Sphere as reference geometry failed


#1

Hello again folks :wink:

I tried to use a sphere as reference geometry, but it said: “Failed to discretize reference geometry.”

Why? And how can i make a sphere?


(Menno Deij - van Rijswijk) #2

I think because a sphere contains two “singularities” at the poles, where control points are stacked. If you make a sphere more like a football, that is, made of multiple patches, it may work better.


(Alexander Schiftner) #3

Hi, like menno said, the problem is probably caused by the very thin triangles which Rhino creates around the poles. Please try the following:

  1. Mesh the sphere yourself (use _mesh)
  2. Use a very low document tolerance (lower than the shortest edge length around the poles)
  3. Try again etSetReference