[occt.git] / src / ChFiKPart / ChFiKPart_ComputeData_FilPlnCon.cxx

// File:	ChFiKPart_CompData_PlnCon.cxx
// Created:	Thu Feb  3 15:04:25 1994
// Author:	Isabelle GRIGNON
//		<isg@zerox>

#include <ChFiKPart_ComputeData.jxx>
#include <Precision.hxx>
#include <gp.hxx>
#include <gp_Pnt2d.hxx>
#include <gp_Dir2d.hxx>
#include <gp_Lin2d.hxx>
#include <gp_Pnt.hxx>
#include <gp_Dir.hxx>
#include <gp_Vec.hxx>
#include <gp_Lin.hxx>
#include <gp_Ax2.hxx>
#include <gp_Ax3.hxx>
#include <gp_Circ.hxx>
#include <gp_Pln.hxx>
#include <gp_Cone.hxx>

#include <ElCLib.hxx>
#include <ElSLib.hxx>

#include <Geom2d_Line.hxx>
#include <Geom2d_Circle.hxx>
#include <Geom_Line.hxx>
#include <Geom_Circle.hxx>
#include <Geom_ToroidalSurface.hxx>
#include <Geom_SphericalSurface.hxx>

#include <IntAna_QuadQuadGeo.hxx>

#include <ChFiKPart_ComputeData_Fcts.hxx>

//=======================================================================
//function : MakeFillet
//purpose  : case cone/plane or plane/cone.
//=======================================================================

Standard_Boolean ChFiKPart_MakeFillet(TopOpeBRepDS_DataStructure& DStr,
				      const Handle(ChFiDS_SurfData)& Data, 
				      const gp_Pln& Pln, 
				      const gp_Cone& Con, 
				      const Standard_Real fu,
				      const Standard_Real lu,
				      const TopAbs_Orientation Or1,
				      const TopAbs_Orientation Or2,
				      const Standard_Real Radius, 
				      const gp_Circ& Spine, 
				      const Standard_Real First, 
				      const TopAbs_Orientation Ofpl,
				      const Standard_Boolean plandab)
{
//calculate the fillet (torus or sphere).
  Standard_Boolean c1sphere = Standard_False;
  gp_Ax3 PosPl = Pln.Position();
  gp_Dir Dpnat = PosPl.XDirection().Crossed(PosPl.YDirection());
  gp_Dir Dp = Dpnat;
  gp_Dir Df = Dp;
  if (Or1 == TopAbs_REVERSED) { Dp.Reverse(); }
  if (Ofpl == TopAbs_REVERSED) { Df.Reverse(); }

  gp_Pnt Or = Con.Location();
  Standard_Real u,v;
  ElSLib::PlaneParameters(PosPl,Or,u,v);
  gp_Pnt2d c2dPln(u,v);
  ElSLib::PlaneD0(u,v,PosPl,Or);
  gp_Pnt cPln = Or;
  Or.SetCoord(Or.X()+Radius*Dp.X(),
	      Or.Y()+Radius*Dp.Y(),
	      Or.Z()+Radius*Dp.Z());

  gp_Pnt PtSp;
  gp_Vec DSp;
  ElCLib::D1(First,Spine,PtSp,DSp);
  IntAna_QuadQuadGeo CInt (Pln,Con,Precision::Angular(),
			   Precision::Confusion());
  gp_Pnt Pv;
  if (CInt.IsDone()) {
    //The origin of the fillet is set at the start point on the  
    //guideline.
    Pv = ElCLib::Value(ElCLib::Parameter(CInt.Circle(1),PtSp),
		       CInt.Circle(1));
  }
  else { return Standard_False; }
  gp_Dir Dx(gp_Vec(cPln,Pv));
  gp_Dir Dy(DSp);
  ElSLib::Parameters(Con,Pv,u,v);
  gp_Pnt PtCon;
  gp_Vec Vu,Vv;
  ElSLib::D1(u,v,Con,PtCon,Vu,Vv);
  gp_Dir Dc(Vu.Crossed(Vv));
  if (Or2 == TopAbs_REVERSED) { Dc.Reverse(); }
  gp_Dir Dz = Dp;

