[occt.git] / src / StdPrs / StdPrs_ToolTriangulatedShape.cxx

// Created on: 1993-10-27
// Created by: Jean-LOuis FRENKEL
// 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 <StdPrs_ToolTriangulatedShape.hxx>

#include <BRepMesh_DiscretFactory.hxx>
#include <BRepMesh_DiscretRoot.hxx>
#include <BRepTools.hxx>
#include <BRep_Tool.hxx>
#include <GeomAbs_SurfaceType.hxx>
#include <GeomLib.hxx>
#include <gp_XYZ.hxx>
#include <Poly_Connect.hxx>
#include <Poly_Triangulation.hxx>
#include <Precision.hxx>
#include <Prs3d.hxx>
#include <Prs3d_Drawer.hxx>
#include <TColgp_Array1OfPnt.hxx>
#include <TColgp_Array1OfPnt2d.hxx>
#include <TopAbs_Orientation.hxx>
#include <TopLoc_Location.hxx>
#include <TShort_HArray1OfShortReal.hxx>
#include <TShort_Array1OfShortReal.hxx>
#include <TopExp_Explorer.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Face.hxx>

//=======================================================================
//function : IsTriangulated
//purpose  :
//=======================================================================
Standard_Boolean StdPrs_ToolTriangulatedShape::IsTriangulated (const TopoDS_Shape& theShape)
{
  TopLoc_Location aLocDummy;
  for (TopExp_Explorer aFaceIter (theShape, TopAbs_FACE); aFaceIter.More(); aFaceIter.Next())
  {
    const TopoDS_Face&                aFace = TopoDS::Face (aFaceIter.Current());
    const Handle(Poly_Triangulation)& aTri  = BRep_Tool::Triangulation (aFace, aLocDummy);
    if (aTri.IsNull())
    {
      return Standard_False;
    }
  }
  return Standard_True;
}

//=======================================================================
//function : IsClosed
//purpose  :
//=======================================================================
Standard_Boolean StdPrs_ToolTriangulatedShape::IsClosed (const TopoDS_Shape& theShape)
{
  if (theShape.IsNull())
  {
    return Standard_True;
  }

  switch (theShape.ShapeType())
  {
    case TopAbs_COMPOUND:
    case TopAbs_COMPSOLID:
    default:
    {
      // check that compound consists of closed solids
      for (TopoDS_Iterator anIter (theShape); anIter.More(); anIter.Next())
      {
        const TopoDS_Shape& aShape = anIter.Value();
        if (!IsClosed (aShape))
        {
          return Standard_False;
        }
      }
      return Standard_True;
    }
    case TopAbs_SOLID:
    {
      // Check for non-manifold topology first of all:
      // have to use BRep_Tool::IsClosed() because it checks the face connectivity
      // inside the shape
      if (!BRep_Tool::IsClosed (theShape))
        return Standard_False;

      for (TopoDS_Iterator anIter (theShape); anIter.More(); anIter.Next())
      {
        const TopoDS_Shape& aShape = anIter.Value();
        if (aShape.IsNull())
        {
          continue;
        }

        if (aShape.ShapeType() == TopAbs_FACE)
        {
          // invalid solid
          return Standard_False;
        }
        else if (!IsTriangulated (aShape))
        {
          // mesh contains holes
          return Standard_False;
        }
      }
      return Standard_True;
    }
    case TopAbs_SHELL:
    case TopAbs_FACE:
    {
      // free faces / shell are not allowed
      return Standard_False;
    }
    case TopAbs_WIRE:
    case TopAbs_EDGE:
    case TopAbs_VERTEX:
    {
      // ignore
      return Standard_True;
    }
  }
}

