How to display shade points on the footway？

Grasshopper
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1

Hello all.
I’m new to Rhino and there are a lot of things I don’t understand.
I created multiple points on a 3D model of a footway in Rhino using [Populate Geometry]. (Ideally, I would like to display points at 1-meter intervals along the footway, but I’m not sure how to do that.)

Next, I want to change the color of the points where the shadow of the building’s 3D model (mesh) falls, based on the solar vector information obtained from an epw file.

Ultimately, my goal is to convert the coordinates of the points in the shaded area to latitude and longitude and export them as a CSV file.

I was able to generate multiple points on the footway, but I can’t figure out how to change the color of the points in the shadow. Also, if possible, I would like to display points at 1-meter intervals along the footway.

I would appreciate any advice you can offer x(

スクリーンショット 2024-10-09 222331
スクリーンショット 2024-10-09 2223312358×1035 455 KB

2

Hi -

  1. Screenshots can help but you always need to post a .gh file with internalized geometry
  2. From the looks of it, users will need to have the Ladybug Tools plug-in installed. You’ll probably want to ask this question in the dedicated forum: https://discourse.ladybug.tools/

-wim

3

Shadow study like this is a very typical use case for Ladybug tools.
If you are struggling with setting up such analysis, it’s always good to check for references available on Hydra, an online repository of Ladybug example files.

I think to your case the Shadow Range example file should cover you.

Just provide your footway surface as _geometry and set the _gridsize to 1 to achieve that “1 meter interval” test point distribution.

4

Also, for previewing the coloured points, you can use the Dot Display component.