Bivalve shell Algorithm

This is a simple algorithm I made in Grasshopper to make bivalve shells.

It uses rotation and scale to make the shell. The input is a closed nurb curve with three control points but you can give any curve as input. remember the rotation point uses the Tangent to roatet the curve so changing the point will give different results!

This algorithm makes creases on a smooth curve (the A block) and then makes it a shell so it's better to give it a smooth curve to get a shell with creases. if you dont want the creases simply delete the Part A of the grasshopper difintion and use the param curve for input + connect it to the Eval function.

Hope you like it :)

~M.Y~

Tags: &, bivalve, nature, rotation, scale, seashell

Attachments:

05-shell.ghx, 322 KB
shell.3dm, 21 KB

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Permalink Reply by Ali Habibian on August 29, 2011 at 12:26am

mr yazdi...it,s very nice...gr8

The final volume is made up of cruve or surf????!!

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Permalink Reply by Mohammad Yazdi on August 29, 2011 at 1:56am

Thanks Ali

The final shell is a lofted surface ! You can easily make the surface from the rotated-scaled curves.

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Permalink Reply by ryles on August 29, 2011 at 6:44am

sweet, thanks for sharing!

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Permalink Reply by Mohammad Yazdi on August 30, 2011 at 4:45am

You're welcome :)

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Permalink Reply by Maurizio Barberio on March 9, 2012 at 5:04am

thank u!

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Permalink Reply by ladan vojdanzadeh on December 17, 2012 at 6:37am

your input is a curve and you made a surface from the rotated-scaled curves.

if i have a special suface that i made it in rhino. like pic. how could i make track on it. as you did.

Attachments:

1.jpg, 33 KB

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Permalink Reply by ladan vojdanzadeh on December 17, 2012 at 6:49am

your input is a curve and you made a surface from the rotated-scaled curves.

if i have a special suface that i made it in rhino. like pic. how could i make track on it. as you did.

Attachments:

1.jpg, 33 KB

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Permalink Reply by roderick read on December 19, 2012 at 1:11pm

Wow, I was discussing designing a structure like a bi-valve mollusc last night on the yahoo airborne wind energy tech group... this is cool and will inspire something no doubt.