}
}
+//=======================================================================
+//function : EdgeToBSpline
+//purpose : auxiliary -- get curve from edge and convert it to bspline
+// parameterized from 0 to 1
+//=======================================================================
+
+// NOTE: this code duplicates the same function in BRepFill_NSections.cxx
+static Handle(Geom_BSplineCurve) EdgeToBSpline (const TopoDS_Edge& theEdge)
+{
+ Handle(Geom_BSplineCurve) aBSCurve;
+ if (BRep_Tool::Degenerated(theEdge)) {
+ // degenerated edge : construction of a point curve
+ TColStd_Array1OfReal aKnots (1,2);
+ aKnots(1) = 0.;
+ aKnots(2) = 1.;
+
+ TColStd_Array1OfInteger aMults (1,2);
+ aMults(1) = 2;
+ aMults(2) = 2;
+
+ TColgp_Array1OfPnt aPoles(1,2);
+ TopoDS_Vertex vf, vl;
+ TopExp::Vertices(theEdge,vl,vf);
+ aPoles(1) = BRep_Tool::Pnt(vf);
+ aPoles(2) = BRep_Tool::Pnt(vl);
+
+ aBSCurve = new Geom_BSplineCurve (aPoles, aKnots, aMults, 1);
+ }
+ else
+ {
+ // get the curve of the edge
+ TopLoc_Location aLoc;
+ Standard_Real aFirst, aLast;
+ Handle(Geom_Curve) aCurve = BRep_Tool::Curve (theEdge, aLoc, aFirst, aLast);
+
+ // convert its part used by edge to bspline; note that if edge curve is bspline,
+ // conversion made via trimmed curve is still needed -- it will copy it, segment
+ // as appropriate, and remove periodicity if it is periodic (deadly for approximator)
+ Handle(Geom_TrimmedCurve) aTrimCurve = new Geom_TrimmedCurve (aCurve, aFirst, aLast);
+
+ // special treatment of conic curve
+ if (aTrimCurve->BasisCurve()->IsKind(STANDARD_TYPE(Geom_Conic)))
+ {
+ GeomConvert_ApproxCurve anAppr (aTrimCurve, Precision::Confusion(), GeomAbs_C1, 16, 14);
+ if (anAppr.HasResult())
+ aBSCurve = anAppr.Curve();
+ }
+
+ // general case
+ if (aBSCurve.IsNull())
+ aBSCurve = GeomConvert::CurveToBSplineCurve (aTrimCurve);
+
+ // apply transformation if needed
+ if (! aLoc.IsIdentity())
+ aBSCurve->Transform (aLoc.Transformation());
+
+ // reparameterize to [0,1]
+ TColStd_Array1OfReal aKnots (1, aBSCurve->NbKnots());
+ aBSCurve->Knots (aKnots);
+ BSplCLib::Reparametrize (0., 1., aKnots);
+ aBSCurve->SetKnots (aKnots);
+ }
+
+ // reverse curve if edge is reversed
+ if (theEdge.Orientation() == TopAbs_REVERSED)
+ aBSCurve->Reverse();
+
+ return aBSCurve;
+}
+
//=======================================================================
//function : TotalSurf
//purpose :
{
Standard_Integer i,j,jdeb=1,jfin=NbSects;
TopoDS_Edge edge;
- TopLoc_Location loc;
- Standard_Real first, last;
TopoDS_Vertex vf,vl;
GeomFill_SectionGenerator section;
TColStd_Array1OfReal Bounds(1,2);
Bounds(1) = 0.;
Bounds(2) = 1.;
- Standard_Integer Deg = 1;
TColStd_Array1OfInteger Mult(1,2);
- Mult(1) = Deg+1;
- Mult(2) = Deg+1;
+ Mult(1) = 2;
+ Mult(2) = 2;
Handle(Geom_BSplineCurve) BSPoint
- = new Geom_BSplineCurve(Extremities,Bounds,Mult,Deg);
+ = new Geom_BSplineCurve(Extremities,Bounds,Mult,1);
section.AddCurve(BSPoint);
}
else {
// read the first edge to initialise CompBS;
- edge = TopoDS::Edge(shapes((j-1)*NbEdges+1));
- if (BRep_Tool::Degenerated(edge)) {
- // degenerated edge : construction of a punctual curve
- TopExp::Vertices(edge,vl,vf);
- TColgp_Array1OfPnt Extremities(1,2);
- Extremities(1) = BRep_Tool::Pnt(vf);
- Extremities(2) = BRep_Tool::Pnt(vl);
- Handle(Geom_Curve) curv = new Geom_BezierCurve(Extremities);
