seedstone

Render a 3D rotating gemstone from any string. The same string always produces the exact same gem.

Every trait — colour, cut, refraction, iridescence, imperfections — is derived deterministically from the seed, making seedstone a drop-in visual identity for usernames, hashes, or UUIDs.

Quick start

import { SeedstoneRenderer } from "seedstone";

new SeedstoneRenderer("alice", {
  container: document.getElementById("gem")!,
});

Script tag — include dist/seedstone.standalone.js, then use window.Seedstone.SeedstoneRenderer.

Overrides

Pass a config tree to pin or re-randomise any trait. SeedstoneConfigOverrides is a deep-partial of the trait tree: a plain number/string pins a value for every seed, while seeded() flips a value to seed-generated instead.

import { SeedstoneRenderer, seeded, type SeedstoneConfigOverrides } from "seedstone";

const config: SeedstoneConfigOverrides = {
  gem: {
    cut: "spinel", // pin every gem to the spinel cut
    bodyLightness: seeded(), // make the body lightness vary by seed
    distortion: { perfection: 1 }, // pin to fully flawless
  },
};

new SeedstoneRenderer("alice", {
  container: document.getElementById("gem")!,
  config,
});

All tunable traits live in src/config.ts.

Live updates

update(seed) swaps to a new seed and setConfig(overrides) re-applies overrides — both reconcile the existing instance in place, so they're cheap enough to call on every keystroke. Read back the fully-resolved values for the current seed from gem.config (a SeedstoneConfig).

import { SeedstoneRenderer, type SeedstoneConfig } from "seedstone";

const gem = new SeedstoneRenderer("alice", {
  container: document.getElementById("gem")!,
});

input.addEventListener("input", () => gem.update(input.value)); // new seed, same instance

gem.setConfig({ gem: { cut: "garnet", hue: 200 } }); // pin traits live
gem.setConfig({}); // clear overrides

const resolved: SeedstoneConfig = gem.config; // every trait, resolved for this seed
console.log(resolved.gem.hue, resolved.gem.speed);

API stability

The core API — SeedstoneRenderer, seeded(), and the SeedstoneConfig / SeedstoneConfigOverrides types — follows semver and stays stable across a major version.

The advanced exports for schema introspection (configSchema, mergeSchema, resolveConfig, isScalarParam, isChoiceParam, and the ScalarParam / ChoiceParam / SeedstoneSchema types) exist for building a UI against the raw schema. They may change in any minor release — only depend on them if you pin the version.

Development

# one-time setup
npm install && npm install --prefix website

npm run dev    # watches the library and serves the website simultaneously
npm run build  # production bundle into dist/
npm test       # build + run test suite

License

MIT