@threepipe/plugin-svg-renderer/src/three-mesh-halfedge/operations/addVertex.ts

Plugins for SVG Rendering of 3d objects for Threepipe

/*
 * Author: Axel Antoine
 * mail: ax.antoine@gmail.com
 * website: http://axantoine.com
 * Created on Tue Oct 25 2022
 *
 * Loki, Inria project-team with Université de Lille
 * within the Joint Research Unit UMR 9189 
 * CNRS - Centrale Lille - Université de Lille, CRIStAL
 * https://loki.lille.inria.fr
 *
 * Licence: Licence.md
 */

import { Vector3 } from "three";
import { HalfedgeDS } from "../core/HalfedgeDS";
import { Vertex } from "../core/Vertex";

export function addVertex(
    struct: HalfedgeDS,
    position: Vector3,
    checkDuplicates = false,
    tolerance = 1e-10) {

  // Check if position matches one face vertex and returns it
  if (checkDuplicates) {
    for (const vertex of struct.vertices) {
      if (vertex.matchesPosition(position, tolerance)) {
        return vertex;
      }
    }
  }
  
  const v = new Vertex();
  v.position.copy(position);
  struct.vertices.push(v);
  return v;
}