Moving In on the Wii

A unique motion-based controller from Motus is designed to create a more realistic experience for video game players.

Consumers seem enchanted by the Nintendo Wii's motion-controlled remote, buying more than one million units of Wii hardware last December alone, according to market research firm NPD Group. A Boston-based company, Motus Corporation, hopes to take advantage of the Wii's popularity through a new product: the Motus Darwin , which allows motion-based control on non-Nintendo game systems, including the PC.

Reaching for realism: Motus Corporation hopes its Darwin game controller (above) can transplant the popularity of the Nintendo Wii’s motion control to other consoles and PCs. Slated for release this fall, the Darwin is intended to feel more realistic than the Wii Remote. Credit: Motus Corporation

Motus is not the first company to compete with the Wii; the Sixaxis controller for the PlayStation 3 also provides motion-based control, for example. But Motus chairman Satayan Mahajan says the Darwin, expected to retail for $79-$99, allows a more realistic game play experience than is currently available.

The Darwin, which was designed to resemble a samurai sword, has its roots in specialized golfing hardware called iClub, also made by Motus. Mahajan says the iClub was designed to help serious golfers improve their swings by sensing and analyzing minute details of the motion. Mahajan hopes to continue this verisimilitude with the Darwin. Where players often operate the Wii Remote one-handed in sports games, Mahajan wants the Darwin to feel more realistic, allowing players of a golf game, for example, to put two hands on the remote and swing it like a real golf club. "The Wii is a great device," he says. "But they're going from very simple applications, and trying to become more complex and capture more complex motion. We've gone from this very complex [process of] capturing very precise motions of the human body to something that's actually less complex."

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As part of developing realistic game play, Mahajan says, Motus designed the Darwin to calculate its position differently than the Wii Remote. The Wii Remote tracks its position via accelerometers and an infrared sensor that users must attach to their televisions. The Motus Darwin measures absolute position with respect to earth itself. Using gyroscopes and accelerometers, the controller orients itself to the magnetic north, and senses the direction it is pointing.

Mahajan explains that this method has not been used before because the gyroscopes and accelerometers have a tendency towards errors. Through Motus's work on iClub, he says, the company has designed a combination of hardware, software and firmware that corrects the error. Finally, the system relays its positional information to the console in fewer than 30 milliseconds, Mahajan says, adding that this is faster than the human ability to perceive delay.