Sorry... I forgot to post the screenshot.  Here's it is:
http://grasshopper3d.googlegroups.com/web/Ref%20geometry%20vs%20volatile%20data.jpg?hl=en&gsc=3L4oERYAAACLRfmXWhhI7MiT3Ze_SvPmg-kXU5InE09W2o0GCSVgCQ


On Feb 9, 6:47 pm, Rchitekt <[email protected]> wrote:
> Is there any difference in the way Grasshopper deals with Referenced
> Geometry vs. Volatile Data (aside from the fact that one has
> persistent data and the other is not).  The reason I ask if that I
> have 2 closed polylines that overlap each other, and I'm trying to get
> the inside polyline... almost like a Curve Difference instead of a
> Curve Union.  So, I've created a simple definition that creates a
> planar srf out of both polylines and then using the Solid Union it
> creates an object with a set of different faces.  Using a little math
> you can eliminate all of the smaller faces so that your left with the
> one big face in the middle which is just like creating a Curve
> Difference (I think).  Anyway, the code seems to work when I select
> each curve from Rhino using referenced geometry.  However, if I feed
> those same curves into the curve data using volatile data, the Solid
> Union fails which throws off the rest of the definition.  So, my
> question is, why would it work with referenced geometry but not with
> volatile data?
> I guess I can always bake the curves into my scene and then re-assign
> them back into my definition but it seems like I'm having to go around
> my butt to get to by elbow.
> Thoughts?

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