mid: 439
url: http://www.princeton.edu/~perry/scenes/177ext.wrl.gz
ref_url: http://www.princeton.edu/~perry/vrml.html
format: wrl 
pid: 11727
polygons: 532
connected_components: 45
average_dihedral_angle: 1.57668
bounding_box: xmin = 0.025, ymin = 0.025, zmin = 0.025, xmax = 0.588834, ymax = 0.191202, zmax = 0.975
avg_depth: 1.331550
center: (0.310026,0.074017,0.504586)
scale: 0.517767
principle_axes: (0.024639,0.048971,0.998496), (0.999655,0.007843,-0.025053), (0.009058,-0.998769,0.048760)
principle_values: (0.060250,0.022321,0.001110)