Rivers using Heirarchical Poisson Disc and Delaunay Triangulation

[Hai-Etlik]

Very interesting! For just (semi-)randomly picking directions, this generates some nice results. I am also watching this thread to see how far you can take this!



I would hesitantly disagree, and say that your hydrological divides could be an abstraction of elevation data (ridge lines?). I am now wondering if there is some way of processing elevation data so that this can read it as just a set of ridge lines/break lines/divides.

The ridgelines are certainly meant to represent topography in a highly abstract way, as are some of the selection weightings. I'd hesitate to use the term "elevation" though. In geography "elevation" is specifically the distance between the ground surface and the datum (essentially "sea level" in non-geography speak). There's no vertical distance quantity anywhere in my algorithm which is why I say it has no concept of elevation.

[Hai-Etlik]

The precipitation is now a raster file rather than a perlin noise generator. So the collecive inputs to the algorithm look like this


And the output looks like this