Can GH realize loop by its components, or has to refer to script (python, vb...)?

Grasshopper
1

This question puzzles me for a while.
As you see, there are three groups of points (1, 2, 3). I want to find the shortest line from the points of upper group to points in lower group. Now I have created the lines from group 1 to group 2. But if I want to continue to create group 2 to 3, or if there are more groups…, I have to re-create the same lines. If there some components to realize the loop, or I have to use Python?
Thanks for any suggestion or idea!

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points.gh (15.3 KB) points.3dm (28.7 KB)

2

Grasshopper can not natively loop. You can script a loop or use a plugin like Anemone.

3

Thank you so much for your suggestion! I will try it soon!

4

This could be one way of doing it without loop.

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points_re.gh (9.4 KB)

5

If you use Closest Point, you can get the same result but sometimes if there are two points that have same distance, than the result would be slightly different…

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points_reV2.gh (13.2 KB)

6

Hi Kim, thank you so much for your kindness! I really need some time to understand your programming:)

7

Hi Kim,
I studied your programming carefully. It has a very smart strategy! And it works for any number of point groups. However, I still don’t understand why you use the “reverse” for W and “-1” for S in the for the shift list component. I tried different settings for shift list but the results were all failed. Could you please have a more detailed explanation on this?
Thank you very much!

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8

Most of the GH components do not require much explanation as they can easily tell the difference by using them.

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1 Like
9

That’s clear. You are right, I should use them more.
Thanks again, Kim, and have a nice week!!