how to draw lines between each pair of points for a group of points

Replies to This Discussion

Permalink Reply by Grasshope on October 5, 2016 at 12:09pm

using the cross reference component seems to create duplication of lines: 324 points shall create 105,300 lines, but the result is different

Permalink Reply by Daniel Piker on October 9, 2016 at 3:13am

I've just read through this whole discussion and either I'm missing something, or this is all being made a lot more complicated than it needs to be!

Just use  the cross reference component as above, but set to 'Lower triangular (strict)'. That's all you need.

The 'interconnect points' in Kangaroo was added before this option on cross reference was available - it is just doing the same thing and is redundant now. Also, the code inside it is essentially the same 2 lines as Tom posted below.

and here's an ancient post with some images of data matching options:

http://www.grasshopper3d.com/xn/detail/2985220:Comment:50861

Permalink Reply by Grasshope on October 9, 2016 at 3:28am

Thank you, Daniel!

I revised the workflow as suggested (see GH file attached).

It seems the Kangaroo component is the fastest (< 10ms), considering the overall time used for all steps for each approach. I wonder what is causing the performance difference between Tom's script and the Kangaroo component if they use the same code.

Attachments:

• draw lines btw pts _v008.gh, 17 KB

Permalink Reply by Hyungsoo Kim on October 5, 2016 at 12:14pm

Like this?

Attachments:

• Interconnectpoints_re.gh, 7 KB

Permalink Reply by Hyungsoo Kim on October 5, 2016 at 12:29pm

By Using Kangaroo's "Interconnectlines",  you can remove "0" length lines.

Permalink Reply by Grasshope on October 5, 2016 at 12:34pm

thank you very much, Hyungsoon, for your great suggestion!

Permalink Reply by Grasshope on October 5, 2016 at 12:39pm

thanks, Kim. but it seems some of the lines between point pairs are missing.

Appreciate if you can kindly advise!

Attachments:

• test.gh, 5 KB

Permalink Reply by Grasshope on October 5, 2016 at 12:43pm

also, the 3 points there should be only 3 lines between them:

hope you can kindly advise how to delete the duplicates.

Thanks!

Permalink Reply by Hyungsoo Kim on October 5, 2016 at 12:53pm

Already mentioned, there are "0" length lines which you cannot see.

Permalink Reply by Grasshope on October 5, 2016 at 12:59pm

Thanks, Kim. I'm unable to find the interconnectlines component after installing Kagaroo.

Plus, what I mean is that there are lines missing as shown by the color lines below:

Permalink Reply by Hyungsoo Kim on October 5, 2016 at 1:10pm

Or, you can use "Cross Reference" with "coincident"

And you should install Kangaroo V-0.099

Attachments:

• Interconnectpoints_reV2.gh, 7 KB

Permalink Reply by Grasshope on October 5, 2016 at 1:25pm

Thanks! I'll search Kangaroo v0.099.

For the above workflow, there are still missing lines between points:

Attachments:

• Interconnectpoints_reV3.gh, 9 KB

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