  gp_Pnt pp(Pv.X()+Dc.X(),Pv.Y()+Dc.Y(),Pv.Z()+Dc.Z());
  ElSLib::PlaneParameters(PosPl,pp,u,v);
  ElSLib::PlaneD0(u,v,PosPl,pp);
  gp_Dir ddp(gp_Vec(Pv,pp));
  ElSLib::Parameters(Con,Pv,u,v);
  gp_Vec dcu,dcv;
  ElSLib::D1(u,v,Con,pp,dcu,dcv);
  gp_Dir ddc(dcv);
  if(ddc.Dot(Dp) < 0.) ddc.Reverse();
  Standard_Real Ang = ddp.Angle(ddc);
  Standard_Real Rabio = Radius/Tan(Ang/2);
  Standard_Real Maxrad = cPln.Distance(Pv);
  Standard_Real Rad;
  Standard_Boolean dedans = Dx.Dot(Dc) <= 0. ; 
  if( dedans ){ 
    if (!plandab){ Dz.Reverse(); } 
    Rad = Maxrad - Rabio;
    if(Abs(Rad) <= Precision::Confusion()){ c1sphere = Standard_True; }
    else if(Rad < 0){ 
      cout<<"the fillet does not pass"<<endl; 
      return Standard_False;
    }
  }
  else { 
    if (plandab){ Dz.Reverse(); } 
    Rad = Maxrad + Rabio; 
  }
  gp_Ax3 FilAx3(Or,Dz,Dx);
  if (FilAx3.YDirection().Dot(Dy) <= 0.){ FilAx3.YReverse(); }

  if(c1sphere) {
    Handle(Geom_SphericalSurface) 
      gsph = new Geom_SphericalSurface(FilAx3,Radius);
    Data->ChangeSurf(ChFiKPart_IndexSurfaceInDS(gsph,DStr));
  }
  else{
    Handle(Geom_ToroidalSurface) 
      gtor = new Geom_ToroidalSurface(FilAx3,Rad,Radius);
    Data->ChangeSurf(ChFiKPart_IndexSurfaceInDS(gtor,DStr));
  }
  
  // It is checked if the orientation of the fillet is the same  
  // as of the faces.
  gp_Pnt P,PP;
  gp_Vec deru,derv;
  P.SetCoord(cPln.X()+Rad*Dx.X(),
	     cPln.Y()+Rad*Dx.Y(),
	     cPln.Z()+Rad*Dx.Z());
  if(c1sphere){
    ElSLib::SphereParameters(FilAx3,Rad,P,u,v);
    ElSLib::SphereD1(u,v,FilAx3,Rad,PP,deru,derv);
  }  
  else{
    ElSLib::TorusParameters(FilAx3,Rad,Radius,P,u,v);
    ElSLib::TorusD1(u,v,FilAx3,Rad,Radius,PP,deru,derv);
    if(!plandab && Ang < PI/2 && dedans) v = v + 2*PI;
  }  
  gp_Pnt2d p2dFil(0.,v);
  gp_Dir norFil(deru.Crossed(derv));
  Standard_Boolean toreverse = ( norFil.Dot(Df) <= 0. );
  if (toreverse) { Data->ChangeOrientation() = TopAbs_REVERSED; }
  else { Data->ChangeOrientation() = TopAbs_FORWARD; }

  // FaceInterferences are loaded with pcurves and curves 3d.
  // ---------------------------------------------------------------

  // The plane face.
  // --------------

  Handle(Geom2d_Circle) GCirc2dPln;
  Handle(Geom_Circle) GCircPln;
  gp_Ax2 circAx2 = FilAx3.Ax2();
  if(!c1sphere){
    ElSLib::PlaneParameters(PosPl,P,u,v);
    gp_Pnt2d p2dPln(u,v);
    gp_Dir2d d2d(DSp.Dot(PosPl.XDirection()),DSp.Dot(PosPl.YDirection()));
    gp_Ax22d ax2dPln(c2dPln,gp_Dir2d(gp_Vec2d(c2dPln,p2dPln)),d2d);
    gp_Circ2d circ2dPln(ax2dPln,Rad);
    GCirc2dPln = new Geom2d_Circle(circ2dPln);
    circAx2.SetLocation(cPln);
    gp_Circ circPln(circAx2,Rad);
    GCircPln = new Geom_Circle(circPln);
  }
  gp_Lin2d lin2dFil(p2dFil,gp::DX2d());
  Handle(Geom2d_Line) GLin2dFil1 = new Geom2d_Line(lin2dFil);
  toreverse = ( norFil.Dot(Dpnat) <= 0. );
  TopAbs_Orientation trans; 
  if ((toreverse && plandab) || (!toreverse && !plandab) ){ 
    trans = TopAbs_FORWARD; 
  }
  else { 
    trans = TopAbs_REVERSED; 
  }
  if(plandab){
    Data->ChangeInterferenceOnS1().
      SetInterference(ChFiKPart_IndexCurveInDS(GCircPln,DStr),
		      trans,GCirc2dPln,GLin2dFil1);
  }
  else{
    Data->ChangeInterferenceOnS2().
      SetInterference(ChFiKPart_IndexCurveInDS(GCircPln,DStr),
		      trans,GCirc2dPln,GLin2dFil1);
  }

