I needed a quick way to sketch out alternate paths between points while taking max slope into consideration. I found an existing definition that uses surfaces, but since I have a very detailed mesh I did some modifications to make it work. Instead of using a geometry intersect between the surface and a lofted radius to find a path forward I used a circle divided into points that I then projected down onto the mesh.
I am new to Grasshopper and it would be a lot better if you read the original post and definition. For the same reason I cannot guarantee that the definition is formatted very well.... ;-)
Please let me know if you find errors in how the slope evaluation is done, I use this at work for sketching in early stages of city planning.
The original definition was made by Joseph Claghorn and can be found at https://generativelandscapes.wordpress.com/2015/02/17/path-finder-using-a-recursive-process-example-8-5/
It was made using Rhino Version 6 SR22 (6.22.20028.13281, 01/28/2020) and Anemone
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