polygonTangents

描述

🌐 Description

从点寻找(多)边形的切线。

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

参数

🌐 Parameters

名称	类型	描述
pt	坐标	用于计算切点
polygon	要素<多边形 | 多多边形>	用于获取切线

返回

🌐 Returns

FeatureCollection<Point> 包含两个切点的要素集合

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(...);