Working on our prototype we had some problems, that are here reported and also it’s possible to see how we had resolved.
:: Because we programmed in Processing we encountered some limitations when working with the video. We tried different formats (.mov, .avi) and different ways to compress the video, but Processing frequently crashed. So we decided to export the video frame by frame and animate the frames directly in the code, but here the limitation was that Processing accepts for a video no more 120 frames.
:: Our ultrasonic sensor had all-in-one input-output information, so when a person interacting with the prototype didn’t cover all the range of the sensor, the sensor detected people within its range but outside the prototype. This caused the Processing program to crash. The solution might be to use a sensor with separate devices for input and output, to limit the range to just the preferred zone.