rng(seed: number) → void

A deterministic little generator, so the same seed always shapes the same chunk and a rebuilt Crown is the Crown that was there before.

smoothNormals(positions: { number }, indices: { number }) → void

Two normal policies. Smooth accumulates face normals per vertex, which is what a cloud wall wants (the fresnel rim needs a continuous normal). Flat un-welds every triangle onto its own face normal, which is what a rock wants — the facets are the read.

facet(positions: { number }, uvs: { number }, indices: { number }) → void

Split every triangle onto its own three vertices so each face carries one normal. Returns a fresh geometry.

twoSided(geom: ?) → void

Append a mirrored copy of every triangle so a single-thickness surface reads from both sides even where the pipeline culls.

upload(geom: ?) → void

shell(opts: ?) → void

A lofted ring of revolution with a scalloped, twisting radius — the eyewall itself, the inner veil, and the anvil cap over the top are all this builder with a different profile. opts.segments vertices around the ring (default 84) opts.rows rows up the profile (default 18) opts.profile function(v) -> radius, y — v runs 0 (throat) → 1 (top) opts.lobes how many scallops around the wall opts.scallop how deep they cut, as a fraction of radius opts.twist how far the scallops rotate between throat and top opts.wobble a second, finer ripple

vane(opts: ?) → void

One blade of the rotation: a ribbon that leaves the wall, curls inward, and falls. Built as a swept strip so it has a real silhouette from the side and narrows to a point at the tip. opts.length how far it reaches (default 7) opts.width chord at the root opts.curl how far it wraps around the axis over its length, radians opts.drop how far it falls over its length opts.steps tessellation along the blade

rock(seed: number, radius: number, jitter: number?) → void

An irregular faceted chunk: an octahedron subdivided twice, every vertex pushed out to a jittered radius, then flat-shaded so the facets read. `seed` makes each chunk its own shape, so a field of debris is not a field of one object repeated.

mid(a: number, b: number) → number

spire(radius: number, spikes: number, spikeLen: number) → void

The thing in the eye. A faceted body with spikes pushed out along alternate meridians — close to a rock in construction, deliberately not a sphere, so the core has a silhouette of its own when the wall thins out around it.