// Created on: 1993-07-07
// 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 <BRep_Tool.ixx>
#include <BRep_TFace.hxx>
#include <BRep_TEdge.hxx>
#include <BRep_TVertex.hxx>
#include <BRep_CurveRepresentation.hxx>
#include <BRep_CurveOnSurface.hxx>
#include <BRep_CurveOnClosedSurface.hxx>
#include <BRep_ListIteratorOfListOfCurveRepresentation.hxx>
#include <BRep_PointRepresentation.hxx>
#include <BRep_ListIteratorOfListOfPointRepresentation.hxx>
#include <BRep_Curve3D.hxx>
#include <BRep_Polygon3D.hxx>
#include <BRep_PolygonOnSurface.hxx>
#include <BRep_PolygonOnClosedSurface.hxx>
#include <BRep_PolygonOnTriangulation.hxx>
#include <BRep_PolygonOnClosedTriangulation.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Iterator.hxx>
#include <TopoDS_Wire.hxx>
#include <TopExp_Explorer.hxx>
#include <TopExp.hxx>
#include <TopTools_MapOfShape.hxx>
#include <ElSLib.hxx>
#include <Geom_Plane.hxx>
#include <Geom_RectangularTrimmedSurface.hxx>
#include <Geom_OffsetSurface.hxx>
#include <Geom_TrimmedCurve.hxx>
#include <Geom2d_TrimmedCurve.hxx>
#include <ProjLib_ProjectedCurve.hxx>
#include <GeomProjLib.hxx>
#include <Geom2dAdaptor.hxx>
#include <GeomAdaptor_HCurve.hxx>
#include <GeomAdaptor_HSurface.hxx>
#include <Precision.hxx>
#include <Poly_Triangulation.hxx>
#include <Poly_Polygon3D.hxx>
#include <Poly_Polygon2D.hxx>
#include <Poly_PolygonOnTriangulation.hxx>
#include <NCollection_Map.hxx>
#include <NCollection_IncAllocator.hxx>
#include <TopTools_ShapeMapHasher.hxx>
//modified by NIZNHY-PKV Fri Oct 17 14:13:29 2008f
static
Standard_Boolean IsPlane(const Handle(Geom_Surface)& aS);
//modified by NIZNHY-PKV Fri Oct 17 14:13:33 2008t
//
//=======================================================================
//function : Surface
//purpose : Returns the geometric surface of the face. Returns
// in <L> the location for the surface.
//=======================================================================
const Handle(Geom_Surface)& BRep_Tool::Surface(const TopoDS_Face& F,
TopLoc_Location& L)
{
Handle(BRep_TFace)& TF = *((Handle(BRep_TFace)*) &F.TShape());
L = F.Location() * TF->Location();
return TF->Surface();
}
//=======================================================================
//function : Surface
//purpose : Returns the geometric surface of the face. It can
// be a copy if there is a Location.
//=======================================================================
Handle(Geom_Surface) BRep_Tool::Surface(const TopoDS_Face& F)
{
Handle(BRep_TFace)& TF = *((Handle(BRep_TFace)*) &F.TShape());
TopLoc_Location L = F.Location() * TF->Location();
Handle(Geom_Surface) S = TF->Surface();
if(S.IsNull()) return S;
Handle(Geom_Geometry) S1;
if (!L.IsIdentity()) {
S1 = S->Copy();
S = *((Handle(Geom_Surface)*)&S1);
S->Transform(L.Transformation());
}
return S;
}
//=======================================================================
//function : Triangulation
//purpose : Returns the Triangulation of the face. It is a
// null handle if there is no triangulation.
//=======================================================================
const Handle(Poly_Triangulation)&
BRep_Tool::Triangulation(const TopoDS_Face& F,
TopLoc_Location& L)
{
L = F.Location();
return (*((Handle(BRep_TFace)*)&F.TShape()))->Triangulation();
}
//=======================================================================
//function : Tolerance
//purpose : Returns the tolerance of the face.
//=======================================================================
Standard_Real BRep_Tool::Tolerance(const TopoDS_Face& F)
{
Standard_Real p = (*((Handle(BRep_TFace)*)&F.TShape()))->Tolerance();
Standard_Real pMin = Precision::Confusion();
if (p > pMin) return p;
else return pMin;
}
//=======================================================================
//function : NaturalRestriction
//purpose : Returns the NaturalRestriction flag of the face.
//=======================================================================
Standard_Boolean BRep_Tool::NaturalRestriction(const TopoDS_Face& F)
{
return (*((Handle(BRep_TFace)*) &F.TShape()))->NaturalRestriction();
}
//=======================================================================
//function : Curve
//purpose : Returns the 3D curve of the edge. May be a Null
// handle. Returns in <L> the location for the curve.
// In <First> and <Last> the parameter range.
//=======================================================================
static const Handle(Geom_Curve) nullCurve;
const Handle(Geom_Curve)& BRep_Tool::Curve(const TopoDS_Edge& E,
TopLoc_Location& L,
Standard_Real& First,
Standard_Real& Last)
{
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsCurve3D()) {
const Handle(BRep_Curve3D)& GC = *((Handle(BRep_Curve3D)*)&cr);
L = E.Location() * GC->Location();
GC->Range(First,Last);
return GC->Curve3D();
}
itcr.Next();
}
L.Identity();
return nullCurve;
}
//=======================================================================
//function : Curve
//purpose : Returns the 3D curve of the edge. May be a Null handle.
// In <First> and <Last> the parameter range.
// It can be a copy if there is a Location.
