Alpha shapes are a generalization of Delaunay triangulations. Given a parameter alpha and a point set, they compute a simplicial complex which covers the point set in simplices whose circum radii are less than 1/alpha.
To see this in action, try out the demo
var alphaComplex = require('alpha-complex')
var points = []
for(var i=0; i<100; ++i) {
points.push([Math.random(), Math.random()])
}
console.log(alphaComplex(0.1, points))
This module works in node.js/iojs/browserify and supports point sets in any dimension.
npm i alpha-complex
var cells = require('alpha-complex')(alpha, points)Constructs the alpha complex of the given set of points.
alpha is the curvature of the alpha complexpoints is a list of points encoded as arraysReturns The alpha-complex of the point set.
(c) 2015 Mikola Lysenko. MIT License