Help!, need to use the last point ina list as reference to the next one.

Hello guys:

I'm working in a definition for a Golden spiral made with quarter circles but I hit a brick wall.

I need to make the sipral as long as needed but in order to do that I want to draw a set of points from point A to B, B to C, C to D... but the only way I can do this is by manually taking the last point i generated and run it again in a new set.

Is there a way to tell GH to use the last point of a list as a new reference? because all I'm getting is point A to B, A to C, A to D...

I'm sure this is a super easy matter but I'm not getting there.

Thank you very much for your time guys.

Ps. Here's a copy of my work so far.

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Help with points.gh, 23 KB

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Permalink Reply by David Rutten on December 29, 2014 at 6:11pm

You can shift the list one item to the right. This will allow you to match values against the previous value.

Since the spiral is not closed, you'll also have to set the shift wrap to false, and then make sure the lists have the same length.

It's usually a bad idea to run values through Text Panels. It's fine to use panels to examine values, but numbers are typically rounded to 6 decimal places when displayed on the panel, so you lose accuracy by converting your numbers to text, then back to numbers again.

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