//=======================================================================
Handle(Geom_Curve) BRep_Tool::Curve(const TopoDS_Edge& E,
Standard_Real& First,
Standard_Real& Last)
{
TopLoc_Location L;
Handle(Geom_Curve) C = Curve(E,L,First,Last);
if ( !C.IsNull() ) {
Handle(Geom_Geometry) C1;
if ( !L.IsIdentity() ) {
C1 = C->Copy();
C = *((Handle(Geom_Curve)*)&C1);
C->Transform(L.Transformation());
}
}
return C;
}
//=======================================================================
//function : IsGeometric
//purpose : Returns True if <E> is a 3d curve or a curve on
// surface.
//=======================================================================
Standard_Boolean BRep_Tool::IsGeometric(const TopoDS_Edge& E)
{
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsCurve3D()) {
Standard_Real first, last;
TopLoc_Location L;
const Handle(Geom_Curve)& C = BRep_Tool::Curve(E, L, first, last);
if (!C.IsNull()) return Standard_True;
}
else if (cr->IsCurveOnSurface()) return Standard_True;
itcr.Next();
}
return Standard_False;
}
//=======================================================================
//function : Polygon3D
//purpose : Returns the 3D polygon of the edge. May be a Null
// handle. Returns in <L> the location for the polygon.
//=======================================================================
static const Handle(Poly_Polygon3D) nullPolygon3D;
const Handle(Poly_Polygon3D)& BRep_Tool::Polygon3D(const TopoDS_Edge& E,
TopLoc_Location& L)
{
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsPolygon3D()) {
const Handle(BRep_Polygon3D)& GC = *((Handle(BRep_Polygon3D)*)&cr);
L = E.Location() * GC->Location();
return GC->Polygon3D();
}
itcr.Next();
}
L.Identity();
return nullPolygon3D;
}
//=======================================================================
//function : CurveOnSurface
//purpose : Returns the curve associated to the edge in the
// parametric space of the face. Returns a NULL
// handle if this curve does not exist. Returns in
// <First> and <Last> the parameter range.
//=======================================================================
Handle(Geom2d_Curve) BRep_Tool::CurveOnSurface(const TopoDS_Edge& E,
const TopoDS_Face& F,
Standard_Real& First,
Standard_Real& Last)
{
TopLoc_Location l;
const Handle(Geom_Surface)& S = BRep_Tool::Surface(F,l);
TopoDS_Edge aLocalEdge = E;
if (F.Orientation() == TopAbs_REVERSED) {
aLocalEdge.Reverse();
// return CurveOnSurface(E,S,l,First,Last);
}
// return CurveOnSurface(TopoDS::Edge(E.Reversed()),S,l,First,Last);
// else
// return CurveOnSurface(E,S,l,First,Last);
return CurveOnSurface(aLocalEdge,S,l,First,Last);
}
//=======================================================================
//function : CurveOnSurface
//purpose : Returns the curve associated to the edge in the
// parametric space of the surface. Returns a NULL
// handle if this curve does not exist. Returns in
// <First> and <Last> the parameter range.
//=======================================================================
static const Handle(Geom2d_Curve) nullPCurve;
Handle(Geom2d_Curve) BRep_Tool::CurveOnSurface(const TopoDS_Edge& E,
const Handle(Geom_Surface)& S,
const TopLoc_Location& L,
Standard_Real& First,
Standard_Real& Last)
{
TopLoc_Location loc = L.Predivided(E.Location());
Standard_Boolean Eisreversed = (E.Orientation() == TopAbs_REVERSED);
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsCurveOnSurface(S,loc)) {
const Handle(BRep_GCurve)& GC = *((Handle(BRep_GCurve)*)&cr);
GC->Range(First,Last);
if (GC->IsCurveOnClosedSurface() && Eisreversed)
return GC->PCurve2();
else
return GC->PCurve();
}
itcr.Next();
}
// for planar surface and 3d curve try a projection
// modif 21-05-97 : for RectangularTrimmedSurface, try a projection
Handle(Geom_Plane) GP;
Handle(Geom_RectangularTrimmedSurface) GRTS;
GRTS = Handle(Geom_RectangularTrimmedSurface)::DownCast(S);
if(!GRTS.IsNull())
GP = Handle(Geom_Plane)::DownCast(GRTS->BasisSurface());
else
GP = Handle(Geom_Plane)::DownCast(S);
//fin modif du 21-05-97
if (!GP.IsNull())
{
Handle(GeomAdaptor_HCurve) HC;
Handle(GeomAdaptor_HSurface) HS;
HC = new GeomAdaptor_HCurve();
HS = new GeomAdaptor_HSurface();
TopLoc_Location aCurveLocation;
Standard_Real f, l;// for those who call with (u,u).
