Comparing two list of lines and only removing the duplicate in the first list?

I have this as an example:

1. LIST A: list with 200 lines "base" list

2. LIST B: list with 100 lines, 50 of the lines overlap with LIST A, the others don't

I'm trying to clean up LIST B so that it only has unique lines and remove all the other lines that overlap with LIST A (so I end up with 50 unique lines)

Is there a way to achieve this? Thank you very much!!

Replies to This Discussion

Permalink Reply by ng5 Alex on June 29, 2014 at 6:52pm

Hello

you try this using the remove duplicate lines (only lines not curves) component found in kangaroo plugin

http://www.grasshopper3d.com/group/kangaroo

cheers

alex

Permalink Reply by ng5 Alex on June 29, 2014 at 7:19pm

ah was to quick to answer. with the partition list doesn't work obviously

this one does

cheers

alex

Permalink Reply by ng5 Alex on June 29, 2014 at 7:26pm

remove duplicate lines keeps data structure so list A output from split list component is the list you inputed first to the remove duplicate lines component.

Permalink Reply by Kevin Yen-Po Chen on June 29, 2014 at 9:07pm

Hiya ng5,

thanks for your reply! however, with your solution, the list is structured to remove duplicate lines in either list A or list B, and sometimes the line in "LIST A" is removed as the duplicate, so not all duplicate lines are removed in "LIST B". I want to remove all the duplicate/overlapping lines in "LIST B" by screening with "LIST A"?

Permalink Reply by ng5 Alex on June 29, 2014 at 9:38pm

hello again

without a definition i cant tell what happening, so i cant help you. please upload a definition to see whats happening.

Permalink Reply by Kevin Yen-Po Chen on June 29, 2014 at 10:19pm

Hi there! Please see attached.

Basically I want to extract little connections between the thickness of the mesh so that I can use them for inflation ties. So I want to only have lines in between the mesh, but not on the mesh itself. So far using something similar to this method I am only able to remove some duplicate lines, but like I said in the previous reply, sometimes the duplicate lines command doesn't remove all the lines because it is actually removing the lines from the original list I compare it to.

Attachments:

MeshConnection.3dm, 217 KB
MeshConnection.gh, 9 KB

Permalink Reply by ng5 Alex on June 29, 2014 at 10:59pm

hello

i don't have karamba installed, that's why i suggested the kangaroo remove duplicate lines.

check file, it does what you are after, removes the duplicates.

ps.i cant tell for sure what is wrong with your definition, because i don't have karamba, but i do not understand what you were testing against, with larger than, with the list length as input.

Attachments: