hash2(x: number, y: number) → number

Deterministic value noise. The same field the basalt shader uses at a different scale, so the modelled relief and the shaded relief agree.

vnoise(x: number, y: number) → number

fbm(x: number, y: number, octaves: number) → number

builder( ) → Builder

vert(b: Builder, x: number, y: number, z: number, u: number, v: number) → number

tri(b: Builder, a: number, c: number, d: number) → void

quad(b: Builder, v00: number, v01: number, v10: number, v11: number) → void

finish(b: Builder, flatShade: boolean?) → any

Accumulate face normals onto the vertices, then normalize. A mesh built by any of the builders below gets its normals from its own triangles, so a displaced grid and an extruded profile shade the same way.

faceZ(x: number, y: number) → number

One displaced grid. Relief is fbm plus vertical column grooves; the sides curve hard away from the camera so the cliff never shows its edge, and the top row breaks into a jagged skyline at the summit. The depth of the face at a point. Public because the shelves and the props tuck themselves into whatever it turns out to be. Columnar basalt is not a grooved wall — it is a palisade of prisms. Each column stands at its own depth with FLAT sides and a hard seam against its neighbour, and cross-joints break every column into stacked blocks. So the depth is piecewise constant per (column, block) rather than a smooth field, and the mesh grid resolves each seam as a real facet edge that catches the raking moonlight.

face(opts: any) → any

grid(opts: any) → any

A flat grid in the XZ plane, for a surface whose shape comes from its shader's own vertex stage rather than from the mesh.

ridge(opts: any) → any

A wall whose TOP EDGE is a ridgeline: the headland further along the coast, standing behind the climbed face. It is what stops sky appearing beside the cliff on a wide screen, and it gives the fog something to sit in front of.

crestAt(x: number) → number

shelf(opts: any) → any

Extrude a six-point profile — back of the top, the crown, the front edge, the lip's face, the undercut, the back of the bottom — along x, with the front edge and the top wandering per column. Local origin sits at the point CF.landing tests: x at the ledge's centre, y at its top surface, z at 0.

sphere(rings: number, segs: number, jitter: number?, seed: number?) → any

cone(segs: number, seed: number?) → any

petal( ) → any

A petal of the crowfoot blossom: a cupped leaf lying in the XZ plane, its base at the origin and its tip at +z, so an entity rotating about X opens it.

chunk(seed: number) → any

An irregular rock chip, for the debris a crumbling ledge throws and for the boulders on the strand.

stick(seed: number) → any

A weathered stick, for the nest on the roost.