  // The conic face.
  // ----------------

  P.SetCoord(Pv.X()+Rabio*ddc.X(),
	     Pv.Y()+Rabio*ddc.Y(),
	     Pv.Z()+Rabio*ddc.Z());
  if(c1sphere){
    ElSLib::SphereParameters(FilAx3,Radius,P,u,v);
    ElSLib::SphereD1(u,v,FilAx3,Radius,PP,deru,derv);
  }  
  else{
    ElSLib::TorusParameters(FilAx3,Rad,Radius,P,u,v);
    ElSLib::TorusD1(u,v,FilAx3,Rad,Radius,PP,deru,derv);
    if(plandab && Ang < PI/2 && dedans) v = v + 2*PI;
  }  
  norFil = deru.Crossed(derv);
  p2dFil.SetCoord(0.,v);
  lin2dFil.SetLocation(p2dFil);
  Handle(Geom2d_Line) GLin2dFil2 = new Geom2d_Line(lin2dFil);
  ElSLib::Parameters(Con,P,u,v);
  Standard_Real tol = Precision::PConfusion();
  Standard_Boolean careaboutsens = 0;
  if(Abs(lu - fu - 2*PI) < tol) careaboutsens = 1;
  if(u >= fu - tol && u < fu) u = fu;
  if(u <= lu + tol && u > lu) u = lu;
  if(u < fu || u > lu) u = ElCLib::InPeriod(u,fu,fu + 2*PI);
  ElSLib::D1(u,v,Con,PP,deru,derv);
  gp_Dir norCon = deru.Crossed(derv);
  gp_Dir2d d2dCon = gp::DX2d();
  if( deru.Dot(Dy) < 0. ){
    d2dCon.Reverse(); 
    if(careaboutsens && Abs(fu-u)<tol) u = lu;
  }
  else if(careaboutsens && Abs(lu-u)<tol) u = fu;
  gp_Pnt2d p2dCon(u,v);
  gp_Lin2d lin2dCon(p2dCon,d2dCon);
  Handle(Geom2d_Line) GLin2dCon = new Geom2d_Line(lin2dCon);
  Standard_Real scal = gp_Vec(Dp).Dot(gp_Vec(Pv,P));
  PP.SetCoord(cPln.X()+scal*Dp.X(),
	      cPln.Y()+scal*Dp.Y(),
	      cPln.Z()+scal*Dp.Z());
  circAx2.SetLocation(PP);
  gp_Circ circCon(circAx2,P.Distance(PP));
  Handle(Geom_Circle) GCircCon = new Geom_Circle(circCon);
  toreverse = ( norFil.Dot(norCon) <= 0. );
  if ((toreverse && plandab) || (!toreverse && !plandab) ){ 
    trans = TopAbs_REVERSED; 
  }
  else { 
    trans = TopAbs_FORWARD; 
  }
  if(plandab){
    Data->ChangeInterferenceOnS2().
      SetInterference(ChFiKPart_IndexCurveInDS(GCircCon,DStr),
		      trans,GLin2dCon,GLin2dFil2);
  }
  else{
    Data->ChangeInterferenceOnS1().
      SetInterference(ChFiKPart_IndexCurveInDS(GCircCon,DStr),
		      trans,GLin2dCon,GLin2dFil2);
  }
  return Standard_True;
}
Commit	Line	Data
7fd59977	1	// File: ChFiKPart_CompData_PlnCon.cxx
	2	// Created: Thu Feb 3 15:04:25 1994
	3	// Author: Isabelle GRIGNON
	4	// <isg@zerox>
	5
	6	#include <ChFiKPart_ComputeData.jxx>
	7	#include <Precision.hxx>
	8	#include <gp.hxx>
	9	#include <gp_Pnt2d.hxx>
	10	#include <gp_Dir2d.hxx>
	11	#include <gp_Lin2d.hxx>
	12	#include <gp_Pnt.hxx>
	13	#include <gp_Dir.hxx>
	14	#include <gp_Vec.hxx>
	15	#include <gp_Lin.hxx>
	16	#include <gp_Ax2.hxx>
	17	#include <gp_Ax3.hxx>
	18	#include <gp_Circ.hxx>
	19	#include <gp_Pln.hxx>
	20	#include <gp_Cone.hxx>
	21
	22	#include <ElCLib.hxx>
	23	#include <ElSLib.hxx>
	24
	25	#include <Geom2d_Line.hxx>
