Hello,
  I want to create a simple display that will read data from an
external source and show update of an obects position in 3d.   For
example, read a file containing (x,y,z) values and show a particles
movement.  I have looked through several examples and looked at
animation using Interpolators, but they always show things moving
along the X axis and never seem to discuss external data, always the
idea of movement along a predefined path.  (Note:  I am used to
gl/OpenGL concepts with double buffering, etc. for animation.)  If
anyone can point me towards an example I would greatly appreciate it.

Thank you