Nimble Porridge Muncher

    lucy-b2

    1.0.1 • Public • Published

    Lucy b2 Build Status

    Box2D by Erin Catto with google's particle simulation liquidfun for node.js.

    This fork

    Fork from box2d.js.

    Due to the fact that we are not creating sub-classes of C++ classes, we do not need to use 'b2' prefix to separate namespaces so this prefix has been removed.

    // Instead of writing box2d.b2Vec2
    // Write this:
    const b2 = require ( 'lucy-b2' )
    let gravity = new b2.Vec2  ( 0, -9.8 )
    let world   = new b2.World ( gravity )
    // ...
    let shape = new b2.PolygonShape

    Documentation

    Example

    Here is a falling ball simulation.

    'use strict'
    const b2 = require ( 'lucy-b2' )
     
    // Create world
    let gravity = new b2.Vec2  ( 0, -9.8 )
    let world   = new b2.World ( gravity )
     
    // Define body
    let bodyDef = new b2.BodyDef
    bodyDef.type = b2.BodyType.dynamicBody
     
    // Create body with definition
    let body = world.CreateBody ( bodyDef )
     
    // Define fixture
    let fixDef = new b2.FixtureDef
    fixDef.density     = 1.0
    fixDef.friction    = 0.2
    fixDef.restitution = 0.8
     
    let shape = new b2.PolygonShape
    shape.SetAsBox ( 0.1, 0.1 )
     
    fixDef.shape = shape
     
    // Create fixture
    body.CreateFixture ( fixDef )
     
    // Move body into initial position ( and rotation )
    body.SetTransform ( 0, 2, 0 )
     
    // Run simulation
    for ( let i = 0; i < 10; i++ )
    { world.Step ( 1/60, 10, 10 )
      console.log ( body.GetPosition ().y )
    }

    Installation

    npm install lucy-b2 --save

    Tests

    npm test

    Contributing

    Please see box2d.js for contributions. The port from this library is just a few Regexp executed on the minified JS version and a wrapper for node.js.

    Please use 'jessy style' if you want to write some unit tests for lucy-b2...

    Release History

    • 1.0.1 (2015-09-22) Fixed readme.
    • 1.0.0 (2015-09-09) Initial release.

    Install

    npm i lucy-b2

    DownloadsWeekly Downloads

    7

    Version

    1.0.1

    License

    Zlib

    Last publish

    Collaborators

    • gbucher