Grasshopper

algorithmic modeling for Rhino

Find period/module of helix

Hi all, 

I am trying to produce a section of a double helix which can be repeated in modules. 

I have successfully modelled the helix, however I had thought the period of a helix was 2*pi.

I am hoping to pipe the helix and then cut it into repeatable modules. Given the end of the pipe I am thinking I will have to produce 3 complete revolutions and use only the central one

Could anyone help with finding the correct module (period) of a helix please?

Many thanks all 

J-P

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Permalink Reply by Hyungsoo Kim on August 7, 2017 at 1:05pm

Hi.

Is this what you are after?

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Permalink Reply by Igor on August 7, 2017 at 1:25pm

 Simple method....

Permalink Reply by J-P on August 7, 2017 at 1:42pm

Hello all, 

Thanks for the replies. 

Its not exactly what I was meaning. Please see attached image - i hope this will more clearly explain. 

I am hoping to end calculating the module shown right 

This image is not a true representation as I had to rotate the three individual elements as I cannot work out where exactly to cut the helix to obtain one turn / pitch .... (that feels like a good explanation of my aim)

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Permalink Reply by Hyungsoo Kim on August 8, 2017 at 12:07am

Check this as well.

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