/**
 * Mesh format compatible with deck.gl SimpleMeshLayer.
 * All geometries are Z-up (deck.gl convention), unit scale (0..1 in Z = bottom to top).
 */
export type TreeMesh = {
    attributes: {
        POSITION: {
            value: Float32Array;
            size: 3;
        };
        NORMAL: {
            value: Float32Array;
            size: 3;
        };
    };
    indices: {
        value: Uint32Array;
        size: 1;
    };
    topology: 'triangle-list';
    mode: 4;
};
/**
 * Unit trunk cylinder mesh: from z=0 (base) to z=1 (top), radius tapers from 1 to 0.7.
 * Scale via `getScale = [trunkRadius, trunkRadius, trunkHeight]`.
 */
export declare function createTrunkMesh(segments?: number): TreeMesh;
/**
 * Unit palm trunk mesh with a slender taper and raised leaf-scar rings.
 * Extends from z=0 (base) to z=1 (top).
 *
 * The shared trunk accessor still controls the overall radius and height. The
 * extra geometry is generated once and instanced for every palm.
 */
export declare function createDatePalmTrunkMesh(segments?: number, scarRings?: number): TreeMesh;
/**
 * Unit pine canopy mesh: multiple tiered cones creating a Christmas tree silhouette.
 * Extends from z=0 (base of canopy) to z=1 (tip).
 *
 * @param levels - number of cone tiers (1-5)
 * @param segments - polygon segments per cone
 */
export declare function createPineCanopyMesh(levels?: number, segments?: number): TreeMesh;
/**
 * Unit oak canopy mesh: high-segment sphere, smooth pole, no shading stripe.
 *
 * IcosahedronGeometry (detail ≥ 1) always creates a single vertex at the
 * sphere's north pole via subdivision (normalized midpoint of the top edge),
 * giving 5 triangles meeting at the apex — the visible spike. Rotating the
 * icosahedron only moves WHICH original vertex becomes the apex; all 12 base
 * vertices are 5-connected, so the artifact persists.
 *
 * SphereGeometry(24, 16) places 24 tiny triangles at the pole instead of 5,
 * which is invisible at normal viewing distances. The earlier "shading stripe"
 * with the low-poly sphere (12 × 8 = 22.5° bands) was coarse Gouraud banding,
 * not a UV-seam issue. At 24 × 16 (7.5° bands) the shading is smooth.
 * Extends z = 0 (base) to z = 1 (top).
 */
export declare function createOakCanopyMesh(): TreeMesh;
/**
 * Unit palm crown with radial, arching fronds and paired pinnate leaflets.
 * Extends approximately one unit in XY and from z=0.1 to z=1.
 *
 * Fronds are intentionally modeled as real mesh ribbons instead of a solid
 * canopy blob. This preserves the characteristic feathered silhouette from
 * both aerial and pitched map views while remaining one shared instanced mesh.
 */
export declare function createPalmCanopyMesh(): TreeMesh;
/**
 * Unit birch canopy mesh: a narrow oval / diamond shape.
 * Extends from z=0 to z=1, narrower than an oak.
 */
export declare function createBirchCanopyMesh(): TreeMesh;
/**
 * Unit cherry canopy mesh: a full, round sphere slightly larger than oak.
 * Extends from z=0 to z=1.1 (slightly wider than tall for a lush look).
 */
export declare function createCherryCanopyMesh(): TreeMesh;
/**
 * Unit crop sphere mesh for rendering individual fruits, nuts, or flowers.
 * Deliberately low-polygon (24 triangles) so hundreds of instances remain cheap.
 * Scale uniformly via getScale = [r, r, r] to set the world-space radius in metres.
 */
export declare function createCropMesh(): TreeMesh;
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