//=======================================================================
//function : Normal
//purpose  :
//=======================================================================
void StdPrs_ToolTriangulatedShape::Normal (const TopoDS_Face&  theFace,
                                           Poly_Connect&       thePolyConnect,
                                           TColgp_Array1OfDir& theNormals)
{
  const Handle(Poly_Triangulation)& aPolyTri = thePolyConnect.Triangulation();
  const TColgp_Array1OfPnt&         aNodes   = aPolyTri->Nodes();
  if (aPolyTri->HasNormals())
  {
    // normals pre-computed in triangulation structure
    const TShort_Array1OfShortReal& aNormals = aPolyTri->Normals();
    const Standard_ShortReal*       aNormArr = &(aNormals.Value (aNormals.Lower()));
    for (Standard_Integer aNodeIter = aNodes.Lower(); aNodeIter <= aNodes.Upper(); ++aNodeIter)
    {
      const Standard_Integer anId = 3 * (aNodeIter - aNodes.Lower());
      const gp_Dir aNorm (aNormArr[anId + 0],
                          aNormArr[anId + 1],
                          aNormArr[anId + 2]);
      theNormals (aNodeIter) = aNorm;
    }

    if (theFace.Orientation() == TopAbs_REVERSED)
    {
      for (Standard_Integer aNodeIter = aNodes.Lower(); aNodeIter <= aNodes.Upper(); ++aNodeIter)
      {
        theNormals.ChangeValue (aNodeIter).Reverse();
      }
    }
    return;
  }

  // take in face the surface location
  const TopoDS_Face      aZeroFace = TopoDS::Face (theFace.Located (TopLoc_Location()));
  Handle(Geom_Surface)   aSurf     = BRep_Tool::Surface (aZeroFace);
  const Standard_Real    aTol      = Precision::Confusion();
  Handle(TShort_HArray1OfShortReal) aNormals = new TShort_HArray1OfShortReal (1, aPolyTri->NbNodes() * 3);
  const Poly_Array1OfTriangle& aTriangles = aPolyTri->Triangles();
  const TColgp_Array1OfPnt2d*  aNodesUV   = aPolyTri->HasUVNodes() && !aSurf.IsNull()
                                          ? &aPolyTri->UVNodes()
                                          : NULL;
  Standard_Integer aTri[3];
  for (Standard_Integer aNodeIter = aNodes.Lower(); aNodeIter <= aNodes.Upper(); ++aNodeIter)
  {
    // try to retrieve normal from real surface first, when UV coordinates are available
    if (aNodesUV == NULL
     || GeomLib::NormEstim (aSurf, aNodesUV->Value (aNodeIter), aTol, theNormals (aNodeIter)) > 1)
    {
      // compute flat normals
      gp_XYZ eqPlan (0.0, 0.0, 0.0);
      for (thePolyConnect.Initialize (aNodeIter); thePolyConnect.More(); thePolyConnect.Next())
      {
        aTriangles (thePolyConnect.Value()).Get (aTri[0], aTri[1], aTri[2]);
        const gp_XYZ v1 (aNodes (aTri[1]).Coord() - aNodes (aTri[0]).Coord());
        const gp_XYZ v2 (aNodes (aTri[2]).Coord() - aNodes (aTri[1]).Coord());
        const gp_XYZ vv = v1 ^ v2;
        const Standard_Real aMod = vv.Modulus();
        if (aMod >= aTol)
        {
          eqPlan += vv / aMod;
        }
      }
      const Standard_Real aModMax = eqPlan.Modulus();
      theNormals (aNodeIter) = (aModMax > aTol) ? gp_Dir (eqPlan) : gp::DZ();
    }

    const Standard_Integer anId = (aNodeIter - aNodes.Lower()) * 3;
    aNormals->SetValue (anId + 1, (Standard_ShortReal )theNormals (aNodeIter).X());
    aNormals->SetValue (anId + 2, (Standard_ShortReal )theNormals (aNodeIter).Y());
    aNormals->SetValue (anId + 3, (Standard_ShortReal )theNormals (aNodeIter).Z());
  }
  aPolyTri->SetNormals (aNormals);

  if (theFace.Orientation() == TopAbs_REVERSED)
  {
    for (Standard_Integer aNodeIter = aNodes.Lower(); aNodeIter <= aNodes.Upper(); ++aNodeIter)
    {
      theNormals.ChangeValue (aNodeIter).Reverse();
    }
  }
}

