Node-particles NPM

Node-Particles

This repository provides a simple, programatic way of defining a particle system in Javascript and use it in your NodeJs project (i.e. as a backend library).

The base functionality has been forked and adapted from JavaScript-Particle-System so if you are looking for a particle system for the browser that's the place to go. There is also a very nice article from the same author here.

Screenshots

Usage

The easiest way to get the library is to use npm:

npm install node-particles

Then from your scripts you can consume it using require:

var ns = require ("node-particles")

Quick Example

var np = require ("node-particles")

var ps = new np.ParticleSystem ();  // creates a new ParticleSystem instance

// Creates an Emitter at x:188,y:158 whose particles have a x:3,y:0 speed.
// Particles size is 15, ttl = -1, the position of the particle is jittered +/- 0.15 
// and 1 particle to be emitted on every cycle.
ps.addEmitter (new PS.Point(188,158), new PS.Point(3,0), 15, -1, 0.15, 1);

// Adds a field at x:254,y:211 with a mass of 500 (positive means attraction)
ps.addField (new PS.Point(243,211), 500);

// Adds a field at x:443,y:411 with a -5 mass (repulsion)
ps.addField (new PS.Point(443,411), -5);

// Run 10 cycles on the ParticleSystem. On each one the particles are generated
// and the previous ones position is updated.
ps.evolve(10);

ps.getParticles().forEach (function (p) {
  console.log(p.position); // displays each particle position
});