Ammo: Watershed Analysis in Revit, Flux and Grasshopper

It’s been a while since my last post for various reasons. The biggest of which is that I’m holding a little session at this years BILT Europe conference about topographies in a Revit/Dynamo environment. In that matter, all spare time goes into preparation for this, so no blogposts then.. It is a quite niche subject, so who knows if anyone shows up for that class at all. Anyway, I will eventually share all the material on this blog as well.
On the matter of topographies, let’s have a look at a subject on which I have pondered for a while: How to create a Watershed Analysis (WSA) in Revit.
So what is a WSA you ask.
Well, given a topography/terrain and some start positions for the water, which way will the water go?
Here is a perspective example:

Now going about this, I’ve tried creating something in Python/Dynamo, but didn’t succeed in that endeavour, unfortunately. Let me know if you do! But after some research(that would be googling..) I found a Grasshopper based version with a VB…
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