//=======================================================================
//function : IsTessellated
//purpose  :
//=======================================================================
Standard_Boolean StdPrs_ToolTriangulatedShape::IsTessellated (const TopoDS_Shape&         theShape,
                                                              const Handle(Prs3d_Drawer)& theDrawer)
{
  return BRepTools::Triangulation (theShape, Prs3d::GetDeflection (theShape, theDrawer));
}

// =======================================================================
// function : Tessellate
// purpose  :
// =======================================================================
Standard_Boolean StdPrs_ToolTriangulatedShape::Tessellate (const TopoDS_Shape&         theShape,
                                                           const Handle(Prs3d_Drawer)& theDrawer)
{
  Standard_Boolean wasRecomputed = Standard_False;
  // Check if it is possible to avoid unnecessary recomputation of shape triangulation
  if (IsTessellated (theShape, theDrawer))
  {
    return wasRecomputed;
  }

  Standard_Real aDeflection = Prs3d::GetDeflection (theShape, theDrawer);

  // retrieve meshing tool from Factory
  Handle(BRepMesh_DiscretRoot) aMeshAlgo = BRepMesh_DiscretFactory::Get().Discret (theShape,
                                                                                   aDeflection,
                                                                                   theDrawer->HLRAngle());
  if (!aMeshAlgo.IsNull())
  {
    aMeshAlgo->Perform();
    wasRecomputed = Standard_True;
  }

  return wasRecomputed;
}

// =======================================================================
// function : ClearOnOwnDeflectionChange
// purpose  :
// =======================================================================
void StdPrs_ToolTriangulatedShape::ClearOnOwnDeflectionChange (const TopoDS_Shape&         theShape,
                                                               const Handle(Prs3d_Drawer)& theDrawer,
                                                               const Standard_Boolean      theToResetCoeff)
{
  if (!theDrawer->IsAutoTriangulation()
    || theShape.IsNull())
  {
    return;
  }

  const Standard_Boolean isOwnDeviationAngle       = theDrawer->HasOwnDeviationAngle();
  const Standard_Boolean isOwnDeviationCoefficient = theDrawer->HasOwnDeviationCoefficient();
  const Standard_Real anAngleNew  = theDrawer->DeviationAngle();
  const Standard_Real anAnglePrev = theDrawer->PreviousDeviationAngle();
  const Standard_Real aCoeffNew   = theDrawer->DeviationCoefficient();
  const Standard_Real aCoeffPrev  = theDrawer->PreviousDeviationCoefficient();
  if ((!isOwnDeviationAngle       || Abs (anAngleNew - anAnglePrev) <= Precision::Angular())
   && (!isOwnDeviationCoefficient || Abs (aCoeffNew  - aCoeffPrev)  <= Precision::Confusion()))
  {
    return;
  }