Handle(Geom_Curve) C3d = BRep_Tool::Curve(E, aCurveLocation, f, l);
if (C3d.IsNull())
{
return nullPCurve;
}
aCurveLocation = L.Predivided(aCurveLocation);
Handle(Geom_Plane) Plane = GP;
if (!aCurveLocation.IsIdentity())
{
const gp_Trsf& T = aCurveLocation.Transformation();
Handle(Geom_Geometry) GPT = GP->Transformed(T);
Plane = *((Handle(Geom_Plane)*)&GPT);
}
GeomAdaptor_Surface& GAS = HS->ChangeSurface();
GAS.Load(Plane);
Handle(Geom_Curve) ProjOnPlane =
GeomProjLib::ProjectOnPlane(new Geom_TrimmedCurve(C3d,f,l),
Plane,
Plane->Position().Direction(),
Standard_True);
GeomAdaptor_Curve& GAC = HC->ChangeCurve();
GAC.Load(ProjOnPlane);
ProjLib_ProjectedCurve Proj(HS,HC);
Handle(Geom2d_Curve) pc = Geom2dAdaptor::MakeCurve(Proj);
if (pc->DynamicType() == STANDARD_TYPE(Geom2d_TrimmedCurve)) {
Handle(Geom2d_TrimmedCurve) TC =
(*((Handle(Geom2d_TrimmedCurve)*)&pc));
pc = TC->BasisCurve();
}
First = f; Last = l;
return pc;
}
return nullPCurve;
}
//=======================================================================
//function : CurveOnSurface
//purpose :
//=======================================================================
void BRep_Tool::CurveOnSurface(const TopoDS_Edge& E,
Handle(Geom2d_Curve)& C,
Handle(Geom_Surface)& S,
TopLoc_Location& L,
Standard_Real& First,
Standard_Real& Last)
{
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsCurveOnSurface()) {
const Handle(BRep_GCurve)& GC = *((Handle(BRep_GCurve)*)&cr);
C = GC->PCurve();
S = GC->Surface();
L = E.Location() * GC->Location();
GC->Range(First,Last);
return;
}
itcr.Next();
}
C = Handle(Geom2d_Curve)();
S = Handle(Geom_Surface)();
L = TopLoc_Location();
}
//=======================================================================
//function : CurveOnSurface
//purpose :
//=======================================================================
void BRep_Tool::CurveOnSurface(const TopoDS_Edge& E,
Handle(Geom2d_Curve)& C,
Handle(Geom_Surface)& S,
TopLoc_Location& L,
Standard_Real& First,
Standard_Real& Last,
const Standard_Integer Index)
{
Standard_Integer i = 0;
Standard_Boolean Eisreversed = (E.Orientation() == TopAbs_REVERSED);
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsCurveOnSurface()) {
const Handle(BRep_GCurve)& GC = *((Handle(BRep_GCurve)*)&cr);
i++;
if (i > Index) break;
if (i == Index) {
// JMB le 21 Mai 1999
// it is done as in the other CurveOnSurface methods, ie. take into account
// the orientation in case of cut edges (return PCurve2)
// otherwise there is a risk to loop curves or to not get the prover one.
if (GC->IsCurveOnClosedSurface() && Eisreversed)
C = GC->PCurve2();
else
C = GC->PCurve();
S = GC->Surface();
L = E.Location() * GC->Location();
GC->Range(First,Last);
return;
}
}
itcr.Next();
}
C = Handle(Geom2d_Curve)();
S = Handle(Geom_Surface)();
L = TopLoc_Location();
}
//=======================================================================
//function : PolygonOnSurface
//purpose : Returns the polygon associated to the edge in the
// parametric space of the face. Returns a NULL
// handle if this polygon does not exist.
//=======================================================================
Handle(Poly_Polygon2D) BRep_Tool::PolygonOnSurface(const TopoDS_Edge& E,
const TopoDS_Face& F)
{
TopLoc_Location l;
const Handle(Geom_Surface)& S = BRep_Tool::Surface(F,l);
TopoDS_Edge aLocalEdge = E;
if (F.Orientation() == TopAbs_REVERSED) {
aLocalEdge.Reverse();
// return PolygonOnSurface(E,S,l);
}
// return PolygonOnSurface(TopoDS::Edge(E.Reversed()),S,l);
// else
// return PolygonOnSurface(E,S,l);
return PolygonOnSurface(aLocalEdge,S,l);
}
//=======================================================================
//function : PolygonOnSurface
//purpose : Returns the polygon associated to the edge in the
// parametric space of the surface. Returns a NULL
// handle if this polygon does not exist.
//=======================================================================
static const Handle(Poly_Polygon2D) nullPolygon2D;
Handle(Poly_Polygon2D)
BRep_Tool::PolygonOnSurface(const TopoDS_Edge& E,
const Handle(Geom_Surface)& S,
const TopLoc_Location& L)
{
TopLoc_Location l = L.Predivided(E.Location());
Standard_Boolean Eisreversed = (E.Orientation() == TopAbs_REVERSED);
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsPolygonOnSurface(S,l)) {
if (cr->IsPolygonOnClosedSurface() && Eisreversed )
return cr->Polygon2();
else
return cr->Polygon();
}
itcr.Next();
}
return nullPolygon2D;
}
//=======================================================================
//function : PolygonOnSurface
//purpose :
//=======================================================================
void BRep_Tool::PolygonOnSurface(const TopoDS_Edge& E,
Handle(Poly_Polygon2D)& P,
Handle(Geom_Surface)& S,
TopLoc_Location& L)
{
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsPolygonOnSurface()) {
const Handle(BRep_PolygonOnSurface)& PS =
*((Handle(BRep_PolygonOnSurface)*)&cr);
P = PS->Polygon();
S = PS->Surface();
L = E.Location() * PS->Location();
return;
}
itcr.Next();
}
L = TopLoc_Location();
P = Handle(Poly_Polygon2D)();
S = Handle(Geom_Surface)();
}
//=======================================================================
//function : PolygonOnSurface
//purpose :
//=======================================================================
void BRep_Tool::PolygonOnSurface(const TopoDS_Edge& E,
Handle(Poly_Polygon2D)& P,
Handle(Geom_Surface)& S,
TopLoc_Location& L,
const Standard_Integer Index)
{
Standard_Integer i = 0;
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsPolygonOnSurface()) {
const Handle(BRep_PolygonOnSurface)& PS =
*((Handle(BRep_PolygonOnSurface)*)&cr);
i++;
if (i > Index) break;
if (i == Index) {
P = PS->Polygon();
S = PS->Surface();
L = E.Location() * PS->Location();
return;
}
}
itcr.Next();
}
L = TopLoc_Location();
P = Handle(Poly_Polygon2D)();
S = Handle(Geom_Surface)();
}
//=======================================================================
//function : PolygonOnTriangulation
//purpose : Returns the polygon associated to the edge in the
// parametric space of the face. Returns a NULL
// handle if this polygon does not exist.
