add a number of vibration motors and you also have force feedback, let it not harden at all and you have a screen but for hands
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actually due to [dayjob] I am mildly experienced in this area and could totally make it work
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would need a competent EE person for wireless power and miniaturization of the nodules, and idk if there's a putty that's up to spec
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but there's a huge niche for "gesture recognition interface that 1. works at all and 2. has force feedback"
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current video recognition-based gesture interfaces simply can't deal with hands occluding each other and themselves
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force feedback is limited to, like, what was the state of the art, ultrasound and airflows? I've not even used this, it's that experimental
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an alternative to the putty would be a reconfigurable skeleton with an elastic skin, less messy but more unknown and harder to fix
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ideally I'd have something like a small shoggoth that could reconfigure itself but I don't know of anything that would allow it to do that
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hmm trying to think of a workflow
say you have a 3d object on a screen and a bit of putty in front of you
software matches nodules to mesh
you knead it a bit until the thing on the screen has the right shape, select/deselect a few nodules for fine tuning
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then you "detach", rotate your workpiece on the screen, focus another area, repeat until content
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