/**
 * Macro continent mask — additive layer on top of the simplex elevation field
 * that produces discrete landmasses (vs the moiré of micro islands a pure FBM
 * generates on humid worlds).
 *
 * The mask is a 3D voronoi tessellation of the unit sphere. Each cell receives
 * a binary "continent / depression" tag from a sin-free polynomial hash, so the
 * formula is byte-identical between the CPU sampler used by `BodySimulation`
 * and the GLSL replica that lives in `liquidMask.glsl`. Boundaries are softened
 * with a smoothstep on the F2-F1 distance — sharp cliffs would clash with the
 * smooth band quantisation downstream.
 *
 * Pure module — no `three` dependency, safe to import from headless callers.
 */
/**
 * Evaluates the continent mask at a unit-sphere position.
 *
 * The point is scaled into voronoi space (`unit * scale + seedOffset`) and the
 * 3×3×3 neighbourhood is searched for the two closest cells. The tag of the
 * nearest cell decides continent (`+1`) or depression (`-1`); the F2-F1
 * distance softens the boundary so cell walls feel like coastlines rather
 * than tectonic faults.
 *
 * @param unit       Unit-sphere direction `(x, y, z)`. Magnitude must be ~1.
 * @param scale      Voronoi frequency. `1` ≈ 4–8 cells visible from one
 *                   hemisphere; `2` ≈ 12–20 cells; up to `3` for archipelagos.
 * @param seedOffset Per-planet domain offset — see {@link continentSeedFromName}.
 * @returns Mask in `[-1, +1]` ready to be added to a noise sample, scaled by
 *          a caller-supplied amplitude.
 */
export declare function continentMask3D(unit: {
    x: number;
    y: number;
    z: number;
}, scale: number, seedOffset: readonly [number, number, number]): number;
/**
 * Derives a deterministic 3-component seed offset from the body name. The
 * offset shifts the voronoi sampling domain so two bodies with different names
 * grow different continent layouts — same name → same continents.
 *
 * The triplet is also exposed as a `vec3` shader uniform so the GPU mask
 * matches the CPU classification on the liquid boundary.
 */
export declare function continentSeedFromName(name: string): [number, number, number];
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