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"\"The iPad's IPS panel is pressure-sensitive, you say?\" No, that's not quite right, but with some clever software and a special capacitive stylus, the folks at Ten One Design built a convincing proof of concept anyhow. While we're not quite sure how it works, the current theory states that the soft tip of the stylus expands like a brush when you press it down, generating a \"larger press\" that can be detected by the hooks in Ten One's code -- which they soon plan to share as a free software library (assuming Apple allows) with developers around the world. See it in action in a video after the break, and if you're feeling your inner Rorschach today, let us know what you see in the above drawing."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2010/07/05/pressure-sensitive-drawing-coming-to-ipad-in-free-software-libra/>