conway-hart

A port of George Hart's JavaScript implementation/extension of Conway's polyhedral notation to the CommonJS module system. Here are some useful links that can help explain what it all means:

George Hart's original implementation: http://www.georgehart.com/virtual-polyhedra/conway_notation.html
The Wikipedia page on Conway's notation

Installation

Just use npm:

npm install conway-hart

Example

Here is an example showing how to use this library to generate a shape:

require("conway-hart")("djmeD");

Which produces the following polygon:

If you want to try it out for yourself without installing node.js, here is ansome other polytopes for yourself, here is an interactive WebGL demo.

Usage

Conway/Hart notation is a way of specifying spherical polyhedra by subdividing regular polyhedra. The way it works is that you first specify a seed polyhedra, and then apply a sequence of operators. Each of these methods returns a javascript object with three fields:

name: The name of the solid.
faces: The faces of the solid, represented as a list of indices into the vertices.
positions: The positions of the vertices of the solid.

You can also invoke the Conway operators directly. For example:

var ch = require("conway-hart");
ch.dual(ch.kis(ch.icosahedron(), 3));

The convention is that the name of the method is just the same as the name of the operator in lower case.

Seeds

Here is a list of all the available seeds. The ones with an n next to their symbol take an extra parameter describing how many faces are on their base.