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0026138: Problems with writing periodic BSplines into IGES

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Remove making BSpline surfaces rational,
Add shifting of pcurves on periodic BSpline surfaces,
Add cutting of segment from such surfaces.
Add additional check for need of make segment

Update of test-cases according to the new behavior
This commit is contained in:
ika
2015-04-30 17:04:07 +03:00
committed by bugmaster
parent ec26bf88a2
commit 31024507f6
18 changed files with 199 additions and 93 deletions
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22
src/BRepToIGES/BRepToIGES_BRWire.cxx
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@@ -32,6 +32,7 @@
#include <gp_Trsf.hxx>
#include <gp_Trsf2d.hxx>
#include <Geom_BSplineSurface.hxx>
#include <Geom_CartesianPoint.hxx>
#include <Geom_ConicalSurface.hxx>
#include <Geom_Curve.hxx>
@@ -64,6 +65,8 @@
#include <Precision.hxx>
#include <ShapeAnalysis.hxx>
#include <TColStd_HSequenceOfTransient.hxx>
#include <TopoDS.hxx>
@@ -390,6 +393,25 @@ Handle(IGESData_IGESEntity) BRepToIGES_BRWire ::TransferEdge (const TopoDS_Edge&
}
else Curve2d = Handle(Geom2d_Curve)::DownCast(Curve2d->Copy());
//shift pcurves on periodic BSpline surfaces (issue 26138)
if (Surf->IsKind(STANDARD_TYPE(Geom_BSplineSurface))) {
Handle(Geom_BSplineSurface) aBSpline = Handle(Geom_BSplineSurface)::DownCast(Surf);
Standard_Real uShift = 0., vShift = 0.;
Standard_Real U0, U1, V0, V1;
Surf->Bounds(U0, U1, V0, V1);
if (aBSpline->IsUPeriodic() && Abs(Ufirst - U0) > Precision::PConfusion()) {
uShift = ShapeAnalysis::AdjustToPeriod(Ufirst, U0, U1);
}
if (aBSpline->IsVPeriodic() && Abs(Vfirst - V0) > Precision::PConfusion()) {
vShift = ShapeAnalysis::AdjustToPeriod(Vfirst, V0, V1);
}
if (Abs(uShift) > Precision::PConfusion() || Abs(vShift) > Precision::PConfusion()) {
gp_Trsf2d TR;
TR.SetTranslation(gp_Pnt2d(0.,0.),gp_Pnt2d(uShift,vShift));
Curve2d = Handle(Geom2d_Curve)::DownCast(Curve2d->Transformed(TR));
}
}
if (!analyticMode&&((Surf->IsKind(STANDARD_TYPE(Geom_CylindricalSurface))) ||
(Surf->IsKind(STANDARD_TYPE(Geom_ConicalSurface))) ||
(Surf->IsKind(STANDARD_TYPE(Geom_SphericalSurface))))) {