  BRepTools::Clean (theShape);
  if (theToResetCoeff)
  {
    theDrawer->UpdatePreviousDeviationAngle();
    theDrawer->UpdatePreviousDeviationCoefficient();
  }
}
Commit	Line	Data
b311480e	1	// Created on: 1993-10-27
	2	// Created by: Jean-LOuis FRENKEL
	3	// Copyright (c) 1993-1999 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.
b311480e	16
5ad8c033	17	#include <StdPrs_ToolTriangulatedShape.hxx>
9447f912	18
5ad8c033	19	#include <BRepMesh_DiscretFactory.hxx>
	20	#include <BRepMesh_DiscretRoot.hxx>
	21	#include <BRepTools.hxx>
9447f912	22	#include <BRep_Tool.hxx>
9447f912	23	#include <GeomAbs_SurfaceType.hxx>
9447f912	24	#include <GeomLib.hxx>
5ad8c033	25	#include <gp_XYZ.hxx>
9447f912	26	#include <Poly_Connect.hxx>
7fd59977	27	#include <Poly_Triangulation.hxx>
9447f912	28	#include <Precision.hxx>
5ad8c033	29	#include <Prs3d.hxx>
5ad8c033	30	#include <Prs3d_Drawer.hxx>
7fd59977	31	#include <TColgp_Array1OfPnt.hxx>
7fd59977	32	#include <TColgp_Array1OfPnt2d.hxx>
7fd59977	33	#include <TopAbs_Orientation.hxx>
7fd59977	34	#include <TopLoc_Location.hxx>
	35	#include <TShort_HArray1OfShortReal.hxx>
	36	#include <TShort_Array1OfShortReal.hxx>
fc9b36d6	37	#include <TopExp_Explorer.hxx>
fc9b36d6	38	#include <TopoDS.hxx>
5ad8c033	39	#include <TopoDS_Face.hxx>
7fd59977	40
4769a395	41	//=======================================================================
5ad8c033	42	//function : IsTriangulated
4769a395	43	//purpose :
4769a395	44	//=======================================================================
5ad8c033	45	Standard_Boolean StdPrs_ToolTriangulatedShape::IsTriangulated (const TopoDS_Shape& theShape)
3b1817a9	46	{
4769a395	47	TopLoc_Location aLocDummy;
4769a395	48	for (TopExp_Explorer aFaceIter (theShape, TopAbs_FACE); aFaceIter.More(); aFaceIter.Next())
3b1817a9	49	{
4769a395	50	const TopoDS_Face& aFace = TopoDS::Face (aFaceIter.Current());
	51	const Handle(Poly_Triangulation)& aTri = BRep_Tool::Triangulation (aFace, aLocDummy);
	52	if (aTri.IsNull())
3b1817a9	53	{
4769a395	54	return Standard_False;
3b1817a9	55	}
3b1817a9	56	}
4769a395	57	return Standard_True;
3b1817a9	58	}
3b1817a9	59
7fd59977	60	//=======================================================================
7fd59977	61	//function : IsClosed
9447f912	62	//purpose :
7fd59977	63	//=======================================================================
5ad8c033	64	Standard_Boolean StdPrs_ToolTriangulatedShape::IsClosed (const TopoDS_Shape& theShape)
7fd59977	65	{
3b1817a9	66	if (theShape.IsNull())
	67	{
	68	return Standard_True;
	69	}
	70
	71	switch (theShape.ShapeType())
	72	{
	73	case TopAbs_COMPOUND:
	74	case TopAbs_COMPSOLID:
	75	default:
	76	{
	77	// check that compound consists of closed solids
	78	for (TopoDS_Iterator anIter (theShape); anIter.More(); anIter.Next())
	79	{
	80	const TopoDS_Shape& aShape = anIter.Value();
	81	if (!IsClosed (aShape))
	82	{
	83	return Standard_False;
	84	}
	85	}
	86	return Standard_True;
	87	}
	88	case TopAbs_SOLID:
	89	{
4769a395	90	// Check for non-manifold topology first of all:
	91	// have to use BRep_Tool::IsClosed() because it checks the face connectivity
	92	// inside the shape
	93	if (!BRep_Tool::IsClosed (theShape))
	94	return Standard_False;
	95
3b1817a9	96	for (TopoDS_Iterator anIter (theShape); anIter.More(); anIter.Next())
	97	{
	98	const TopoDS_Shape& aShape = anIter.Value();
	99	if (aShape.IsNull())
	100	{
	101	continue;
	102	}
	103
4769a395	104	if (aShape.ShapeType() == TopAbs_FACE)
3b1817a9	105	{
	106	// invalid solid
	107	return Standard_False;
	108	}
