Created a list of vectors in python

Grasshopper
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1

Hey,

I currently need help with Python.
I created a pointcloud in Rhino and transfered it into Grasshopper. I searched for every point in the pointcloud the nearest points. I wrote a script in Python to calculate some vectors from this point to every nearest points.

I saved the results in a list of strings.
Now I want to calculate the cross product from two vectors which are next to each others.
But I can’t access the list.
How can I save the results in a list of vectors so that I can use it for my next steps.

And its my first time that I use Python, so how can I define a function to calculate the cross product from a list of vectors.

The following picture shows my script. x is a list of points, y a tree where the branch contains the information of the nearest points, u is the number of the points, and z includes the number of nearest points.

IMG-20240114-WA0014
IMG-20240114-WA0014517×659 57.7 KB

IMG-20240114-WA0013
IMG-20240114-WA00131600×517 163 KB

2

There’s a lot going on there that would be easier to understand with the Grasshopper file (preferably using a GHPython component, as most people probably aren’t using Rhino 8 yet).

But this part at least can be solved using Vector3d.CrossProduct.

3

here is the Grasshopper file and the associated file with the geometry from Rhino

zylinder 2.gh (40.5 KB)
rhino Zylinder.3dm (1.6 MB)