Tree branches in Join

Grasshopper
,
1

Hi,
New to Grasshopper, so this is probably a very basic question.
I’m trying to join sides of a square with its diagonals like this:

desired_join
desired_join989×1010 41.7 KB

However, I can’t correctly align the two trees of curves for the join function.
grh
grh977×352 34.1 KB

Join_Test.gh (10.3 KB)
I would like to get the diagonal to join with each of the two curve fragments resulting from Shatter.
What am I getting wrong?

2

Your approach is a bit complicated… I attached a file with two options

image
image1925×519 96 KB

Join_Test.gh (16.7 KB)

3

Thank you very much for the solution!
However, I was looking to extend this to a polygon where I am measuring all areas cut off by all chords between all vertices.
So I introduced a series to define the shift, but then the branches are off again:
Join_Test3.gh (12.0 KB)

4

Chords from each vertice to all other vertices?

or

Chords in between end points of two consecutive, joined edge segments?

5

Chords from each vertex to every other vertex.
To be joined with all the edges “subtended” by the chord.

6

I think a sketch of the desired result would be useful

7

Here is a sketch of areas I’m looking for (here for a single vertex, I’m looking to shoot chords from every vertex). Chord shown in yellow. The two areas resulting from a split shown in green and red.

Area_Chord_Polygon_Intersections
Area_Chord_Polygon_Intersections1288×775 69.2 KB

(I am going to later use the area of the intersection as a convexity/concavity measure to use for fitting a plane.)

8

Intersection between what?

9

Intersection between the chord and the polygon. Area is the area clipped by the chord.

10

That’s what the image above shows

Join_Test4.gh (14.2 KB)

12

Wow, thanks so much, this is amazing!
Really appreciate your help and patience.

1 Like