In Class Exercise

Take the program cones.py, and add camera movement to it. (http://resumbrae.com/ub/dms423/10/cones.py)

Add code to the specialKey function, where the print statements are, to make the camera:

• move left (negative X direction) when the left arrow key is pressed
• move right (positive X) when the right arrow key is pressed
• move forward (negative Z) when the up arrow key is pressed
• move backward (positive Z) when the down arrow key is pressed

Extra challenges:
   Add controls to turn the camera (around the Y axis)
   Make the camera move forward/back etc even when turned - rather than moving along the world X & Z axes