Function generate_points

scripts/osrm-runner.js:39–78

(polygon, number, coordinates_number, max_distance)

// Generate random coordinate points within a polygon boundary for route testing
function generate_points(polygon, number, coordinates_number, max_distance) {
  const query_points = [];
  while (query_points.length < number) {
    let points = [];

    while(points.length < coordinates_number) {
      const chunk = turf
        .randomPoint(coordinates_number, { bbox: turf.bbox(polygon)})
        .features
        .map(x => x.geometry.coordinates)
        .filter(pt => turf.booleanPointInPolygon(turf.point(pt), polygon));

      if (max_distance > 0)
      {
        chunk.forEach(pt => {
          if (points.length == 0)
          {
            points.push(pt);
          }
          else
          {
            const distance = turf.distance(pt, points[points.length-1], 'meters');
            if (distance < max_distance)
            {
              points.push(pt);
            }
          }
        });
      }
      else
      {
        points = points.concat(chunk);
      }
    }

    query_points.push(points);
  }

  return query_points;
}

// Convert coordinate points into OSRM API query URLs
function generate_queries(options, query_points) {