@polygonjs/plugin-mapbox/dist/src/core/mapbox/CoordinatesCollection.js

Mapbox plugin for the 3D engine https://polygonjs.com

import { ArrayUtils } from "@polygonjs/polygonjs/dist/src/core/ArrayUtils";
export class CoordinatesCollection {
  constructor(coordinates) {
    this.coordinates = coordinates;
  }
  first() {
    return this.coordinates[0];
  }
  last() {
    return this.coordinates[this.coordinates.length - 1];
  }
  distanceTo(features_coordinates) {
    const d00 = this.first().distanceTo(features_coordinates.first());
    const d01 = this.first().distanceTo(features_coordinates.last());
    const d10 = this.last().distanceTo(features_coordinates.first());
    const d11 = this.last().distanceTo(features_coordinates.last());
    return ArrayUtils.min([d00, d01, d10, d11]);
  }
  next_id(features_coordinates_array) {
    let nearest_id = -1;
    let dist = -1;
    let i = 0;
    for (let features_coordinates of features_coordinates_array) {
      const current_dist = this.distanceTo(features_coordinates);
      if (dist == -1 || current_dist < dist) {
        dist = current_dist;
        nearest_id = i;
      }
      i += 1;
    }
    return nearest_id;
  }
  perimeter() {
    let perimeter = 0;
    let prev_coordinate = this.coordinates[0];
    for (let coordinate of this.coordinates) {
      perimeter += coordinate.distanceTo(prev_coordinate);
      prev_coordinate = coordinate;
    }
    return perimeter;
  }
  static sort(features_coordinates_array) {
    let current_feature = features_coordinates_array.shift();
    const remaining_features = features_coordinates_array;
    const sorted_features = [current_feature];
    while (remaining_features.length > 0) {
      const next_id = current_feature.next_id(remaining_features);
      current_feature = remaining_features.splice(next_id, 1)[0];
      sorted_features.push(current_feature);
    }
    return sorted_features;
  }
}