blender_to_json.py

import bpy
import json

obj = bpy.data.objects['XW']

with open('/home/zeffii/Desktop/sw/geom_file3.tkg', 'w') as ofile:
    
    geom_dict = {}
    geom_dict['verts'] = []
    geom_dict['edges'] = []
    geom_dict['faces'] = []

    # verts
    add_component = geom_dict['verts'].extend
    for v in obj.data.vertices:
        add_component([round(v.co.x, 5), round(v.co.y, 5), round(v.co.z, 5)])
    
    # faces
    add_component = geom_dict['faces'].extend
    for face in obj.data.polygons:
        add_component(list(face.vertices[:]))

    # edges    
    add_component = geom_dict['edges'].extend
    edges_subset = [e for e in obj.data.edges if e.crease == 1.0]
    for edge in edges_subset:
        add_component(list(edge.vertices[:]))
   
    ofile.write('var obj = ')
    ofile.write(json.dumps(geom_dict))