import { HachureFiller } from './hachure-filler';
import { polygonHachureLines } from './scan-line-hachure';
import { lineLength } from '../geometry';
export class ZigZagFiller extends HachureFiller {
    fillPolygons(polygonList, o) {
        let gap = o.hachureGap;
        if (gap < 0) {
            gap = o.strokeWidth * 4;
        }
        gap = Math.max(gap, 0.1);
        const o2 = Object.assign({}, o, { hachureGap: gap });
        const lines = polygonHachureLines(polygonList, o2);
        const zigZagAngle = (Math.PI / 180) * o.hachureAngle;
        const zigzagLines = [];
        const dgx = gap * 0.5 * Math.cos(zigZagAngle);
        const dgy = gap * 0.5 * Math.sin(zigZagAngle);
        for (const [p1, p2] of lines) {
            if (lineLength([p1, p2])) {
                zigzagLines.push([
                    [p1[0] - dgx, p1[1] + dgy],
                    [...p2],
                ], [
                    [p1[0] + dgx, p1[1] - dgy],
                    [...p2],
                ]);
            }
        }
        const ops = this.renderLines(zigzagLines, o);
        return { type: 'fillSketch', ops };
    }
}