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Version: 7.3.0

planepoint

描述​

🌐 Description

以三角形平面作为多边形，并在该三角形内取一个点，返回该点的 z 值。

🌐 Takes a triangular plane as a polygon and a point within that triangle, and returns the z-value at that point.

多边形应具有属性 a、b 和 c，用于定义其三个角的值。或者，如果这些值未作为属性提供，可以通过各自的第3个坐标提供每个三角形点的 z 值。

🌐 The Polygon should have properties a, b, and c that define the values at its three corners. Alternatively, the z-values of each triangle point can be provided by their respective 3rd coordinate if their values are not provided as properties.

参数​

🌐 Parameters

名称类型描述
pointCoord将要计算 z 值的点
triangleFeature<Polygon>具有三个顶点的多边形要素

返回​

🌐 Returns

number interpolatedPoint 的 z 值

示例​

🌐 Examples

const point = turf.point([-75.3221, 39.529]);
// "a", "b", and "c" values represent the values of the coordinates in order.
const triangle = turf.polygon(
  [
    [
      [-75.1221, 39.57],
      [-75.58, 39.18],
      [-75.97, 39.86],
      [-75.1221, 39.57],
    ],
  ],
  {
    a: 11,
    b: 122,
    c: 44,
  },
);

const zValue = turf.planepoint(point, triangle);
point.properties.zValue = zValue;

安装​

🌐 Installation

$ npm install @turf/planepoint

import { planepoint } from "@turf/planepoint";
const result = planepoint(...);
$ npm install @turf/turf

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