"Lego Group design manager Maarten Simons whipped out a "Lego ruler" made of standard Lego bricks divided into segments that were each 10 Lego studs, or roughly 8cm (3.15 inches) long. He attached a Smart Brick to one end of the ruler, and dragged a second Smart Brick along its length. The Smart Bricks changed color every time another 10 ten studs was passed, exactly at the dividing lines of each segment."
"Simons then moved the Smart Bricks away from the ruler and performed the same trick. Using just a pair of Smart Bricks, he was able to measure the distance between two points in 2D and 3D space. Simons says the bricks can accurately track each other's position at distances of up to roughly 4 to 5 meters (12-16 feet) away."
Lego Smart Bricks can precisely track relative position and orientation between bricks. A demonstration used a "Lego ruler" made of standard bricks divided into 10-stud segments (roughly 8 cm each). A Smart Brick attached to one end and a second Smart Brick dragged along caused the bricks to change color exactly when each 10-stud divider was passed. Using two Smart Bricks, distance between two points was measured in 2D and 3D. The bricks reportedly track positions accurately up to roughly 4 to 5 meters (12–16 feet) and detect precise facing orientation. Potential uses include precise aiming games and enhanced Lego robotics.
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