private static ElementId createModelCurve(Document document, Curve curve, SketchPlane sp = null)
{
Line line = curve as Line;
Arc arc = curve as Arc;
Ellipse ellipse = curve as Ellipse;
HermiteSpline spline = curve as HermiteSpline;
NurbSpline nbSpline = curve as NurbSpline;
if (line != null && null == sp)
{
XYZ normal = getVertVec(line.Direction).Normalize();
XYZ origin = line.GetEndPoint(0);
sp = SketchPlane.Create(document, Plane.CreateByNormalAndOrigin(normal, origin));
}
else if (arc != null && null == sp)
{
XYZ normal = arc.Normal;
sp = SketchPlane.Create(document, Plane.CreateByNormalAndOrigin(normal, arc.Center));
}
else if (ellipse != null && null == sp)
{
XYZ normal = ellipse.Normal;
sp = SketchPlane.Create(document, Plane.CreateByNormalAndOrigin(normal, ellipse.Center));
}
else if (spline != null && null == sp)
{
Transform tran = spline.ComputeDerivatives(0, false);
XYZ normal = getVertVec(tran.BasisX).Normalize();
XYZ origin = spline.GetEndPoint(0);
sp = SketchPlane.Create(document, Plane.CreateByNormalAndOrigin(normal, origin));
}
else if (nbSpline != null && null == sp)
{
Transform tran = nbSpline.ComputeDerivatives(0, false);
XYZ normal = getVertVec(tran.BasisX).Normalize();
XYZ origin = nbSpline.GetEndPoint(0);
sp = SketchPlane.Create(document, Plane.CreateByNormalAndOrigin(normal, origin));
}
if (sp == null)
{
throw new ArgumentException("Not valid sketchplane to create curve:" + curve.GetType().Name);
}
//
// create model line with curve and the specified sketch plane.
ModelCurve mCurve = document.Create.NewModelCurve(curve, sp);
return((null != mCurve) ? mCurve.Id : ElementId.InvalidElementId);
}