fill method
Implementation
@override
OpSet fill(List<PointD> points) {
final FillerConfig dotConfig = _config!.copyWith(
drawConfig:
_config!.drawConfig!.copyWith(curveStepCount: 4, roughness: 1),
hachureAngle: 1,
);
final List<Line> lines = buildFillLines(points, dotConfig);
return dotsOnLines(lines, dotConfig);
}