import type { FinishLine } from './types.js';
/**
 * Determine which side of the finish line a point is on.
 *
 * Uses the cross product of vectors to compute signed distance from
 * the line. The sign indicates which side of the line the point is on.
 *
 * @param finishLine - The finish line definition
 * @param lat - Latitude of the point in decimal degrees
 * @param lng - Longitude of the point in decimal degrees
 * @returns Signed value indicating side of line
 */
export declare function sideOfLine(finishLine: FinishLine, lat: number, lng: number): number;
/**
 * Check if a trajectory segment crosses the finish line.
 *
 * Determines if the line segment from (lat1, lng1) to (lat2, lng2)
 * intersects with the finish line segment from P1 to P2.
 *
 * @param finishLine - The finish line definition
 * @param lat1 - Starting latitude in decimal degrees
 * @param lng1 - Starting longitude in decimal degrees
 * @param lat2 - Ending latitude in decimal degrees
 * @param lng2 - Ending longitude in decimal degrees
 * @returns True if the trajectory crosses the finish line, False otherwise
 */
export declare function crossesLine(finishLine: FinishLine, lat1: number, lng1: number, lat2: number, lng2: number): boolean;
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