import type { Surface } from '../types.js';
export interface SnowPoint {
    x: number;
    depth: number;
    base: number;
}
export interface SnowContour {
    points: SnowPoint[];
    peak: number;
}
/** Trace the collision profile itself. Empty gaps stay empty; no decorative height is invented. */
export declare function buildSnowContours(surface: Surface): SnowContour[];
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