//=======================================================================
static const Handle(Poly_PolygonOnTriangulation) nullArray;
const Handle(Poly_PolygonOnTriangulation)&
BRep_Tool::PolygonOnTriangulation(const TopoDS_Edge& E,
const Handle(Poly_Triangulation)& T,
const TopLoc_Location& L)
{
TopLoc_Location l = L.Predivided(E.Location());
Standard_Boolean Eisreversed = (E.Orientation() == TopAbs_REVERSED);
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if ( cr->IsPolygonOnTriangulation(T,l)) {
if ( cr->IsPolygonOnClosedTriangulation() && Eisreversed )
return cr->PolygonOnTriangulation2();
else
return cr->PolygonOnTriangulation();
}
itcr.Next();
}
return nullArray;
}
//=======================================================================
//function : PolygonOnTriangulation
//purpose :
//=======================================================================
void
BRep_Tool::PolygonOnTriangulation(const TopoDS_Edge& E,
Handle(Poly_PolygonOnTriangulation)& P,
Handle(Poly_Triangulation)& T,
TopLoc_Location& L)
{
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsPolygonOnTriangulation()) {
const Handle(BRep_PolygonOnTriangulation)& PT =
*((Handle(BRep_PolygonOnTriangulation)*)&cr);
P = PT->PolygonOnTriangulation();
T = PT->Triangulation();
L = E.Location() * PT->Location();
return;
}
itcr.Next();
}
L = TopLoc_Location();
P = Handle(Poly_PolygonOnTriangulation)();
T = Handle(Poly_Triangulation)();
}
//=======================================================================
//function : PolygonOnTriangulation
//purpose :
//=======================================================================
void
BRep_Tool::PolygonOnTriangulation(const TopoDS_Edge& E,
Handle(Poly_PolygonOnTriangulation)& P,
Handle(Poly_Triangulation)& T,
TopLoc_Location& L,
const Standard_Integer Index)
{
Standard_Integer i = 0;
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsPolygonOnTriangulation()) {
const Handle(BRep_PolygonOnTriangulation)& PT =
*((Handle(BRep_PolygonOnTriangulation)*)&cr);
i++;
if (i > Index) break;
if (i == Index) {
T = PT->Triangulation();
P = PT->PolygonOnTriangulation();
L = E.Location() * PT->Location();
return;
}
}
itcr.Next();
}
L = TopLoc_Location();
P = Handle(Poly_PolygonOnTriangulation)();
T = Handle(Poly_Triangulation)();
}
//=======================================================================
//function : IsClosed
//purpose : Returns True if <E> has two PCurves in the
// parametric space of <F>. i.e. <F> is on a closed
// surface and <E> is on the closing curve.
//=======================================================================
Standard_Boolean BRep_Tool::IsClosed(const TopoDS_Edge& E,
const TopoDS_Face& F)
{
TopLoc_Location l;
const Handle(Geom_Surface)& S = BRep_Tool::Surface(F,l);
if (IsClosed(E,S,l)) return Standard_True;
return IsClosed(E, BRep_Tool::Triangulation(F,l));
}
//=======================================================================
//function : IsClosed
//purpose : Returns True if <E> has two PCurves in the
// parametric space of <S>. i.e. <S> is a closed
// surface and <E> is on the closing curve.
//=======================================================================
Standard_Boolean BRep_Tool::IsClosed(const TopoDS_Edge& E,
const Handle(Geom_Surface)& S,
const TopLoc_Location& L)
{
//modified by NIZNHY-PKV Fri Oct 17 12:16:58 2008f
if (IsPlane(S)) {
return Standard_False;
}
//modified by NIZNHY-PKV Fri Oct 17 12:16:54 2008t
//
TopLoc_Location l = L.Predivided(E.Location());
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsCurveOnSurface(S,l) &&
cr->IsCurveOnClosedSurface())
return Standard_True;
itcr.Next();
}
return Standard_False;
}
//=======================================================================
//function : IsClosed
//purpose : Returns True if <E> has two arrays of indices in
// the triangulation <T>.
//=======================================================================
Standard_Boolean BRep_Tool::IsClosed(const TopoDS_Edge& E,
const Handle(Poly_Triangulation)& T)
{
TopLoc_Location l = E.Location();
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsPolygonOnTriangulation(T,l) &&
cr->IsPolygonOnClosedTriangulation())
return Standard_True;
itcr.Next();
}
return Standard_False;
}
//=======================================================================
//function : Tolerance
//purpose : Returns the tolerance for <E>.
//=======================================================================
Standard_Real BRep_Tool::Tolerance(const TopoDS_Edge& E)
{
Standard_Real p = (*((Handle(BRep_TEdge)*)&E.TShape()))->Tolerance();
Standard_Real pMin = Precision::Confusion();
if (p > pMin) return p;
else return pMin;
}
//=======================================================================
//function : SameParameter
//purpose : Returns the SameParameter flag for the edge.
//=======================================================================
Standard_Boolean BRep_Tool::SameParameter(const TopoDS_Edge& E)
{
return (*((Handle(BRep_TEdge)*)&E.TShape()))->SameParameter();
}
//=======================================================================
//function : SameRange
//purpose : Returns the SameRange flag for the edge.
//=======================================================================
Standard_Boolean BRep_Tool::SameRange(const TopoDS_Edge& E)
{
return (*((Handle(BRep_TEdge)*)&E.TShape()))->SameRange();
}
//=======================================================================
//function : Degenerated
//purpose : Returns True if the edge is degenerated.
