image-js/src/draw/utils/deleteDuplicates.ts

Image processing and manipulation in JavaScript

import type { Point } from '../../utils/geometry/points.js';

/**
 * Remove duplicate points from array.
 * @param points - Polygon points array.
 * @returns Cleaned polygon points array.
 */
export function deleteDuplicates(points: Point[]): Point[] {
  const finalPoints: Point[] = [];
  for (let i = 0; i < points.length; i++) {
    if (
      points[i].column === points[(i + 1) % points.length].column &&
      points[i].row === points[(i + 1) % points.length].row
    ) {
      continue;
    } else {
      finalPoints.push(points[i]);
    }
  }
  return finalPoints;
}