iknot);
	234	if(valknot <= UFirst + precision) continue;
	235	if( valknot >= ULast - precision) break;
	236	Standard_Integer Continuity=UDeg-MyBSpline->UMultiplicity(iknot);
	237	if (Continuity < myCont) {
	238	// At this knot, the Surface is C0; try to remove Knot.
	239	Standard_Integer newMultiplicity=UDeg - myCont;
	240	Standard_Boolean corrected = Standard_False;
	241	if ( newMultiplicity >= 0 )
	242	corrected=MyBSpline->RemoveUKnot(iknot, newMultiplicity, myTolerance);
243	if (corrected && newMultiplicity > 0) {
244	Continuity=UDeg-MyBSpline->UMultiplicity(iknot);
245	corrected = (Continuity >= myCont);
246	}
247	if (corrected) {
248	// at this knot, the continuity is now C1. Nothing else to do.
249	// if (ShapeUpgrade::Debug()) cout<<". Correction at UKnot "<<iknot<<endl;
250	// PTV 15.05.2002 decrease iknot and ULastIndex values if knot removed
251	if (newMultiplicity ==0) { iknot--; ULastInd--; }
252	myStatus \|= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
253	}
254	else {
255	// impossible to force C1 within the tolerance:
256	// this knot will be a splitting value.
257	Standard_Real u=MyBSpline->UKnot(iknot);
258	myUSplitValues->InsertBefore(j++,u);
259	myNbResultingRow++;
260	// if (ShapeUpgrade::Debug()) cout<<". Splitting at Knot "<<iknot<<endl;
261	}
262	}
263	}
264	UFirst = ULast;
265	}
266	}
267	// if (ShapeUpgrade::Debug()) cout<<". NbVKnots="<<NbVKnots<<endl;
268	if (NbVKnots>2) {
269	// Only the internal knots are checked.
270	Standard_Integer iknot=VFirstInd;
271	for(Standard_Integer j1 =2; j1 <= myVSplitValues->Length(); j1++) {
272	VLast = myVSplitValues->Value(j1);
273	for (; iknot <= VLastInd; iknot++) {
274	Standard_Real valknot = MyBSpline->VKnot(iknot);
275	if(valknot <= VFirst + precision) continue;
276	if( valknot >= VLast - precision) break;
277	Standard_Integer Continuity=VDeg-MyBSpline->VMultiplicity(iknot);
278	if (Continuity < myCont) {
279	// At this knot, the Surface is C0; try to remove Knot.
280	Standard_Integer newMultiplicity=VDeg - myCont;
281	Standard_Boolean corrected = Standard_False;
282	if( newMultiplicity >= 0 )
283	corrected=MyBSpline->RemoveVKnot(iknot, newMultiplicity, myTolerance);
284	if (corrected && newMultiplicity > 0) {
285	Continuity=VDeg-MyBSpline->VMultiplicity(iknot);
286	corrected = (Continuity >= myCont);
287	}
288	if (corrected ) {
289	// at this knot, the continuity is now Criterion. Nothing else to do.
290	// if (ShapeUpgrade::Debug()) cout<<". Correction at VKnot "<<iknot<<endl;
291	// PTV 15.05.2002 decrease iknot and ULastIndex values if knot removed
292	if (newMultiplicity ==0) { iknot--; VLastInd--; }
293	myStatus \|= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
294	}
295	else {
296	// this knot will be a splitting value.
297	Standard_Real v=MyBSpline->VKnot(iknot);
298	myVSplitValues->InsertBefore(j1++,v);
299	myNbResultingCol++;
300	// if (ShapeUpgrade::Debug()) cout<<". Splitting at Knot "<<iknot<<endl;
301	}
302	}
303	}
304	VFirst = VLast;
305	}
306	}
307	if ( Status ( ShapeExtend_DONE3 ) ) {
308	mySurface = MyBSpline;
309	}
310
311	if (myUSplitValues->Length() >2 \|\| myVSplitValues->Length() >2 )
312	myStatus \|= ShapeExtend::EncodeStatus (ShapeExtend_DONE1);
313	}
314
315
316
317