├── README.md
├── obj2sc.js
└── package.json


/README.md:
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 1 | # obj2sc
 2 | Command line tool that converts OBJ files to a JSON formatted simplicial complex
 3 | 
 4 | # Install
 5 | 
 6 | ```
 7 | npm i -g obj2sc
 8 | ```
 9 | 
10 | # Usage
11 | 
12 | ```
13 | obj2sc < mymesh.obj > mymesh.json
14 | ```
15 | 
16 | # Credits
17 | (c) 2017 Mikola Lysenko. MIT License
18 | 


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/obj2sc.js:
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 1 | #!/usr/bin/env node
 2 | 
 3 | var str = []
 4 | process.stdin
 5 |   .setEncoding('utf-8')
 6 |   .on('readable', function () {
 7 |     var chunk
 8 |     while (chunk = process.stdin.read()) {
 9 |       if (chunk) {
10 |         str.push(chunk)
11 |       }
12 |     }
13 |   })
14 |   .on('end', function () {
15 |     var verts = []
16 |     var vt = []
17 |     var vn = []
18 |     var faces = []
19 |     var uv = []
20 |     var normals = []
21 | 
22 |     str.join('').split('\n').forEach(function (line) {
23 |       var toks = line.split(/\s+/)
24 |       if (toks[0] === 'v') {
25 |         verts.push(toks.slice(1).map((x) => +x))
26 |       } else if (toks[0] === 'vt') {
27 |         vt.push(toks.slice(1).map((x) => +x))
28 |       } else if (toks[0] === 'vn') {
29 |         vn.push(toks.slice(1).map((x) => +x))
30 |       } else if (toks[0] === 'f') {
31 |         var f = []
32 |         for (var i = 1; i < toks.length; i++) {
33 |           var vtn = toks[i].split('/')
34 |           var vi = (vtn[0]-1)|0
35 |           f.push(vi)
36 |           if (vtn[1]) uv[vi] = vt[(vtn[1]-1)|0] // texture index
37 |           if (vtn[2]) normals[vi] = vn[(vtn[2]-1)|0] // normal index
38 |         }
39 |         if (f.length === 3) faces.push(f)
40 |         else {
41 |           for (var i = 2; i < f.length; i++) {
42 |             faces.push([f[0],f[i-1],f[i]])
43 |           }
44 |         }
45 |       }
46 |     })
47 | 
48 |     var data = {
49 |       positions: verts,
50 |       cells: faces
51 |     }
52 |     if (uv.length) {
53 |       data.uv = uv
54 |     }
55 |     if (normals.length) {
56 |       data.normals = normals
57 |     }
58 |     console.log(JSON.stringify(data))
59 |   })
60 | 


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/package.json:
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 1 | {
 2 |   "name": "obj2sc",
 3 |   "version": "1.0.0",
 4 |   "description": "Command line tool to convert OBJ format meshes to JSON formatted simplicial complexes",
 5 |   "main": "obj2sc.js",
 6 |   "bin": {
 7 |     "obj2sc": "obj2sc.js"
 8 |   },
 9 |   "scripts": {
10 |     "test": "echo \"Error: no test specified\" && exit 1"
11 |   },
12 |   "repository": {
13 |     "type": "git",
14 |     "url": "git+https://github.com/mikolalysenko/obj2sc.git"
15 |   },
16 |   "keywords": [
17 |     "obj",
18 |     "parse",
19 |     "simplicial",
20 |     "complex",
21 |     "cells",
22 |     "triangles",
23 |     "mesh",
24 |     "3d"
25 |   ],
26 |   "author": "Mikola Lysenko",
27 |   "license": "MIT",
28 |   "bugs": {
29 |     "url": "https://github.com/mikolalysenko/obj2sc/issues"
30 |   },
31 |   "homepage": "https://github.com/mikolalysenko/obj2sc#readme"
32 | }
33 | 


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