/**
 * Generate SVG markup for hatch lines clipped to a face polygon.
 *
 * @param {number[]} pts - Flat [x0,y0,x1,y1,...] array of projected face corners
 * @param {HatchOptions} hatch
 * @param {string|null} pathD - Occluded face path data; when non-null, clips to this shape instead of the full quad
 * @param {Object|null} faceStyle - Face style object (used for stroke/strokeWidth defaults)
 * @returns {string} SVG markup: line elements
 */
export function buildHatchSVG(pts: number[], hatch: HatchOptions, pathD: string | null, faceStyle: any | null): string;
export type HatchOptions = {
    /**
     * - Hatch line angle in degrees
     */
    angle?: number;
    /**
     * - Spacing between hatch lines in pixels
     */
    period?: number;
    /**
     * - Hatch line color (defaults to face stroke or "currentColor")
     */
    stroke?: string;
    /**
     * - Hatch line width (defaults to face strokeWidth)
     */
    strokeWidth?: number;
    /**
     * - Hatch line opacity
     */
    opacity?: number;
};