/**
 * Merged hex-tile geometry — the shared base used by both the raycast
 * proxy mesh (`buildPlanetMesh`) and the interactive hex mesh
 * (`buildInteractiveMesh`). Kept internal to the hex-mesh cluster so
 * external consumers only see the finished meshes.
 */
import * as THREE from 'three';
import type { TerrainLevel } from '../types/terrain.types';
import type { BodySimulation } from '../../sim/BodySimulation';
/** Vertex range in the merged buffer for a single tile. */
export interface TileVertexRange {
    start: number;
    count: number;
}
/** Aggregate returned by {@link buildMergedGeometry} — geometry + hover lookups. */
export interface MergedGeometry {
    geometry: THREE.BufferGeometry;
    faceToTileId: number[];
    tileVertexRange: Map<number, TileVertexRange>;
}
/**
 * Builds the merged hex geometry used by the focused body renderer.
 *
 * Every tile is extruded into a prism (top cap + walls); when the body
 * carries a liquid surface, the walls extend down to the deepest palette
 * band so the shore seals without gap. Vertex buffers (color, roughness,
 * metalness, land-flag, tile center, tile radius) are pre-baked so the
 * downstream shader can read them directly.
 *
 * The output geometry is a single merged `BufferGeometry`; shaders can
 * still index per-tile vertex ranges via the returned `tileVertexRange`
 * map (e.g. to repaint a tile's colour on hover without touching the
 * whole buffer).
 */
export declare function buildMergedGeometry(sim: BodySimulation, levels: TerrainLevel[]): MergedGeometry;
//# sourceMappingURL=hexMergedGeometry.d.ts.map