incremental and decremental series : How to ?

Hi I'm quite new in grasshopper.

I have a curve and it spin around an axis moving in Z axis ( this create kind of a ribbon ) .... I just do it with a series on Z vector of the move of the curve.

Now I want to move each of this curves incremental of a value in X vector for the half of the value of the number of the curve ( set already on a slider ) than decrement for the same incremental value.

How can I do it ?

As you can see in the picture attached I have already create a working definition and the X moving vector work pretty good ... but always increment.

I just need to interrupt or invert its behaviour from the half of the Flange count so every time I move the flange count slider ... the curve move out for the first half of the series and then in for the second half.

Thank you everybody for the help

Attachments:

1.jpg, 1.8 MB

Replies to This Discussion

Permalink Reply by Joseph Oster on June 29, 2015 at 12:53pm

CORRECTION: small, off-by-one error prevented the full 0 to 1 range from being used, meaning it didn't return to zero (and didn't quite reach 'max' either). Fixed by adjusting the series increment from 1 to 'FlangeCount / (FlangeCount - 1)'.

Attachments:

SpinningCurves_2015Jun29d2.gh, 20 KB

Permalink Reply by simbiosi on June 30, 2015 at 7:30am

This is nice ... but It isn't what I need ..... I need to change the arc dimension of each flange ... increasing ... and the decreasing for the half of the number of the flange.

The way you did just change the shape of the helix but the flange from the start to the end remain always the same.

Permalink Reply by Joseph Oster on June 30, 2015 at 7:53am

The examples I wrote are good guides for whatever changes you need to make. Cheers!