private Polyline3d GetRail(Point3d startPoint, Curve curve1, Curve curve2)
{
if (!curve1.StartPoint.IsEqualTo(startPoint))
{
curve1.ReverseCurve();
}
Polyline3d polyline = null;
if (curve1 is Line line)
{
polyline = line.ToPolyline3d();
}
else if (curve1 is Spline spline)
{
polyline = (Polyline3d)spline.ToPolyline();
}
ObjectId objectId = ObjectId.Null;
App.LockAndExecute(() => objectId = polyline.AddToCurrentSpace());
var ep = polyline.EndPoint;
if (!curve2.StartPoint.IsEqualTo(ep))
{
curve2.ReverseCurve();
}
App.LockAndExecute(() =>
{
objectId.QOpenForWrite <Polyline3d>(pl =>
{
if (curve2 is Line line2)
{
var pt = line2.NextPoint(ep);
pl.AppendVertex(new PolylineVertex3d(pt));
}
else if (curve2 is Spline spline2)
{
foreach (var vertex in (Polyline3d)spline2.ToPolyline())
{
if (!((PolylineVertex3d)vertex).Position.IsEqualTo(ep))
{
var v = new PolylineVertex3d(((PolylineVertex3d)vertex).Position);
pl.AppendVertex(v);
}
}
}
});
});
return(objectId.QOpenForRead <Polyline3d>());
}