OBJ to JSON conversion

obj2json.py

#!/usr/bin/python
# coding=utf-8

# Base Python File (obj2py.py)
# Created: Sun 15 May 2011 05:21:50 PM CEST
# Version: 1.0
#
# This Python script was developped by François-Xavier Thomas.
# You are free to copy, adapt or modify it.
# If you do so, however, leave my name somewhere in the credits, I'd appreciate it ;)
# 
# (ɔ) François-Xavier Thomas <[email protected]>

import re
import sys
import json

vertices = []
normals = []
triangles = []

with open (sys.argv[1]) as f:
	for line in f:
		m_vertex = re.match (r"^v (?P<x>[\d.e\-]+) (?P<y>[\d.e\-]+) (?P<z>[\d.e\-]+).*$", line, re.M)
		if m_vertex:
			vertices.append (float(m_vertex.group ('x')));
			vertices.append (float(m_vertex.group ('y')));
			vertices.append (float(m_vertex.group ('z')));
			continue

		m_normal = re.match (r"^vn (?P<x>[\d.e\-]+) (?P<y>[\d.e\-]+) (?P<z>[\d.e\-]+).*$", line, re.M)
		if m_normal:
			normals.append (float(m_normal.group ('x')));
			normals.append (float(m_normal.group ('y')));
			normals.append (float(m_normal.group ('z')));
			continue

		m_face = re.match (r"^f (?P<idv1>\d+)//(?P<idn1>\d+) (?P<idv2>\d+)//(?P<idn2>\d+) (?P<idv3>\d+)//(?P<idn3>\d+).*$", line, re.M)
		if m_face:
			triangles.append (int (m_face.group('idv1'))-1);
			triangles.append (int (m_face.group('idv2'))-1);
			triangles.append (int (m_face.group('idv3'))-1);
			continue

		m_face = re.match (r"^f (?P<idv1>\d+)/(?P<idn1>\d+) (?P<idv2>\d+)/(?P<idn2>\d+) (?P<idv3>\d+)/(?P<idn3>\d+).*$", line, re.M)
		if m_face:
			triangles.append (int (m_face.group('idv1'))-1);
			triangles.append (int (m_face.group('idv2'))-1);
			triangles.append (int (m_face.group('idv3'))-1);
			continue

		m_face = re.match (r"^f (?P<idv1>\d+) (?P<idv2>\d+) (?P<idv3>\d+).*$", line, re.M)
		if m_face:
			triangles.append (int (m_face.group('idv1'))-1);
			triangles.append (int (m_face.group('idv2'))-1);
			triangles.append (int (m_face.group('idv3'))-1);
			continue

output = { 'vertices' : vertices, 'indexes': triangles, 'normals': normals }
print (json.dumps (output, indent=2))