Simplify/optimize bottle definition (especially the threaded neck)

[Mr.Ralf]

Hi everyone,

I just finished modeling this

bottle.gh (42.6 KB)

bottle in Grasshopper, but my definition ended up much larger and more complicated than I expected. Since I’m still learning, I’d appreciate any advice on simplifying or optimizing the workflow.

My main issue is the threaded neck. I created it using a helix, perpendicular frames, circles, and a loft. It works, but the thread is too smooth because of the circular profile.

Is there a better way to create bottle threads using a custom profile (triangle, polygon, or any curve) to get sharper, more realistic threads? Also, if you see any obvious improvements to make the whole definition cleaner or closer to the reference bottle, I’d really appreciate your suggestions.

Thanks in advance!

[martinsiegrist]

If you search for ‘bolt thread grasshopper’ you’ll find topics like this:

Cannot Seem to Make Threads with Grasshopper's Sweep1

But here’s a version of the demo which is done with a proper metric thread profile (a 36x4 male thread): [image] I have added some notes to the grasshopper file: helical thread demo v2.gh (40.9 KB) But I’d stress that this is just a demo of how sweep2 can work OK in grasshopper for this. It isn’t a tool for generating threads (although it could be a starting point for one). Regards Jeremy

[jeremy5 (Jeremy)]

As a supplementary resource, this may be helpful in choosing a thread profile: Bottle cap (STL) conversion and its bottle connector - #5 by jeremy5