Some Questions about Elliptical Curve


While doing my project on grasshopper, I got stuck unable to close an elliptical curve.
So I want to ask if,

  1. Can’t an Elliptical Curve be closed ?
  2. Why does a moved Elliptical Curve change into a Closed Planar Curve ? (Is it the reason it can’t be closed?)

Thanks in advance. (351.5 KB)

The problem is in the upstream of your code. If you bake the cuves out of the Join Curves component then explode them, you will see a duplicate curve. When you join same curves together, they become closed curve.
The order “0” and “2” are the same curve in that list. Why did you list the same curve and join them together?

1 Like

Aaah… I want to make an arch as an output, out of a gap between two circles. And the case is when the gap between the circles is 0. So normally there would be 3 items in the list…


In this case, I think an operation like this would be necessary.

But I don’t know how to make that happen, to my chagrin.
Could anyone help me with that too…?