Hi everyone, As I am new to Grasshopper, I am not sure how to exclude the lines inside my core wall region. I have tried to use the cull function, but it seems like the lines are following the grid, which has no physical points inside the wall region. May I know whether anyone has any thoughts on i…

Hi, Your grid-like structure is currently represented by rows/columns of points in a data tree. Each tree branch represents one row or column, depending how you look at it. [Screenshot 2026-02-06 at 07.42.41] Downstream this leads to a confusion, when you cull the points inside the extrude regi…

dear Larkin, would love to help yout. but your file is loaded with plugins. I don’t know them and do not want to install them. So please isolate the issue by internalising the input into the area and upload that without plugins. If the plugins are essential to your question, please mention them, s…

Thank you Eef Weenink. The plugins are essential to the script because the beam positioning is based on the grid. The plugins I used are ggETABS (for the structural analysis) and Bullant (member shape).

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OK, then please change the categories of this (your) thread in the forum, so people know. + I agree with @Quan_Li → Your .gh look likes spaghetti going al over the place. Best is to isolate the region where your problem lays and you are working. Group components in functions and some labels to t…

Then internalize the relevant data. If your question is about culling lines inside a boundary - then just provide the lines and the boundary.

Thanks, everyone, for the advice. I will attach where the main problem is, with another script provided below. Question on beam positioning_05_2_2026.gh (46.3 KB) The image below, shows where i would like to erase (the red lines inside the orange square) [Screenshot 2026-02-05 093457] Thank yo…

The part here is about the grid system, so the main problem is where the far right-hand side has a red group box, and is named beam positioning.

Can’t even see a grid when I open your file. [BG]

As I mentioned, the grid system is using the plugin, ggETABS, so that’s why there is nothing showing in your version.

Internalise the output from that plugin. [Rhino_Fk4PNogLRb]

Anyone knows about how to cull the lines inside a boundary?

Grasshopper

Quan_Li (Quan Li) February 5, 2026, 2:36am 4

Help Us Help You - Grasshopper - McNeel Forum

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Anyone knows about how to cull the lines inside a boundary?

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