A simple stl loader to convert to a ascii format

stl-loader.js

//load files and parse libraries
var fs = require('fs');
var stl = require('stl');

//load stl file
var facets = stl.toObject(fs.readFileSync('leafer-thingie.stl'));

//round points to minimize usage
function myRound(num) {
    return Math.round(num * 1000) / 1000;
}

//join text together
//level 1, iterate over facets
facets = facets.facets.map(function(facet) {
    //level 2, iterate over facet verticies
    return facet.verts.map(function(vert) {
        //3d point returned here (with rounding)
        return `${myRound(vert[0])},${myRound(vert[1])},${myRound(vert[2])}`;
    }).join("|"); //join with | symbol, seperating 3d verticies
}).join("@"); //seperate facet

var leaferJson = facets;

fs.writeFileSync('leafer.bin', leaferJson, 'ascii'); //write ascii 

console.log(`wrote ${leaferJson.length} bytes`);