OFF
#
#  tetra.off
#  A tetrahedron.
#  There is extra RGB information in the face field.
#
4 4 6
   0.0        0.0        2.0
   1.632993  -0.942809  -0.666667
   0.000000   1.885618  -0.666667
  -1.632993  -0.942809  -0.666667
  3  1 0 3  0.784 0.000 0.000
  3  2 0 1  0.784 0.000 0.000
  3  3 0 2  0.784 0.000 0.000
  3  3 2 1  0.784 0.000 0.000