npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2025 – Pkg Stats / Ryan Hefner

simplify-planar-graph

v2.0.1

Published

Simplifies a planar graph

Downloads

59,241

Readme

simplify-planar-graph

Simplifies a planar graph by removing small or nearly flat corners.

Example

var simplify = require("simplify-planar-graph")

//Create a circle
var positions = []
var edges = []
for(var i=0; i<100; ++i) {
  var theta = i / 100 * Math.PI * 2.0
  positions.push([Math.cos(theta), Math.sin(theta)])
  edges.push([i, (i+1)%100])
}

//Simplify it
console.log(simplify(edges, positions, 0.1))

Output:

{ positions:
   [ [ 0.9921147013144779, 0.12533323356430426 ],
     [ 0.8090169943749475, 0.5877852522924731 ],
     [ 0.48175367410171516, 0.8763066800438637 ],
     [ -0.30901699437494734, 0.9510565162951536 ],
     [ -0.7705132427757891, 0.6374239897486899 ],
     [ -0.9980267284282716, 0.06279051952931358 ],
     [ -0.9510565162951535, -0.30901699437494773 ],
     [ -0.5877852522924732, -0.8090169943749473 ],
     [ -0.18738131458572463, -0.9822872507286887 ],
     [ 0.535826794978996, -0.8443279255020155 ],
     [ 0.7705132427757894, -0.6374239897486896 ] ],
  edges:
   [ [ 0, 1 ],
     [ 1, 2 ],
     [ 2, 3 ],
     [ 3, 4 ],
     [ 4, 5 ],
     [ 10, 0 ],
     [ 5, 6 ],
     [ 6, 7 ],
     [ 7, 8 ],
     [ 8, 9 ],
     [ 9, 10 ] ] }

Install

npm install simplify-planar-graph

API

require("simplify-planar-graph")(edges, positions, tolerance)

Simplies a planar graph to a given tolerance

  • edges are the edges of the graph represented by pairs of vertex indices
  • positions is a list of vertex coordinates encoded as an array of 2D arrays
  • tolerance controls the target aspect ratio of the corners of the mesh

Returns A new planar graph encoded as a JSON object with two properties:

  • edges is an array of edges encoded as pairs of indices
  • positions is an array of positions for the simplicial complex

Note The current implementation does not detect the removal of features which cross existing line segments. Picking a high tolerance value may result in destroying the planarity of the resulting graph. Eventually if it becomes a priority I may go back and implement code to detect and handle these cases.

Credits

(c) 2014 Mikola Lysenko. MIT License