navmesh/src/math/vector-2.ts

A library for fast pathfinding using navigation meshes in JS

import { Point } from "../common-types";

type PointLike = Vector2 | Point;

/**
 * Stripped down version of Phaser's Vector2 with just the functionality needed for navmeshes.
 *
 * @export
 * @class Vector2
 */
export default class Vector2 {
  public x: number;
  public y: number;

  constructor(x: number = 0, y: number = 0) {
    this.x = x;
    this.y = y;
  }

  public equals(v: PointLike) {
    return this.x === v.x && this.y === v.y;
  }

  public angle(v: PointLike) {
    return Math.atan2(v.y - this.y, v.x - this.x);
  }

  public distance(v: PointLike) {
    const dx = v.x - this.x;
    const dy = v.y - this.y;
    return Math.sqrt(dx * dx + dy * dy);
  }

  public add(v: PointLike) {
    this.x += v.x;
    this.y += v.y;
  }

  public subtract(v: PointLike) {
    this.x -= v.x;
    this.y -= v.y;
  }

  public clone() {
    return new Vector2(this.x, this.y);
  }
}