4769a395	109	else if (!IsTriangulated (aShape))
3b1817a9	110	{
	111	// mesh contains holes
	112	return Standard_False;
	113	}
	114	}
	115	return Standard_True;
	116	}
	117	case TopAbs_SHELL:
	118	case TopAbs_FACE:
	119	{
	120	// free faces / shell are not allowed
	121	return Standard_False;
	122	}
	123	case TopAbs_WIRE:
	124	case TopAbs_EDGE:
	125	case TopAbs_VERTEX:
	126	{
	127	// ignore
	128	return Standard_True;
	129	}
	130	}
7fd59977	131	}
7fd59977	132
7fd59977	133	//=======================================================================
7fd59977	134	//function : Normal
9447f912	135	//purpose :
7fd59977	136	//=======================================================================
5ad8c033	137	void StdPrs_ToolTriangulatedShape::Normal (const TopoDS_Face& theFace,
	138	Poly_Connect& thePolyConnect,
	139	TColgp_Array1OfDir& theNormals)
7fd59977	140	{
9447f912	141	const Handle(Poly_Triangulation)& aPolyTri = thePolyConnect.Triangulation();
	142	const TColgp_Array1OfPnt& aNodes = aPolyTri->Nodes();
	143	if (aPolyTri->HasNormals())
	144	{
	145	// normals pre-computed in triangulation structure
	146	const TShort_Array1OfShortReal& aNormals = aPolyTri->Normals();
	147	const Standard_ShortReal* aNormArr = &(aNormals.Value (aNormals.Lower()));
	148	for (Standard_Integer aNodeIter = aNodes.Lower(); aNodeIter <= aNodes.Upper(); ++aNodeIter)
	149	{
	150	const Standard_Integer anId = 3 * (aNodeIter - aNodes.Lower());
	151	const gp_Dir aNorm (aNormArr[anId + 0],
	152	aNormArr[anId + 1],
	153	aNormArr[anId + 2]);
	154	theNormals (aNodeIter) = aNorm;
7fd59977	155	}
7fd59977	156
9447f912	157	if (theFace.Orientation() == TopAbs_REVERSED)
	158	{
	159	for (Standard_Integer aNodeIter = aNodes.Lower(); aNodeIter <= aNodes.Upper(); ++aNodeIter)
	160	{
	161	theNormals.ChangeValue (aNodeIter).Reverse();
7fd59977	162	}
7fd59977	163	}
9447f912	164	return;
7fd59977	165	}
7fd59977	166
9447f912	167	// take in face the surface location
	168	const TopoDS_Face aZeroFace = TopoDS::Face (theFace.Located (TopLoc_Location()));
	169	Handle(Geom_Surface) aSurf = BRep_Tool::Surface (aZeroFace);
	170	const Standard_Real aTol = Precision::Confusion();
	171	Handle(TShort_HArray1OfShortReal) aNormals = new TShort_HArray1OfShortReal (1, aPolyTri->NbNodes() * 3);
	172	const Poly_Array1OfTriangle& aTriangles = aPolyTri->Triangles();
	173	const TColgp_Array1OfPnt2d* aNodesUV = aPolyTri->HasUVNodes() && !aSurf.IsNull()
	174	? &aPolyTri->UVNodes()
	175	: NULL;
	176	Standard_Integer aTri[3];
	177	for (Standard_Integer aNodeIter = aNodes.Lower(); aNodeIter <= aNodes.Upper(); ++aNodeIter)
	178	{
	179	// try to retrieve normal from real surface first, when UV coordinates are available
	180	if (aNodesUV == NULL
	181	\|\| GeomLib::NormEstim (aSurf, aNodesUV->Value (aNodeIter), aTol, theNormals (aNodeIter)) > 1)
	182	{
	183	// compute flat normals
	184	gp_XYZ eqPlan (0.0, 0.0, 0.0);
	185	for (thePolyConnect.Initialize (aNodeIter); thePolyConnect.More(); thePolyConnect.Next())
	186	{
	187	aTriangles (thePolyConnect.Value()).Get (aTri[0], aTri[1], aTri[2]);
	188	const gp_XYZ v1 (aNodes (aTri[1]).Coord() - aNodes (aTri[0]).Coord());
	189	const gp_XYZ v2 (aNodes (aTri[2]).Coord() - aNodes (aTri[1]).Coord());
	190	const gp_XYZ vv = v1 ^ v2;
	191	const Standard_Real aMod = vv.Modulus();
	192	if (aMod >= aTol)
	193	{
	194	eqPlan += vv / aMod;
	195	}
7fd59977	196	}
9447f912	197	const Standard_Real aModMax = eqPlan.Modulus();
9447f912	198	theNormals (aNodeIter) = (aModMax > aTol) ? gp_Dir (eqPlan) : gp::DZ();
7fd59977	199	}
7fd59977	200
