const Path = require('paper').Path
const Point = require('paper').Point
const Project = require('paper').Project

// the next line produces side effects without which 
// the code will not run, but I'm not sure this is the way to go.
let p = new Project() 

function simplify (points) {
  let pts = []
  for (let point in points) {
    let pt = new Point(point.x, point.y)
    pts.push(pt)
  }
  let path = new Path({
    segments: pts,
    strokeColor: 'black',
    fullySelected: false
  })
  path.simplify(10)

  let simplePath = []
  for (const segment of path.segments) {
    // only one segment reaches this point
    // with all zeros in all the parameters
    console.log(segment.path)
    simplePath.push(
      {
        handleIn: { x: segment.handleIn.x, y: segment.handleIn.y },
        handleOut: { x: segment.handleOut.x, y: segment.handleOut.y },
        point: { x: segment.point.x, y: segment.point.y }
      })
    console.log(`
    hi   : (${segment.handleIn.x}, ${segment.handleIn.y})
    ho   : (${segment.handleOut.x}, ${segment.handleOut.y})
    point: (${segment.point.x}, ${segment.point.y})`)
  }
  return simplePath
}
module.exports = simplify

我认为你的错误是在这里：

for (let point in points) {
    let pt = new Point(point.x, point.y);
    pts.push(pt);
}

如果，因为我认为，变量points包含对象的数组，你应该使用：

for (let point of points) {
    let pt = new Point(point.x, point.y);
    pts.push(pt);
}

注意关键字of在更换in for循环。 你实际上是循环的钥匙，而不是价值。

我需要纸jsdom画布使用简化方法paper.js从的NodeJS？

我试图使用paper.js'优良path.simplify方法在用户完成拉丝后，以产生平滑的曲线，以简化手绘路径。由于这是一个非HTML输出（TV的远程图解）我试图创造的NodeJS采取点和输出产生的简化曲线的控制点的微服务。

我尝试使用纸质jsdom和方法工作，不抱怨，但总是输出在所有点零个COORDS单个段。我不知道是否我应该使用纸jsdom画布，而不是能得到相应的输出。

下面是我试图建立节点模块：

const Path = require('paper').Path
const Point = require('paper').Point
const Project = require('paper').Project

// the next line produces side effects without which 
// the code will not run, but I'm not sure this is the way to go.
let p = new Project() 

function simplify (points) {
  let pts = []
  for (let point in points) {
    let pt = new Point(point.x, point.y)
    pts.push(pt)
  }
  let path = new Path({
    segments: pts,
    strokeColor: 'black',
    fullySelected: false
  })
  path.simplify(10)

  let simplePath = []
  for (const segment of path.segments) {
    // only one segment reaches this point
    // with all zeros in all the parameters
    console.log(segment.path)
    simplePath.push(
      {
        handleIn: { x: segment.handleIn.x, y: segment.handleIn.y },
        handleOut: { x: segment.handleOut.x, y: segment.handleOut.y },
        point: { x: segment.point.x, y: segment.point.y }
      })
    console.log(`
    hi   : (${segment.handleIn.x}, ${segment.handleIn.y})
    ho   : (${segment.handleOut.x}, ${segment.handleOut.y})
    point: (${segment.point.x}, ${segment.point.y})`)
  }
  return simplePath
}
module.exports = simplify

for (let point in points) {
    let pt = new Point(point.x, point.y);
    pts.push(pt);
}

for (let point of points) {
    let pt = new Point(point.x, point.y);
    pts.push(pt);
}