polygonTangents

描述

¥Description

Finds the tangents of a (多个)多边形 from a 点.

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

参数

¥Parameters

名称	类型	描述
pt	坐标系	to calculate the tangent points from
polygon	特性<多边形 | MultiPolygon>	获取切线来自

返回

¥Returns

FeatureCollection<点> Feature Collection containing the two tangent points

¥FeatureCollection<Point> Feature Collection containing the two tangent points

示例

¥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);

安装

¥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(...);