Computer trickery makes these shadows 'dance'

You know how to turn crooked vases into an interesting art installation that remind us of Beauty and the Beast's singing pots and candlesticks? We'd like to say magic, but since we don't live in a Disney movie, the right answer is motion tracking and real-time 3D rendering. The installation's creators, artist Laurent Craste and digital agency Dpt., used a hidden projector to make the vases' shadows dance whenever a viewer swings the lamp above them. Their movements even depend on the lamp's swing, so side-to-side swinging triggers the same animation, while a more circular one also shows the lamp's shadows going in circles. Sadly, you can't see this in person anymore (it was displayed at a festival in Montreal in May), but you can watch the video after the break.