Select Lines by chosing start Z height AND end Z height

[r_enforce (Timos K)]

Hello, is it possible to help me by showing me a way in order to select random lines that have specific start Z and end Z values ?

A relevant post is this one, but I dont know to separate start and end points, and select lines only with BOTH start Z and end X specific values.

How to select only lines with start points at z = 0?

Hi there, I am trying to get only the lines that have starting point with z value 0, but i cant find any API references of the class Line or curve with their properties to code this. Is there a way to only select those lines that have a starting point z =0 with or without code? Or is there a API reference that i can use where all the properties are shown? I uploaded a example file that I tried to use for this test. Regards, Giorgio SelectLines with start points 0.gh (9.0 KB)

Thank you

[martinsiegrist]

If you want to filter all horizontal lines, you can calculate the dot product of the lines and a Z vector. The dot product of a horizontal line is 0, as is the cosine of the angle.

[r_enforce (Timos K)]

If need to get specific horizontal lines in a certain Z , not all of them, they way you are proposing, I can’t separate them.
By chosing start Z and end Z I think is a good way. No ?

By selecting start Z and end Z someone can get all kind of lines, not only the horizontal ones.