	26	#include <Geom2d_Circle.hxx>
	27	#include <Geom_Line.hxx>
	28	#include <Geom_Circle.hxx>
	29	#include <Geom_ToroidalSurface.hxx>
	30	#include <Geom_SphericalSurface.hxx>
	31
	32	#include <IntAna_QuadQuadGeo.hxx>
	33
	34	#include <ChFiKPart_ComputeData_Fcts.hxx>
	35
	36	//=======================================================================
	37	//function : MakeFillet
81bba717	38	//purpose : case cone/plane or plane/cone.
7fd59977	39	//=======================================================================
	40
	41	Standard_Boolean ChFiKPart_MakeFillet(TopOpeBRepDS_DataStructure& DStr,
	42	const Handle(ChFiDS_SurfData)& Data,
	43	const gp_Pln& Pln,
	44	const gp_Cone& Con,
	45	const Standard_Real fu,
	46	const Standard_Real lu,
	47	const TopAbs_Orientation Or1,
	48	const TopAbs_Orientation Or2,
	49	const Standard_Real Radius,
	50	const gp_Circ& Spine,
	51	const Standard_Real First,
	52	const TopAbs_Orientation Ofpl,
	53	const Standard_Boolean plandab)
	54	{
81bba717	55	//calculate the fillet (torus or sphere).
7fd59977	56	Standard_Boolean c1sphere = Standard_False;
	57	gp_Ax3 PosPl = Pln.Position();
	58	gp_Dir Dpnat = PosPl.XDirection().Crossed(PosPl.YDirection());
	59	gp_Dir Dp = Dpnat;
	60	gp_Dir Df = Dp;
	61	if (Or1 == TopAbs_REVERSED) { Dp.Reverse(); }
	62	if (Ofpl == TopAbs_REVERSED) { Df.Reverse(); }
	63
	64	gp_Pnt Or = Con.Location();
	65	Standard_Real u,v;
	66	ElSLib::PlaneParameters(PosPl,Or,u,v);
	67	gp_Pnt2d c2dPln(u,v);
	68	ElSLib::PlaneD0(u,v,PosPl,Or);
	69	gp_Pnt cPln = Or;
	70	Or.SetCoord(Or.X()+Radius*Dp.X(),
	71	Or.Y()+Radius*Dp.Y(),
	72	Or.Z()+Radius*Dp.Z());
	73
	74	gp_Pnt PtSp;
	75	gp_Vec DSp;
	76	ElCLib::D1(First,Spine,PtSp,DSp);
	77	IntAna_QuadQuadGeo CInt (Pln,Con,Precision::Angular(),
	78	Precision::Confusion());
	79	gp_Pnt Pv;
	80	if (CInt.IsDone()) {
81bba717	81	//The origin of the fillet is set at the start point on the
81bba717	82	//guideline.
7fd59977	83	Pv = ElCLib::Value(ElCLib::Parameter(CInt.Circle(1),PtSp),
	84	CInt.Circle(1));
	85	}
	86	else { return Standard_False; }
	87	gp_Dir Dx(gp_Vec(cPln,Pv));
	88	gp_Dir Dy(DSp);
	89	ElSLib::Parameters(Con,Pv,u,v);
	90	gp_Pnt PtCon;
	91	gp_Vec Vu,Vv;
	92	ElSLib::D1(u,v,Con,PtCon,Vu,Vv);
	93	gp_Dir Dc(Vu.Crossed(Vv));
	94	if (Or2 == TopAbs_REVERSED) { Dc.Reverse(); }
	95	gp_Dir Dz = Dp;
	96
	97	gp_Pnt pp(Pv.X()+Dc.X(),Pv.Y()+Dc.Y(),Pv.Z()+Dc.Z());
	98	ElSLib::PlaneParameters(PosPl,pp,u,v);
	99	ElSLib::PlaneD0(u,v,PosPl,pp);
	100	gp_Dir ddp(gp_Vec(Pv,pp));
	101	ElSLib::Parameters(Con,Pv,u,v);
	102	gp_Vec dcu,dcv;
	103	ElSLib::D1(u,v,Con,pp,dcu,dcv);
	104	gp_Dir ddc(dcv);
	105	if(ddc.Dot(Dp) < 0.) ddc.Reverse();
	106	Standard_Real Ang = ddp.Angle(ddc);
	107	Standard_Real Rabio = Radius/Tan(Ang/2);
