import type { SlopeInput, SlopeResult } from './types.js';
/**
 * Convert slope between different units
 *
 * Slope can be expressed as:
 * - Percent: rise/run × 100 (e.g., 10% = 10m rise per 100m run)
 * - Degrees: angle from horizontal (e.g., 45° = 100% slope)
 * - Ratio: 1:N where N is run per 1 unit rise (e.g., 1:10 = 10% slope)
 *
 * @param input - Slope value and its unit
 * @returns Slope in all units
 */
export declare function slope(input: SlopeInput): SlopeResult;
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