//=======================================================================
Standard_Boolean BRep_Tool::Degenerated(const TopoDS_Edge& E)
{
return (*((Handle(BRep_TEdge)*)&E.TShape()))->Degenerated();
}
//=======================================================================
//function : Range
//purpose :
//=======================================================================
void BRep_Tool::Range(const TopoDS_Edge& E,
Standard_Real& First,
Standard_Real& Last)
{
// set the range to all the representations
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsCurve3D()) {
const Handle(BRep_Curve3D)& CR = *((Handle(BRep_Curve3D)*)&cr);
if (!CR->Curve3D().IsNull()) {
First = CR->First();
Last = CR->Last();
break;
}
}
else if (cr->IsCurveOnSurface()) {
const Handle(BRep_GCurve)& CR = *((Handle(BRep_GCurve)*)&cr);
First = CR->First();
Last = CR->Last();
break;
}
itcr.Next();
}
}
//=======================================================================
//function : Range
//purpose :
//=======================================================================
void BRep_Tool::Range(const TopoDS_Edge& E,
const Handle(Geom_Surface)& S,
const TopLoc_Location& L,
Standard_Real& First,
Standard_Real& Last)
{
TopLoc_Location l = L.Predivided(E.Location());
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsCurveOnSurface(S,l)) {
(*((Handle(BRep_GCurve)*)&cr))->Range(First,Last);
break;
}
itcr.Next();
}
if (!itcr.More()) {
Range(E,First,Last);
}
(*((Handle(BRep_TEdge)*)&E.TShape()))->Modified(Standard_True);
}
//=======================================================================
//function : Range
//purpose :
//=======================================================================
void BRep_Tool::Range(const TopoDS_Edge& E,
const TopoDS_Face& F,
Standard_Real& First,
Standard_Real& Last)
{
TopLoc_Location L;
const Handle(Geom_Surface)& S = BRep_Tool::Surface(F,L);
Range(E,S,L,First,Last);
}
//=======================================================================
//function : UVPoints
//purpose :
//=======================================================================
void BRep_Tool::UVPoints(const TopoDS_Edge& E,
const Handle(Geom_Surface)& S,
const TopLoc_Location& L,
gp_Pnt2d& PFirst,
gp_Pnt2d& PLast)
{
TopLoc_Location l = L.Predivided(E.Location());
Standard_Boolean Eisreversed = (E.Orientation() == TopAbs_REVERSED);
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsCurveOnSurface(S,l)) {
if (cr->IsCurveOnClosedSurface() && Eisreversed)
(*((Handle(BRep_CurveOnClosedSurface)*)&cr))->UVPoints2(PFirst,PLast);
else
(*((Handle(BRep_CurveOnSurface)*)&cr))->UVPoints(PFirst,PLast);
return;
}
itcr.Next();
}
// for planar surface project the vertices
// modif 21-05-97 : for RectangularTrimmedSurface, project the vertices
Handle(Geom_Plane) GP;
Handle(Geom_RectangularTrimmedSurface) GRTS;
GRTS = Handle(Geom_RectangularTrimmedSurface)::DownCast(S);
if(!GRTS.IsNull())
GP = Handle(Geom_Plane)::DownCast(GRTS->BasisSurface());
else
GP = Handle(Geom_Plane)::DownCast(S);
//fin modif du 21-05-97
if (!GP.IsNull()) {
// get the two vertices
TopoDS_Vertex Vf,Vl;
TopExp::Vertices(E,Vf,Vl);
TopLoc_Location Linverted = L.Inverted();
Vf.Move(Linverted);
Vl.Move(Linverted);
Standard_Real u,v;
gp_Pln pln = GP->Pln();
u=v=0.;
if (!Vf.IsNull()) {
gp_Pnt PF = BRep_Tool::Pnt(Vf);
ElSLib::Parameters(pln,PF,u,v);
}
PFirst.SetCoord(u,v);
u=v=0.;
if (!Vl.IsNull()) {
gp_Pnt PL = BRep_Tool::Pnt(Vl);
ElSLib::Parameters(pln,PL,u,v);
}
PLast.SetCoord(u,v);
}
}
//=======================================================================
//function : UVPoints
//purpose :
//=======================================================================
void BRep_Tool::UVPoints(const TopoDS_Edge& E,
const TopoDS_Face& F,
gp_Pnt2d& PFirst,
gp_Pnt2d& PLast)
{
TopLoc_Location L;
const Handle(Geom_Surface)& S = BRep_Tool::Surface(F,L);
TopoDS_Edge aLocalEdge = E;
if (F.Orientation() == TopAbs_REVERSED) {
aLocalEdge.Reverse();
// UVPoints(E,S,L,PFirst,PLast);
}
// UVPoints(TopoDS::Edge(E.Reversed()),S,L,PFirst,PLast);
// else
// UVPoints(E,S,L,PFirst,PLast);
UVPoints(aLocalEdge,S,L,PFirst,PLast);
}
//=======================================================================
//function : SetUVPoints
//purpose :
//=======================================================================
void BRep_Tool::SetUVPoints(const TopoDS_Edge& E,
const Handle(Geom_Surface)& S,
const TopLoc_Location& L,
const gp_Pnt2d& PFirst,
const gp_Pnt2d& PLast)
{
TopLoc_Location l = L.Predivided(E.Location());
Standard_Boolean Eisreversed = (E.Orientation() == TopAbs_REVERSED);
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsCurveOnSurface(S,l)) {
if (cr->IsCurveOnClosedSurface() && Eisreversed)
(*((Handle(BRep_CurveOnClosedSurface)*) &cr))->
SetUVPoints2(PFirst,PLast);
else
(*((Handle(BRep_CurveOnSurface)*) &cr))->
SetUVPoints(PFirst,PLast);
}
itcr.Next();
}
}
//=======================================================================
//function : SetUVPoints
//purpose :
//=======================================================================
void BRep_Tool::SetUVPoints(const TopoDS_Edge& E,
const TopoDS_Face& F,
const gp_Pnt2d& PFirst,
const gp_Pnt2d& PLast)
{
TopLoc_Location L;
const Handle(Geom_Surface)& S = BRep_Tool::Surface(F,L);
TopoDS_Edge aLocalEdge = E;
if (F.Orientation() == TopAbs_REVERSED) {
aLocalEdge.Reverse();
// SetUVPoints(TopoDS::Edge(E.Reversed()),S,L,PFirst,PLast);
}
// else
// SetUVPoints(E,S,L,PFirst,PLast);
SetUVPoints(aLocalEdge,S,L,PFirst,PLast);
}
//=======================================================================
//function : HasContinuity
//purpose : Returns True if the edge is on the surfaces of the
// two faces.
