For two decades, Hawk-eye has been a digital referee in cricket, tennis, soccer, rugby, Irish hurling, badminton, the new XFL and other sports.
It is also having an impact on NASCAR, and the race today in Daytona to detect if any of the teams have been "creative". Eight projectors display patterns on each car, and 17 cameras track the patterns for about half a minute. That allows creation of a 3D model of the car, comparison to its CAD model and highlighting of areas which fail the .150-inch tolerance on metal and .200-inch tolerance on glass surfaces.
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