	108	Standard_Real Maxrad = cPln.Distance(Pv);
	109	Standard_Real Rad;
	110	Standard_Boolean dedans = Dx.Dot(Dc) <= 0. ;
	111	if( dedans ){
	112	if (!plandab){ Dz.Reverse(); }
	113	Rad = Maxrad - Rabio;
	114	if(Abs(Rad) <= Precision::Confusion()){ c1sphere = Standard_True; }
	115	else if(Rad < 0){
81bba717	116	cout<<"the fillet does not pass"<<endl;
7fd59977	117	return Standard_False;
	118	}
	119	}
	120	else {
	121	if (plandab){ Dz.Reverse(); }
	122	Rad = Maxrad + Rabio;
	123	}
	124	gp_Ax3 FilAx3(Or,Dz,Dx);
	125	if (FilAx3.YDirection().Dot(Dy) <= 0.){ FilAx3.YReverse(); }
	126
	127	if(c1sphere) {
	128	Handle(Geom_SphericalSurface)
	129	gsph = new Geom_SphericalSurface(FilAx3,Radius);
	130	Data->ChangeSurf(ChFiKPart_IndexSurfaceInDS(gsph,DStr));
	131	}
	132	else{
	133	Handle(Geom_ToroidalSurface)
	134	gtor = new Geom_ToroidalSurface(FilAx3,Rad,Radius);
	135	Data->ChangeSurf(ChFiKPart_IndexSurfaceInDS(gtor,DStr));
	136	}
	137
81bba717	138	// It is checked if the orientation of the fillet is the same
81bba717	139	// as of the faces.
7fd59977	140	gp_Pnt P,PP;
	141	gp_Vec deru,derv;
	142	P.SetCoord(cPln.X()+Rad*Dx.X(),
	143	cPln.Y()+Rad*Dx.Y(),
	144	cPln.Z()+Rad*Dx.Z());
	145	if(c1sphere){
	146	ElSLib::SphereParameters(FilAx3,Rad,P,u,v);
	147	ElSLib::SphereD1(u,v,FilAx3,Rad,PP,deru,derv);
	148	}
	149	else{
	150	ElSLib::TorusParameters(FilAx3,Rad,Radius,P,u,v);
	151	ElSLib::TorusD1(u,v,FilAx3,Rad,Radius,PP,deru,derv);
	152	if(!plandab && Ang < PI/2 && dedans) v = v + 2*PI;
	153	}
	154	gp_Pnt2d p2dFil(0.,v);
	155	gp_Dir norFil(deru.Crossed(derv));
	156	Standard_Boolean toreverse = ( norFil.Dot(Df) <= 0. );
	157	if (toreverse) { Data->ChangeOrientation() = TopAbs_REVERSED; }
	158	else { Data->ChangeOrientation() = TopAbs_FORWARD; }
	159
81bba717	160	// FaceInterferences are loaded with pcurves and curves 3d.
7fd59977	161	// ---------------------------------------------------------------
7fd59977	162
81bba717	163	// The plane face.
7fd59977	164	// --------------
	165
	166	Handle(Geom2d_Circle) GCirc2dPln;
	167	Handle(Geom_Circle) GCircPln;
	168	gp_Ax2 circAx2 = FilAx3.Ax2();
	169	if(!c1sphere){
	170	ElSLib::PlaneParameters(PosPl,P,u,v);
	171	gp_Pnt2d p2dPln(u,v);
	172	gp_Dir2d d2d(DSp.Dot(PosPl.XDirection()),DSp.Dot(PosPl.YDirection()));
	173	gp_Ax22d ax2dPln(c2dPln,gp_Dir2d(gp_Vec2d(c2dPln,p2dPln)),d2d);
	174	gp_Circ2d circ2dPln(ax2dPln,Rad);
	175	GCirc2dPln = new Geom2d_Circle(circ2dPln);
	176	circAx2.SetLocation(cPln);
	177	gp_Circ circPln(circAx2,Rad);
	178	GCircPln = new Geom_Circle(circPln);
	179	}
	180	gp_Lin2d lin2dFil(p2dFil,gp::DX2d());
	181	Handle(Geom2d_Line) GLin2dFil1 = new Geom2d_Line(lin2dFil);
	182	toreverse = ( norFil.Dot(Dpnat) <= 0. );
