#include <TopoDS_Edge.hxx>
#include <TopoDS_Face.hxx>
#include <TopoDS_Vertex.hxx>
+#include <TopoDS_Iterator.hxx>
#include <BRep_Tool.hxx>
#include <BRep_Builder.hxx>
+#include <BRepTools.hxx>
+#include <BRepAdaptor_Curve2d.hxx>
+#include <BRepTopAdaptor_FClass2d.hxx>
-#include <BRepGProp.hxx>
-#include <GProp_GProps.hxx>
-
+#include <ElSLib.hxx>
+#include <Geom_Circle.hxx>
+#include <Geom_TrimmedCurve.hxx>
#include <Geom_SphericalSurface.hxx>
#include <Geom_RectangularTrimmedSurface.hxx>
//function : NewSurface
//purpose :
//=======================================================================
-static Standard_Boolean ModifySurface(const TopoDS_Face& aFace,
- const Handle(Geom_Surface)& aSurface,
- Handle(Geom_Surface)& aNewSurface)
+static Standard_Boolean ModifySurface(const TopoDS_Face& theFace,
+ const Handle(Geom_Surface)& theSurface,
+ Handle(Geom_Surface)& theNewSurface)
{
- Handle(Geom_Surface) S = aSurface;
- if(S->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface))) {
+ TopoDS_Face aFace = theFace;
+ aFace.Orientation (TopAbs_FORWARD);
+
+ Handle(Geom_Surface) aNewSurface;
+
+ Handle(Geom_Surface) aSurf = theSurface;
+ if (aSurf->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface))) {
Handle(Geom_RectangularTrimmedSurface) RTS =
- Handle(Geom_RectangularTrimmedSurface)::DownCast(S);
- S = RTS->BasisSurface();
+ Handle(Geom_RectangularTrimmedSurface)::DownCast(aSurf);
+ aSurf = RTS->BasisSurface();
}
- if(S->IsKind(STANDARD_TYPE(Geom_SphericalSurface))) {
+ if (aSurf->IsKind(STANDARD_TYPE(Geom_SphericalSurface))) {
Standard_Real Umin, Umax, Vmin, Vmax;
- ShapeAnalysis::GetFaceUVBounds(aFace,Umin, Umax, Vmin, Vmax);
+ ShapeAnalysis::GetFaceUVBounds (aFace, Umin, Umax, Vmin, Vmax);
Standard_Real PI2 = M_PI/2.;
- if(Vmax > PI2 - Precision::PConfusion() || Vmin < -PI2+::Precision::PConfusion()) {
- Handle(Geom_SphericalSurface) aSphere = Handle(Geom_SphericalSurface)::DownCast(S);
- gp_Sphere sp = aSphere->Sphere();
- //modified by jgv, 12.11.2012 for issue 21777//
- Standard_Real Radius = sp.Radius();
- Standard_Real HalfArea = 2.*M_PI*Radius*Radius;
- GProp_GProps Properties;
- BRepGProp::SurfaceProperties(aFace, Properties);
- Standard_Real anArea = Properties.Mass();
- Standard_Real AreaTol = Radius*Radius*1.e-6;
- if (anArea > HalfArea - AreaTol) //no chance to avoid singularity
- return Standard_False;
- ///////////////////////////////////////////////
- gp_Ax3 ax3 = sp.Position();
- if(Abs(Vmax-Vmin) < PI2) {
- gp_Ax3 axnew3(ax3.Axis().Location(), ax3.Direction()^ax3.XDirection(),ax3.XDirection());
- sp.SetPosition(axnew3);
- Handle(Geom_SphericalSurface) aNewSphere = new Geom_SphericalSurface(sp);
- aNewSurface = aNewSphere;
- return Standard_True;
- }
- else {
- gp_Pnt PC = ax3.Location();
- Standard_Real Vpar;
- if(fabs(PI2-Vmax)>fabs(-PI2-Vmin))
- Vpar = (PI2+Vmax)/2.;
- else
- Vpar = (-PI2+Vmin)/2.;
- Standard_Real Upar = (Umin+Umax)/2.;;
- gp_Pnt PN,PX;
- S->D0(Upar,Vpar,PN);
- S->D0(Upar+PI2,0.,PX);
- gp_Dir newNorm(gp_Vec(PC,PN));
- gp_Dir newDirX(gp_Vec(PC,PX));
- gp_Ax3 axnew3(ax3.Axis().Location(), newNorm, newDirX);
- sp.SetPosition(axnew3);
- Handle(Geom_SphericalSurface) aNewSphere = new Geom_SphericalSurface(sp);
- aNewSurface = aNewSphere;
- return Standard_True;
- }
- }
+ Handle(Geom_SphericalSurface) aSphere = Handle(Geom_SphericalSurface)::DownCast(aSurf);
+ gp_Sphere sp = aSphere->Sphere();
+ Standard_Real Radius = sp.Radius();
+ gp_Ax3 ax3 = sp.Position();
+ gp_Pnt aCentre = sp.Location();
+
+ TopoDS_Wire aWire = BRepTools::OuterWire (aFace);