//=======================================================================
Standard_Boolean BRep_Tool::HasContinuity(const TopoDS_Edge& E,
const TopoDS_Face& F1,
const TopoDS_Face& F2)
{
TopLoc_Location l1,l2;
const Handle(Geom_Surface)& S1 = BRep_Tool::Surface(F1,l1);
const Handle(Geom_Surface)& S2 = BRep_Tool::Surface(F2,l2);
return HasContinuity(E,S1,S2,l1,l2);
}
//=======================================================================
//function : Continuity
//purpose : Returns the continuity.
//=======================================================================
GeomAbs_Shape BRep_Tool::Continuity(const TopoDS_Edge& E,
const TopoDS_Face& F1,
const TopoDS_Face& F2)
{
TopLoc_Location l1,l2;
const Handle(Geom_Surface)& S1 = BRep_Tool::Surface(F1,l1);
const Handle(Geom_Surface)& S2 = BRep_Tool::Surface(F2,l2);
return Continuity(E,S1,S2,l1,l2);
}
//=======================================================================
//function : HasContinuity
//purpose : Returns True if the edge is on the surfaces.
//=======================================================================
Standard_Boolean BRep_Tool::HasContinuity(const TopoDS_Edge& E,
const Handle(Geom_Surface)& S1,
const Handle(Geom_Surface)& S2,
const TopLoc_Location& L1,
const TopLoc_Location& L2)
{
const TopLoc_Location& Eloc = E.Location();
TopLoc_Location l1 = L1.Predivided(Eloc);
TopLoc_Location l2 = L2.Predivided(Eloc);
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsRegularity(S1,S2,l1,l2))
return Standard_True;
itcr.Next();
}
return Standard_False;
}
//=======================================================================
//function : Continuity
//purpose : Returns the continuity.
//=======================================================================
GeomAbs_Shape BRep_Tool::Continuity(const TopoDS_Edge& E,
const Handle(Geom_Surface)& S1,
const Handle(Geom_Surface)& S2,
const TopLoc_Location& L1,
const TopLoc_Location& L2)
{
TopLoc_Location l1 = L1.Predivided(E.Location());
TopLoc_Location l2 = L2.Predivided(E.Location());
// find the representation
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->ChangeCurves());
while (itcr.More()) {
const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
if (cr->IsRegularity(S1,S2,l1,l2))
return cr->Continuity();
itcr.Next();
}
return GeomAbs_C0;
}
//=======================================================================
//function : HasContinuity
//purpose : Returns True if the edge is on some two surfaces.
//=======================================================================
Standard_Boolean BRep_Tool::HasContinuity(const TopoDS_Edge& E)
{
BRep_ListIteratorOfListOfCurveRepresentation itcr
((*((Handle(BRep_TEdge)*)&E.TShape()))->Curves());
for (; itcr.More(); itcr.Next())
{
const Handle(BRep_CurveRepresentation)& CR = itcr.Value();
if (CR->IsRegularity())
return Standard_True;
}
return Standard_False;
}
//=======================================================================
//function : Pnt
//purpose : Returns the 3d point.
//=======================================================================
gp_Pnt BRep_Tool::Pnt(const TopoDS_Vertex& V)
{
Handle(BRep_TVertex)& TV = *((Handle(BRep_TVertex)*) &V.TShape());
if (TV.IsNull())
{
Standard_NullObject::Raise("BRep_Tool:: TopoDS_Vertex hasn't gp_Pnt");
}
gp_Pnt P = TV->Pnt();
P.Transform(V.Location().Transformation());
return P;
}
//=======================================================================
//function : Tolerance
//purpose : Returns the tolerance.
//=======================================================================
Standard_Real BRep_Tool::Tolerance(const TopoDS_Vertex& V)
{
Handle(BRep_TVertex)& aTVert = *((Handle(BRep_TVertex)*)&V.TShape());
if (aTVert.IsNull())
{
Standard_NullObject::Raise("BRep_Tool:: TopoDS_Vertex hasn't gp_Pnt");
}
Standard_Real p = aTVert->Tolerance();
Standard_Real pMin = Precision::Confusion();
if (p > pMin) return p;
else return pMin;
}
//=======================================================================
//function : Parameter
//purpose : Returns the parameter of <V> on <E>.