	183	TopAbs_Orientation trans;
	184	if ((toreverse && plandab) \|\| (!toreverse && !plandab) ){
	185	trans = TopAbs_FORWARD;
	186	}
	187	else {
	188	trans = TopAbs_REVERSED;
	189	}
	190	if(plandab){
	191	Data->ChangeInterferenceOnS1().
	192	SetInterference(ChFiKPart_IndexCurveInDS(GCircPln,DStr),
	193	trans,GCirc2dPln,GLin2dFil1);
	194	}
	195	else{
	196	Data->ChangeInterferenceOnS2().
	197	SetInterference(ChFiKPart_IndexCurveInDS(GCircPln,DStr),
	198	trans,GCirc2dPln,GLin2dFil1);
	199	}
	200
81bba717	201	// The conic face.
7fd59977	202	// ----------------
	203
	204	P.SetCoord(Pv.X()+Rabio*ddc.X(),
	205	Pv.Y()+Rabio*ddc.Y(),
	206	Pv.Z()+Rabio*ddc.Z());
	207	if(c1sphere){
	208	ElSLib::SphereParameters(FilAx3,Radius,P,u,v);
	209	ElSLib::SphereD1(u,v,FilAx3,Radius,PP,deru,derv);
	210	}
	211	else{
	212	ElSLib::TorusParameters(FilAx3,Rad,Radius,P,u,v);
	213	ElSLib::TorusD1(u,v,FilAx3,Rad,Radius,PP,deru,derv);
	214	if(plandab && Ang < PI/2 && dedans) v = v + 2*PI;
	215	}
	216	norFil = deru.Crossed(derv);
	217	p2dFil.SetCoord(0.,v);
	218	lin2dFil.SetLocation(p2dFil);
	219	Handle(Geom2d_Line) GLin2dFil2 = new Geom2d_Line(lin2dFil);
	220	ElSLib::Parameters(Con,P,u,v);
	221	Standard_Real tol = Precision::PConfusion();
	222	Standard_Boolean careaboutsens = 0;
	223	if(Abs(lu - fu - 2*PI) < tol) careaboutsens = 1;
	224	if(u >= fu - tol && u < fu) u = fu;
	225	if(u <= lu + tol && u > lu) u = lu;
	226	if(u < fu \|\| u > lu) u = ElCLib::InPeriod(u,fu,fu + 2*PI);
	227	ElSLib::D1(u,v,Con,PP,deru,derv);
	228	gp_Dir norCon = deru.Crossed(derv);
	229	gp_Dir2d d2dCon = gp::DX2d();
	230	if( deru.Dot(Dy) < 0. ){
	231	d2dCon.Reverse();
	232	if(careaboutsens && Abs(fu-u)<tol) u = lu;
	233	}
	234	else if(careaboutsens && Abs(lu-u)<tol) u = fu;
	235	gp_Pnt2d p2dCon(u,v);
	236	gp_Lin2d lin2dCon(p2dCon,d2dCon);
	237	Handle(Geom2d_Line) GLin2dCon = new Geom2d_Line(lin2dCon);
	238	Standard_Real scal = gp_Vec(Dp).Dot(gp_Vec(Pv,P));
	239	PP.SetCoord(cPln.X()+scal*Dp.X(),
	240	cPln.Y()+scal*Dp.Y(),
	241	cPln.Z()+scal*Dp.Z());
	242	circAx2.SetLocation(PP);
	243	gp_Circ circCon(circAx2,P.Distance(PP));
	244	Handle(Geom_Circle) GCircCon = new Geom_Circle(circCon);
	245	toreverse = ( norFil.Dot(norCon) <= 0. );
	246	if ((toreverse && plandab) \|\| (!toreverse && !plandab) ){
	247	trans = TopAbs_REVERSED;
	248	}
	249	else {
	250	trans = TopAbs_FORWARD;
	251	}
	252	if(plandab){
	253	Data->ChangeInterferenceOnS2().
	254	SetInterference(ChFiKPart_IndexCurveInDS(GCircCon,DStr),
	255	trans,GLin2dCon,GLin2dFil2);
	256	}
	257	else{
	258	Data->ChangeInterferenceOnS1().
	259	SetInterference(ChFiKPart_IndexCurveInDS(GCircCon,DStr),
	260	trans,GLin2dCon,GLin2dFil2);
	261	}
	262	return Standard_True;
	263	}