Grasshopper

algorithmic modeling for Rhino

Hi,
I am trying to explore the VB part of grasshopper. I am reading a set of data from excel, drawing the lines via VB and then wanting to draw a cylinder using those lines as the axis. I am not getting the cylinder to be displayed in the Rhino window despite the cylinder being "valid" as reported by the function" cylinder.IsValid".

I am able to draw spheres, circles, cones and other basic geometry just fine. Does anyone have any suggestions?

Thanks.

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You have to convert the cylinder to a surface first. Try something like this:

Dim c As New OnCylinder(New OnCircle(onutil.On_xy_plane, 2), 4)
Dim srf As New OnNurbsSurface
c.GetNurbForm(srf)
a = srf

Since other primitives like spheres are passed along as surfaces automatically, i think David forgot the autoconversion for cylinders.
Thanks.
That seem to have fixed it.

Kermin

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