Part: Geometry - Extend Geometry Curve to query the value at parameter point directly from D0

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Use the geometry specific D0 to calculate value at parameter point.

src/Mod/Part/App/Geometry.cpp

@@ -634,6 +634,15 @@ bool GeomCurve::tangent(double u, Base::Vector3d& dir) const
     return false;
 }
 
+Base::Vector3d GeomCurve::value(double u) const
+{
+    Handle(Geom_Curve) c = Handle(Geom_Curve)::DownCast(handle());
+
+    const gp_Pnt &point = c->Value(u);
+
+    return Base::Vector3d(point.X(),point.Y(),point.Z());
+}
+
 Base::Vector3d GeomCurve::pointAtParameter(double u) const
 {
     Handle(Geom_Curve) c = Handle(Geom_Curve)::DownCast(handle());

src/Mod/Part/App/Geometry.h

@@ -203,6 +203,8 @@ public:
 
     void reverse(void);
 
+    Base::Vector3d value(double u) const;
+
 protected:
     static bool intersect(const Handle(Geom_Curve) c, const Handle(Geom_Curve) c2,
                           std::vector<std::pair<Base::Vector3d, Base::Vector3d>>& points,