need help! FRP casting 3-dimentional shape

I going to create a 3-dimentional shape like attachment. how can I create this shape from the least number of casting moulds”.

Now my idea is like this:
- To separate the funnel into small pieces
- To approximate each pieces to part of sphere
- To evaluate the balance between accuracy of the shape and number of piece types (diameter of sphere, less is better for productivity!)

I greatly appreciate if you could help.

Thanks

Replies to This Discussion

Permalink Reply by shensansi on September 20, 2012 at 8:55pm

Thanks Thorsten

Permalink Reply by shensansi on September 20, 2012 at 8:59pm

how to approximate a surface to part of sphere?I try sphere 4pt but the result is not the same when I test in rhino.I aready update to Grasshopper 0.9.0010

Permalink Reply by shensansi on September 21, 2012 at 9:32pm

Hi all, In rhino when I do sphere4pts it fits the surface well,and in grasshopper the sphere4pts gets a smaller sphere,any ideas for this?Is there any other way in grasshopper making a sphere to fits a surface (approximate a surface to part of sphere)?