This script creates a cube to visualize the field of view of a camera.
Scale the cube with the "viewAngleSize" attribute on the camera.
Load the script and execute following commands from the Python command line:
jlViewAngle() -> creates a viewAngle on selected camera
jlViewAngle("camera1") -> creates a viewAngle on "camera1"
http://dl.dropbox.com/u/34893475/jlViewAngle.py