Drainage Direction Script

I made a python script that estimates the direction of drainage paths on a surface.

It does not deal with puddling or accumulation, and if you have any suggestions on how to make it faster or to improve it in any way, let me know -- this is a first draft.

you can see the python code in this github gist:

https://gist.github.com/1054969

Attachments:

drainScript.ghx, 218 KB

Replies to This Discussion

Permalink Reply by Chris Ingram on February 19, 2013 at 10:25am

Daniel,

many thanks. I didnt realise that the pull to mesh component had the same/similar functionality and overlooked it first time round.

I did get some great results from kangaroo so thanks. I had been speaking with my tutors (DS10 at westminster) who had suggested the scripted approach may provide a way to achieve denser results, but i did manage to get the following from kangaroo after my initial forum response on this thread. I will have a go with the pull to mesh approach and really appreciate kangaroos functionality! Thanks for your input! :)

Regards,

Chris

Permalink Reply by doolittles on April 8, 2019 at 2:40am

Hi Chris,

just wondering how did you create that image above? I suppose those are all the water lines generated?

Permalink Reply by Vincent Aldana on April 16, 2016 at 6:06pm

What is the T in your grasshopper component?

Permalink Reply by doolittles on April 8, 2019 at 2:41am

Hi Neil,

do you mind sharing the script that you used?

many thanks

Permalink Reply by Juli Bent on May 24, 2017 at 6:14am

Hello everyone,

I am a total beginner with Python, Rhino and Grasshopper, but I need to model the drainage paths on a surface.

I imported a .jpg file into grasshopper and created a Surface from Points. Now I tried to use your python script to model the drainage.

When running the script it appears the Runtime error 'terrain surface' is not defined.

But to be honest I am not sure if I even did connect the Python component correctly with my surface and further on then imported the surface correctly into the skript.

As I said, I am a total beginner and I would really appreciate any help.

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