TWO WORLDS, ONE LAW · DEFAULT SEED k2v-1 k2em — k·2^v − 1
A world you can ask for by its address.
Every tile, every house, every tree here is a function of a seed and a coordinate. Nothing is stored; nothing is downloaded. Zoom in and the detail is computed for the place you are looking at, then forgotten. The same arithmetic runs in the browser and in Python, and agrees to twelve decimal places.
1024 × 512 TILES · 16 KM AROUND · AN HOUR ON FOOT
The Atlas
A small planet wrapped from a 1024 × 512 window of ned.World. Fly the globe like an earth browser, dive to block scale, land, and walk among the cottages and trees the orbit showed you. Try the Ranges & rivers recipe and compare it with the original at the same coordinate.
6,371 KM RADIUS · METRE SAMPLING · SIX FACES
Planet One
Earth-scale. A cube-sphere quadtree streams terrain from orbit to your feet, and the mountains sit on the address: a ridge stands where the cell index is k·2^v − 1, which is where the quadtree has an edge. Rivers, farmsteads and woods, all from the same rule. Choose a landing and walk.
RIVERS · ALMANAC · EDGE LAW · PYTHON + JAVASCRIPT
The library
The mathematics underneath both worlds: Lars Rocha's RangeBlends indexed primitives — the ruler sequence, cumulative runs, indexed noise, a river network walked from its mouth — as one dependency-free package with the same API in two languages.
Open the library demo →Want the mathematics and the calls behind these? Read how a coordinate becomes a world → — the primitives, a quick start in both languages, how each demo is built, and how to write a terrain law of your own.
Indexed, not simulated
Ask for tile (511, 127) of seed k2v-1 k2em and you get the same cottage every time, in any language, on any machine — without anyone having generated the tiles around it. A deeper zoom is a longer index, not a bigger download.
Versioned laws
Each terrain recipe is a named version (planet-v1, planet-v3, the Atlas's ranges). Changing a law means a new name, never a silent change to an old world.
Honest about scope
These are fictional worlds, not Earth. There is no climate model, no saved game, no global map in memory. Planet One needs WebGL; the Atlas has a software fallback.