In this video you see “UZU” by Jason Smith, nicely covered by Arstechnica and shot with my iPhone at 4 AM. Arstechnica: “Uzu reacts to touches to the screen, and can handle up to 10 instances at any given time. If nothing capable of capacitance is making contact with the screen, green, red, and yellow particles float around in a Brownian motion-inspired dance. By my calculations, at any one time there can be up to 2.25 million calculations taking place. Each particle on screen has 25 properties attached to it, including—but not limited to—position, velocity, acceleration, RGB color, HSV color, and a number of different oscillators. Smith says the “sweet spot” seems to be 3,000 particles on the screen at any given time.” The real feeling, though, cannot be understood only by watching a video, you have to interact with the app. It’s an absolute “there’s no spoon” thing. Edit: There are 9.000 particles displayed, instead of 3.000 “sweet spot” Jason mentioned and the performance is mind blowing. The main reason may be the different hardware – iPad 2 instead of iPad 1. Also, the app is just around 1 MB.

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