//=======================================================================
Standard_Real BRep_Tool::Parameter(const TopoDS_Vertex& V,
const TopoDS_Edge& E)
{
// Search the vertex in the edge
Standard_Boolean rev = Standard_False;
TopoDS_Shape VF;
TopAbs_Orientation orient = TopAbs_INTERNAL;
TopoDS_Iterator itv(E.Oriented(TopAbs_FORWARD));
// if the edge has no vertices
// and is degenerated use the vertex orientation
// RLE, june 94
if (!itv.More() && Degenerated(E)) {
orient = V.Orientation();
}
while (itv.More()) {
const TopoDS_Shape& Vcur = itv.Value();
if (V.IsSame(Vcur)) {
if (VF.IsNull()) {
VF = Vcur;
}
else {
rev = E.Orientation() == TopAbs_REVERSED;
if (Vcur.Orientation() == V.Orientation()) {
VF = Vcur;
}
}
}
itv.Next();
}
if (!VF.IsNull()) orient = VF.Orientation();
Standard_Real f,l;
if (orient == TopAbs_FORWARD) {
BRep_Tool::Range(E,f,l);
return (rev) ? l : f;
}
else if (orient == TopAbs_REVERSED) {
BRep_Tool::Range(E,f,l);
return (rev) ? f : l;
}
else {
TopLoc_Location L;
const Handle(Geom_Curve)& C = BRep_Tool::Curve(E,L,f,l);
L = L.Predivided(V.Location());
if (!C.IsNull() || Degenerated(E)) {
BRep_ListIteratorOfListOfPointRepresentation itpr
((*((Handle(BRep_TVertex)*) &V.TShape()))->Points());
while (itpr.More()) {
const Handle(BRep_PointRepresentation)& pr = itpr.Value();
if (pr->IsPointOnCurve(C,L)) {
Standard_Real p = pr->Parameter();
Standard_Real res = p;// SVV 4 nov 99 - to avoid warnings on Linux
if (!C.IsNull()) {
// Closed curves RLE 16 june 94
if (Precision::IsNegativeInfinite(f)) return pr->Parameter();//p;
if (Precision::IsPositiveInfinite(l)) return pr->Parameter();//p;
gp_Pnt Pf = C->Value(f).Transformed(L.Transformation());
gp_Pnt Pl = C->Value(l).Transformed(L.Transformation());
Standard_Real tol = BRep_Tool::Tolerance(V);
if (Pf.Distance(Pl) < tol) {
if (Pf.Distance(BRep_Tool::Pnt(V)) < tol) {
if (V.Orientation() == TopAbs_FORWARD) res = f;//p = f;
else res = l;//p = l;
}
}
}
return res;//p;
}
itpr.Next();
}
}
else {
// no 3d curve !!
// let us try with the first pcurve
Handle(Geom2d_Curve) PC;
Handle(Geom_Surface) S;
BRep_Tool::CurveOnSurface(E,PC,S,L,f,l);
L = L.Predivided(V.Location());
BRep_ListIteratorOfListOfPointRepresentation itpr
((*((Handle(BRep_TVertex)*) &V.TShape()))->Points());
while (itpr.More()) {
const Handle(BRep_PointRepresentation)& pr = itpr.Value();
if (pr->IsPointOnCurveOnSurface(PC,S,L)) {
Standard_Real p = pr->Parameter();
// Closed curves RLE 16 june 94
if (PC->IsClosed()) {
if ((p == PC->FirstParameter()) ||
(p == PC->LastParameter())) {
if (V.Orientation() == TopAbs_FORWARD) p = PC->FirstParameter();
else p = PC->LastParameter();
}
}
return p;
}
itpr.Next();
}
}
}
Standard_NoSuchObject::Raise("BRep_Tool:: no parameter on edge");
return 0;
}
//=======================================================================
//function : Parameter
//purpose : Returns the parameters of the vertex on the
// pcurve of the edge on the face.
//=======================================================================
Standard_Real BRep_Tool::Parameter(const TopoDS_Vertex& V,
const TopoDS_Edge& E,
const TopoDS_Face& F)
{
TopLoc_Location L;
const Handle(Geom_Surface)& S = BRep_Tool::Surface(F,L);
return BRep_Tool::Parameter(V,E,S,L);
}
//=======================================================================
//function : Parameter
//purpose : Returns the parameters of the vertex on the
// pcurve of the edge on the surface.
//=======================================================================
Standard_Real BRep_Tool::Parameter(const TopoDS_Vertex& V,
const TopoDS_Edge& E,
const Handle(Geom_Surface)& S,
const TopLoc_Location& L)
{
// Search the vertex in the edge
Standard_Boolean rev = Standard_False;
TopoDS_Shape VF;
TopoDS_Iterator itv(E.Oriented(TopAbs_FORWARD));
while (itv.More()) {
if (V.IsSame(itv.Value())) {
if (VF.IsNull()) VF = itv.Value();
else {
rev = E.Orientation() == TopAbs_REVERSED;
if (itv.Value().Orientation() == V.Orientation())
VF = itv.Value();
}
}
itv.Next();
}
TopAbs_Orientation orient = TopAbs_INTERNAL;
if (!VF.IsNull()) orient = VF.Orientation();
Standard_Real f,l;
if (orient == TopAbs_FORWARD) {
BRep_Tool::Range(E,S,L,f,l);
return (rev) ? l : f;
}
else if (orient == TopAbs_REVERSED) {
BRep_Tool::Range(E,S,L,f,l);
return (rev) ? f : l;
}
else {
Handle(Geom2d_Curve) PC = BRep_Tool::CurveOnSurface(E,S,L,f,l);
BRep_ListIteratorOfListOfPointRepresentation itpr
((*((Handle(BRep_TVertex)*) &V.TShape()))->Points());
while (itpr.More()) {
if (itpr.Value()->IsPointOnCurveOnSurface(PC,S,L))
return itpr.Value()->Parameter();
itpr.Next();
}
}
//----------------------------------------------------------
TopLoc_Location L1;
const Handle(Geom_Curve)& C = BRep_Tool::Curve(E,L1,f,l);
L1 = L1.Predivided(V.Location());
if (!C.IsNull() || Degenerated(E)) {
BRep_ListIteratorOfListOfPointRepresentation itpr
((*((Handle(BRep_TVertex)*) &V.TShape()))->Points());
while (itpr.More()) {
const Handle(BRep_PointRepresentation)& pr = itpr.Value();
if (pr->IsPointOnCurve(C,L1)) {
Standard_Real p = pr->Parameter();
Standard_Real res = p;
if (!C.IsNull()) {
// Closed curves RLE 16 june 94
if (Precision::IsNegativeInfinite(f)) return res;
if (Precision::IsPositiveInfinite(l)) return res;
gp_Pnt Pf = C->Value(f).Transformed(L1.Transformation());
gp_Pnt Pl = C->Value(l).Transformed(L1.Transformation());
Standard_Real tol = BRep_Tool::Tolerance(V);
if (Pf.Distance(Pl) < tol) {
if (Pf.Distance(BRep_Tool::Pnt(V)) < tol) {
if (V.Orientation() == TopAbs_FORWARD) res = f;
else res = l;
}
}
}
return res;
}
itpr.Next();
}
}
//----------------------------------------------------------
Standard_NoSuchObject::Raise("BRep_Tool:: no parameter on edge");
return 0;
}
//=======================================================================
//function : Parameters
//purpose : Returns the parameters of the vertex on the face.
