Task #3231: Sketcher Offset of a curve

[modules/shaper.git] / src / GeomAPI / GeomAPI_BSpline.cpp

diff --git a/src/GeomAPI/GeomAPI_BSpline.cpp b/src/GeomAPI/GeomAPI_BSpline.cpp
index cb2aef956615926a3dc704c2ef10e3eb16ce8910..b785aa77b0e269e31964be9838d4c2493d7b84c3 100644 (file)
--- a/src/GeomAPI/GeomAPI_BSpline.cpp
+++ b/src/GeomAPI/GeomAPI_BSpline.cpp
@@ -22,9 +22,11 @@
 
 #include <Geom_BSplineCurve.hxx>
 
+#include <GeomConvert.hxx>
+
 #define MY_BSPLINE (*(implPtr<Handle_Geom_BSplineCurve>()))
 
-GeomAPI_BSpline::GeomAPI_BSpline(const GeomCurvePtr& theCurve)
+GeomAPI_BSpline::GeomAPI_BSpline (const GeomCurvePtr& theCurve)
 {
   GeomCurvePtr anUntrimmedCurve = theCurve->basisCurve();
   Handle(Geom_Curve) aCurve = anUntrimmedCurve->impl<Handle(Geom_Curve)>();
@@ -76,3 +78,20 @@ bool GeomAPI_BSpline::isPeriodic() const
 {
   return MY_BSPLINE->IsPeriodic();
 }
+
+GeomBSplinePtr GeomAPI_BSpline::convertToBSpline (const GeomCurvePtr& theCurve)
+{
+  GeomCurvePtr anUntrimmedCurve = theCurve->basisCurve();
+  Handle(Geom_Curve) aCurve = anUntrimmedCurve->impl<Handle(Geom_Curve)>();
+  Handle(Geom_BSplineCurve) aBSpl = Handle(Geom_BSplineCurve)::DownCast(aCurve);
+  if (aBSpl.IsNull()) {
+    // convert to b-spline
+    aBSpl = GeomConvert::CurveToBSplineCurve(aCurve);
+  }
+  if (aBSpl.IsNull())
+    throw Standard_ConstructionError("GeomAPI_BSpline: Conversion to B-spline failed");
+  GeomCurvePtr aResCurve (new GeomAPI_Curve());
+  aResCurve->setImpl(new Handle_Geom_BSplineCurve(aBSpl));
+  GeomBSplinePtr aResult (new GeomAPI_BSpline(aResCurve));
+  return aResult;
+}