An implementation of the earcut polygon triangulation algorithm. The code is a port of [link:https://github.com/mapbox/earcut mapbox/earcut].
data -- A flat array of vertice coordinates.
holeIndices -- An array of hole indices if any.
dim -- The number of coordinates per vertice in the input array.
[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]