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Detect external geometry that is a circle which becomes a bspline after projection

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jrheinlaender 2013-07-03 11:51:58 +02:00 committed by Stefan Tröger
parent 9e7b463113
commit 97fb44ddd5
1 changed files with 27 additions and 0 deletions
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27
src/Mod/Sketcher/App/SketchObject.cpp
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@ -46,6 +46,9 @@
# include <BRepBuilderAPI_MakeEdge.hxx>
# include <GeomAPI_IntSS.hxx>
# include <BRepProj_Projection.hxx>
# include <GeomConvert_BSplineCurveKnotSplitting.hxx>
# include <TColStd_Array1OfInteger.hxx>
# include <GC_MakeCircle.hxx>
# include <Standard_Version.hxx>
# include <cmath>
# include <vector>
@ -3246,6 +3249,30 @@ void SketchObject::rebuildExternalGeometry(void)
arc->Construction = true;
ExternalGeo.push_back(arc);
}
} else if (projCurve.GetType() == GeomAbs_BSplineCurve) {
// Unfortunately, a normal projection of a circle can also give a Bspline
// Split the spline into arcs
GeomConvert_BSplineCurveKnotSplitting bSplineSplitter(projCurve.BSpline(), 2);
//int s = bSplineSplitter.NbSplits();
if ((curve.GetType() == GeomAbs_Circle) && (bSplineSplitter.NbSplits() == 2)) {
// Result of projection is actually a circle...
TColStd_Array1OfInteger splits(1, 2);
bSplineSplitter.Splitting(splits);
gp_Pnt p1 = projCurve.Value(splits(1));
gp_Pnt p2 = projCurve.Value(splits(2));
gp_Pnt p3 = projCurve.Value(0.5 * (splits(1) + splits(2)));
GC_MakeCircle circleMaker(p1, p2, p3);
Handle_Geom_Circle circ = circleMaker.Value();
Part::GeomCircle* circle = new Part::GeomCircle();
circle->setRadius(circ->Radius());
gp_Pnt center = circ->Axis().Location();
circle->setCenter(Base::Vector3d(center.X(), center.Y(), center.Z()));
circle->Construction = true;
ExternalGeo.push_back(circle);
} else {
throw Base::Exception("BSpline: Not yet supported geometry for external geometry");
}
}
else if (projCurve.GetType() == GeomAbs_Ellipse) {
gp_Elips e = projCurve.Ellipse();