+ BRepTopAdaptor_FClass2d aClassifier (aFace, Precision::PConfusion());
+ TopTools_MapOfShape aEmap;
+ const Standard_Real anOffsetValue = 0.01*M_PI;
+ for (Standard_Integer ii = 1; ii <= 2; ii++)
+ {
+ TopoDS_Iterator itw (aWire);
+ for (; itw.More(); itw.Next())
+ {
+ const TopoDS_Edge& anEdge = TopoDS::Edge (itw.Value());
+ if (aEmap.Contains (anEdge) ||
+ anEdge.Orientation() == TopAbs_INTERNAL ||
+ anEdge.Orientation() == TopAbs_EXTERNAL ||
+ BRep_Tool::Degenerated (anEdge) ||
+ BRepTools::IsReallyClosed (anEdge, aFace))
+ continue;
+
+ BRepAdaptor_Curve2d aBAcurve2d (anEdge, aFace);
+ GeomAbs_CurveType aType = aBAcurve2d.GetType();
+ if (ii == 1 && aType == GeomAbs_Line) //first pass: consider only curvilinear edges
+ continue;
+
+ Standard_Real aMidPar = (aBAcurve2d.FirstParameter() + aBAcurve2d.LastParameter())/2;
+ gp_Pnt2d aMidP2d;
+ gp_Vec2d aTangent;
+ aBAcurve2d.D1 (aMidPar, aMidP2d, aTangent);
+ if (anEdge.Orientation() == TopAbs_REVERSED)
+ aTangent.Reverse();
+
+ aTangent.Normalize();
+ gp_Vec2d aNormal (aTangent.Y(), -aTangent.X());
+ aNormal *= anOffsetValue;
+ gp_Pnt2d anUpperPole = aMidP2d.Translated (aNormal);
+ if (anUpperPole.Y() < -PI2 || anUpperPole.Y() > PI2)
+ {
+ aEmap.Add(anEdge);
+ continue;
+ }
+ if (anUpperPole.X() < 0.)
+ anUpperPole.SetX (anUpperPole.X() + 2.*M_PI);
+ else if (anUpperPole.X() > 2.*M_PI)
+ anUpperPole.SetX (anUpperPole.X() - 2.*M_PI);
+
+ TopAbs_State aStatus = aClassifier.Perform (anUpperPole);
+ if (aStatus != TopAbs_OUT)
+ {
+ aEmap.Add(anEdge);
+ continue;
+ }
+
+ gp_Pnt anUpperPole3d = aSphere->Value (anUpperPole.X(), anUpperPole.Y());
+ gp_Vec aVec (aCentre, anUpperPole3d);
+ aVec.Reverse();
+ gp_Pnt aLowerPole3d = aCentre.Translated (aVec);
+ Standard_Real aU, aV;
+ ElSLib::Parameters (sp, aLowerPole3d, aU, aV);
+ gp_Pnt2d aLowerPole (aU, aV);
+ aStatus = aClassifier.Perform (aLowerPole);
+ if (aStatus != TopAbs_OUT)
+ {
+ aEmap.Add(anEdge);
+ continue;
+ }
+
+ //Build a meridian
+ gp_Vec anUp (aCentre, anUpperPole3d);
+ anUp.Normalize();
+ gp_Pnt aMidPnt = aSphere->Value (aMidP2d.X(), aMidP2d.Y());
+ gp_Vec aMidOnEdge (aCentre, aMidPnt);
+ aMidOnEdge.Normalize();
+ gp_Vec AxisOfCircle = anUp ^ aMidOnEdge;
+ gp_Vec XDirOfCircle = anUp ^ AxisOfCircle;
+ gp_Ax2 anAxis (aCentre, AxisOfCircle, XDirOfCircle);
+ Handle(Geom_Circle) aCircle = new Geom_Circle (anAxis, Radius);
+ Handle(Geom_TrimmedCurve) aMeridian = new Geom_TrimmedCurve (aCircle, -PI2, PI2);
+
+ //Check the meridian
+ Standard_Boolean IsInnerPointFound = Standard_False;
+ Standard_Integer NbSamples = 10;
+ Standard_Real aDelta = M_PI / NbSamples;
+ for (Standard_Integer jj = 1; jj < NbSamples; jj++)
+ {
+ Standard_Real aParam = -PI2 + jj*aDelta;
+ gp_Pnt aPnt = aMeridian->Value (aParam);
+ ElSLib::Parameters (sp, aPnt, aU, aV);
+ gp_Pnt2d aP2d (aU, aV);
+ aStatus = aClassifier.Perform (aP2d);
+ if (aStatus != TopAbs_OUT)
+ {
+ IsInnerPointFound = Standard_True;
+ break;
+ }
+ }
+ if (IsInnerPointFound)
+ {
+ aEmap.Add(anEdge);
+ continue;
+ }
+
+ gp_Ax3 anAxisOfNewSphere (aCentre, anUp, XDirOfCircle);
+ aNewSurface = new Geom_SphericalSurface (anAxisOfNewSphere, Radius);
+ break;
+ } //for (; itw.More(); itw.Next()) (iteration on outer wire)
+ if (!aNewSurface.IsNull())
+ break;
+ } //for (Standard_Integer ii = 1; ii <= 2; ii++) (two passes)
}
- return Standard_False;
+
+ if (aNewSurface.IsNull())
+ return Standard_False;
+
+ theNewSurface = aNewSurface;
+ return Standard_True;
}
Standard_Boolean BlockFix_SphereSpaceModifier::NewSurface(const TopoDS_Face& F,
