I have mainly improved the neighbors indices cache, and now we also provide a no-cache policy that could save memory footprint
Hi @benbovy , could you please have a look at fastscape-lem/fastscapelib#62 ? It is a big one, and it's preferable to review and merge it before working on flow routing API. Thanks!
One thing that I'll try is to refactor the
fill_sinks functions in sinks.hpp so that those are grid agnostic.
I'm starting to implement the
flow_graphe API!
do you remember why ? is it related to capability to load a computation from a config file, or from the python side?
We should be able to set those parameters from Python, so I think we need to provide instances of those subclasses when creating an instance of
flow_graph.
:+1:
Added support for log scales as well
although changing from linear to log or from log to linear seems to be broken on the shaders
@benbovy I thought you'd find this cool https://twitter.com/BarrettMeeker/status/1353123863257735168?s=20 https://twitter.com/BarrettMeeker/status/1350208383060643841?s=20
the simulation (and rendering) is made entirely in OpenGL shaders, on a 1000x1000 grid
I'd love to see something like that to simulate mountain formation (with some realistic textures representing vegetation levels, snow, etc.)
That would be super cool indeed
Given the text on the tweet. I understand they have a heightmap for the sand (each "pixel" of the grid has a given sand height). And they compute the height of each pixel given the wind, the previous state, and the neighborpixels. I wonder how accurate their simulation is. But it looks correct at least :)
Regarding the formation of mountains, I've been working with someone (Guillaume Cordonnier) who is developing very fast algorithms and scientifically quasi-accurate for such kind of application (e.g., https://team.inria.fr/imagine/sculpting-mountains-interactive-terrain-modeling-based-on-subsurface-geology/)
(I don't have a link to an animating landscape, unfortunately)
It might be possible to implement this in shaders and get a very fast implementation of this :)
I'm thinking right now about a terrain texture component for ipygany :-). Something like described here: http://unitytipsandtricks.blogspot.com/2014/07/terrain-texture-splatting-and-threejs.html. One could pick a few built-in textures (or load custom textures) and with some parameters tweak texture splatting.