9447f912	201	const Standard_Integer anId = (aNodeIter - aNodes.Lower()) * 3;
	202	aNormals->SetValue (anId + 1, (Standard_ShortReal )theNormals (aNodeIter).X());
	203	aNormals->SetValue (anId + 2, (Standard_ShortReal )theNormals (aNodeIter).Y());
	204	aNormals->SetValue (anId + 3, (Standard_ShortReal )theNormals (aNodeIter).Z());
7fd59977	205	}
9447f912	206	aPolyTri->SetNormals (aNormals);
7fd59977	207
9447f912	208	if (theFace.Orientation() == TopAbs_REVERSED)
	209	{
	210	for (Standard_Integer aNodeIter = aNodes.Lower(); aNodeIter <= aNodes.Upper(); ++aNodeIter)
	211	{
	212	theNormals.ChangeValue (aNodeIter).Reverse();
7fd59977	213	}
7fd59977	214	}
7fd59977	215	}
5ad8c033	216
	217	//=======================================================================
	218	//function : IsTessellated
	219	//purpose :
	220	//=======================================================================
	221	Standard_Boolean StdPrs_ToolTriangulatedShape::IsTessellated (const TopoDS_Shape& theShape,
	222	const Handle(Prs3d_Drawer)& theDrawer)
	223	{
	224	return BRepTools::Triangulation (theShape, Prs3d::GetDeflection (theShape, theDrawer));
	225	}
	226
	227	// =======================================================================
	228	// function : Tessellate
	229	// purpose :
	230	// =======================================================================
	231	Standard_Boolean StdPrs_ToolTriangulatedShape::Tessellate (const TopoDS_Shape& theShape,
	232	const Handle(Prs3d_Drawer)& theDrawer)
	233	{
	234	Standard_Boolean wasRecomputed = Standard_False;
	235	// Check if it is possible to avoid unnecessary recomputation of shape triangulation
	236	if (IsTessellated (theShape, theDrawer))
	237	{
	238	return wasRecomputed;
	239	}
	240
	241	Standard_Real aDeflection = Prs3d::GetDeflection (theShape, theDrawer);
	242
	243	// retrieve meshing tool from Factory
	244	Handle(BRepMesh_DiscretRoot) aMeshAlgo = BRepMesh_DiscretFactory::Get().Discret (theShape,
	245	aDeflection,
	246	theDrawer->HLRAngle());
	247	if (!aMeshAlgo.IsNull())
	248	{
	249	aMeshAlgo->Perform();
	250	wasRecomputed = Standard_True;
	251	}
	252
	253	return wasRecomputed;
	254	}
83b0f13a	255
	256	// =======================================================================
	257	// function : ClearOnOwnDeflectionChange
	258	// purpose :
	259	// =======================================================================
	260	void StdPrs_ToolTriangulatedShape::ClearOnOwnDeflectionChange (const TopoDS_Shape& theShape,
	261	const Handle(Prs3d_Drawer)& theDrawer,
	262	const Standard_Boolean theToResetCoeff)
	263	{
	264	if (!theDrawer->IsAutoTriangulation()
	265	\|\| theShape.IsNull())
	266	{
	267	return;
	268	}
	269
	270	const Standard_Boolean isOwnDeviationAngle = theDrawer->HasOwnDeviationAngle();
	271	const Standard_Boolean isOwnDeviationCoefficient = theDrawer->HasOwnDeviationCoefficient();
	272	const Standard_Real anAngleNew = theDrawer->DeviationAngle();
	273	const Standard_Real anAnglePrev = theDrawer->PreviousDeviationAngle();
	274	const Standard_Real aCoeffNew = theDrawer->DeviationCoefficient();
	275	const Standard_Real aCoeffPrev = theDrawer->PreviousDeviationCoefficient();
	276	if ((!isOwnDeviationAngle \|\| Abs (anAngleNew - anAnglePrev) <= Precision::Angular())
	277	&& (!isOwnDeviationCoefficient \|\| Abs (aCoeffNew - aCoeffPrev) <= Precision::Confusion()))
	278	{
	279	return;
	280	}
	281
	282	BRepTools::Clean (theShape);
	283	if (theToResetCoeff)
	284	{
	285	theDrawer->UpdatePreviousDeviationAngle();
	286	theDrawer->UpdatePreviousDeviationCoefficient();
	287	}
	288	}