Trackball Controller Xbox 360
This one is invented by Jay Garcia around , but funding never came.
![trackball controller xbox360 2013-88040](itb/trackball_controller_xbox360_2013-88040.jpg)
![trackball controller xbox360 2013-66004](itb/trackball_controller_xbox360_2013-66004.jpg)
Here is the prototype playing first-person-shooter game.
![XBOX 360 Trackball Controller mVbQ](i/XBOX_360_Trackball_Controller_mVbQ.jpg)
- https://youtu.be/wRKFoJsUV1k
- FPS Trackball Controller for XBOX 360.
another one:
![XBOX 360 Trackball Controller 5N3j](i/XBOX_360_Trackball_Controller_5N3j.jpg)
- https://youtu.be/W38JTIKSGGw
- XBOX 360 Trackball Controller Circular Deadzone Tutorial ( Crysis 2 )