Luis,

you can always bake them. And since the app and doc members are
available within the script component, you /could/ also insert
geometry directly into Rhino from within a Script node.
If you want to add a real curve, do:

Dim C As New OnCircle(Pin, Rin)
doc.AddCurveObject(C)

Do note that it will make a new curve object every time the script is
run. If you want to replace existing geometry, you'll have to do a lot
of extra work.

--
David Rutten
Robert McNeel & Associates


On Oct 21, 5:11 pm, fraguada <[EMAIL PROTECTED]> wrote:
> SO let me get this straight...and sorry if it is naive...but evoking
> SDK commands within the Grasshopper script node just makes grasshopper
> objects, it will not make rhino editable objects?  I can live with
> that...I was staying away from doing that specifically because I
> thought it would make editable geometry in rhino, rather than Xmas
> [ cause of the green and red ;) ] geometry in Grasshopper.
>
> Luis
>
> On Oct 21, 10:08 am, David Rutten <[EMAIL PROTECTED]> wrote:
>
> > Cool, nice implementation. Nothing wrong with that script.
>
> > --
> > David Rutten
> > Robert McNeel & Associates
>
> > On Oct 21, 1:33 am, visose <[EMAIL PROTECTED]> wrote:
>
> > > I did a simple example of multiple lofts with the help of the pointers
> > > mentioned above:http://grasshopper3d.googlegroups.com/web/loftcurves.jpg
>
> > > In GH i create a 3D grid of points and I place a horizontal circle in
> > > each of the points.The radius of the circles is a function of the
> > > x,y,z values of its corresponding point (so all or most circles have a
> > > different size).
> > > Then I order the list of circles by its Z value.
> > > In the script component i select the curves that have the same X,Y
> > > position and loft them.
> > > My scripting skills are really bad, so the way i select the curves to
> > > loft was a bit of trial and error and its probably not the best way to
> > > do it. I tried to include only the necessary lines to create a loft,
> > > but there are a loft more loft options available.
>
> > > On Oct 20, 3:28 pm, David Rutten <[EMAIL PROTECTED]> wrote:
>
> > > > Hi Visose,
>
> > > > that is indeed too simplistic. The Loft component is not part of
> > > > Grasshopper, it is part of the Surface.gha file which ships alongside
> > > > grasshopper. GHA files in Grasshopper are similar to RHP files in
> > > > Rhino. There's no way for a plugin to hack into another plugin. Only
> > > > functions that are available inside Rhino core (and inside dlls you
> > > > specifically reference when you compile your plugin) can be called
> > > > from within a plugin.
>
> > > > I could make a simple Loft function in Grasshopper somewhere, which
> > > > could be used by people writing scripts. But since we (read: Dale
> > > > Fugier) are already in the process of porting all RhinoScript
> > > > functions to the SDK, I'd rather wait until V5 comes out so we can get
> > > > all this for free.
>
> > > > The EH_Box, EH_Integer, EH_Surface classes you saw indeed come from
> > > > Grasshopper. I didn't bother changing the prefixes on all classes when
> > > > the name changed to Grasshopper, and to avoid a double naming standard
> > > > I still call everything "EH_". But, these classes are not components,
> > > > they are data types. EH_Curve can be likened to OnCurve, EH_Colour is
> > > > similar to System.Drawing.Color etc. etc. These classes typically do
> > > > not offer much functionality, they merely contain data.
>
> > > > --
> > > > David Rutten
> > > > Robert McNeel & Associates
>
> > > > On Oct 20, 4:09 pm, visose <[EMAIL PROTECTED]> wrote:
>
> > > > > What I'm going to ask is probably very simplistic and naive since i
> > > > > don't know how the internals work too well.
> > > > > But when the popup list appears when writing code the are seem to be
> > > > > some GH components like EH_box, EH_circle, EH_curve (I assume EH is
> > > > > from 'explicit history').
> > > > > So I thought maybe there was a way (or there will be a way) of using
> > > > > the grasshopper component 'loft' inside the scripting component
> > > > > instead calling the SDK loft directly.
> > > > > So it would be as simple as: (here comes the most naive part of the
> > > > > post)
>
> > > > > Having as input parameter of the scripting component 'loft_curves' and
> > > > > 'A' as output:
> > > > > Dim loft As New GH_Loft()
> > > > > loft.inputcurves = loft_curves.ToArray()
> > > > > A = loft.outputgeometry
>
> > > > > On Oct 20, 1:11 pm, David Rutten <[EMAIL PROTECTED]> wrote:
>
> > > > > > Hi Adam,
>
> > > > > > Lofting is not easy. You have to construct a new instance of
> > > > > > MArgsRhinoLoft, which contains all the loft settings and curves. 
> > > > > > Then,
> > > > > > you have to call RhUtil.RhinoSdkLoftSurface and pass it your
> > > > > > arguments. There's no function in the SDK which is as easy as
> > > > > > Rhino.AddLoftSrf in RhinoScript. I agree that there should be, but
> > > > > > there isn't.
>
> > > > > > Let's assume you have a collection of 100 OnCurves, and you want to
> > > > > > loft the first 10:
>
> > > > > > 1) Create a new list of MRhinoLoftCurve and populate it using a loop
>
> > > > > > Dim loft_curves As New List(Of MRhinoLoftCurve)
> > > > > > For i As Integer = 0 To 9
> > > > > >   Dim crv_section As New MRhinoLoftCurve()
> > > > > >   crv_section.m_curve = m_original_curves(i).DuplicateCurve()
> > > > > >   crv_section.m_bClosed = m_original_curves(i).IsClosed()
> > > > > >   crv_section.m_bIsPlanar = m_original_curves(i).IsPlanar()
> > > > > >   loft_curves.Add(crv_section)
> > > > > > Next
>
> > > > > > 2) Then, create new MArgsRhinoLoft and populate the values:
>
> > > > > > Dim loft_args As New MArgsRhinoLoft()
> > > > > > loft_args.m_loftcurves = loft_curves.ToArray()
> > > > > > loft_args.SetClosed(<<value that indicates whether you want a closed
> > > > > > loft of not>>)
> > > > > > ....<<set other loft settings in similar fashion>>
>
> > > > > > 3) Finally, call the RMA.Rhino.RhUtil.RhinoSdkLoftSurface() function
> > > > > > with loft_args and an array of OnNurbsSurfaces.
>
> > > > > > --
> > > > > > David Rutten
> > > > > > Robert McNeel & Associates
>
> > > > > > On Oct 20, 1:48 pm, "Adam Holloway" <[EMAIL PROTECTED]> wrote:
>
> > > > > > > I'm relatively new to scripting.  I want to sort a number of 
> > > > > > > curves, in
> > > > > > > different lists, and then loft them periodically in the scripting
> > > > > > > component.  What is the best way to do this?  I've looked through 
> > > > > > > the sample
> > > > > > > code for SDKLoft but the different classes confused me and I 
> > > > > > > wasn't sure
> > > > > > > what was appropriate for this.
>
> > > > > > > Thanks,
> > > > > > > Adam

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