- curvTrim = new Geom_TrimmedCurve(curv,
- curv->FirstParameter(),
- curv->LastParameter());
- }
- else {
- // recover the curve on the edge
- Handle(Geom_Curve) curv = BRep_Tool::Curve(edge, loc, first, last);
- curvTrim = new Geom_TrimmedCurve(curv, first, last);
- curvTrim->Transform(loc.Transformation());
- }
- if (edge.Orientation() == TopAbs_REVERSED) {
- curvTrim->Reverse();
- }
+ TopoDS_Edge aPrevEdge = TopoDS::Edge (shapes((j-1)*NbEdges+1));
+ Handle(Geom_BSplineCurve) curvBS = EdgeToBSpline (aPrevEdge);
- // transformation into BSpline reparameterized on [i-1,i]
- curvBS = Handle(Geom_BSplineCurve)::DownCast(curvTrim);
- if (curvBS.IsNull()) {
- Handle(Geom_Curve) theCurve = curvTrim->BasisCurve();
- if (theCurve->IsKind(STANDARD_TYPE(Geom_Conic)))
- {
- GeomConvert_ApproxCurve appr(curvTrim, Precision::Confusion(), GeomAbs_C1, 16, 14);
- if (appr.HasResult())
- curvBS = appr.Curve();
- }
- if (curvBS.IsNull())
- curvBS = GeomConvert::CurveToBSplineCurve(curvTrim);
- }
- TColStd_Array1OfReal BSK(1,curvBS->NbKnots());
- curvBS->Knots(BSK);
- BSplCLib::Reparametrize(0.,1.,BSK);
- curvBS->SetKnots(BSK);
-
// initialization
GeomConvert_CompCurveToBSplineCurve CompBS(curvBS);
for (i=2; i<=NbEdges; i++) {
// read the edge
- edge = TopoDS::Edge(shapes((j-1)*NbEdges+i));
- if (BRep_Tool::Degenerated(edge)) {
- // degenerated edge : construction of a punctual curve
- TopExp::Vertices(edge,vl,vf);
- TColgp_Array1OfPnt Extremities(1,2);
- Extremities(1) = BRep_Tool::Pnt(vf);
- Extremities(2) = BRep_Tool::Pnt(vl);
- Handle(Geom_Curve) curv = new Geom_BezierCurve(Extremities);
- curvTrim = new Geom_TrimmedCurve(curv,
- curv->FirstParameter(),
- curv->LastParameter());
- }
- else {
- // return the curve on the edge
- Handle(Geom_Curve) curv = BRep_Tool::Curve(edge, loc, first, last);
- curvTrim = new Geom_TrimmedCurve(curv, first, last);
- curvTrim->Transform(loc.Transformation());
- }
- if (edge.Orientation() == TopAbs_REVERSED) {
- curvTrim->Reverse();
- }
-
- // transformation into BSpline reparameterized on [i-1,i]
- curvBS = Handle(Geom_BSplineCurve)::DownCast(curvTrim);
- if (curvBS.IsNull()) {
- Handle(Geom_Curve) theCurve = curvTrim->BasisCurve();
- if (theCurve->IsKind(STANDARD_TYPE(Geom_Conic)))
- {
- GeomConvert_ApproxCurve appr(curvTrim, Precision::Confusion(), GeomAbs_C1, 16, 14);
- if (appr.HasResult())
- curvBS = appr.Curve();
- }
- if (curvBS.IsNull())
- curvBS = GeomConvert::CurveToBSplineCurve(curvTrim);
- }
- TColStd_Array1OfReal BSK(1,curvBS->NbKnots());
- curvBS->Knots(BSK);
- BSplCLib::Reparametrize(i-1,i,BSK);
- curvBS->SetKnots(BSK);
+ TopoDS_Edge aNextEdge = TopoDS::Edge (shapes((j-1)*NbEdges+i));
+ curvBS = EdgeToBSpline (aNextEdge);
// concatenation
- CompBS.Add(curvBS,
- Precision::Confusion(),
- Standard_True,
- Standard_False,
- 1);
+ CompBS.Add(curvBS, Precision::Confusion(), Standard_True, Standard_False, 1);
}
// return the final section
TColStd_Array1OfReal Bounds(1,2);
Bounds(1) = 0.;
Bounds(2) = 1.;
- Standard_Integer Deg = 1;
TColStd_Array1OfInteger Mult(1,2);
- Mult(1) = Deg+1;
- Mult(2) = Deg+1;
+ Mult(1) = 2;
+ Mult(2) = 2;
Handle(Geom_BSplineCurve) BSPoint
- = new Geom_BSplineCurve(Extremities,Bounds,Mult,Deg);
+ = new Geom_BSplineCurve(Extremities,Bounds,Mult,1);
section.AddCurve(BSPoint);
}
projects / occt.git / blobdiff