//=======================================================================
gp_Pnt2d BRep_Tool::Parameters(const TopoDS_Vertex& V,
const TopoDS_Face& F)
{
TopLoc_Location L;
const Handle(Geom_Surface)& S = BRep_Tool::Surface(F,L);
L = L.Predivided(V.Location());
BRep_ListIteratorOfListOfPointRepresentation itpr
((*((Handle(BRep_TVertex)*) &V.TShape()))->Points());
// It is checked if there is PointRepresentation (case non Manifold)
while (itpr.More()) {
if (itpr.Value()->IsPointOnSurface(S,L)) {
return gp_Pnt2d(itpr.Value()->Parameter(),
itpr.Value()->Parameter2());
}
itpr.Next();
}
TopoDS_Vertex Vf,Vl;
TopoDS_Edge E;
// Otherwise the edges are searched (PMN 4/06/97) It is not possible to succeed 999/1000!
// even if often there is a way to make more economically than above...
TopExp_Explorer exp;
for (exp.Init(F, TopAbs_EDGE); exp.More(); exp.Next()) {
E = TopoDS::Edge(exp.Current());
TopExp::Vertices(E, Vf, Vl);
if ((V.IsSame(Vf)) || (V.IsSame(Vl))) {
gp_Pnt2d Pf, Pl;
UVPoints(E, F, Pf, Pl);
if (V.IsSame(Vf)) return Pf;
else return Pl;//Ambiguity (natural) for degenerated edges.
}
}
Standard_NoSuchObject::Raise("BRep_Tool:: no parameters on surface");
return gp_Pnt2d(0,0);
}
//=======================================================================
//function : IsClosed
//purpose :
//=======================================================================
Standard_Boolean BRep_Tool::IsClosed (const TopoDS_Shape& theShape)
{
if (theShape.ShapeType() == TopAbs_SHELL || theShape.ShapeType() == TopAbs_SOLID)
{
NCollection_Map<TopoDS_Shape, TopTools_ShapeMapHasher> aMap (101, new NCollection_IncAllocator);
TopExp_Explorer exp (theShape.Oriented(TopAbs_FORWARD), TopAbs_EDGE);
Standard_Boolean hasBound = Standard_False;
for (; exp.More(); exp.Next())
{
const TopoDS_Edge& E = TopoDS::Edge(exp.Current());
if (BRep_Tool::Degenerated(E) || E.Orientation() == TopAbs_INTERNAL || E.Orientation() == TopAbs_EXTERNAL)
continue;
hasBound = Standard_True;
if (!aMap.Add(E))
aMap.Remove(E);
}
return hasBound && aMap.IsEmpty();
}
else if (theShape.ShapeType() == TopAbs_WIRE)
{
NCollection_Map<TopoDS_Shape, TopTools_ShapeMapHasher> aMap (101, new NCollection_IncAllocator);
TopExp_Explorer exp (theShape.Oriented(TopAbs_FORWARD), TopAbs_VERTEX);
Standard_Boolean hasBound = Standard_False;
for (; exp.More(); exp.Next())
{
const TopoDS_Shape& V = exp.Current();
if (V.Orientation() == TopAbs_INTERNAL || V.Orientation() == TopAbs_EXTERNAL)
continue;
hasBound = Standard_True;
if (!aMap.Add(V))
aMap.Remove(V);
}
return hasBound && aMap.IsEmpty();
}
return theShape.Closed();
}
//modified by NIZNHY-PKV Fri Oct 17 14:09:58 2008 f
//=======================================================================
//function : IsPlane
//purpose :
//=======================================================================
Standard_Boolean IsPlane(const Handle(Geom_Surface)& aS)
{
Standard_Boolean bRet;
Handle(Geom_Plane) aGP;
Handle(Geom_RectangularTrimmedSurface) aGRTS;
Handle(Geom_OffsetSurface) aGOFS;
//
aGRTS=Handle(Geom_RectangularTrimmedSurface)::DownCast(aS);
aGOFS=Handle(Geom_OffsetSurface)::DownCast(aS);
//
if(!aGOFS.IsNull()) {
aGP=Handle(Geom_Plane)::DownCast(aGOFS->BasisSurface());
}
else if(!aGRTS.IsNull()) {
aGP=Handle(Geom_Plane)::DownCast(aGRTS->BasisSurface());
}
else {
aGP=Handle(Geom_Plane)::DownCast(aS);
}
//
bRet=!aGP.IsNull();
//
return bRet;
}