mesh-slice-polygon

slice a mesh with a plane and return the resulting polygon(s)

install

npm install mesh-slice-polygon

use

the following code is an extraction of example/readme-example.js

var createSlicer = require('./mesh-slice-polygon');
var slicer = createSlicer();
var stl = require('stl')
var fs = require('fs');

fs.createReadStream(__dirname + '/test/stl/cube-20mm.stl')
  .pipe(stl.createParseStream())
  .on('data', function(obj) {
    // add an array of vertices
    // [[x, y, z], [x, y, z], [x,y,z]]
    obj && obj.verts && slicer.addTriangle(obj.verts)
  })
  .on('end', function() {
    // slize at z=0
    console.log(slicer.slice(0).map(function(polygon) {
      return polygon.points;
    }));
  });

which outputs:

[ [ { x: -10, y: -10 },
    { x: 0, y: -10 },
    { x: 10, y: -10 },
    { x: 10, y: 0 },
    { x: 10, y: 10 },
    { x: 0, y: 10 },
    { x: -10, y: 10 },
    { x: -10, y: 0 } ] ]

example

npm run drop-slicer (you will need beefy globally installed)

example/drop-slicer.js allows someone to drop an stl anywhere in the document and it will slice from the maxZ to the minZ and render the resulting polygons to a canvas.

for example:

dropping this thingiverse thing:

ends up looking like:

license

MIT (see: license.txt)