Parametric list, element by element

Hello everyone,

I’m quite new to grashopper hence I am not sure if my idea is feasible.

I am working on rather complex geometry which involves a step where a list of numerical values is computed for further use. Important - the number of values in the data series is not constant and in principle can vary.

What I would like to be able to do is manipulate selected data in the list and be able to do it in a dynamic manner to preview how the final geometry changes. Below I show an example:

Point no 2 and no 4 from the list need to be changed so I multiply them by a certain factor.

The reason for this is that the data series is based on a mathematical expression which in some cases gives non physical results that need to be corrected by hand.

Is there a plugin or perhaps build in component which would allow me to do this?

Regards,
Kris

if you want modify a value you can select item by index ,change it than replace it
that what i understand from your image

Using gene pool could be a clean solution

@seghierkhaled

This will not work for me because the index of the item to replace is not constant and it could be 2 or 3 items that I want to change not just one. also the list may at one time contain 10 elements and in some other case 20

@tim.stark

Gene pool does not accept input data. The “initial data” in my screenshot is obtained from previous manipulations on existing geometry. I would like to be able to inspect it, and modify before feeding into the next component.


What I would like to do is something in the manner shown in this old scrip I found by googling.

So to have a series of sliders from 0 to say 2, each of which remaps a single entity in my list. The problem here is that the list count is not constant …
tube_Graft_Bang.ghx (262.9 KB)

use replace items; you already know the index so it’s easy to replace them

@seghierkhaled

Thnaks , that could work but I came up with a “more automatic” solution using bumblebee and excel.

Perhaps someone can use in the future …

param_list_test.7z (36.0 KB)

Simple that’s what I meant. There are some scripts around which updates the gene pool so you can do it easily with various list sizes.
Edit: should repliy to @kma.s

1 Like

Wow Tim this is exactly what I was looking for.

Thanks a lot!

But he wanted a Multiplier, not replacing with a new value…