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 🙏

© 2024 – Pkg Stats / Ryan Hefner

yaot

v1.1.3

Published

Yet another octree

Downloads

83,544

Readme

yaot Build Status

Octree in javascript. Extremely fast module to query points in 3D space. Can be used to find points under mouse cursor in 3D scene.

usage

This module is best suited for static scenes, where points are not changed over time. To get started initialize the tree:

// First we need to create the tree:
var createTree = require('yaot');

var tree = createTree();
var points = [
  0, 0, 0, // First point at 0, 0, 0
  10, 0, 0 // second point at 10, 0, 0
]
tree.init(points);

// Now we are ready to query it:
// Which points lie inside sphere with center at 0, 0, 0 and radius 2?
var matches = tree.intersectSphere(0, 0, 0, 2);
// matches[0] === 0 -> the point at first index of `points` array is there!

// Let's extend our sphere:
var matches = tree.intersectSphere(0, 0, 0, 20);
// matches[0] === 0 -> Point at index 0 is here too
// matches[1] === 3 -> Point at index 3 from `points` array also inisde

You can also query points which lies inside octants intersected by a ray. This is very useful when you want to know which points lie under mouse cursor.

var rayOrigin = {
  x: 1, y: 0, z: 0
};
var rayDirection = {
  x: -1, y: 0, z: 0
};
var matches = tree.intersectRay(rayOrigin, rayDirection)

// If you want to limit where ray starts checking against intersection
// you can pass option `near` argumnet:
var near = 10; // by default it is 0, but could be made bigger!
var matches10PixelsAway = tree.intersectRay(rayOrigin, rayDirection, near);

// You can also limit upper bound by setting `far` argument:
var far = 100; // By default it is positive infinity, which matches all.
var matchesPointsBetween10And100Pixels =
    tree.intersectRay(rayOrigin, rayDirection, near, far);

To see how to use it with three.js please read about demo below.

demo

A three.js demo is available here (src). You can compare its performance to native three.js raycaster.intersectObjects() method (src). Open dev console on both pages to see the timers. Octree solution is 42 times faster than native raycaster.intersectObjects().

Video comparison is available here: https://www.youtube.com/watch?v=9Z-Yzb-WSKg

Keep in mind that raycaster is generalized solution which works with any three.js objects, while octree is very much specialized.

This module is also used in the code galaxies. Source code is here.

install

With npm do:

npm install yaot

license

MIT