The lights are on
Kinect continues to be a fertile testbed for hacks and proof of concept videos, as this video shows. In it, YouTube user demize2010 plays Call of Duty 4: Modern Warfare on a PC using a combination of Kinect input for gestures such as leaning, throwing grenades, and melee attacks, and a Wii remote and nunchuk for in-game motion inputs. It looks as though it works pretty well, too.
As demize2010 points out in the comments, the goal was to make something like this playable--a challenge, considering Kinect wasn't designed for the kind of quick, precision-based input that Call of Duty requires. Watch the video below. When you're done, be sure to check out some of his other Kinect projects, including Doom and Zelda hacks.
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