polygonTangents

Description

Finds the tangents of a (Multi)Polygon from a Point.

Parameters

Name	Type	Description
pt	Coord	to calculate the tangent points from
polygon	Feature<Polygon | MultiPolygon>	to get tangents from

Returns

FeatureCollection<Point> Feature Collection containing the two tangent points

Examples

var polygon = turf.polygon([
  [
    [11, 0],
    [22, 4],
    [31, 0],
    [31, 11],
    [21, 15],
    [11, 11],
    [11, 0],
  ],
]);
var point = turf.point([61, 5]);

var tangents = turf.polygonTangents(point, polygon);

Installation

$ npm install @turf/polygon-tangents

import { polygonTangents } from "@turf/polygon-tangents";
const result = polygonTangents(...);

$ npm install @turf/turf

import * as turf from "@turf/turf";
const result = turf.polygonTangents(...);